Dr. Jeff Masters' WunderBlog

90L comes close to being the season's first named storm
Posted by: Dr. Jeff Masters, 23. toukokuuta 2009 klo 17:30 (GMT) +2
The large extratropical storm (90L) that has been pounding Florida, the Bahamas, and Haiti this week with heavy rain and high surf has moved ashore over Mississippi. Last night and this morning, the storm put on an impressive burst of heavy thunderstorm activity and came close to becoming a subtropical or tropical depression. Winds at the Fort Morgan, AL station were 44 mph, gusting to 52 mph, and winds at Dauphin Island, Alabama coastal station were sustained at 39 mph, gusting to 48 mph at between 8am and 10am EDT this morning. While these winds were in excess of the 39 mph threshold of tropical storm force, both measurements were taken at elevations higher than the international wind measurement standard of ten meters, so the top measured winds of 90L were actually slightly less than tropical storm force. Had 90L spent another six hours over water, it very likely would have been declared a tropical/subtropical depression/storm.

The circulation around 90L continues to mean rain for Florida, but the rains will be lessening today. Rainfall amounts as high as 28 inches were measured this week in Northern Florida at Brunnell. Rainfall amounts of 2 - 3 inches have accumulated along the Alabama, Mississippi, and Florida Panhandle coasts from 90L so far (Figure 1).


Figure 1. Estimated rainfall from the Mobile, AL radar.

There are no other threat areas in the Atlantic to discuss today, so have a great weekend, and I'll have a new blog post by Tuesday.

Jeff Masters
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702. Drakoen 25. toukokuuta 2009 klo 02:37 (GMT)    
Even though shear was 5-6m/s faster off the U.S. east coast for that period we still got slammed.
Member Since: 28.10.2006 Posts: 57 Comments: 29010
703. Drakoen 25. toukokuuta 2009 klo 02:37 (GMT)    
Quoting WeatherStudent:


Blue means high shear and red means low shear, Drak? Is this correct, my friend?


No. The opposite.
Member Since: 28.10.2006 Posts: 57 Comments: 29010
704. HadesGodWyvern 25. toukokuuta 2009 klo 02:37 (GMT)    
India Meteorological Department
Tropical Cyclone Warning Number TEN
CYCLONIC STORM AILA (BOB02-2009)
2:30 AM IST May 25 2009
===============================

Subject: Cyclone warning for West Bengal and north Orissa coasts. “Orange Message”

At 21:00 PM UTC, Cyclonic Storm Aila over northwest & adjoining central Bay of Bengal moved north-northwestwards and lay centred over northwest Bay of Bengal near 20.0N 88.0E, or about 140 kms east of Paradip, 180 kms south of Sagar Island and 300 kms southwest of Khepupara, Bangladesh.

Satellite imagery indicates bending feature system. Current Dvorak intensity of the system is T2.5. Associated broken intense to very intense convection observed over the Bay of Bengal between 14.5N to 22.0N and between 83.0E to 92.5E. The lowest cloud top temperature due to convection is about -70 to -80C around the system center.

3 minute sustained winds near the center is 40 knots with gusts of 50 knots and a central pressure of 984 hPa. The state of the sea is HIGH to VERY HIGH around the system's center.

Vertical wind shear of horizontal wind is between 10-15 knots around the center. The past 24 hours shear tendency is negative to the north of the system. The system lies close to the upper tropospheric ridge, which roughly runs along 20.0N in association with the anticyclonic circulation over Mynamar and adjoining north Bay of Bengal located to the east-northeast of the system. There is an upper tropospheric trough in westerlies west to the system. Sea surface temperature are warmer over north and central Bay of Bengal. Majority of NWP models also suggest intensification of the system and landfall over West Bengal and adjoining Bangladesh coast near 88.0E

Storm surge of a about 2-3 meters above astronomical tide is likely over coastal areas of West Bengal and adjoining Bangladesh coast at the time of landfall.

Considering all the above, the system is likely to intensify further and move in a near northerly direction and cross West Bengal-Bangladesh coast near 88.0E near Sagar Island between 0900 and 1200 PM tomorrow.


Forecast and Intensity
======================
Current: 20.0N 88.0E - 40 knots (Cyclonic Storm)
9 HRS: 21.5N 88.0E - 50-55 knots (SVR Cyclonic Storm)
15 HRS: 22.5M 88.0E - 45 knots (Overland/Cyclonic Storm)
Member Since: 24.05.2006 Posts: 43 Comments: 36686
706. Levi32 25. toukokuuta 2009 klo 02:40 (GMT)    
Quoting Drakoen:
Even though shear was 5-6m/s faster off the U.S. east coast for that period we still got slammed.


