Hurricane Wilma Thread

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ViRGE

Elite Member, Moderator Emeritus
Oct 9, 1999
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Pressure's up to 899mb, she's weakening a bit.
 

WyteWatt

Banned
Jun 8, 2001
6,255
0
0
Originally posted by: ViRGE
Pressure's up to 899mb, she's weakening a bit.


Yep but has anyone seen a hurricane like this that stays below 900 MB for this long? This has to be some kind of record. Don't even think Gilbert did that.

I sure haven't
 

ViRGE

Elite Member, Moderator Emeritus
Oct 9, 1999
31,516
167
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Originally posted by: imtim83
Originally posted by: ViRGE
Pressure's up to 899mb, she's weakening a bit.


Yep but has anyone seen a hurricane like this that stays below 900 MB for this long? This has to be some kind of record. Don't even think Gilbert did that.

I sure haven't
It's possible it's a record, I don't know. I don't have any records of Gilbert's pressure over time.
 

ViRGE

Elite Member, Moderator Emeritus
Oct 9, 1999
31,516
167
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5am update: finally an ERC kicks in and she's down to Cat 4, but she'll likely reach Cat 5 again when it's done. Overall the bitch is rather slow, I might add.

HURRICANE WILMA DISCUSSION NUMBER 20
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
5 AM EDT THU OCT 20 2005

AS ANTICIPATED...WILMA IS GOING THROUGH THE WEAKENING PHASE OF AN
EYEWALL CYCLE. THIS IS BASED ON MICROWAVE DATA AND OBSERVATIONS
FROM A RECONNAISSANCE PLANE WHICH REPORTED EXCELLENT RADAR
PRESENTATION OF CONCENTRIC EYEWALLS OF 4 AND 40 N MI IN DIAMETER
RESPECTIVELY. THE PLANE ALSO OBSERVED TWO MAXIMUM WIND BANDS...ONE
WITH WINDS OF 121 KNOTS...AND A MINIMUM PRESSURE OF 903 MB MEASURED
BY A SONDE...BUT WITH 23 KNOTS AT THE SURFACE. THE PRESSURE COULD
THEN BE A FEW MILLIBARS LOWER. SATELLITE IMAGES INDICATE THAT
THE CLOUD PATTERN IS NOT AS SPECTACULAR AS IT WAS 12 TO 18 HOURS
AGO AND IN FACT...THE EYE IS OBSCURED AT THIS TIME. THE INITIAL
INTENSITY IS ADJUSTED DOWN TO 130 KNOTS. THIS MAY BE AN OVERESTIMATE
SINCE THE MAXIMUM WINDS REPORTED SO FAR ARE 121 KNOTS. HOWEVER...WE
ARE ASSUMING THAT THE PLANE HAS NOT SAMPLED THE ENTIRE CIRCULATION.

WE DO NOT KNOW EXACTLY WHEN AND IF THE STRENGTHENING PHASE OF THE
EYEWALL REPLACEMENT CYCLE WILL BEGIN. SINCE IT IS ASSUMED THAT IT
WILL OCCUR WITHIN THE NEXT 12 TO 24 HOURS...RE-INTENSIFICATION IS
FORECAST DURING THIS PERIOD. I WOULD NOT BE SURPRISED IF WE SEE THE
FORMATION OF A LARGE EYE LATER TODAY. THEREAFTER...A PORTION OF THE
CIRCULATION WILL BE INTERACTING WITH THE YUCATAN PENINSULA AND
THERE WILL BE INCREASING WIND SHEAR. WILMA SHOULD THEN BEGIN A
STEADY WEAKENING TREND.

THE EXPECTED NORTHWEST TURN HAS NOT MATERIALIZED YET AND THE AVERAGE
MOTION OF WILMA IS STILL 295 DEGREES AT 7 KNOTS. HOWEVER...THE
NORTHWEST MOTION SHOULD BEGIN SOON AS THE SHORT WAVE OVER THE WEST
CENTRAL UNITED STATES ADVANCES RAPIDLY EASTWARD. THIS WAVE IS
EXPECTED TO CREATE A WEAKNESS OVER THE GULF OE MEXICO AND WILMA
SHOULD TURN TO THE NORTHWEST AND NORTH TOWARD THE WEAKNESS. THE
SHORT-WAVE IS EXPECTED TO AMPLIFY AND BRING THE WESTERLY FLOW SOUTH
ENOUGH TO CARRY WILMA TOWARD THE NORTHEAST. BEFORE THE WESTERLIES
BECOME ESTABLISHED...THE STEERING CURRENTS ARE EXPECTED TO BE WEAK.
WILMA WILL LIKELY MEANDER FOR A DAY OR SO OVER NORTHEASTERN YUCATAN
OR THE YUCATAN CHANNEL BEFORE TAKING OFF TOWARD THE NORTHEAST AS IN
A TYPICAL RECURVATURE PATTERN.

