Poorly sited U.S. temperature instruments not responsible for artificial warming

By: Dr. Jeff Masters , 25. tammikuuta 2010 klo 17:57 (GMT)

Share this Blog
4
+

Former TV weatherman Anthony Watts, who runs the popular global warming contrarian website, "Watts Up With That", was convinced that many of the U.S. network of surface weather stations had serious flaws in their siting that was causing an artificial warm bias in the observed increase in U.S. temperatures of 1.1°F over the past century. To address this concern, Watts established the website surfacestations.org in 2007, which enlisted an army of volunteers to travel the U.S. to obtain photographic evidence of poor siting of weather stations. The goal was to document cases where "microclimate" influence was important, and could be contaminating temperature measurements. (Note that this is a separate issue from the Urban Heat Island, the phenomenon where a metropolitan area in general is warmer than surrounding rural areas). Watts' volunteers--650 strong--documented the siting of 865 of the 1,218 stations used in the National Climatic Data Center's U.S. Historical Climatology Network (USHCN) for tracking climate change. As reported in Watt's 2009 publication put out by the Heartland Institute, the volunteers "found stations located next to the exhaust fans of air conditioning units, surrounded by asphalt parking lots and roads, on blistering-hot rooftops, and near sidewalks and buildings that absorb and radiate heat." Watts surmised that these poorly-sited stations were responsible for much of the increase in U.S. temperatures over the past century, due to "a bias trend that likely results from the thermometers being closer to buildings, asphalt, etc." Watts concluded, "the U.S. temperature record is unreliable. And since the U.S. record is thought to be the best in the world, it follows that the global database is likely similarly compromised and unreliable".


Figure 1. A poorly sited temperature sensor in Marysville, California, used for the USHCN. The sensor is situation right next to an asphalt parking lot, instead in the middle of a grassy field, as it is supposed to be. The sensor is also adjacent to several several air conditioners that blow their exhaust into the air nearby. Image credit: surfacestation.org.

Analysis of the data disagrees with Watts' conclusion
While Watts' publication by the Heartland Institute is a valuable source of information on siting problems of the U.S. network of weather stations, the publication did not undergo peer-review--the process whereby three anonymous scientists who are experts in the field review a manuscript submitted for publication, and offer criticisms on the scientific validity of the results, resulting in revisions to the original paper or outright rejection. The Heartland Institute is an advocacy organization that accepts money from corporate benefactors such as the tobacco industry and fossil fuel industry, and publishes non-peer reviewed science that inevitably supports the interests of the groups paying for the studies. Watts did not actually analyze the data to see if taking out the poorly sited surface stations would have a significant impact on the observed 1.1°F increase in U.S. temperatures over the past century. His study would never have been publishable in a peer-reviewed scientific journal.


Figure 2. Annual average maximum and minimum unadjusted temperature change calculated using (c) maximum and (d) minimum temperatures from good and poor exposure sites (Menne 2010). Poor sites showed a cooler maximum temperature compared to good sites. For minimum temperature, the poor sites were slightly warmer. The net effect was a cool bias in poorly sited stations. The dashed lines are for stations ranked by NOAA, while the solid lines are for the stations ranked by surfacestations.org.

Fortunately, a proper analysis of the impact of these poorly-sited surface stations on the U.S. historical temperature record has now been done by Dr. Matthew Menne and co-authors at NOAA's National Climatic Data Center (NCDC). In a talk at last week's 90th Annual Meeting of the American Meteorological Society, Dr. Menne reported the results of their new paper just accepted for publication in the Journal of Geophysical Research titled, On the reliability of the U.S. Surface Temperature Record. Dr. Menne's study split the U.S. surface stations into two categories: good (rating 1 or 2) and bad (ratings 3, 4 or 5). They performed the analysis using both the rating provided by surfacestations.org, and from an independent rating provided by NOAA personnel. In general, the NOAA-provided ratings coincided with the ratings given by surfacestations.org. Of the NOAA-rated stations, only 71 stations fell into the "good" siting category, while 454 fell into the "bad" category. According to the authors, though, "the sites with good exposure, though small in number, are reasonably well distributed across the country and, as shown by Vose and Menne [2004], are of sufficient density to obtain a robust estimate of the CONUS average". Dr. Menne's study computed the average daily minimum and maximum temperatures from the good sites and poor sites. The results were surprising. While the poor sites had a slightly warmer average minimum temperature than the good sites (by 0.03°C), the average maximum temperature measured at the poor sites was significantly cooler (by 0.14°C) than the good sites. As a result, overall average temperatures measured at the poor sites were cooler than the good sites. This is the opposite of the conclusion reached by Anthony Watts in his 2009 Heartland Institute publication.

