Vortex2 tornado study finally gets some twisters to study

By: Dr. Jeff Masters , 8. kesäkuuta 2009 klo 13:56 (GMT)

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A proven way to reduce the incidence of dangerous weather phenomena is to schedule a multi-million dollar field experiment to study the phenomena. Up until this past weekend, that has certainly been true of this year's $10 million Vortex2 tornado study. The 7-week study (which also runs next year) has deployed an armada of over 100 storm chasing vehicles across the Great Plains this Spring, but has largely been frustrated by an exceptionally quiet tornado season. Tornado activity in May was less than half of what was observed last year in May, thanks to a ridge of high pressure that has dominated the weather. The residents of Tornado Alley ran out of luck over the weekend, though, as a strong low pressure system and associated cold front brought severe weather and multiple tornadoes to the region. Sixteen tornado reports were received by NOAA's Storm Prediction Center yesterday, and three on Friday. The team of University of Michigan students that has been writing our featured Vortex2 blog caught some excellent pictures of tornadoes on both Friday and Sunday. Yesterday was probably the last best chance for the Vortex2 project to document a strong tornado, since the project ends this Saturday and no significant tornado outbreaks appear likely for the remainder of this week.

Aurora, Colorado tornado yesterday
A tornado with a 3/4 mile wide debris cloud swept through Aurora, Colorado yesterday, staying on the ground for 8 - 11 miles and damaging a shopping mall, but causing no deaths or injuries. The tornado passed close to one of the high-resolution Terminal Doppler Weather Radars (TDWRs) that we now feature on our web site (see the radar FAQ for more details on these great new additions to our radar offerings). Posted below are the reflectivity and Doppler velocity images from the tornado, showing the amazing fine-scale details these high-resolution radars offer.



Figure 1. Radar reflectivity (top) and Doppler velocity (bottom) from the Denver, Colorado Terminal Doppler Weather Radar (TDWR), which caught the classic signature of a supercell thunderstorm tornado over Aurora, Colorado. A tornado dropped down from the low-level mesocyclone inside the parent supercell thunderstorm at the time of these images. Yellow colors located right next to greens/blues indicate that winds are moving towards and away from the radar in close proximity, the signature of strong rotation at low levels. Also visible on the plot are the winds spreading out from a downdraft on the rear side of the tornado. Black arrows denote the direction of wind flow. The dryline was bent back into a E-W orientation near Denver, creating an area of moisture convergence, which triggered thunderstorm formation.

Western Caribbean disturbance unlikely to develop this week
As area of disturbed weather over the Western Caribbean has brought rains of 2 - 3 inches over portions of Nicaragua and Honduras over the past few days. Wind shear is a high 20 - 30 knots over the disturbance, and no computer models are indicating that the disturbance will develop this week.

Jeff Masters, with help from wunderground's tornado expert, Dr. Rob Carver

Dying out after an official 24 minutes on the ground
Tornado (Fungus)
Tornado
Twisted (rrose1)
This was taken approximately 30 minutes after a brief tornado passed through South Hutchinson, KS tonight. The building is a bus manufacturing facility.
Twisted

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1737. kimoskee
10. kesäkuuta 2009 klo 16:45 (GMT)
what's the forecast for Kingston, Jamaica?
Is this rain going to hang around until the weekend?
Member Since: 17.08.2008 Posts: 0 Comments: 672
1736. CycloneOz
10. kesäkuuta 2009 klo 14:48 (GMT)
Quoting TampaSpin:
TampaSpins Tropical Update....stick my neck out

Named storm coming by June 19th! Link


That dry air mass is like a wall at Indy in the 1960's.

It's clobberin' time!
Member Since: 26.08.2006 Posts: 10 Comments: 3420
1735. TheCaneWhisperer
10. kesäkuuta 2009 klo 14:28 (GMT)


Click image for link
1734. nrtiwlnvragn
10. kesäkuuta 2009 klo 14:07 (GMT)
New Blog...and that saying about careful what you wish for...
Member Since: 23.09.2005 Posts: 13 Comments: 10471
1733. stoormfury
10. kesäkuuta 2009 klo 14:07 (GMT)
the ssts near the south american coast appears to br cooling somewhat while the MDR in the atlantic is showing signs of warming. is this the reason why the epac and wpac are slow in kicking off? or is it that were are reversing to a neutral/ weak el nino episode?
Member Since: 22.08.2006 Posts: 0 Comments: 2552
1732. TheCaneWhisperer
10. kesäkuuta 2009 klo 14:07 (GMT)
I sense a weakness in the Farce.

