Irene's eyewall collapses; further intensification unlikely

By: Dr. Jeff Masters , 3:14 PM GMT on August 26, 2011

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Satellite data and measurements from the Hurricane Hunters show that Irene is weakening. A 9:21 am EDT center fix by an Air Force Reserve aircraft found that Irene's eyewall had collapsed, and the central pressure had risen to 946 mb from a low of 942 mb this morning. The highest winds measured at their flight level of 10,000 feet were 125 mph, which would normally support classifying Irene as a Category 3 hurricane with 115 mph winds. However, these winds were not mixing down to the surface in the way we typically see with hurricanes, and the strongest surface winds seen by the aircraft with their SFMR instrument were just 90 mph in the storm's northeast eyewall. Assuming the aircraft missed sampling the strongest winds of the hurricane, it's a good guess that Irene is a mid-strength Category 2 hurricane with 100 mph winds. Satellite imagery shows a distinctly lopsided appearance to Irene's cloud pattern, with not much heavy thunderstorm activity on the southwest side. This is due to moderate wind shear of 10 - 20 knots due to upper-level winds out of the southwest. This shear is disrupting Irene's circulation and has cut off upper-level outflow along the south side of the hurricane. No eye is visible in satellite loops, but the storm's size is certainly impressive. Long range radar out of Wlimington, North Carolina, shows that the outermost spiral bands from Irene are now beginning to come ashore along the South Carolina/North Carolina border. Winds at buoy 41004 100 miles offshore from Charleston, SC increased to 36 mph as of 10 am, with significant wave heights of 18 feet.


Figure 1. Distribution of Irene's wind field at 9:30 am EDT Friday August 26, 2011, as observed by the Hurricane Hunters and buoys. The right front quadrant of the hurricane had about 90% of the storm's hurricane-force winds (yellow and warmer colors, bounded by the heavy black line between the "50" and "60" knot thin black lines.) Tropical storm-force winds (heavy black like bounding the light blue area) extended out 290 miles from the center of Irene. Image credit: NOAA/AOML/HRD.

Forecast and storm surge potential for Irene
With its eyewall collapsed and just 24 more hours over water before landfall, it is unlikely Irene will have time to build a new eyewall and intensify. The storm is too large to weaken quickly, and the best forecast is that Irene will be a Category 2 hurricane at landfall in North Carolina on Saturday, and a rapidly weakening Category 1 hurricane at its second landfall in New England on Sunday. However, since Irene is such a huge storm--tropical storm force winds extend out up to 290 miles from the center--it has set a massive amount of the ocean's surface in motion, which will cause a much larger storm surge than the winds would suggest. At 9:30am EDT this morning, a wind analysis from NOAA/HRD (Figure 1) indicated that the potential storm surge damage from Irene rated a 5.1 on a scale of 0 to 6. This is equivalent to the storm surge a typical Category 4 hurricane would have. While this damage potential should gradually decline as Irene moves northwards and weakens, we can still expect a storm surge one full Saffir-Simpson Category higher than Irene's winds. Since tides are at their highest levels of the month this weekend due to the new moon, storm surge flooding will be at a maximum during the high tidal cycles that will occur at 8 pm Saturday night and 8 am Sunday morning. Wherever Irene happens to be at those times the storm surge damage potential will be maximized. A surge rivaling that experienced during Hurricane Isabel in 2003 is likely in northern NC, southern Maryland, and up Chesapeake Bay on Saturday night. Coastal New England from New York City to Massachusetts may also see storm surges characteristic of a Category 1 hurricane during Sunday morning's high tide, even if Irene has weakened to a tropical storm. I continue to give a 20% chance that a storm surge high enough to over-top the Manhattan flood walls and swamp the New York City subway system will occur on Sunday.