Why did the poorly sited stations measure cooler temperatures?
The reason why the poorly-sites stations measured cooler temperatures lies in the predominant types of thermometers used at the two types of sites. An electronic Maximum/Minimum Temperature System (MMTS) is used at 75% of the poor sites. These MMTS sensors are attached by cable to an indoor readout device, and are consequently limited by cable length as to how far they can be sited from the building housing the indoor readout device. As a result, they are often located close to heated buildings, paved surfaces, air conditioner exhausts, etc. It turns out that these MMTS thermometers have a flaw that causes them to measure minimum temperatures that are slightly too warm, and maximum temperatures that are considerably too cool, leading to an overall cool bias in measured average temperatures. In contrast, only 30% of the "good" sites used the MMTS sensors. The "good" sites predominantly used Liquid in Glass (LiG) thermometers housed in wooden shelters that were more easily located further from the buildings where the observers worked. Since the poorly-sites stations were dominantly equipped with MMTS thermometers, they tended to measure temperatures that were too cool, despite their poor siting.


Figure 3. Comparison of U.S. average annual (a) maximum and (b) minimum temperatures calculated using USHCN version 2 temperatures. Temperatures were adjusted to correct for changes in instrumentation, station relocations, and changes in the time of observation, making the trend from good sites show close agreement with poor sites. Good and poor site ratings are based on surfacestations.org. For comparison, the data between 2004 - 2008 taken by the new high-quality U.S. Climate Reference Network (USCRN, black dashed line) is shown, and displays excellent agreement for that time period. Image credit: Menne 2010.

Independent verification of recent USHCN annual temperatures
Clearly, the siting of many of the surface stations used to track climate change in the U.S. is not good. To address this issue, in 2004 NOAA created the U.S. Climate Reference Network, a collection of 114 stations in the continental United States for the express purpose of detecting the national signal of climate change. The stations were sited and instrumented with climate studies in mind, and can provide an extremely high-quality independent check on the old USHCN network. Each of 114 stations at 107 locations (some stations were installed as nearby pairs) is equipped with very accurate instruments in a triplicate configuration so that each measurement can be checked for internal consistency. As shown in Figure 3, the USCRN air temperature departures for 2004 - 2008 are extremely well aligned with those derived from the USHCN version 2 temperature data. For these five years, the the difference between the mean annual temperatures measured by the old USHCN compared to the new USCRN was just 0.03°C, with a mathematical correlation coefficient (r-squared) of 0.997. Menne et al. concluded, "This finding provides independent verification that the USHCN version 2 data are consistent with research-quality measurements taken at pristine locations and do not contain spurious trends during the recent past even if sampled exclusively at poorly sited stations. While admittedly this period of coincident observations between the networks is rather brief, the value of the USCRN as a benchmark for reducing the uncertainty of historic observations from the USHCN and other networks will only increase with time". The authors finally concluded, "we find no evidence that the CONUS temperature trends are inflated due to poor siting".

Crediting Anthony Watts
The surfacestations.org effort coordinated by Anthony Watts has made a valuable contribution to science, helping us better understand the nature of the errors in the U.S. historical temperature data set. In his talk last week at the AMS conference, and in the credits of his paper, Dr. Menne had some genuinely grateful comments on the efforts of Anthony Watts and the volunteers of surfacestations.org. However, as of this writing, Watts has made no mention on surfacestations.org or on wattsupwiththat.com of Dr. Menne's study.

I'll have a new post Wednesday or Thursday.

Jeff Masters

Reader Comments

Comments will take a few seconds to appear.

Post Your Comments

Please sign in to post comments.

or Join

Not only will you be able to leave comments on this blog, but you'll also have the ability to upload and share your photos in our Wunder Photos section.

Display: 0, 50, 100, 200 Sort: Newest First - Order Posted

Viewing: 1479 - 1429

Page: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30Blog Index

1479. Floodman
27. tammikuuta 2010 klo 17:44 (GMT)
Quoting TampaSpin:
1431. Floodman 11:26 AM EST on January 27, 2010

ARe you in Taxas now! Looks like some snow heading that direction again.


Looks like it's going to miss us here in Fort Worth; they're calling for flurries, essentially, along with a little sleet when the change from rain to frozen precip happens. No call for appreciable accunulation. Now Oklahoma, on the other hand...going to be bad...
Member Since: 2.08.2006 Posts: 10 Comments: 9922
1478. TampaTom
27. tammikuuta 2010 klo 17:40 (GMT)
Quoting PcolaDan:
NEW BLOG!!!!!!


Thank God...
Member Since: 20.06.2005 Posts: 22 Comments: 1050
1476. PcolaDan
27. tammikuuta 2010 klo 17:37 (GMT)
NEW BLOG!!!!!!
Member Since: 22.08.2008 Posts: 12 Comments: 6010
1475. tornadodude
27. tammikuuta 2010 klo 17:36 (GMT)
From Purdue:

Indiana electricity rates may rise, growth in demand slow through 2013
Member Since: 28.06.2006 Posts: 24 Comments: 8185
1474. atmoaggie
27. tammikuuta 2010 klo 17:28 (GMT)
Quoting McBill:
"As to my original statement "Most of the stations that show no warming at all are rural ones", well, I cannot sit in here and post hundreds of data plots from rural stations. I suggest spending a day at the GISS site, caveats about their methods and the GHCN raw data aside."

