ATL HANNA: Extratropical - Discussion

[KWT]

It is a big systems in terms of convection but the wind radii isn't really that large at the moment anyway. Still its certainly producing some very deep convection, those grays are still on the IR!

[WmE]

I like to compare this with katrina.
I would also like to compare it with Pacific storm typhoon tip.
As far as size goes,
obviously those storms were stronger then Hanna is curently now

Hanna's wind radii is not even remotely close to those TCs...

Comparing this with Tip is like comparing a guinea pig with a blue whale.

[txwatcher91]

Hanna is about the size of Floyd from what I can best remember.

[gatorcane]

TWC just put up a graphic with only Northern FL just in the cone, must of it heading to SC/NC.

To me that is terrible forecasting when the NHC has South FL to NC in the cone and just made a statement that they are not sure where it is heading but anybody from South Florida to NC should pay attention

Anybody watching TWC in FL (Central or South) would get a false sense of confidence with the TWC forecast.

[storms in NC]

Georgia hasn't been hit by a hurricane since 1893...

savannah/georgia coast
If there's ever been an area within the southeastern coast of the U.S. that has been lucky from getting hit by major hurricanes recently, its been the Georgia coast. Major storms such as Hugo, Fran, and Floyd all stayed north of Georgia affecting the Carolina coasts. The last time a hurricane made landfall along the Georgia coast was 1979 when David came in at Savannah Beach as a strong category 1 storm with winds around 90 mph and a storm surge up to 5 feet. The city of Savannah reported a maximum sustained wind of 58 mph. They also picked up close to 7 inches of rain. No major damage was reported there. The 1940s were an active decade for hurricanes in Georgia. In 1947, a category 1 hurricane approached from the due west and slammed right to the south of Savannah with the storm surge helping to cause a lot of damage along the city's riverfront to warehouses. A similiar situation occured in 1940 as a category 1 hurricane came in from the east killing 50. But the last major hurricane to hit Georgia was in 1893 when a category 3 struck near Brunswick and it helped bring a storm surge that inundated the city in a half a foot of water for 12 hours. 2,000 people were killed in that hurricane in the south Atlantic region.

Read the rest here
http://www.angelfire.com/ga/mrsweather/atlweather.html

[MiamiensisWx]

Georgia hasn't been hit by a hurricane since 1893...

savannah/georgia coast
If there's ever been an area within the southeastern coast of the U.S. that has been lucky from getting hit by major hurricanes recently, its been the Georgia coast. Major storms such as Hugo, Fran, and Floyd all stayed north of Georgia affecting the Carolina coasts. The last time a hurricane made landfall along the Georgia coast was 1979 when David came in at Savannah Beach as a strong category 1 storm with winds around 90 mph and a storm surge up to 5 feet. The city of Savannah reported a maximum sustained wind of 58 mph. They also picked up close to 7 inches of rain. No major damage was reported there. The 1940s were an active decade for hurricanes in Georgia. In 1947, a category 1 hurricane approached from the due west and slammed right to the south of Savannah with the storm surge helping to cause a lot of damage along the city's riverfront to warehouses. A similiar situation occured in 1940 as a category 1 hurricane came in from the east killing 50. But the last major hurricane to hit Georgia was in 1893 when a category 3 struck near Brunswick and it helped bring a storm surge that inundated the city in a half a foot of water for 12 hours. 2,000 people were killed in that hurricane in the south Atlantic region.

Read the rest here
http://www.angelfire.com/ga/mrsweather/atlweather.html

Friendly correction:

According to this official list, the 1940 and 1947 hurricanes were Category 2 (not Category 1) hurricanes at landfall...

http://www.aoml.noaa.gov/hrd/hurdat/ushurrlist18512007.txt

[Blown Away]

I like to compare this with katrina.
I would also like to compare it with Pacific storm typhoon tip.
As far as size goes,
obviously those storms were stronger then Hanna is curently now

Tip was 1380 miles in diameter with 190 MPH winds

STUD cane/typhoon.