Wind damage
I don't think Irene is going to do a lot of wind damage to the mid-Atlantic states, since the eye of the storm will be just offshore, and the I-95 corridor from Virginia to New Jersey will be on the weak (left) side of the hurricane. The current wind distribution of Irene (Figure 1) shows almost all of the hurricane's winds are on the right side of the storm, and by the time the storm reaches Virginia, there will be likely be no hurricane-force winds on the left side of Irene. Sustained winds should stay below 74 mph (hurricane force), and wind damage will be similar to that wrought be some of the strongest Nor'easters of the past 20 years, from Virginia northwards to New York City. Since Irene will be steadily weakening as it approaches its second landfall on Long Island, I give a 50% chance that no mainland U.S. surface station in New England will record sustained hurricane-force winds. I do think it likely that one or more of the offshore islands--Block Island, Nantucket, and Marthas Vinyard--will get Category 1 hurricane winds. Though the wind damage to buildings will be similar to what the Northeast has seen during some of the more severe nor'easters of the past 20 years, tree damage will be much worse. The trees are in full leaf during hurricane season, and catch the wind much more readily than during the winter. Tree damage will very heavy, and we can expect trees in regions with saturated soils will fall over in high winds onto power lines. Irene is likely to cause one of the top-five most widespread power outages in American history from a storm. The record power outage from a Northeast storm was probably the ten million people that lost power during the great Blizzard of 1993. I don't think Irene's power outages will be quite that extensive, but several million people will likely lose power.

Irene likely to bring destructive fresh water flooding
In addition to storm surge, flash flooding and river flooding from Irene's torrential rains are the main threats. The hurricane is expected to bring rains in excess of 8" to a 100-mile-wide swath from Eastern North Carolina northwards along the coast, through New York City. The danger of fresh water flooding is greatest in northern New Jersey, Southeast Pennsylvania, and Southeast New York, where the soils are saturated from heavy August rains that were among the heaviest on record. New Jersey has had its 6th wettest August on record, with most of that rain falling in the past two weeks. Expect major river flooding throughout New Jersey the Delmarva Peninsula, and regions near New York City, as Irene's rains run off the saturated soils directly into the rivers. In general, the heaviest rains will fall along the west side of the hurricane's track, and the greatest wind damage will occur on the east side. I don't think flooding from heavy rains will be a huge concern in North Carolina, which is under moderate to severe drought. Irene's rains are likely to do some good in Southeast Virginia, where a fire triggered by lightning from a thunderstorm on August 4 sparked a fire in the Dismal Swamp that is burning out of control. Right now, it does not appear that tornadoes will be a major concern, but there will probably be a few weak tornadoes. Hurricane Bob of 1991, the last hurricane to affect New England, spawned six tornadoes, most of them weak F-0 and F-1 twisters.


Figure 2. Predicted rainfall for the 5-day period ending at 8 am EDT Wednesday August 31, as issued by NOAA/HPC.

Links
For those of you wanting to know your odds of receiving hurricane force or tropical storm force winds, I recommend the NHC wind probability product.

Wunderground has detailed storm surge maps for the U.S. coast.

The National Hurricane Center's Interactive Storm Surge RIsk Map, which allows one to pick a particular Category hurricane and zoom in, is a good source of storm surge risk information.

Wunderblogger Mike Theiss is in Nassau, documenting the storm's impact on the Bahamas.

Internet radio show on Irene at 4:30pm EDT
Wunderground meteorologists will be discussing Hurricane Irene on a special edition of our Internet radio show, the Daily Downpour, today (Friday) at 4:30pm EDT. Shaun Tanner , Tim Roche, Angela Fritz, and Rob Carver will there, and I will be available if my schedule permits. Listeners can email in or call in questions. The email address to ask questions is broadcast@wunderground.com.

Portlight mobilizes for Irene
The Bahamas have been hit hard by Irene, and unfortunately, it appears that the Northeast U.S. may have its share of hurricane victims before Irene finally dissipates. My favorite disaster relief charity, Portlight.org, is mobilizing to help, and has sent out their relief trailer and crew to North Carolina. Check out this blog to see what they're up to; donations are always needed.

Jeff Masters

Hurricane Irene's Wrath ! (MikeTheiss)
A shot of the Palm Trees at Nassau, Bahamas being thrashed by high winds during Irene's closest approach !
Hurricane Irene's Wrath !
Aftremath of Hurricane Irene in Nassau, Bahamas (ktbahamas)
Utility pole with street light snapped in half by Irene's winds on a busy street in New Providence.
Aftremath of Hurricane Irene in Nassau, Bahamas
Irene Response (presslord)
Portlight deploying to North Carolina
Irene Response

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Member Since: July 15, 2006 Posts: 171 Comments: 53817
SHIPS shows a higher than normal probability of RI, though lower than a day or so ago.