So, to be clear, you can't provide a reference to back up your claim.

You could have said that to begin with rather than wasting folks time.

What? Oh, yes, I can. But I am not going to do it for you. I have done it here, to some degree, before.

I have already provided a number of items of published research about the disparity between the urban and rural stations.

Wasting folks' time? (What was that you said about "hold the snark"? Getting a bit snide, yourself, sport)
Member Since: 16.08.2007 Posts: 6 Comments: 12461
1473. PcolaDan
27. tammikuuta 2010 klo 17:19 (GMT)
Quoting AwakeInMaryland:
GOOD MORNING, WUnderland, from my "mixed" family to yours --

Day of Atonement (Yom Kippur)
Saturday, September 18, 2010

from www.catholic.com
Minor or venial sins can be confessed directly to God...


I suppose you want me to change my avatar to the other now, huh! :)


Member Since: 22.08.2008 Posts: 12 Comments: 6010
1472. tornadodude
27. tammikuuta 2010 klo 17:18 (GMT)
Quoting pastagirl:


Wow! I have a feeling we're going to end up with more than that here in Madison County.

Maybe I should go to the Co-op and get a saucer!


Member Since: 28.06.2006 Posts: 24 Comments: 8185
1471. pastagirl
27. tammikuuta 2010 klo 17:15 (GMT)
Quoting VAbeachhurricanes:


yeah im supposed to get 14 inches here! cant wait!!


Wow! I have a feeling we're going to end up with more than that here in Madison County.

Maybe I should go to the Co-op and get a saucer!
Member Since: 2.07.2006 Posts: 0 Comments: 13
1470. trinigal
27. tammikuuta 2010 klo 17:14 (GMT)
Quoting Jeff9641:


The newest model runs show Florida getting some incredible rain. It will not be out of the question for many areas over the Florida Penisula to pick up 10". The storms look to start Saturday then continue off and on thru next Firday. The average precip. for Orlando in Feb. is 2.4" and it looks like we will blow that out of the water.


Okay, that is exciting. Thanks :)
Member Since: 31.08.2007 Posts: 0 Comments: 171
1469. tornadodude
27. tammikuuta 2010 klo 17:11 (GMT)
Quoting Jeff9641:


Your fine don't worry.


hope so :p
Member Since: 28.06.2006 Posts: 24 Comments: 8185
1467. tornadodude
27. tammikuuta 2010 klo 17:10 (GMT)
1465. tornadodude
27. tammikuuta 2010 klo 17:08 (GMT)
I imagine that I'll probably have a ban anytime tho Lol
Member Since: 28.06.2006 Posts: 24 Comments: 8185
1464. AwakeInMaryland
27. tammikuuta 2010 klo 17:07 (GMT)
Quoting tornadodude:


Lol good afternoon, I'll work on that


Whoops, it IS afternoon...
I think you already did, re your post #1443.

I have to look up "venial," though! (:
Member Since: 19.08.2008 Posts: 32 Comments: 1918
1463. HadesGodWyvern (Mod)
27. tammikuuta 2010 klo 17:06 (GMT)
Fiji Meteorological Services
Tropical Disturbance Advisory #3
TROPICAL CYCLONE NISHA (06F)
3:00 AM FST January 28 2010
===================================

At 15:00 PM UTC, Tropical Cyclone Nisha (995 hPa) located at 15.7S 169.5W has 10 minute sustained winds of 35 knots expected to increase to 40 knots in the next 6-12 hours. The cyclone is reported as moving southeast at 12 knots. Position FAIR based on multispectral enhanced infrared radar imagery with animation and peripheral observations.

Gale Force Winds
===============
within 120 NM from the center in sectors from southeast to southwest and within 60 NM from the center elsewhere.

Deep convection remains persistent. Organization and outflow aloft remains good. Nisha lies under an upper ridge axis along a monsoon trough in a low sheared environment. System remains in a region of strong diffluence enhanced by a short-wave trouhg to the west. A northwest monsoonal surge continues to feed into the system. Sea surface temperatures is around 30C. Nisha is being steered southeast under a northwest steering field into an area of decreasing shear.

Dvorak based on LOG 10 spiral yielding..

DT=3.0, PT=3.0. FT based on DT.. thus

Dvorak Intensity: T3.0/3.0/D1.0/12HRS

Global models agree on a southeast track intially and further intensification before recurving it northeast.

Forecast and Intensity
=======================
12 HRS: 17.1S 168.2E - 40 knots (CAT 1)
24 HRS: 18.1S 167.0E - 45 knots (CAT 1)
48 HRS: 19.5S 165.4E - 50 knots (CAT 2)

THE NEXT TROPICAL DISTURBANCE ADVISORY ON TC NISHA WILL BE ISSUED AT AROUND 20:30 PM UTC...
Member Since: 24.05.2006 Posts: 48 Comments: 43702
1461. tornadodude
27. tammikuuta 2010 klo 17:05 (GMT)


(yellow numbers is POP)
Member Since: 28.06.2006 Posts: 24 Comments: 8185
1460. VAbeachhurricanes
27. tammikuuta 2010 klo 17:05 (GMT)
Quoting pastagirl:
Thanks for 1440 TampaSpin!