Yeah that was one wild year. This year may be the Carolinas turn to get a significant hurricane.
Member Since: 24.11.2005 Posts: 586 Comments: 25443
709. K8eCane 25. toukokuuta 2009 klo 02:43 (GMT)    
bite your tongue and hush your mouth
Member Since: 26.04.2006 Posts: 5 Comments: 2369
710. presslord 25. toukokuuta 2009 klo 02:46 (GMT)    
...bud...
Member Since: 13.08.2007 Posts: 0 Comments: 10377
711. HadesGodWyvern 25. toukokuuta 2009 klo 02:47 (GMT)    
IMD is in lag mode.. they must need better servers =P
Member Since: 24.05.2006 Posts: 43 Comments: 36686
712. RMM34667 25. toukokuuta 2009 klo 02:48 (GMT)    
Created my first blog entry tonight! Not related to weather, but I did it!
Member Since: 7.09.2006 Posts: 5 Comments: 910
713. CybrTeddy 25. toukokuuta 2009 klo 02:49 (GMT)    
Anyone else noticing how similar 2009 is shaping into 2004? Developing El Nino, shear models indicating almost the same shear as 2004, Bremuda High position (I think, I read it earlier so I may be wrong) I sure hope Im dead wrong. I want to be dead wrong. The horror I faced in 2003-2004-2005 is unmatched. Staring down a Category 5 in Virgina to next year staring down a RI Category 4/5 right off the West Florida coast to staring at the strongest Hurricane ever recorded in the Atlantic heading straight for you is unmatched horror.
Member Since: 8.07.2005 Posts: 253 Comments: 20228
714. cchsweatherman 25. toukokuuta 2009 klo 02:50 (GMT)    
Just went and downloaded Google Chrome to give it a test run and its so much faster than Internet Explorer and so much simpler to use. Think I'm going to stick with Google Chrome from now on since its going to make things so much easier.
Member Since: 14.04.2007 Posts: 8 Comments: 4926
716. Levi32 25. toukokuuta 2009 klo 02:53 (GMT)    
Quoting CybrTeddy:
Anyone else noticing how similar 2009 is shaping into 2004? Developing El Nino, shear models indicating almost the same shear as 2004, Bremuda High position (I think, I read it earlier so I may be wrong) I sure hope Im dead wrong. I want to be dead wrong.


Bermuda High is not setting up as far west as 2004. Whereas Florida was the prime target for systems north of the Caribbean in 2004, the Carolinas will be more at risk this year.
Member Since: 24.11.2005 Posts: 586 Comments: 25443
717. Levi32 25. toukokuuta 2009 klo 02:53 (GMT)    
Quoting cchsweatherman:
Just went and downloaded Google Chrome to give it a test run and its so much faster than Internet Explorer and so much simpler to use. Think I'm going to stick with Google Chrome from now on since its going to make things so much easier.


Yup I've had Chrome since it came out with its first version. Stuck with it ever since. Miss some things about Firefox but Google always fills in the blanks eventually. I can't find many things that Google is not the best at.
Member Since: 24.11.2005 Posts: 586 Comments: 25443
718. StormFreakyisher 25. toukokuuta 2009 klo 02:53 (GMT)    
Quoting CybrTeddy:
Anyone else noticing how similar 2009 is shaping into 2004? Developing El Nino, shear models indicating almost the same shear as 2004, Bremuda High position (I think, I read it earlier so I may be wrong) I sure hope Im dead wrong. I want to be dead wrong. The horror I faced in 2003-2004-2005 is unmatched. Staring down a Category 5 in Virgina to next year staring down a RI Category 4/4 right off the West Florida coast to staring at the strongest Hurricane ever recorded in the Atlantic heading straight for you is unmatched horror.

Okay Cyber now your scaring me.Are those facts true?
Member Since: 16.05.2009 Posts: 0 Comments: 684
719. KoritheMan 25. toukokuuta 2009 klo 02:53 (GMT)    
Quoting cchsweatherman:
Just went and downloaded Google Chrome to give it a test run and its so much faster than Internet Explorer and so much simpler to use. Think I'm going to stick with Google Chrome from now on since its going to make things so much easier.


From my experience, Google Chrome seems to have difficulty properly loading javascripts. Sometimes it works, sometimes it doesn't.

It could be just my own personal problem though, that no one else has.
Member Since: 7.03.2007 Posts: 408 Comments: 15429
721. EtexJC 25. toukokuuta 2009 klo 02:56 (GMT)    
Thanks for the update, i need over the next 3 weeks is some steady rains. I would love 7-8 days over next 21-28 days.
Member Since: 17.08.2007 Posts: 0 Comments: 218
722. Levi32 25. toukokuuta 2009 klo 02:56 (GMT)    
Quoting KoritheMan:


From my experience, Google Chrome seems to have difficulty properly loading javascripts. Sometimes it works, sometimes it doesn't.

It could be just my own personal problem though, that no one else has.