Prob of RI for 25 kt RI threshold= 21% is 1.7 times the sample mean(12.8%)
Prob of RI for 30 kt RI threshold= 16% is 1.9 times the sample mean( 8.4%)
Prob of RI for 35 kt RI threshold= 10% is 2.1 times the sample mean( 5.0%)
Prob of RI for 40 kt RI threshold= 1% is 0.3 times the sample mean( 3.4%)

Also interesting to note the 12Z HWRF showed weakinging at the 6 hour point, then restrenthens 10-15 kt.


HOUR: 0.0 LONG: -77.20 LAT: 30.00 MIN PRESS (hPa): 946.00 MAX SURF WIND (KNOTS): 89.00
HOUR: 6.0 LONG: -77.40 LAT: 31.10 MIN PRESS (hPa): 946.00 MAX SURF WIND (KNOTS): 78.00
HOUR: 12.0 LONG: -77.40 LAT: 31.90 MIN PRESS (hPa): 945.00 MAX SURF WIND (KNOTS): 87.00
HOUR: 18.0 LONG: -77.10 LAT: 32.70 MIN PRESS (hPa): 942.00 MAX SURF WIND (KNOTS): 89.00
HOUR: 24.0 LONG: -76.80 LAT: 33.50 MIN PRESS (hPa): 940.00 MAX SURF WIND (KNOTS): 96.00
HOUR: 30.0 LONG: -76.40 LAT: 34.40 MIN PRESS (hPa): 938.00 MAX SURF WIND (KNOTS): 95.00
HOUR: 36.0 LONG: -75.80 LAT: 35.30 MIN PRESS (hPa): 941.00 MAX SURF WIND (KNOTS): 85.00
HOUR: 42.0 LONG: -74.90 LAT: 36.50 MIN PRESS (hPa): 940.00 MAX SURF WIND (KNOTS): 88.00
HOUR: 48.0 LONG: -73.80 LAT: 38.10 MIN PRESS (hPa): 941.00 MAX SURF WIND (KNOTS): 84.00
HOUR: 54.0 LONG: -72.40 LAT: 40.30 MIN PRESS (hPa): 943.00 MAX SURF WIND (KNOTS): 80.00
HOUR: 60.0 LONG: -70.80 LAT: 43.00 MIN PRESS (hPa): 951.00 MAX SURF WIND (KNOTS): 67.00
Member Since: Posts: Comments:
Quoting P451:


For about 35 years, yes. Lived in Florida for a few as well from time to time. Recently this January I moved into NY 30 miles north of NYC. I have a lot of family and friends in that county and know it very well.



Lived in Avon-by-the-Sea for a while, loved the shore.
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Hurricane hints:
If a storm is fast moving, placing duct tape around the doors sometimes can prevent seepage from the storm surge. (Worked with Hurricane Andrew in Miami, but only if storm surge persists for a short period of time and is not very deep.)

Even one inch of seawater in your home can destroy the carpet, especially if power outages prevent drying afterwards, so it might be worth the effort.

Also, placing furniture on blocks or trestles may help if the storm surge at your home is not too high. Elevate everything possible off the floor and onto tables or anything higher. If the storm surge at your house is 15 feet, nothing will help, but more people will have the situation of it being only a few feet or even inches.

Consider double bagging art or photographs with heavy garbage bags. When the window of my grandmother's home blew out, all surfaces were covered with a green slime of rain and shredded leaves. The mold destroyed a lot of our family photographs and artwork.
Member Since: Posts: Comments:
I check here regularly during hurricane season and follow this and Levi's blogs during all active systems no matter where they are. I find the comments on Dr. Master's blog educational even some of the misinformation since I tend to look up much of what is being talked about on other sources offsite.

BTW, I live in SE Louisiana. I live north of the areas that received water damage from Katrina, but not far enough north to have avoided the wind. This area was without power for nearly 3 weeks: Their were over 20 trees down on our 7 acres. Once roads opened our local gasoline supply was quickly exhausted and people had to drive an hour NW to find fuel.