I've been looking for some news concerning the amount of snow that expected in VA this weekend.


yeah im supposed to get 14 inches here! cant wait!!
Member Since: 6.09.2007 Posts: 0 Comments: 5706
1458. tornadodude
27. tammikuuta 2010 klo 17:02 (GMT)
Quoting AwakeInMaryland:
GOOD MORNING, WUnderland, from my "mixed" family to yours --

Day of Atonement (Yom Kippur)
Saturday, September 18, 2010

from www.catholic.com
Minor or venial sins can be confessed directly to God
...


Lol good afternoon, I'll work on that
Member Since: 28.06.2006 Posts: 24 Comments: 8185
1457. AwakeInMaryland
27. tammikuuta 2010 klo 17:01 (GMT)
GOOD MORNING, WUnderland, from my "mixed" family to yours --

Day of Atonement (Yom Kippur)
Saturday, September 18, 2010

from www.catholic.com
Minor or venial sins can be confessed directly to God...
Member Since: 19.08.2008 Posts: 32 Comments: 1918
1456. tornadodude
27. tammikuuta 2010 klo 17:00 (GMT)
Quoting atmoaggie:

Re: t-dude's post, hopefully, maturity begets maturity...

Well done, my boy.


thanks,

I was just sick of it, and I know many others were as well
Member Since: 28.06.2006 Posts: 24 Comments: 8185
1455. pastagirl
27. tammikuuta 2010 klo 16:59 (GMT)
Thanks for 1440 TampaSpin!

I've been looking for some news concerning the amount of snow that expected in VA this weekend.
Member Since: 2.07.2006 Posts: 0 Comments: 13
1453. PcolaDan
27. tammikuuta 2010 klo 16:55 (GMT)
Quoting Bordonaro:


I know you're enjoy the show here on the blog. Popcorn looks good!


Yep, easily amused.
Member Since: 22.08.2008 Posts: 12 Comments: 6010
1452. atmoaggie
27. tammikuuta 2010 klo 16:55 (GMT)
Quoting PcolaDan:



Re: t-dude's post, hopefully, maturity begets maturity...

Well done, my boy.
Member Since: 16.08.2007 Posts: 6 Comments: 12461
1451. Patrap
27. tammikuuta 2010 klo 16:54 (GMT)
01/27/2010
GETTING MORE HELP

A search and rescue corpsman and U.S. Navy Lt Cmdr. Robert Propes carry a 7-year-old Haitian boy from a Sea Hawk helicopter for medical evaluation at Terminal Varreux, Port-au-Prince, Haiti, Jan. 25, 2010. The station opened recently as a medical gateway for Haitians to gain access to medical treatments aboard naval vessels at anchor in port. Propes is a medical officer from the Military Sealift Command hospital ship USNS Comfort. U.S. Navy photo by Petty Officer 3rd Class Timothy Wilson





5,000-Bed Hospital to Increase Haitian Medical Capacity

By John J. Kruzel
American Forces Press Service
WASHINGTON, Jan. 26, 2010. International relief workers in Haiti are developing a 5,000-bed hospital in the capital of Port-au-Prince to increase medical capacity as the country struggles to recover two weeks after a devastating earthquake struck.

Among other facilities, the hospital will accept patients from the floating hospital ship USNS Comfort, where more than 100 surgeries have been performed since arriving at the Haitian coast last week.

Though still some weeks away from becoming fully operational, U.S. medical equipment that will outfit the additional hospital in northern Port-au-Prince has begun to arrive, Army Lt. Gen. P.K. Keen, the top U.S. commander in Haiti, told Pentagon reporters today.

We are anticipating to at least get the seeds of that hospital up within the next week or so, but that we'll begin small and then grow from there, Keen said via teleconference from Haiti. We are hoping to be able to at least start with a 250-man centerpiece.

Haitian authorities have said more than 150,000 bodies have been buried in Haiti since a magnitude 7 earthquake devastated the country Jan. 12. Original estimates by the Red Cross were that upwards of 3 million Haitians were affected.

International aid continues pouring into Haiti in the midst of what an official called one of the greatest humanitarian emergencies in the history of the Americas. Among those assets is the USNS Comfort, on which U.S. medical personnel has taken aboard nearly 400 patients, performed more than 100 surgeries and filled more than 11,800 prescriptions since its Jan. 20 arrival.

Keen said the Haitian government quickly granted a request for a large piece of land -- situated near the hospital ship and also accessible by road -- that could host the 5,000-bed hospital. A principal source of the incoming patients will come from the Comfort, he added.