1731. IKE
10. kesäkuuta 2009 klo 14:07 (GMT)
NEW BLOG!
Member Since: 9.06.2005 Posts: 23 Comments: 37858
1730. 0741
10. kesäkuuta 2009 klo 14:07 (GMT)
why their low on map were their nothing in sw carribbean shear very high??
1729. SavannahStorm
10. kesäkuuta 2009 klo 14:07 (GMT)
new blog
Member Since: 22.09.2005 Posts: 18 Comments: 2229
1728. gator23
10. kesäkuuta 2009 klo 14:05 (GMT)
Quoting TampaSpin:
TampaSpins Tropical Update....stick my neck out

Named storm coming by June 19th! Link


Tampa, I have never been to your blog until today. I was very impressed. Its a wealth of information. Please keep up the excellent work!
Member Since: 26.08.2008 Posts: 0 Comments: 2162
1727. SavannahStorm
10. kesäkuuta 2009 klo 14:03 (GMT)
WIPEOUT
Time to catch a wave

Member Since: 22.09.2005 Posts: 18 Comments: 2229
1726. Patrap
10. kesäkuuta 2009 klo 13:59 (GMT)


Baby you've been gone so Long..
Member Since: 3.07.2005 Posts: 415 Comments: 125699
1725. TampaSpin
10. kesäkuuta 2009 klo 13:57 (GMT)
TampaSpins Tropical Update....stick my neck out

Named storm coming by June 19th! Link
Member Since: 2.09.2007 Posts: 177 Comments: 20430
1723. tornadofan
10. kesäkuuta 2009 klo 13:52 (GMT)
Boring - maybe climate change would be better?

Naah.
Member Since: 5.04.2007 Posts: 83 Comments: 12345
1722. gator23
10. kesäkuuta 2009 klo 13:52 (GMT)
Quoting CybrTeddy:


5 bucks that 5 other bloogers will declare that blogger a wishcaster.


I am a wishcaster
Member Since: 26.08.2008 Posts: 0 Comments: 2162
1721. gator23
10. kesäkuuta 2009 klo 13:51 (GMT)
Quoting jeffs713:
5 bucks says that at least 1 blogger will declare the Columbian low on nrtiwlnvragn's post as "proof" that the AOI in the western Caribbean is actually trying to develop.


The Low in Columbia is proof that the AOI is trying to develop. I Owe you 5 bucks.
Member Since: 26.08.2008 Posts: 0 Comments: 2162
1720. CybrTeddy
10. kesäkuuta 2009 klo 13:49 (GMT)
Quoting jeffs713:
5 bucks says that at least 1 blogger will declare the Columbian low on nrtiwlnvragn's post as "proof" that the AOI in the western Caribbean is actually trying to develop.


5 bucks that 5 other bloogers will declare that blogger a wishcaster.
Member Since: 8.07.2005 Posts: 259 Comments: 23015
1719. scottsvb
10. kesäkuuta 2009 klo 13:43 (GMT)
Quoting jeffs713:
5 bucks says that at least 1 blogger will declare the Columbian low on nrtiwlnvragn's post as "proof" that the AOI in the western Caribbean is actually trying to develop.


Well Here comes out low off of Columbia... lol jk!!!!
Member Since: 22.01.2006 Posts: 0 Comments: 1516
1718. jeffs713
10. kesäkuuta 2009 klo 13:40 (GMT)
5 bucks says that at least 1 blogger will declare the Columbian low on nrtiwlnvragn's post as "proof" that the AOI in the western Caribbean is actually trying to develop.
Member Since: 3.08.2008 Posts: 16 Comments: 5793
1717. nrtiwlnvragn
10. kesäkuuta 2009 klo 13:35 (GMT)
12Z Surface Analysis


Click on image to view original size in a new window



Member Since: 23.09.2005 Posts: 13 Comments: 10471
1716. IKE
10. kesäkuuta 2009 klo 13:33 (GMT)
Quoting TheCaneWhisperer:


I think this area has been willed to death, literally, lol.


I do too. Like an energizer bunny...just keeps going and going......
Member Since: 9.06.2005 Posts: 23 Comments: 37858
1715. RitaEvac
10. kesäkuuta 2009 klo 13:33 (GMT)
.
Member Since: 14.07.2008 Posts: 1 Comments: 9625
1714. TheCaneWhisperer
10. kesäkuuta 2009 klo 13:32 (GMT)
Quoting WxLogic:


You know what they say... if there's a will there's a way.