[robbielyn]

this truly may end up being up one of the largest hurricanes size-wise in Atlantic basin history. Even with shear hitting her hard.

The size of Hanna as she continues to grow is simply amazing:

that entity in between hanna and ike (I think thats whats left of 98L) looks like a sea horse.

[x-y-no]

Channel 10 Met here in Miami just claimed that a feeder band for Hanna is moving into the SFL area.



Sure, we've got some sprinkles moving in from the NE, but that ain't no feeder band.

[gatorcane]

NWS Miami -- imply that focusing on the line is not wise:

000
FXUS62 KMFL 011946
AFDMFL

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MIAMI FL
346 PM EDT MON SEP 1 2008

.DISCUSSION...MAIN CONCERN WITH THIS FORECAST PACKAGE CONCERNS
TRACK OF HANNA AND LOCAL IMPACTS. HANNA BECAME A HURRICANE THIS
AFTERNOON NEAR MAYAGUANA ISLAND IN THE SOUTHEASTERN BAHAMAS. NHC
TRACK TAKES HANNA OVER THE NORTHERN BAHAMAS BY THURSDAY MORNING
WITH TROPICAL STORM WIND RADII ENTERING THE LOCAL ATLANTIC WATERS.
ON THIS GIVEN TRACK...TROPICAL STORM CONDITIONS WOULD AFFECT
PORTIONS OF THE LOCAL ATLANTIC WATERS...ESPECIALLY THE PALM BEACH
WATERS....ALONG WITH HIGH SURF...BEACH EROSION...AND EVEN
POSSIBLE MINOR COASTAL FLOODING. THE ATLANTIC COAST WOULD SEE
SOME OUTER PERIPHERY RAINBANDS WELL WEST OF HANNA...ESPECIALLY
THE PALM BEACH COAST. HOWEVER...IT IS VERY IMPORTANT TO KEEP IN
MIND THAT THESE AFOREMENTIONED IMPACTS RELATE TO THE CURRENT FCST
TRACK. MOST OF MAINLAND SOUTH FL CONTINUES IN THE "CONE OF
UNCERTAINTY" WITH HANNA...AND ANY SHIFT TO THE WEST WOULD MEAN A
MUCH GREATER IMPACT TO MAINLAND SOUTH FLORIDA...ESPECIALLY PALM
BEACH...BROWARD...AND MIAMI-DADE COUNTIES. ALSO...EXPANSION OF
HANNA IN TERMS OF HER WIND FIELD WILL NEED TO BE WATCHED CLOSELY.
OF COURSE A SHIFT TO THE EAST WOULD THEN MEAN LESS IMPACT AND THEN
DRYING/SUBSIDENCE AND NICE WEATHER...SO WE ARE WALKING A FINE LINE
HERE...AND THIS WILL CONTINUE TO BE WATCHED VERY CLOSELY.

&&

.MARINE...ATLANTIC SEAS WILL BUILD TO HAZARDOUS LEVELS BY EARLY
TUE MORNING AND WILL CONTINUE TO BUILD OVER THE NEXT SEVERAL DAYS
AS WINDS STRENGTHEN OUT OF THE NORTHEAST AND NORTH TO THE WEST OF
HANNA.

&&

.FIRE WEATHER...NO CONCERNS.

&&

.PRELIMINARY POINT TEMPS/POPS...
WEST PALM BEACH 81 90 82 90 / 10 20 20 20
FORT LAUDERDALE 82 90 83 90 / 10 20 20 20
MIAMI 82 91 83 91 / 10 20 20 20
NAPLES 77 93 75 93 / 20 30 10 20

&&

.MFL WATCHES/WARNINGS/ADVISORIES...
FL...HIGH SURF ADVISORY UNTIL 4 PM EDT THIS AFTERNOON FOR FLZ069.

AM...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS FROM 2 AM TUESDAY TO 8
AM EDT FRIDAY FOR AMZ650-AMZ651-AMZ670-AMZ671.

GM...NONE.
&&

$$

GREGORIA

http://www.srh.noaa.gov/fwd/productview ... &version=0

[KWT]

Looks like Hannais starting to organise after looking a tough stretched, I suspect further strengthening is probably happening, recon could possibly find pressure below 980mbs...