We want to continue to see a flow of patients that need that critical care that the Comfort offers, and then take patients off of her that do not need that any longer, in order to maximize the utility of the Comfort, Keen said.

The general said nongovernment organizations are determining who will man the hospital once it opens its doors to patients, with the United States playing the role of advisors and assistants in what Keen characterized as a joint venture.

[The organizations] are responding, in terms of being able to manage the hospital and in being able to staff the hospital, he said. We are enabling that by working with the international community to procure tinnage and all the things that you can imagine you need in order to build a hospital of that magnitude.
Member Since: 3.07.2005 Posts: 415 Comments: 125715
1450. drg0dOwnCountry
27. tammikuuta 2010 klo 16:53 (GMT)
Quoting tornadodude:
Alright,

This message has been long overdue.

To Jeff Masters and the entire blog:

Over the past couple of days, I have immaturely engaged in several debates that have resulted in many personal attacks that were uncalled for. Never is it okay for me or anyone to combat an argument with an attack on someone. For that, I am sorry. I have been a big part in disrupting the blog, and I have not responsibly upheld the standards that are set in the rules. I specifically owe an apology to JFLORIDA and drg0dOwnCountry. I do disagree with your arguments for the most part, but never should I have let that become personal. I am sorry. This blog is a wonderful place to learn many things about the weather and the climate, and if we want it to continue to be so, then we are all going to have to stop the immature bull around here. This blog has been key to getting Portlight rolling in a major way, and if we continue to act in this manner that we have displayed lately, many people who come to check out the site will turn away. I am as guilty as anyone of this.

again, wunderground community,

I'm sorry,

Matt
You surprise me again. Apology accepted.
Member Since: 22.09.2005 Posts: 11 Comments: 2032
1449. PcolaDan
27. tammikuuta 2010 klo 16:52 (GMT)
Quoting tornadodude:


Member Since: 22.08.2008 Posts: 12 Comments: 6010
1448. tornadodude
27. tammikuuta 2010 klo 16:52 (GMT)
Quoting Bordonaro:


I know you're enjoy the show here on the blog. Popcorn looks good!


thanks Bob :P

and on that note, finally time for lunch :)
Member Since: 28.06.2006 Posts: 24 Comments: 8185
1447. Bordonaro
27. tammikuuta 2010 klo 16:52 (GMT)
Quoting PcolaDan:






I know you're enjoy the show here on the blog. Popcorn looks good!
Member Since: 25.08.2009 Posts: 20 Comments: 6785
1446. atmoaggie
27. tammikuuta 2010 klo 16:52 (GMT)
Quoting McBill:

Well, it took me a little while to go through this paper and realize that it did not at all address your assertion, namely:

"Most of the stations that show no warming are rural ones, if that is what you are asking. Which takes away from the CO2-forcing argument, actually, as CO2 is a well-distributed gas and should have the same effect at rural stations as urban/suburban stations.

But that wasn't the point. Point was, there are a lot of stations that do not show any warming, as opposed to Astro's thought on the matter."


I'm guessing that you didn't think I'd bother to take the time to pull the paper and read it.

So, can you provide any references that actually support your claims? And maybe hold the snark this time.


Oh, that shows a lot of good information about the limitations and land use effects.

Here are some others that do a little more, with respect to the urban vs. rural effect:

Impact of urbanization and land-use change on climate
http://www.nature.com/nature/journal/v423/n6939/full/nature01675.html

Urbanization Effects on Observed Surface Air Temperature Trends in North China
http://ams.allenpress.com/perlserv/?request=get-abstract&doi=10.1175%2F2007JCLI1348.1

Quantifying the influence of anthropogenic surface processes and inhomogeneities on gridded global climate data
http://www.webcommentary.com/docs/rrm-pjm-1207.pdf


Impacts of land use land cover on temperature trends over the continental United States: assessment using the North American Regional Reanalysis
https://dods.atmos.umd.edu/~ekalnay/FalletalLULCoverUS2009.pdf
(I will admit that I am rereading this last one when I get the chance...)

As to my original statement "Most of the stations that show no warming at all are rural ones", well, I cannot sit in here and post hundreds of data plots from rural stations. I suggest spending a day at the GISS site, caveats about their methods and the GHCN raw data aside.

Here is a tiny sample of such in a blog: http://www.appinsys.com/GlobalWarming/GW_Part3_UrbanHeat.htm

And in the other direction:

Assessment of Urban Versus Rural In Situ Surface Temperatures in the Contiguous United States: No Difference Found
http://ams.allenpress.com/perlserv/?request=get-abstract&doi=10.1175%2F1520-0442(2003)0162941:AO UVRI2.0.CO%3B2

There are many more of both flavors, of course.
Member Since: 16.08.2007 Posts: 6 Comments: 12461
1445. Bordonaro
27. tammikuuta 2010 klo 16:49 (GMT)
T Dude, no problem, we'll flog you later :0)
Member Since: 25.08.2009 Posts: 20 Comments: 6785
1444. Bordonaro
27. tammikuuta 2010 klo 16:47 (GMT)
Quoting tornadodude:

Winter Storm Watch

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE FORT WORTH TX
424 AM CST WED JAN 27 2010

...WINTER STORM WATCH FOR PORTIONS OF NORTH TEXAS...