I think this area has been willed to death, literally, lol.
1713. jeffs713
10. kesäkuuta 2009 klo 13:32 (GMT)
Quoting IKE:


OMG...please Dr. M, spare us the GW debate.


Hey! Some of us need entertainment to distract us from work!
Member Since: 3.08.2008 Posts: 16 Comments: 5793
1712. IKE
10. kesäkuuta 2009 klo 13:30 (GMT)
Quoting Orcasystems:


We are in desperate need of a new Blog :(
Its getting so slow.. he might even mention GW just to Heat things up a bit (pun intended).


OMG...please Dr. M, spare us the GW debate.

Member Since: 9.06.2005 Posts: 23 Comments: 37858
1711. CycloneOz
10. kesäkuuta 2009 klo 13:28 (GMT)
Puddle skippers at play shoo away bright birds that drank deeply. The high desert air softens.

It rains without lightning, a sky-fed stream without thunder.

Mountain morning comfort and contentment.



Member Since: 26.08.2006 Posts: 10 Comments: 3420
1710. weathermanwannabe
10. kesäkuuta 2009 klo 13:28 (GMT)
Quoting Tazmanian:
has any one noteded that the W Pac and E pac been slow starters this year



starting to look more like 1965!


K-Man mentioned it yesterday.....With all of the pent up heat that will continue to build around the Gulf region with high pressure dominating right now and no relief in sight in the short term, something will probably "pop" once the sheer dies down.......I don't like "late" starts to the season because some of the initial storms can become pretty strong because of the heat buildup before upwelling becomes a factor after a few storms in the basin....But then again, it's only June.
Member Since: 8.08.2006 Posts: 0 Comments: 8308
1709. 69Viking
10. kesäkuuta 2009 klo 13:27 (GMT)
Quoting Orcasystems:


When both numbers are in the 90's, that can't be to comfortable?
And who drinks flavoured coffee first thing in the morning?


Yep we've finally dried out and here comes the summer heat! No doubt this week will push the GOM water temperature up a bit. Hopefully shear continues to rule the day and keep anything from forming! Good morning everyone, nice and quiet tropics, just the way I like to see it!
Member Since: 25.08.2006 Posts: 1 Comments: 2996
1708. WxLogic
10. kesäkuuta 2009 klo 13:24 (GMT)
Morning...
Member Since: 14.08.2008 Posts: 4 Comments: 4881
1707. WxLogic
10. kesäkuuta 2009 klo 13:24 (GMT)
Quoting TheCaneWhisperer:
The NHC thinks it will find a weakness.



You know what they say... if there's a will there's a way.
Member Since: 14.08.2008 Posts: 4 Comments: 4881
1706. CybrTeddy
10. kesäkuuta 2009 klo 13:24 (GMT)
Quoting Weather456:
Taz, yea, they are slow to start especially the WPAC


So, both the EPAC and the WPAC are below average were as the Atlantic is above?
Member Since: 8.07.2005 Posts: 259 Comments: 23015
1705. Orcasystems
10. kesäkuuta 2009 klo 13:23 (GMT)
Quoting IKE:


LOL!


:(


We are in desperate need of a new Blog :(
Its getting so slow.. he might even mention GW just to Heat things up a bit (pun intended).
Member Since: 1.10.2007 Posts: 81 Comments: 26493
1704. 2010hurricane
10. kesäkuuta 2009 klo 13:22 (GMT)
Quoting Weather456:
Taz, yea, they are slow to start especially the WPAC




I Know!!
Member Since: 8.06.2009 Posts: 0 Comments: 82
1703. Cavin Rawlins
10. kesäkuuta 2009 klo 13:18 (GMT)
Taz, yea, they are slow to start especially the WPAC
Member Since: 24.07.2005 Posts: 407 Comments: 19076
1702. CycloneOz
10. kesäkuuta 2009 klo 13:17 (GMT)
Bees are a buzz amongst the wildflowers that sing a new day with color. Rain moistened life, a steady pour has made green greener. The sounds of rejoicing fill the misty air.



Member Since: 26.08.2006 Posts: 10 Comments: 3420
1701. IKE
10. kesäkuuta 2009 klo 13:16 (GMT)
Quoting Orcasystems:


You are 50+ remember.. its to be expected


LOL!