Interesting point about storm surge: Although N.O. was the focus of the flooding here (coastal MS took the worst actual surge), the Northshore area of Lake Ponchartrain took a lot of water. The bayous and rivers flooded well inland and overtook several areas, like Lacombe. In one particular area in Slidell, water reached 12' deep in the sub-division where I was trim carpenter. The land this sub-division was built on had never had any recordable flooding....ever.
Member Since: Posts: Comments:
Everyone right now.. STOP THE DOWNCASTING!!! Irene is not falling apart, would love to see evidence, besides the water vapor, that Irene is rapidly weakening. You are mis informing the people who are trying to find out the reality of this storm. Irene will most likely be a Hurricane when it hits the Northeast, period!
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Quoting DontAnnoyMe:


Relax. .2 degrees is only about 15 miles.


Wow, you should really take the recommendation of your own screen name.
Member Since: August 25, 2006 Posts: 1 Comments: 3025
irene's ingesting alot of dry air,look at those two large dry slots,probably 90mph landfall,nyc should get sustained 50-60 imo
Member Since: October 5, 2007 Posts: 20 Comments: 4970
So here's a question for you whiners about "oh the media over-hyped the storm."

What is better? over-hyping, or under-hyping? Because unless you can make perfect forecast without any chance of being wrong... one or the other is always going to happen. Do you suggest that the media takes the current forecasts and downplays them? Because as much as I disagree with a lot of what the media does, they certainly have not "up-played" this storm and its potential all that much at all. So if what forecasters and the media have been saying is "over-hyping" Irene... then I can only assume what you desire is for them to downplay every forecast until a hurricane is virtually on-top of any given forecast landfall.
Member Since: November 17, 2010 Posts: 11 Comments: 527
Quoting ShenValleyFlyFish:
Utter silliness. That kind of snow in those places would be front page headlines the world over.


Similar to what happened right after Ike made landfall? News outlets reported it for a day or two max then never heard about it again. Unless of course you were watching the Houston news.
Member Since: Posts: Comments:
... from Dr. Master's Blog report ...
Satellite imagery shows a distinctly lopsided appearance to Irene's cloud pattern, with not much heavy thunderstorm activity on the southwest side. This is due to moderate wind shear of 10 - 20 knots due to upper-level winds out of the southwest. This shear is disrupting Irene's circulation and has cut off upper-level outflow along the south side of the hurricane.

Dry air and shear seem to be taking its toll on Jolly Irene!
Member Since: July 31, 2006 Posts: 19 Comments: 1565
Right now, we are in High Wind Warning with gusts up to 60 MPH according to NWS Raleigh:

30 TO 40 MPH WITH PEAK GUSTS BETWEEN 50 AND 60 MPH.

And if Irene kept going to NNW for 2-3 more hours, then we'll get tropical storm warning. If this storm go all the way to Wilmington landfall (little chance), we'll get Hurricane Warning.
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Quoting ecupirate:

The ECMWF is wrong.

Irene is falling apart.

Link


That is not true. Irene's structure continues to improve on satellite.
Member Since: July 6, 2010 Posts: 113 Comments: 32024
Quoting ConnecticutWXGuy:


that's because the MEAN direction is still north. it has wobbled NE and NW at times but its average direction is still north. In fact there has been no western movement and a hint of an easterly component over the last few frames of satellite.


Whatever, .2 W is .2 W, call it what you want but it's not N.
Member Since: August 25, 2006 Posts: 1 Comments: 3025
Quoting Cayman2010:

Whilst that is certainly the case for many of the said people, it is still a gross generalization and certainly not indicative of all. There are many people from those places listed who do not fall into this generalization and continue to follow the situation with great concern for all those in Irene's path.

They are also the ones who just aren't necessarily, being condescending and telling you what to do :-)


A number of the usual posters are also caught up in power outages in the islands, and so being on here is not one of their priorities.
Member Since: Posts: Comments:
I won't be surprised if Irene intensifies quickly tonight up until landfall on NC. Also of note is that TD 10 could be a mix of pre Katrina 2005 TD 10 and Hurricane Wilma, in terms of Katrina's pre TD10 and the track into the Caribbean Sea like pre Wilma. Still a lot to watch out for in the coming weeks.
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Member Since: Posts: Comments:
710. Mikla
Well, bought the plane ticket and headed to CT (Hartford area) to make sure my parents house is ready for whatever may come.

Bringing my little handheld weather wonder and rugged laptop with a 3G card so I can try to post if things get interesting.