.A STRONG UPPER LEVEL LOW PRESSURE SYSTEM IS EXPECTED TO MOVE
NORTHEAST ACROSS NORTH TEXAS LATE ON THURSDAY. THIS SYSTEM WILL
BRING WIDESPREAD RAINFALL OVER ALL OF NORTH TEXAS. AS IT MOVES
NORTHEAST THURSDAY NIGHT A COLD POLAR AIRMASS WILL UNDERCUT THE
RAINFALL FROM NORTHWEST TO SOUTHEAST. THIS WILL CAUSE NEAR SURFACE
TEMPERATURES TO DIP BELOW FREEZING WHILE RAIN CONTINUES TO FALL
ALLOWING ICE TO ACCUMULATE ON ELEVATED SURFACES. AS THE COLD AIR
CONTINUES TO FILTER INTO THE REGION LIQUID ON THE GROUND WILL
FREEZE AND FALLING PRECIPITATION MAY CHANGEOVER TO SLEET OR SNOW.

TXZ091-092-100>102-115-116-271830-
/O.NEW.KFWD.WS.A.0001.100129T0200Z-100130T0000Z/
MONTAGUE-COOKE-YOUNG-JACK-WISE-STEPHENS-PALO PINTO-
INCLUDING THE CITIES OF...BOWIE...NOCONA...GAINESVILLE...GRAHAM...
OLNEY...JACKSBORO...DECATUR...BRIDGEPORT...BRECKENRIDGE...
MINERAL WELLS
424 AM CST WED JAN 27 2010

...WINTER STORM WATCH IN EFFECT FROM THURSDAY EVENING THROUGH
FRIDAY AFTERNOON...

THE NATIONAL WEATHER SERVICE IN FORT WORTH HAS ISSUED A WINTER
STORM WATCH FOR SIGNIFICANT ICING...WHICH IS IN EFFECT FROM
THURSDAY EVENING THROUGH FRIDAY AFTERNOON.

WIDESPREAD RAINFALL IS EXPECTED TO BE UNDERCUT BY A STRONG POLAR
AIRMASS LATE THURSDAY EVENING. THIS WILL BRING SURFACE
TEMPERATURES BELOW FREEZING AS RAIN CONTINUES TO FALL ALLOWING FOR
THE ACCUMULATION OF ICE INITIALLY ON ELEVATED SURFACES AND
POWER LINES. AS COLDER AIR CONTINUES TO MOVE INTO THE REGION ICE
MAY ALSO ACCUMULATE ON ROADWAYS IN CONTACT WITH THE GROUND.
PRECIPITATION WILL BEGIN TO DIMINISH IN INTENSITY AS THE COLDER
AIR MOVES INTO NORTH TEXAS FROM NORTHWEST TO SOUTHEAST THURSDAY
NIGHT. AREAS THAT WILL LIKELY SEE SIGNIFICANT ICING LOOK TO BE
ALONG AND NORTHWEST OF A MINERAL WELLS TO GAINESVILLE LINE AT
THIS TIME. THESE AREAS MAY SEE UP TO A QUARTER INCH OF ICE
ACCUMULATION ON ELEVATED ROADWAYS AND POWER LINES BEFORE
PRECIPITATION DIMINISHES TO FREEZING DRIZZLE FRIDAY MORNING.

WITH NORTH WINDS FORECAST TO BE AT 10 TO 20 MPH...SOME DAMAGE TO
POWER LINES IS POSSIBLE WITHIN THE WATCH AREA. AREA ROADWAYS ARE
ALSO EXPECTED TO BECOME ICY...ESPECIALLY ON BRIDGES AND
OVERPASSES. STAY TUNED TO NOAA WEATHER RADIO OR OTHER MEDIA
OUTLETS FOR THE LATEST INFORMATION REGARDING THIS POTENTIAL WINTER
STORM.



Member Since: 25.08.2009 Posts: 20 Comments: 6785
1443. tornadodude
27. tammikuuta 2010 klo 16:46 (GMT)
Alright,

This message has been long overdue.

To Jeff Masters and the entire blog:

Over the past couple of days, I have immaturely engaged in several debates that have resulted in many personal attacks that were uncalled for. Never is it okay for me or anyone to combat an argument with an attack on someone. For that, I am sorry. I have been a big part in disrupting the blog, and I have not responsibly upheld the standards that are set in the rules. I specifically owe an apology to JFLORIDA and drg0dOwnCountry. I do disagree with your arguments for the most part, but never should I have let that become personal. I am sorry. This blog is a wonderful place to learn many things about the weather and the climate, and if we want it to continue to be so, then we are all going to have to stop the immature bull around here. This blog has been key to getting Portlight rolling in a major way, and if we continue to act in this manner that we have displayed lately, many people who come to check out the site will turn away. I am as guilty as anyone of this.

again, wunderground community,

I'm sorry,

Matt
Member Since: 28.06.2006 Posts: 24 Comments: 8185
1442. Bordonaro
27. tammikuuta 2010 klo 16:45 (GMT)
Quoting gregpinehurstnc:
hello. just wondering where bordnaro is, lookin for some input into the upcoming winter storm for nc..