Had the same problem with some java satellite loops, but Chrome 2 seems to have fixed that problem, along with over 350 other bugs.
Member Since: 24.11.2005 Posts: 586 Comments: 25443
723. K8eCane 25. toukokuuta 2009 klo 02:56 (GMT)    
press
you and me both must be in lurk mode tonite
Member Since: 26.04.2006 Posts: 5 Comments: 2369
725. Levi32 25. toukokuuta 2009 klo 02:57 (GMT)    
Out for dinner, later all.
Member Since: 24.11.2005 Posts: 586 Comments: 25443
726. Levi32 25. toukokuuta 2009 klo 02:59 (GMT)    
Quoting Vortex95:
716. It still can move but it seems that the Carolinas are at greater risk this season. However if at the right time another High pressure system were to build in the midatlantic region then it would head straight to Florida. Btw would a stronger storm have a greater chance of curving than a weaker one?


That is correct. Stronger system = deeper system, which is more sensitive to passing mid-latitude troughs, and is more likely to recurve.

Bermuda High positions in May usually foreshadow the mean position for the rest of the summer, but as you said the weather pattern could set up for one week in a way that could direct a storm anywhere. Everybody should always be ready.

Later all.
Member Since: 24.11.2005 Posts: 586 Comments: 25443
727. StormFreakyisher 25. toukokuuta 2009 klo 03:00 (GMT)    
can some one show where the bermuda high is located now and will it expand farther west or show me a map of this years bermuda high please.
Member Since: 16.05.2009 Posts: 0 Comments: 684
728. beell 25. toukokuuta 2009 klo 03:04 (GMT)    
Member Since: 11.09.2007 Posts: 124 Comments: 12867
729. StormFreakyisher 25. toukokuuta 2009 klo 03:11 (GMT)    

Seems like there are two main paths the storms went in '04.Will '09 follow this?
Member Since: 16.05.2009 Posts: 0 Comments: 684
730. presslord 25. toukokuuta 2009 klo 03:12 (GMT)    
...yea...I'm not diggin' all this "Carolina" talk...
Member Since: 13.08.2007 Posts: 0 Comments: 10377
733. beell 25. toukokuuta 2009 klo 03:15 (GMT)    
Quoting presslord:
...yea...I'm not diggin' all this "Carolina" talk...


Edit 85W to 80W

Ok, let's change it to folks living along 80W
Member Since: 11.09.2007 Posts: 124 Comments: 12867
735. presslord 25. toukokuuta 2009 klo 03:19 (GMT)    
cool...I'm 4 hours from I 85
Member Since: 13.08.2007 Posts: 0 Comments: 10377
736. StormFreakyisher 25. toukokuuta 2009 klo 03:20 (GMT)    

Which arrow and "average" you mean for this season 2009 or just general average.
Member Since: 16.05.2009 Posts: 0 Comments: 684
738. beell 25. toukokuuta 2009 klo 03:25 (GMT)    
Sorry, meant 80W.
Even better...

Member Since: 11.09.2007 Posts: 124 Comments: 12867
739. presslord 25. toukokuuta 2009 klo 03:27 (GMT)    
...ah...
Member Since: 13.08.2007 Posts: 0 Comments: 10377
742. hahaguy 25. toukokuuta 2009 klo 03:35 (GMT)    
Quoting StSimonsIslandGAGuy:
Uh-oh:

Link


I just saw that on the news.
Member Since: 12.08.2007 Posts: 2 Comments: 2838
743. K8eCane 25. toukokuuta 2009 klo 03:38 (GMT)    
now thats scary
Member Since: 26.04.2006 Posts: 5 Comments: 2369
745. K8eCane 25. toukokuuta 2009 klo 03:40 (GMT)    
guess that would obliterate weather altogether
Member Since: 26.04.2006 Posts: 5 Comments: 2369
747. K8eCane 25. toukokuuta 2009 klo 03:43 (GMT)    
say whut??
Member Since: 26.04.2006 Posts: 5 Comments: 2369
748. K8eCane 25. toukokuuta 2009 klo 03:45 (GMT)    
north korea is trigger happy lately or something
Member Since: 26.04.2006 Posts: 5 Comments: 2369
749. K8eCane 25. toukokuuta 2009 klo 03:46 (GMT)    
but i guess they feel the need to go to those measures to protect themselves
Member Since: 26.04.2006 Posts: 5 Comments: 2369
750. melwerle 25. toukokuuta 2009 klo 03:50 (GMT)    
Quoting presslord:
...yea...I'm not diggin' all this "Carolina" talk...


Um...I think i've missed a good majority of the converstaion tonight - am going to go back and read it but someone wanna give me the cliff notes? I live on the border of GA/SC. Are we due for some issues?
Member Since: 28.06.2006 Posts: 12 Comments: 1837
751. StormFreakyisher 25. toukokuuta 2009 klo 03:55 (GMT)    
Fact-A hurricane can equal to 500,000 atomic bombs.Link
Member Since: 16.05.2009 Posts: 0 Comments: 684

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About JeffMasters
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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