Cone has Keys Under the Gun. Winds near TS.
Posted by JAC on 7/22/2010, 11:04 am



BULLETIN
TROPICAL DEPRESSION THREE ADVISORY NUMBER   1
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL     AL032010
1100 AM EDT THU JUL 22 2010

...TROPICAL DEPRESSION FORMS IN THE BAHAMAS...AIR FORCE
RECONNAISSANCE PLANE EN ROUTE...


SUMMARY OF 1100 AM EDT...1500 UTC...INFORMATION
-----------------------------------------------
LOCATION...21.9N 75.0W
ABOUT 265 MI...425 KM SE OF NASSAU
ABOUT 405 MI...655 KM ESE OF KEY LARGO FLORIDA
MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/HR
PRESENT MOVEMENT...WNW OR 295 DEGREES AT 15 MPH...24 KM/HR
MINIMUM CENTRAL PRESSURE...1008 MB...29.77 INCHES


WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY...

THE GOVERNMENT OF THE BAHAMAS HAS ISSUED A TROPICAL STORM WARNING
FOR THE CENTRAL AND NORTHWESTERN BAHAMAS.

A TROPICAL STORM WARNING HAS BEEN ISSUED FOR THE FLORIDA EAST COAST
FROM GOLDEN BEACH SOUTHWARD INCLUDING THE ENTIRE FLORIDA KEYS AND
FLORIDA BAY...AND ALONG THE WEST COAST OF FLORIDA NORTHWARD TO
BONITA BEACH.

A TROPICAL STORM WATCH HAS BEEN ISSUED FOR THE EAST COAST OF FLORIDA
FROM NORTH OF GOLDEN BEACH TO JUPITER INLET INCLUDING LAKE
OKEECHOBEE.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT...

A TROPICAL STORM WARNING IS IN EFFECT FOR...
* CENTRAL AND NORTHWESTERN BAHAMAS
* FOR THE FLORIDA EAST COAST FROM GOLDEN BEACH SOUTHWARD INCLUDING
THE ENTIRE FLORIDA KEYS AND FLORIDA BAY...AND ALONG THE WEST COAST
OF FLORIDA NORTHWARD TO BONITA BEACH

A TROPICAL STORM WATCH IN IN EFFECT FOR...
* THE EAST COAST OF FLORIDA NORTH OF GOLDEN BEACH TO JUPITER INLET
INCLUDING LAKE OKEECHOBEE

A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE
EXPECTED SOMEWHERE WITHIN THE WARNING AREA WITHIN 36 HOURS.

A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE
POSSIBLE WITHIN THE WATCH AREA...GENERALLY WITHIN 48 HOURS.

FOR STORM INFORMATION SPECIFIC TO YOUR AREA IN THE UNITED
STATES...INCLUDING POSSIBLE INLAND WATCHES AND WARNINGS...PLEASE
MONITOR PRODUCTS ISSUED BY YOUR LOCAL NATIONAL WEATHER SERVICE
FORECAST OFFICE. FOR STORM INFORMATION SPECIFIC TO YOUR AREA OUTSIDE
UNITED STATES...PLEASE MONITOR PRODUCTS ISSUED BY YOUR NATIONAL
METEOROLOGICAL SERVICE.


DISCUSSION AND 48-HOUR OUTLOOK
------------------------------
AT 1100 AM EDT...1500 UTC...THE CENTER OF NEWLY FORMED TROPICAL
DEPRESSION THREE WAS LOCATED NEAR LATITUDE 21.9 NORTH...LONGITUDE
75.0 WEST. THE DEPRESSION IS MOVING TOWARD THE WEST-NORTHWEST NEAR
15 MPH...24 KM/HR. THIS GENERAL MOTION WITH AN INCREASE IN FORWARD
SPEED IS EXPECTED DURING THE NEXT 48 HOURS.

MAXIMUM SUSTAINED WINDS ARE NEAR 35 MPH...55 KM/HR...WITH HIGHER
GUSTS.  THE DEPRESSION COULD BECOME A TROPICAL STORM LATER TODAY.

ESTIMATED MINIMUM CENTRAL PRESSURE IS 1008 MB...29.77 INCHES.


HAZARDS AFFECTING LAND
----------------------
WIND...WINDS NEAR TROPICAL STORM FORCE ARE ALREADY AFFECTING
PORTIONS OF THE SOUTHEASTERN BAHAMAS. TROPICAL STORM CONDITIONS
WILL GRADUALLY SPREAD OVER THE CENTRAL AND NORTHWESTERN BAHAMAS
TONIGHT AND FRIDAY. WEATHER CONDITIONS WILL BEGIN TO DETERIORATE ON
THE FLORIDA COAST AND FLORIDA KEYS WITHIN THE WARNING AREA ON
FRIDAY.