Good Morning, I am here, I will post a link below from Allan Hoffman, meteorologist out of Raleigh, NC and his morning blog article, enjoy :0)

Link
Member Since: 25.08.2009 Posts: 20 Comments: 6785
1441. nrtiwlnvragn
27. tammikuuta 2010 klo 16:40 (GMT)
GOES-13 Status Update


***GOES-13 is scheduled to replace GOES-12 as the GOES-East operational
spacecraft on April 14, 2010***
The exact time to be determined, but likely in the 1800-1900Z time
frame.

This message is to provide information on a planned transition from
GOES-12 to GOES-13 as the operational GOES-East spacecraft. ***GOES-13
is scheduled to replace GOES-12 as the GOES-East operational spacecraft
on April 14, 2010***. GOES-13, launched on May 24, 2006, is the first
in the series of GOES-N satellites (GOES-14 was launched on June 27,
2009 and GOES-P is scheduled to be launched no earlier than March 1,
2010). This series will carry the 5 channel imager and 19 channel
sounder similar to the GOES-I through M series, with some differences.
GOES-13 carried the same imager and sounder payload as GOES-12, but the
new spacecraft bus will allow it to operate through eclipse and
keep out zone periods and images will have increased navigation, registration and radiometric accuracy.
Member Since: 23.09.2005 Posts: 13 Comments: 10471
1440. TampaSpin
27. tammikuuta 2010 klo 16:37 (GMT)
This is one big storm coming into the Tennessee Valley region and then into the North Carolina area......could be a lot of ice and freezing rain....which means no POWER FOR DAYS possibly......be prepared for such an event.



Member Since: 2.09.2007 Posts: 177 Comments: 20430
1439. gregpinehurstnc
27. tammikuuta 2010 klo 16:35 (GMT)
hello. just wondering where bordnaro is, lookin for some input into the upcoming winter storm for nc..
Member Since: 18.08.2008 Posts: 0 Comments: 88
1438. tornadodude
27. tammikuuta 2010 klo 16:33 (GMT)
Lafayette, Purdue University Airport
Lat: 40.43 Lon: -86.93 Elev: 623
Last Update on Jan 27, 10:54 am EST

Mostly Cloudy

21 °F
(-6 °C)
Humidity: 65 %
Wind Speed: W 8 MPH
Barometer: 30.25" (1025.3 mb)
Dewpoint: 11 °F (-12 °C)
Wind Chill: 11 °F (-12 °C)
Visibility: 10.00 mi.

I am supposed to get an inch of snow tonight
Member Since: 28.06.2006 Posts: 24 Comments: 8185
1436. tornadodude
27. tammikuuta 2010 klo 16:32 (GMT)

Winter Storm Watch

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE FORT WORTH TX
424 AM CST WED JAN 27 2010

...WINTER STORM WATCH FOR PORTIONS OF NORTH TEXAS...

.A STRONG UPPER LEVEL LOW PRESSURE SYSTEM IS EXPECTED TO MOVE
NORTHEAST ACROSS NORTH TEXAS LATE ON THURSDAY. THIS SYSTEM WILL
BRING WIDESPREAD RAINFALL OVER ALL OF NORTH TEXAS. AS IT MOVES
NORTHEAST THURSDAY NIGHT A COLD POLAR AIRMASS WILL UNDERCUT THE
RAINFALL FROM NORTHWEST TO SOUTHEAST. THIS WILL CAUSE NEAR SURFACE
TEMPERATURES TO DIP BELOW FREEZING WHILE RAIN CONTINUES TO FALL
ALLOWING ICE TO ACCUMULATE ON ELEVATED SURFACES. AS THE COLD AIR
CONTINUES TO FILTER INTO THE REGION LIQUID ON THE GROUND WILL
FREEZE AND FALLING PRECIPITATION MAY CHANGEOVER TO SLEET OR SNOW.

TXZ091-092-100>102-115-116-271830-
/O.NEW.KFWD.WS.A.0001.100129T0200Z-100130T0000Z/
MONTAGUE-COOKE-YOUNG-JACK-WISE-STEPHENS-PALO PINTO-
INCLUDING THE CITIES OF...BOWIE...NOCONA...GAINESVILLE...GRAHAM...
OLNEY...JACKSBORO...DECATUR...BRIDGEPORT...BRECKENRIDGE...
MINERAL WELLS
424 AM CST WED JAN 27 2010

...WINTER STORM WATCH IN EFFECT FROM THURSDAY EVENING THROUGH
FRIDAY AFTERNOON...