:(
Member Since: 9.06.2005 Posts: 23 Comments: 37858
1700. Orcasystems
10. kesäkuuta 2009 klo 13:10 (GMT)
Quoting IKE:


Good lord I'm going blind.


You are 50+ remember.. its to be expected
Member Since: 1.10.2007 Posts: 81 Comments: 26493
1699. IKE
10. kesäkuuta 2009 klo 13:05 (GMT)
Quoting Orcasystems:


Its in AOI#1 , but its pretty small isn't it?


Good lord I'm going blind.
Member Since: 9.06.2005 Posts: 23 Comments: 37858
1698. Orcasystems
10. kesäkuuta 2009 klo 13:00 (GMT)
Quoting IKE:


I see one between eastern Cuba, SW, to SW of Jamaica....


Its in AOI#1 , but its pretty small isn't it?
Member Since: 1.10.2007 Posts: 81 Comments: 26493
1697. TheCaneWhisperer
10. kesäkuuta 2009 klo 12:57 (GMT)
The NHC thinks it will find a weakness.

1696. Tazmanian
10. kesäkuuta 2009 klo 12:54 (GMT)
has any one noteded that the W Pac and E pac been slow starters this year



starting to look more like 1965!
Member Since: 21.05.2006 Posts: 5089 Comments: 114072
1695. IKE
10. kesäkuuta 2009 klo 12:51 (GMT)
Quoting Orcasystems:
Blog Update
Reflector site for those at work, which now also includes Weather456, daily updates


AOI #1

AOI #2



It was not easy trying to find two AOI's this morning :(


I see one between eastern Cuba, SW, to SW of Jamaica....
Member Since: 9.06.2005 Posts: 23 Comments: 37858
1694. Orcasystems
10. kesäkuuta 2009 klo 12:43 (GMT)
Blog Update
Reflector site for those at work, which now also includes Weather456, daily updates


AOI #1

AOI #2



It was not easy trying to find two AOI's this morning :(
Member Since: 1.10.2007 Posts: 81 Comments: 26493
1693. Orcasystems
10. kesäkuuta 2009 klo 12:36 (GMT)
Quoting RTLSNK:


Morning Big Fish, not a problem, have 36 sprinkler heads and a little princess granddaughter, have you forgotten how much fun running through the sprinklers can be? Sugar Bear likes flavoured coffee in the morning, when she is happy, grandpa is happy. :)


Both valid points... I never thought of it that way :)
Member Since: 1.10.2007 Posts: 81 Comments: 26493
1692. RTLSNK
10. kesäkuuta 2009 klo 12:34 (GMT)
Quoting Orcasystems:


When both numbers are in the 90's, that can't be to comfortable?
And who drinks flavoured coffee first thing in the morning?


Morning Big Fish, not a problem, have 36 sprinkler heads and a little princess granddaughter, have you forgotten how much fun running through the sprinklers can be? Sugar Bear likes flavoured coffee in the morning, when she is happy, grandpa is happy. :)
Member Since: 3.09.2008 Posts: 0 Comments: 19562
1691. CycloneOz
10. kesäkuuta 2009 klo 12:32 (GMT)
Through the night came the rains, soaking all things to be seen in the dim morning light.

Life in the mountains, revitalized.

One stares and wonders at nature's magnificence!

Member Since: 26.08.2006 Posts: 10 Comments: 3420
1690. weathermanwannabe
10. kesäkuuta 2009 klo 12:25 (GMT)
Good Morning....Shear rules in the Tropics and high pressure over North Florida which will result in highs around 95 for the next few days...Maybe a nice time to head down to the Tropics for a vacation where the water is warm and the drinks are cool.......
Member Since: 8.08.2006 Posts: 0 Comments: 8308
1689. Orcasystems
10. kesäkuuta 2009 klo 12:22 (GMT)
Quoting RTLSNK:
69*F in Macon, Georgia this morning headed up to 92*F, 94% humidity, wind is calm, sky is clear, coffee is French Roast. :)


When both numbers are in the 90's, that can't be to comfortable?
And who drinks flavoured coffee first thing in the morning?
Member Since: 1.10.2007 Posts: 81 Comments: 26493
1688. canesrule1
10. kesäkuuta 2009 klo 12:11 (GMT)
1687. RTLSNK
10. kesäkuuta 2009 klo 12:08 (GMT)
69*F in Macon, Georgia this morning headed up to 92*F, 94% humidity, wind is calm, sky is clear, coffee is French Roast. :)
Member Since: 3.09.2008 Posts: 0 Comments: 19562

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

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