TRACK GUIDANCE IS SHOWING THE USUAL VARIABILITY BUT THE OVERALL
MODEL CONSENSUS IS TO KEEP WILMA MOVING VERY SLOWLY NEAR OR OVER
NORTHEASTERN YUCATAN FOR THE NEXT TWO DAYS AND THEN SHARPLY TURNING
THE HURRICANE TOWARD THE NORTHEAST. IT IS FAIR TO SAY THAT BY DAY
FIVE...WILMA SHOULD BEGIN TO ACQUIRE EXTRATROPICAL CHARACTERISTICS
BY JUDGING THE EXPANSION OF THE WIND FIELD AND THE FRONTAL LIKE
MOISTURE PATTERN IN MODELS.

FORECASTER AVILA
 

ViRGE

Elite Member, Moderator Emeritus
Oct 9, 1999
31,516
167
106
More from Mill:
Originally posted by: Mill
It is going to take a couple of model runs to get things back to being certain. An earlier recon mission tonight was canceled, so once again there is a data gap in relation to dropsonde measurements. I think Wilma is going to change structure a good bit here soon, as the inner eyewall is finally dying off, and a 40nm eyewall is replacing that. This leads me to believe that the swath of Hurricane Force winds will increase, but the intensity will decline. Latest recon has pressure up to 899mb with the highest wind reading of about 125mph. It no doubt will have the winds come back up when the ERC completes and that 40nm eye is fully-structured. The pressure should continue to rise, and any major strengthening is done for until after it makes landfall or brushes the Yucatan. Reasoning being the structure changes, possible dry-air intrusion, interaction with land, and lower SSTs. I don't expect it to decrease below Cat 4. intensity until it brushes or make landfall with the Yucatan, and if it tracks into Florida (which it should), then it should be a Cat. 3. The question is WHERE in Florida, and if it will be weakening or strengthening at that time. SSTs are lower like I mentioned, but if it maintains a decent structure after interaction with the Yucatan, then they are favorable for re-strengthening, albeit at a much slower rate than the Bomb we saw last night. The big question is if any shear comes about, and if it does that could easily not allow it to retain Cat. 4 strength after brushing or landing on the Yucatan, and then it would make landfall as a weaker storm in Florida. The question of how strong will come down to the factors I mentioned above. How much will the interaction with Cuba and/or the Yucatan play on its structure. Will that allow dry air in and help prevent it from strengthening? Will shear come into play and help keep it at a moderate Major Hurricane? Until some more recon data comes in, and new dropsonde and sounding data is fed into the models -- the strength and positioning of Wilma is at the educated guessing level. The SSTs are lower being that it is October and all, but they provide enough heat content to support a Major Hurricane into Florida -- if shear, dry air, and structure allow it. My best guess right now on strength is a moderate to low end Cat. 3 into Florida. As for where, I couldn't do anymore than to throw darts. From Tampa, South to the Keys appears to be about the best guess. By 6pm tommorrow the forecast should be clearer as far as locationing is concerned, but the strength aspect could harder to read.

Contrary to what Dave believes, the NHC knows what they are doing, and they review a LOT more data than we have access to, even with the amount of Pro Mets and the advent of the Interne giving us loads of data. We don't have access to the FSU Superensemble until typically a day after they do, and even then only when someone with access posts it. That's the key model they use, and as you see -- if data isn't entered into the GFS or other models they don't have a lot of accuracy or at least faith in that accuracy. Most of the models are hinting at a Yucatan landfall, or at least getting extremely close, a landfall anywhere from Tampa to Miami/The Keys, and then a re-emergence into the Atlantic. At least one model has a landfall on the Outerbanks of NC after that, and then a landfall in New England. Others have it brushing the Coast all the way up the Eastern Seaboard, while others have it going out to Sea. One thing is for sure, if it goes up toward the East Coast and becomes extra-tropical, it will likely increase speed to 30-60mph, and could bring a pretty severe storm up that way. Lord knows they don't need more rain, and the winds with such a forward speed could be quite severe and damaging. There's nothing currently indicating a Central Gulf Coast landfall no matter how much Dave wants one. <deleted line poking at Dave>

At best, we can hope for weakening before the Yucatan landfall/interaction, and then hope that the storm is unable to regain a decent structure, and makes landfall as a less than Major Hurricane in Florida. After that, everyone's best interests would be served by it going out to sea in the Atlantic and dying. If it decides to ride the Eastern Seaboard as a Hurricane or Extra-Tropical storm, I really would have to think it will cause a lot of problems. Air-Traffic snarls, power-outages, additional severe flooding, wind damage, beach erosion, and of course economic damage. Hopefully this won't occur, but outside of about 48 hours the forecast is very iffy right now.
 

dmcowen674

No Lifer
Oct 13, 1999
54,894
47
91
www.alienbabeltech.com
Originally posted by: ViRGE
More from Mill:
Originally posted by: Mill
It is going to take a couple of model runs to get things back to being certain.