I expect the winds will be in the 60-80mph range, but with a little luck Long Island will take some of the umph out first (it's about 85 miles from the S beaches of LI to Hartford).
Member Since: Posts: Comments:
Link

Once more, with feeling

Member Since: August 29, 2005 Posts: 0 Comments: 44
Quoting Grothar:
Early indications are that these two waves over Africa may track very close to the Antilles in the coming week.



Those guys will definitely be next weeks story ... but you never know the Atlantic is still nice and warm for storms to grow and scare us over here
Member Since: July 31, 2006 Posts: 19 Comments: 1565
Quoting P451:
This is a very large and dangerous storm that is going to affect a lot of people. Take it seriously.


Re: post 540: Anyone notice the "Virgin of Irene" who appears in the lower right of the last frame in the image?
Can't copy the loop, so check post 540 and see...
Member Since: Posts: Comments:
Quoting Melagoo:
with out a doubt I'd be weary of any Tornados spinning off of her than anything else


Quite true. But near the coast, I would worry about the storm surge. That is what takes peoples lives.
Member Since: June 9, 2011 Posts: 0 Comments: 100
Here in Raleigh, we just got the first wave of rain. The winds was blowing 20-30 mph and the rain was wet enough to creates puddles on the road in just 3 minutes. However, my school have not cancelled or moved up the game few hours earlier so my school is attempting to beat the storm. I will be doing some videotaping for my Youtube account (Bluestorm5, but I've not used it for awhile...)
Member Since: Posts: Comments:
http://rammb.cira.colostate.edu/ramsdis/online/loop _640.asp?product=goes-east_4km_shortwave_albedo_al t

Maybe happier with flash
Member Since: August 29, 2005 Posts: 0 Comments: 44
Quoting 69Viking:
The NE bend will eventually occur but when exactly? It appears the trough that turned Irene North was weaker than forecasted and has already left the area leaving Irene behind and now moving W of N again. The next trough looks like it could take a while to get to Irene so is she going to continue this W of N movement until landfall? The NHC Forecast Track jumps NE at it's next point yet that's not the direction Irene is currently traveling. Seems she could make landfall quite a bit West of where they are currently forecasting, sure hope the people there are ready.


Yep, no way she hits the next forecast point
Member Since: June 2, 2010 Posts: 0 Comments: 1339
701. ShenValleyFlyFish
6:46 PM GMT on August 26, 2011
Quoting DavidHOUTX:


That is a good point. It will be interesting to see how high the storm surge gets in the NYC area. People often forget that if they have a 4 ft storm surge, the high swell are on top of the storm surge!

It is kind of interesting all the attention this is getting. If Houston or NOLA or Miami received 2 feet of snow in a night the northerners would be like so? Kinda weird that they are the ones in our shoes now.
Utter silliness. That kind of snow in those places would be front page headlines the world over.
Member Since: September 9, 2007 Posts: 36 Comments: 4687
700. leelee75k
6:45 PM GMT on August 26, 2011
floridian lurker still here, I'm even here in the winter when the global warming debates happen, but only comment now and then.

I think the blog is quiet because many are in school and there is still quite a hours before any landfall, it should busy again later tonight.

back to lurking and occassional posting.
Member Since: September 9, 2005 Posts: 0 Comments: 562
699. ecupirate
6:45 PM GMT on August 26, 2011
Quoting TropicalAnalystwx13:
The ECMWF strengthens Irene before landfall in North Carolina.

The ECMWF is wrong.

Irene is falling apart.

Link
Member Since: July 27, 2011 Posts: 0 Comments: 204
698. hurricanejunky
6:45 PM GMT on August 26, 2011
Wow, the way it's moving it might make it back over to NC/SC border but I'm still sticking with Wilmington
Member Since: August 28, 2006 Posts: 6 Comments: 2898
697. Cayman2010
6:45 PM GMT on August 26, 2011
Quoting oakland:


Many of us are lurkers with minimal posts. It doesn't mean we don't care.

Exactly. Unfortunately somtimes those who should say the least are often the ones who say the most. Others post when they have something relevant to say, not to just increase their comment count.
Member Since: August 31, 2010 Posts: 0 Comments: 90
695. xtremeweathertracker
6:45 PM GMT on August 26, 2011
Later Guys!!
BLOG UPDATE:
Hurricane Irene Video Update
Member Since: May 31, 2011 Posts: 57 Comments: 571
694. stillwaiting
6:44 PM GMT on August 26, 2011
Quoting P451:


For about 35 years, yes. Lived in Florida for a few as well from time to time. Recently this January I moved into NY 30 miles north of NYC. I have a lot of family and friends in that county and know it very well.