RAINFALL...THE DEPRESSION IS EXPECTED TO PRODUCE TOTAL RAIN
ACCUMULATIONS OF OF 2 TO 4 INCHES OVER SOUTH FLORIDA...WITH
POSSIBLE ISOLATED MAXIMUM AMOUNTS OF 5 TO 6 INCHES.  RAINFALL
AMOUNTS OF 3 TO 5 INCHES ARE EXPECTED OVER THE CENTRAL AND
NORTHWEST BAHAMAS...WITH POSSIBLE ISOLATED AMOUNTS OF 5 TO 7
INCHES.

STORM SURGE...STORM SURGE WILL RAISE WATER LEVELS BY AS MUCH AS 1 TO
2 FEET ABOVE GROUND LEVEL OVER PORTIONS OF THE BAHAMAS AND THE
FLORIDA KEYS.


NEXT ADVISORY
-------------
NEXT INTERMEDIATE ADVISORY...200 PM EDT.
NEXT COMPLETE ADVISORY...500 PM EDT.

$$
FORECASTER AVILA/ROBERTS



TROPICAL DEPRESSION THREE DISCUSSION NUMBER   1
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL   AL032010
1100 AM EDT THU JUL 22 2010

THE TROPICAL WAVE/DISTURBANCE THAT NHC HAS BEEN TRACKING FOR THE
PAST SEVERAL DAYS ACROSS THE ATLANTIC HAS DEVELOPED A SURFACE
CIRCULATION AND ENOUGH ORGANIZED CONVECTION TO BE CLASSIFIED AS A
TROPICAL DEPRESSION. THE DEPRESSION IS SHEARED AT THIS TIME AND ITS
CENTER IS LOCATED ON THE SOUTHWEST SIDE OF A CYCLONICALLY CURVED
CONVECTIVE BAND. THE SHEAR APPEARS TO BE RELAXING A
LITTLE...HOWEVER...AS INDICATED BY THE MOTION OF THE HIGH CLOUDS ON
HIGH RESOLUTION IMAGES. THE CYCLONE IS STILL INTERACTING WITH A
STRONG WESTWARD-MOVING UPPER LOW TO THE WEST. THIS PATTERN WOULD
ONLY ALLOW THE DEPRESSION TO STRENGTHEN A LITTLE AS INDICATED IN
THE OFFICIAL FORECAST...BUT THIS FORECAST IS UNCERTAIN. IN FACT...
NONE OF THE MODELS SHOW SIGNIFICANT INTENSIFICATION.

BECAUSE THE CENTER JUST FORMED...THE INITIAL MOTION IS UNCERTAIN.
THE BEST ESTIMATE IS TOWARD THE WEST-NORTHWEST OR 295 DEGREES AT 13
KNOTS. GLOBAL MODELS FORECAST A WELL-ESTABLISHED SUBTROPICAL RIDGE
EXTENDING FROM THE ATLANTIC WESTWARD ACROSS THE SOUTHERN UNITED
STATES.  THIS STEERING PATTERN SHOULD KEEP THE CYCLONE ON A GENERAL
WEST-NORTHWESTWARD TRACK THROUGH 3 TO 4 DAYS ACROSS THE FLORIDA
STRAITS AND THE KEYS AND THEN INTO THE GULF OF MEXICO. BECAUSE THE
RIDGE IS FORECAST TO STRENGTHEN...THE CYCLONE SHOULD BEGIN TO
INCREASE ITS FORWARD SPEED. THE TRACK GUIDANCE IS TIGHTLY CLUSTERED
THROUGH 4 OR 5 DAYS...ALTHOUGH SOME MODELS WEAKEN THE CYCLONE
EARLIER.

AN AIR FORCE PLANE WILL BE IN THE AREA THIS AFTERNOON AND WILL HELP
TO DETERMINE IF THE SYSTEM HAS BECOME A TROPICAL STORM.


FORECAST POSITIONS AND MAX WINDS

INITIAL      22/1500Z 21.9N  75.0W    30 KT
12HR VT     23/0000Z 22.6N  76.8W    35 KT
24HR VT     23/1200Z 23.8N  80.0W    40 KT
36HR VT     24/0000Z 25.0N  83.2W    40 KT
48HR VT     24/1200Z 26.0N  86.5W    40 KT
72HR VT     25/1200Z 28.0N  91.5W    45 KT
96HR VT     26/1200Z 31.0N  94.0W    25 KT...INLAND
120HR VT     27/1200Z 33.0N  95.0W    20 KT...POST-TROP/REMNT LOW

$$
FORECASTER AVILA/ROBERTS
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97L is now TD03 - JAC, 7/22/2010, 8:56 am
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