Until some more recon data comes in, and new dropsonde and sounding data is fed into the models -- the strength and positioning of Wilma is at the educated guessing level.

The SSTs are lower being that it is October and all, but they provide enough heat content to support a Major Hurricane into Florida -- if shear, dry air, and structure allow it. My best guess right now on strength is a moderate to low end Cat. 3 into Florida.

As for where, I couldn't do anymore than to throw darts. From Tampa, South to the Keys appears to be about the best guess. By 6pm tommorrow the forecast should be clearer as far as locationing is concerned, but the strength aspect could harder to read.

Contrary to what Dave believes, the NHC knows what they are doing, and they review a LOT more data than we have access to, even with the amount of Pro Mets and the advent of the Interne giving us loads of data. We don't have access to the FSU Superensemble until typically a day after they do, and even then only when someone with access posts it. That's the key model they use, and as you see -- if data isn't entered into the GFS or other models they don't have a lot of accuracy or at least faith in that accuracy. Most of the models are hinting at a Yucatan landfall, or at least getting extremely close, a landfall anywhere from Tampa to Miami/The Keys, and then a re-emergence into the Atlantic. At least one model has a landfall on the Outerbanks of NC after that, and then a landfall in New England. Others have it brushing the Coast all the way up the Eastern Seaboard, while others have it going out to Sea. One thing is for sure, if it goes up toward the East Coast and becomes extra-tropical, it will likely increase speed to 30-60mph, and could bring a pretty severe storm up that way. Lord knows they don't need more rain, and the winds with such a forward speed could be quite severe and damaging. There's nothing currently indicating a Central Gulf Coast landfall no matter how much Dave wants one. <deleted line poking at Dave>

Odd, how come Mill can't post on his own Virge? He get added to the growing list of banned too???

Anyway that was all I was saying that at the time now 3 days ago the Models were indicating a right hand turn over Cuba to the Keys were off the mark and then the Models crashed 2 days later.

Meantime no one has been paying any attention to Alpha just east of the islands. It's looking like today it should at least be named.

I do not believe the door is closed yet on Wilma getting into the Central Gulf.

Tomorrow will be the tell tale sign of whether it hooks up with the occluded Low south of Chicago or not.
 

Mermaidman

Diamond Member
Sep 4, 2003
7,987
93
91
Question for the experts here:

According to the projected path, Wilma is expected to move fast Saturday - Monday. Does that mean significant weakening? Fast moving system=no time to gather strength?
 

dmcowen674

No Lifer
Oct 13, 1999
54,894
47
91
www.alienbabeltech.com
Originally posted by: Mermaidman
Question for the experts here:

According to the projected path, Wilma is expected to move fast Saturday - Monday. Does that mean significant weakening? Fast moving system=no time to gather strength?

All depends if it gets hooked up with that low or not.

The thing to remember is the origin of the energy.

As long as it is warm tropical water you have the equivalent of a giant upside down tornado (outflow). Lose that warm water source and it is just an ordinary large low not connected with the surface (no outflow).
 

rickn

Diamond Member
Oct 15, 1999
7,064
0
0
Originally posted by: Mermaidman
Question for the experts here:

According to the projected path, Wilma is expected to move fast Saturday - Monday. Does that mean significant weakening? Fast moving system=no time to gather strength?

I'm not an expert, but I am a floridian, so I'm very familiar with hurricanes. Wind shear can weaken a hurricane, a cold front is suppose to be coming down thru florida over the weekend and early next week. That could start to shear the hurricanes outflow. Dry air intrusion from the cold front could begin to get drawn into the hurricane, that could weaken it. also, water temps are about 80 degrees in the gulf, which is warm enough to sustain a hurricane, but probably not warm enough to create another monster like it was a day or two ago. Either way, if they put warnings up for my area, the shutters are going up!
 

dmcowen674

No Lifer
Oct 13, 1999
54,894
47
91
www.alienbabeltech.com
Originally posted by: rickn
Originally posted by: Mermaidman
Question for the experts here:

According to the projected path, Wilma is expected to move fast Saturday - Monday. Does that mean significant weakening? Fast moving system=no time to gather strength?

