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EPAC Tropical Action 2011


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HURRICANE ADRIAN DISCUSSION NUMBER 10

NWS NATIONAL HURRICANE CENTER MIAMI FL EP012011

200 PM PDT THU JUN 09 2011

DURING MOST OF THE DAY...ADRIAN HAS MAINTAINED A VERY DISTINCT EYE

EMBEDDED WITHIN A SYMMETRIC CENTRAL DENSE OVERCAST WRAPPED BY A

CYCLONICALLY CURVED CONVECTIVE BAND. RECENTLY...THE CONVECTIVE BAND

HAS WEAKENED...AND THE CLOUD PATTERN IS BEGINNING TO RESEMBLE AN

ANNULAR HURRICANE WITH A LARGE EYE AND A CDO. THE OUTFLOW CONTINUES

TO BE WELL ESTABLISHED MAINLY TO THE SOUTH AND WEST. SATELLITE

INTENSITY ESTIMATES FROM BOTH TAFB AND SAB CONTINUE TO SUPPORT AN

INITIAL INTENSITY OF 100 KNOTS.

THE HURRICANE HAS THE OPPORTUNITY TO STRENGTHEN A LITTLE MORE...BUT

SINCE ADRIAN IS BECOMING ANNULAR...IT WILL PROBABLY FLUCTUATE

LITTLE IN INTENSITY AND WILL NOT WEAKEN UNTIL THE CIRCULATION

BECOMES WELL EMBEDDED WITHIN STABLE AIR AND COOLER WATERS IN A

COUPLE OF DAYS.

ADRIAN CONTINUES TO MOVE TOWARD THE WEST-NORTHWEST OR 285 DEGREES AT

8 KNOTS...TRAPPED ON THE SOUTH SIDE OF A RATHER STRONG MID-LEVEL

RIDGE OVER THE SOUTHWEST UNITED STATES AND NORTHERN MEXICO. THE

AFOREMENTIONED RIDGE IS FORECAST TO CONTINUE EXPANDING FARTHER

WESTWARD BY MOST OF THE GLOBAL MODELS. THIS STEERING PATTERN SHOULD

FAVOR A CONTINUED WEST-NORTHWESTWARD TRACK OF THE HURRICANE FOR THE

NEXT 3 TO 4 DAYS. ADRIAN COULD TURN MORE TOWARD THE WEST AS IT

WEAKENS AND BECOMES STEERED BY THE LOW-LEVEL FLOW. THE RELIABLE

NUMERICAL GUIDANCE HAS NOT CHANGED SIGNIFICANTLY FROM EARLIER RUNS

AND CONTINUES TO CALL FOR A GENERAL WEST-NORTHWEST TRACK AWAY FROM

THE COAST OF MEXICO.

FORECAST POSITIONS AND MAX WINDS

INIT 09/2100Z 14.4N 104.9W 100 KT 115 MPH

12H 10/0600Z 14.7N 106.1W 105 KT 120 MPH

24H 10/1800Z 15.0N 107.5W 100 KT 115 MPH

36H 11/0600Z 15.5N 109.0W 95 KT 110 MPH

48H 11/1800Z 15.8N 110.5W 85 KT 100 MPH

72H 12/1800Z 16.5N 112.5W 60 KT 70 MPH

96H 13/1800Z 17.0N 113.5W 40 KT 45 MPH

120H 14/1800Z 18.5N 116.0W 30 KT 35 MPH

$$

FORECASTER AVILA

post-32-0-95341700-1307652717.jpg

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000WTPZ61 KNHC 092235TCUEP1HURRICANE ADRIAN TROPICAL CYCLONE UPDATENWS NATIONAL HURRICANE CENTER MIAMI FL EP012011330 PM PDT THU JUN 09 2011 ...HURRICANE ADRIAN REACHES CATEGORY FOUR STRENGTH...SATELLITE IMAGES OVER THE PAST FEW HOURS INDICATE HURRICANEADRIAN HAS CONTINUED TO STRENGTHEN...AND SATELLITE INTENSITYESTIMATES NOW SUPPORT AN INTENSITY OF 115 KT OR 130 MPH...210 KM/H. THIS MAKES ADRIAN A CATEGORY 4 HURRICANE ON THESAFFIR-SIMPSON HURRICANE WIND SCALE....SUMMARY OF 330 PM PDT...2230 UTC...INFORMATION...LOCATION...14.5N 105.2WABOUT 320 MI...520 KM S OF MANZANILLO MEXICOMAXIMUM SUSTAINED WINDS...130 MPH...210 KM/HPRESENT MOVEMENT...WNW OR 285 DEGREES AT 9 MPH...15 KM/HMINIMUM CENTRAL PRESSURE...950 MB...28.05 INCHES$FORECASTER STEWART/ROBERTS

Up to 130mph now.