THE NATIONAL WEATHER SERVICE IN FORT WORTH HAS ISSUED A WINTER
STORM WATCH FOR SIGNIFICANT ICING...WHICH IS IN EFFECT FROM
THURSDAY EVENING THROUGH FRIDAY AFTERNOON.

WIDESPREAD RAINFALL IS EXPECTED TO BE UNDERCUT BY A STRONG POLAR
AIRMASS LATE THURSDAY EVENING. THIS WILL BRING SURFACE
TEMPERATURES BELOW FREEZING AS RAIN CONTINUES TO FALL ALLOWING FOR
THE ACCUMULATION OF ICE INITIALLY ON ELEVATED SURFACES AND
POWER LINES. AS COLDER AIR CONTINUES TO MOVE INTO THE REGION ICE
MAY ALSO ACCUMULATE ON ROADWAYS IN CONTACT WITH THE GROUND.
PRECIPITATION WILL BEGIN TO DIMINISH IN INTENSITY AS THE COLDER
AIR MOVES INTO NORTH TEXAS FROM NORTHWEST TO SOUTHEAST THURSDAY
NIGHT. AREAS THAT WILL LIKELY SEE SIGNIFICANT ICING LOOK TO BE
ALONG AND NORTHWEST OF A MINERAL WELLS TO GAINESVILLE LINE AT
THIS TIME. THESE AREAS MAY SEE UP TO A QUARTER INCH OF ICE
ACCUMULATION ON ELEVATED ROADWAYS AND POWER LINES BEFORE
PRECIPITATION DIMINISHES TO FREEZING DRIZZLE FRIDAY MORNING.

WITH NORTH WINDS FORECAST TO BE AT 10 TO 20 MPH...SOME DAMAGE TO
POWER LINES IS POSSIBLE WITHIN THE WATCH AREA. AREA ROADWAYS ARE
ALSO EXPECTED TO BECOME ICY...ESPECIALLY ON BRIDGES AND
OVERPASSES. STAY TUNED TO NOAA WEATHER RADIO OR OTHER MEDIA
OUTLETS FOR THE LATEST INFORMATION REGARDING THIS POTENTIAL WINTER
STORM.

Member Since: 28.06.2006 Posts: 24 Comments: 8185
1435. TampaSpin
27. tammikuuta 2010 klo 16:31 (GMT)
1431. Floodman 11:26 AM EST on January 27, 2010

ARe you in Taxas now! Looks like some snow heading that direction again.
Member Since: 2.09.2007 Posts: 177 Comments: 20430
1434. drg0dOwnCountry
27. tammikuuta 2010 klo 16:30 (GMT)
In response to atmoaggie's post McBill just pointed out something crucial. And once again this comes with no surprise.


McBill posted


Well, it took me a little while to go through this paper and realize that it did not at all address your assertion, namely:

"Most of the stations that show no warming are rural ones, if that is what you are asking. Which takes away from the CO2-forcing argument, actually, as CO2 is a well-distributed gas and should have the same effect at rural stations as urban/suburban stations.

But that wasn't the point. Point was, there are a lot of stations that do not show any warming, as opposed to Astro's thought on the matter."

I'm guessing that you didn't think I'd bother to take the time to pull the paper and read it.

So, can you provide any references that actually support your claims? And maybe hold the snark this time.

Member Since: 22.09.2005 Posts: 11 Comments: 2032
1433. tornadodude
27. tammikuuta 2010 klo 16:29 (GMT)
Quoting drg0dOwnCountry:
That we agree! There is still hope for the other topics ;)
I guess we cover those later tornadodude.


I was surprised as well. but hey, we will get to those another time. thanks :)
Member Since: 28.06.2006 Posts: 24 Comments: 8185
1432. drg0dOwnCountry
27. tammikuuta 2010 klo 16:27 (GMT)
Quoting tornadodude:


just curious, but why are you surprised?
That we agree! There is still hope for the opther topics ;)
I guess we cover those later tornadodude.
Member Since: 22.09.2005 Posts: 11 Comments: 2032
1431. Floodman
27. tammikuuta 2010 klo 16:26 (GMT)
Quoting atmoaggie:
1418: Too much, lay off it. At some point, you guys will approach hypocrisy...


Well past it already...as much as I would hate to cut off half of the discussion, the ridiculous nature of some of the posts are really leaving me with no choice...
Member Since: 2.08.2006 Posts: 10 Comments: 9922
1429. tornadodude
27. tammikuuta 2010 klo 16:22 (GMT)
Quoting drg0dOwnCountry:
Actualy i'm surprised that you state this. Thanks and i have to agree.


just curious, but why are you surprised?
Member Since: 28.06.2006 Posts: 24 Comments: 8185

Viewing: 1479 - 1429

Page: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30Blog Index

Top of Page

About

Jeff co-founded the Weather Underground in 1995 while working on his Ph.D. He flew with the NOAA Hurricane Hunters from 1986-1990.

Local Weather

Clear
46 °F
Selkeää