I'm not an expert, but I am a floridian, so I'm very familiar with hurricanes. Wind shear can weaken a hurricane, a cold front is suppose to be coming down thru florida over the weekend and early next week. That could start to shear the hurricanes outflow. Dry air intrusion from the cold front could begin to get drawn into the hurricane, that could weaken it. also, water temps are about 80 degrees in the gulf, which is warm enough to sustain a hurricane, but probably not warm enough to create another monster like it was a day or two ago. Either way, if they put warnings up for my area, the shutters are going up!

I wouldn't count on that dry air intrusion. Hopefully that will pan out but a lot depends on interaction with that low or not. Good luck Floridians.

My family is in Florida too, cousin just north of Naples and south of Port Charlotte, Charley was a pretty close strike last year, Tampa was just far enough north of the damage zone.

That was the thing about Katrina, the damage swath was so huge.
 

alien42

Lifer
Nov 28, 2004
12,668
3,067
136
the eye is heading right for cancun and cozumel and at this point there is no way they are going to get through wilma without some serious damage. there could also be a lot of deaths, including americans on vacation.
 

ViRGE

Elite Member, Moderator Emeritus
Oct 9, 1999
31,516
167
106
Originally posted by: imtim83
Thats not going to be pretty

Why do hurricanes target all the good areas ?
Because to humans, all the good areas are near the ocean and other bodies of water.
 

WyteWatt

Banned
Jun 8, 2001
6,255
0
0
Originally posted by: AbsolutZero
The only good thing Cozumel has going is the port and most of the hotels are all on the NW side of the island. It doesn't face the caribbean sea.

http://maps.google.com/maps?ll=20.45435...875763&spn=0.209331,0.300390&t=k&hl=en

Well thats a little bit of some good news. Though this hurricane still has that deadly Cat. 5 storm surge (Sense Wilma was a very strong Cat. 5 at one time the storm surge of a Cat. 5 can stsy with a hurricane for a while even if it drops down to a Cat. 3 hurricane. Takes a little while for the water to go down.)

 

AbsolutZero

Senior member
Oct 16, 2000
327
0
0
Originally posted by: imtim83
Originally posted by: AbsolutZero
The only good thing Cozumel has going is the port and most of the hotels are all on the NW side of the island. It doesn't face the caribbean sea.

http://maps.google.com/maps?ll=20.45435...875763&spn=0.209331,0.300390&t=k&hl=en

Well thats a little bit of some good news. Though this hurricane still has that deadly Cat. 5 storm surge (Sense Wilma was a very strong Cat. 5 at one time the storm surge of a Cat. 5 can stsy with a hurricane for a while even if it drops down to a Cat. 3 hurricane. Takes a little while for the water to go down.)

I think after seeing what Katrina did as a cat 4, I agree.
 

alien42

Lifer
Nov 28, 2004
12,668
3,067
136
looks like she may be taking a quick turn north which could still save cancun and cozumel from getting slammed by the eye.

its still not looking good for them though
 

ViRGE

Elite Member, Moderator Emeritus
Oct 9, 1999
31,516
167
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The NHC says it's strengthening, but she's doing a crappy job of it. The latest pressure reading is up 5mb to 923.
 

dmcowen674

No Lifer
Oct 13, 1999
54,894
47
91
www.alienbabeltech.com
They seem to be in a rush to make this thing "extratropical"

THE OLD LOW FROM BAJA CALIFORNIA...WILL MOVE PAST THE
LONGITUDE OF THE HURRICANE BY TOMORROW MORNING...AND THE TRACK
MODELS SHOW A SLIGHT BEND BACK TO THE LEFT
AS A LITTLE RIDGING
BUILDS IN BEHIND IT. IN FACT...THE GLOBAL MODELS ARE NOW
SUGGESTING THAT IT MAY TAKE THREE SHORT WAVES TO LIFT WILMA OUT OF
THE YUCATAN.

=============================================
This is all I was trying to point out but Mill kept saying this wouldn't happen.

My track is holding much better, still as usual.
 

jonnyGURU

Moderator <BR> Power Supplies
Moderator
Oct 30, 1999
11,815
102
106
I wish this thing would hurry up and figure out what it's going to do. They're saying they won't know for sure until SATURDAY?!?!

And to think, yesterday they said they'd know something by this morning.

Well... at least if it doesn't say it gets moving by Monday that it's not going to hit Florida because of a cold front expected to move in Tuesday.
 
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