Got to admit I've rarely seen such explosive convection last 24hrs like Hanna's, reminds me of Wilma in that regard, tenacious convection thats for sure!

[HURAKAN]

What a difference 24 hrs make!!

[deltadog03]

This thing is truely very large...(sorry Hanna, your a big gurl) And all along, models strengthened it. I mean good lord look at the DEEEEP reds and the GREY...shear dies off its off to the races..Cat 3 will def. be possible.

[storms in NC]

Here is Floyd 1999


[img][/img]

[Ivanhater]

This thing is truely very large...(sorry Hanna, your a big gurl) And all along, models strengthened it. I mean good lord look at the DEEEEP reds and the GREY...shear dies off its off to the races..Cat 3 will def. be possible.

Shes hungry!

[Aric Dunn]

This thing is truely very large...(sorry Hanna, your a big gurl) And all along, models strengthened it. I mean good lord look at the DEEEEP reds and the GREY...shear dies off its off to the races..Cat 3 will def. be possible.

well the upper environment right now is helping the the intense convection .. as the extreme divergence around hanna is causing lot of lift

[Windy]

TWC just put up a graphic with only Northern FL just in the cone, must of it heading to SC/NC.

To me that is terrible forecasting when the NHC has South FL to NC in the cone and just made a statement that they are not sure where it is heading but anybody from South Florida to NC should pay attention

Anybody watching TWC in FL (Central or South) would get a false sense of confidence with the TWC forecast.

You have to remember that TWC is an independant team of forecasters with their own forecasting methodologies. They're not obligated to reproduce the NHC forecasts. Unfortunately, unlike the NHC, they don't publish statistical verification information for their forecasts, though I'm sure they gather it.

[deltadog03]

This thing is truely very large...(sorry Hanna, your a big gurl) And all along, models strengthened it. I mean good lord look at the DEEEEP reds and the GREY...shear dies off its off to the races..Cat 3 will def. be possible.

well the upper environment right now is helping the the intense convection .. as the extreme divergence around hanna is causing lot of lift

Well, I agree with you on that...I still think she will maintain this size for sure. Globals show this too be a very large one.

[storms in NC]

Georgia hasn't been hit by a hurricane since 1893...

savannah/georgia coast
If there's ever been an area within the southeastern coast of the U.S. that has been lucky from getting hit by major hurricanes recently, its been the Georgia coast. Major storms such as Hugo, Fran, and Floyd all stayed north of Georgia affecting the Carolina coasts. The last time a hurricane made landfall along the Georgia coast was 1979 when David came in at Savannah Beach as a strong category 1 storm with winds around 90 mph and a storm surge up to 5 feet. The city of Savannah reported a maximum sustained wind of 58 mph. They also picked up close to 7 inches of rain. No major damage was reported there. The 1940s were an active decade for hurricanes in Georgia. In 1947, a category 1 hurricane approached from the due west and slammed right to the south of Savannah with the storm surge helping to cause a lot of damage along the city's riverfront to warehouses. A similiar situation occured in 1940 as a category 1 hurricane came in from the east killing 50. But the last major hurricane to hit Georgia was in 1893 when a category 3 struck near Brunswick and it helped bring a storm surge that inundated the city in a half a foot of water for 12 hours. 2,000 people were killed in that hurricane in the south Atlantic region.

Read the rest here
http://www.angelfire.com/ga/mrsweather/atlweather.html

Friendly correction:

According to this official list, the 1940 and 1947 hurricanes were Category 2 (not Category 1) hurricanes at landfall...

http://www.aoml.noaa.gov/hrd/hurdat/ushurrlist18512007.txt

Tell them Not me. I didn't write it. That is why I put in the site.

[NCWeatherChic]

'Nother question...I did know where to go to get the mileage from one point to another. I know as a crow flies we are 88 miles from Wilmington, but I am trying to find the distance between here (Benson, NC) and Savannah, GA. Anyone know where I might find that info?


Angela