,croton right??,i'll be up in ossining in 2weeks,my grandma lives right off 9,stay safe!!
Member Since: October 5, 2007 Posts: 20 Comments: 4970
693. TropicalAnalystwx13
6:44 PM GMT on August 26, 2011
The ECMWF strengthens Irene before landfall in North Carolina.
Member Since: July 6, 2010 Posts: 113 Comments: 32024
692. Melagoo
6:44 PM GMT on August 26, 2011
Quoting carcar1967:


But still a large and dangerous storm.
with out a doubt I'd be weary of any Tornados spinning off of her than anything else
Member Since: July 31, 2006 Posts: 19 Comments: 1565
691. 69Viking
6:44 PM GMT on August 26, 2011
The NE bend will eventually occur but when exactly? It appears the trough that turned Irene North was weaker than forecasted and has already left the area leaving Irene behind and now moving W of N again. The next trough looks like it could take a while to get to Irene so is she going to continue this W of N movement until landfall? The NHC Forecast Track jumps NE at it's next point yet that's not the direction Irene is currently traveling. Seems she could make landfall quite a bit West of where they are currently forecasting, sure hope the people there are ready.
Member Since: August 25, 2006 Posts: 1 Comments: 3025
690. 7544
6:43 PM GMT on August 26, 2011
looks nnw ?
Member Since: May 6, 2007 Posts: 0 Comments: 6812
688. Grothar
6:43 PM GMT on August 26, 2011
Early indications are that these two waves over Africa may track very close to the Antilles in the coming week.

Member Since: July 17, 2009 Posts: 71 Comments: 26124
687. hswiseman
6:43 PM GMT on August 26, 2011


This is an ice crystal radius image which claims to identify intensity of upward airflow (smaller crystals=greater upward motion). Relevance to 'cane casting? Unknown.
Member Since: August 29, 2005 Posts: 0 Comments: 44
686. mcluvincane
6:42 PM GMT on August 26, 2011
Quoting zawxdsk:
ECMWF 12Z run is in...





wow big shift west
Member Since: June 2, 2010 Posts: 0 Comments: 1339
684. carcar1967
6:41 PM GMT on August 26, 2011
Quoting Melagoo:


She's a tired old bag of wind now definitately not the impressive storm of last night


But still a large and dangerous storm.
Member Since: June 9, 2011 Posts: 0 Comments: 100
683. Grothar
6:41 PM GMT on August 26, 2011




Member Since: July 17, 2009 Posts: 71 Comments: 26124
682. extreme236
6:41 PM GMT on August 26, 2011
12z GFS develops another impressive wave in about 72 hours or so...and maybe another frontal-like system off the east coast as well.
Member Since: August 2, 2007 Posts: 19 Comments: 19234
681. ConnecticutWXGuy
6:40 PM GMT on August 26, 2011
Quoting 69Viking:


No kidding, does the NHC not pay attention to their own information when deciding direction of a storm??? It's like they don't want to go against the forecast of their last advisory that said it would continue N for a while and then turn NE yet even a rookie weather enthusiast can see via satellite that it moved W of N over the last few hours, this wasn't just jog left of the eye.


that's because the MEAN direction is still north. it has wobbled NE and NW at times but its average direction is still north. In fact there has been no western movement and a hint of an easterly component over the last few frames of satellite.
Member Since: November 17, 2010 Posts: 11 Comments: 527
680. extreme236
6:40 PM GMT on August 26, 2011
Quoting 800733:
what are everyones thoughts on TD10?


Looks like 5pm will probably be the last advisory IMO
Member Since: August 2, 2007 Posts: 19 Comments: 19234
679. DontAnnoyMe
6:40 PM GMT on August 26, 2011
Quoting 69Viking:


No kidding, does the NHC not pay attention to their own information when deciding direction of a storm??? It's like they don't want to go against the forecast of their last advisory that said it would continue N for a while and then turn NE yet even a rookie weather enthusiast can see via satellite that it moved W of N over the last few hours, this wasn't just jog left of the eye.


Relax. .2 degrees is only about 15 miles.
Member Since: September 21, 2010 Posts: 1 Comments: 3690

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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.