Yea I thought Alvia's forecast was a little bit on the low side... this thing is trying to pull a Celia currently.

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Adrian will be upgraded to 120 kts (140 mph) at 11 pm.

EP, 01, 2011061000, , BEST, 0, 145N, 1054W, 120, 946, HU, 34, NEQ, 80, 80, 70, 80, 1008, 180, 15, 0, 0, E, 0, , 0, 0, ADRIAN, D,

This is probably the strongest annular cane since Isabel back in 2003.

Can we say it's annular?

edit: someone on S2K just said this:

"Let's clear this up: this storm isn't annular, only annular-like. SHIPS annularity index at 00Z shows the storm passed 6 out of 7 requirements to be considered annular."

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Avila and Stewart suggest otherwise. I tend to believe what the NHC Senior forecasters have to say.;)

ADRIAN HAS INTENSIFIED 85 KT OVER THE PAST 48 HOURS...AND IS LIKELY

NEAR PEAK INTENSITY SINCE SUCH LONG DURATION RAPID INTENSIFICATION

EVENTS ARE QUITE RARE. HAVING SAID THAT...MICROWAVE SATELLITE

IMAGERY INDICATES THAT ADRIAN HAS STABILIZED AS AN ANNULAR

HURRICANE WITH A 20-25 NMI DIAMETER EYE. WITH NO CURRENT

INDICATIONS THAT AN EYEWALL REPLACEMENT CYCLE IS ABOUT TO BEGIN...

SOME ADDITIONAL STRENGTHENING IS POSSIBLE DURING THE NEXT 12 HOURS

OR SO AS THE HURRICANE REMAINS OVER SSTS OF AT LEAST 28C AND IN

LIGHT VERTICAL SHEAR CONDITIONS OF 5 KT OR LESS.

post-32-0-47470200-1307673798.jpg

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Seriously!

It got to the point where you couldn't use the A-word around here without being ridiculed. It's almost funny to see a qualified professional using it. :lmao:

I got taken to the woodshed last year for mentioning that Igor had some ****lar characteristics.

I'll never use the word again. I'm still scarred and traumatized. :(

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Seriously how could it be

1# ANNULAR and go through a ewrc

2# In start a ewrc at the time of the forecast being typed by the top hurricane experts on earth as they say there is NO sign of one or one even close to starting one...

I agree it does appear to have peaked in intensity.

http://www.ssd.noaa..../flash-vis.html

Last 3 frames. I may have spoken early, but it does seem like it. Also, the discussion was put out before the eye started to fluctuate in structure.

Though, I was probably wrong.

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steady state annulars are weirdoes...although at least this one has a bit of a tail

They're very weird.

I was saying to Adam today that I have trouble imagining what one would be like on the ground. Like, in a typical 'cane, you really notice the banding on the ground-- it starts with brief squalls separated by periods of light rain and relative calm, and as you get closer to the center, the squalls become rougher and closer together, and then you get raked by the core. So, would none of that happen in an annular? Do you just jump right into the action with no build-up? I wonder.

I also wonder what it would look like on radar. I’m not aware of any landfalling annulars.

I gotta get me some annular action. :sun:

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They're very weird.

I was saying to Adam today that I have trouble imagining what one would be like on the ground. Like, in a typical 'cane, you really notice the banding on the ground-- it starts with brief squalls separated by periods of light rain and relative calm, and as you get closer to the center, the squalls become rougher and closer together, and then you get raked by the core. So, would none of that happen in an annual? Do you just jump right into the action with no build up? I wonder.

I also wonder what it would look like on radar. I’m not aware of any landfalling annulars.

I bet if we scoured the web and academic journals we'd find some radar from recon flights into storms such as Isabel and Luis.

I gotta get me some annular action. :sun:

I doubt it ever happens for you unless you buy a boat. I'm not sure we'll ever see a real landfalling annular.

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I feel like writing them a stern letter telling them that they need to step their game up, but something tells me they wouldn't care.

I know they'e had major server issues and it was reported to have been corrected. I beginning to wonder, though.

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