#57 Postby KatDaddy » Wed Sep 14, 2005 6:18 am
AFDs not sure if its Invest 95 or the area of thunderstorms NNE of San Juan associated with a trough lifting out.
AFD Excerpts:
Houston-Galveston AFD
EXTEND-
ED GUIDANCE NOW INDICATING SOME POSSIBLE CHANGES TO THE CURRENT PAT-
TERN OF STRONG UPPER RIDGING ACROSS THE SRN U.S.. TANTALIZING WHISP-
ERS OF A COLD FRONT FOR NEXT THURS ABOUND...ALONG WITH PERHAPS A LIL
SOMETHING-SOMETHING APPROACHING FROM THE GULF. 41
Key West AFD:
SUNDAY NIGHT THROUGH TUESDAY...ALL MODELS INCLUDING THE LATEST LONG
RANGE UKMET FORECAST THE EVOLUTION OF A LOW PRESSURE TROUGH EAST OF
THE BAHAMAS...AND SOME BUT NOT ALL MODELS MOVE IT WESTWARD IN THE
GENERAL DIRECTION OF THE BAHAMAS AND FLORIDA. THERE IS DISAGREEMENT
BETWEEN MODELS REGARDING TIMING AND PLACEMENT OF THIS FEATURE WITH
THE UKMET HAVING IT STILL EAST OF BAHAMAS COME MONDAY...AND THE GFS
MOVING IT OVER THE KEYS DURING MONDAY. THE LATEST EUROPEAN MODEL IS
NOT AVAILABLE BUT THE PRIOR RUN WAS FASTEST WITH ITS PASSAGE OF A
TROUGH OVER THE KEYS DURING SUNDAY. BACK-TRACKING FROM THE VARIOUS
MODELS SOLUTIONS TO THE CURRENT TIME PUTS THAT EVENTUAL TROUGH IN
THE ATLANTIC WHERE NO CURRENT TROPICAL WAVE IS ANALYZED. THE STRONG
WAVE NOW OUT THERE IS CURRENTLY FARTHER EAST. SO WHILE THERE IS SOME
MODEL AGREEMENT THAT LOW PRESSURE TROUGH DEVELOPMENT MAY BE IN STORE
FOR EARLY NEXT WEEK EAST OF THE BAHAMAS...THERE IS A LOT OF
UNCERTAINTY IN TIMING, LOCATION, AND WHETHER ITS EVOLUTION WILL STEM
FROM ANY EXISTING TROPICAL WAVES WELL OUT IN THE ATLANTIC. NO CHANGE
WILL BE MADE AT THIS TIME TO ONGOING FORECASTS...BUT OF COURSE WIND
AND RAIN FORECASTS WILL NEED UPGRADING IF SUCH A TROUGH/WAVE
APPEARS. SORRY.
&&
.MARINE...
A LIGHT WIND PATTERN OUGHT TO STAY WITH US OVER KEYS WATERS THROUGH
THURSDAY...DUE TO A WEAK PRESSURE PATTERN. WIND DIRECTION MAY TEND
TO BE W TO NW FOR SOME STRETCHES OF TIME...BUT ATLANTIC SIDE WATERS
AND WATERS AROUND THE LOWER KEYS TO DRY TORTUGAS MAY BE QUITE
VARIABLE. STILL...LOOK FOR SPEEDS UNDER 10 KT. A TURN OF WINDS TO NE
TO E BUT STILL 10 KT OR LESS MAY BE IN STORE FRI-SAT AS A WEAK HIGH
PRESSURE RIDGE SETS UP A LITTLE TO OUR NORTH. WE NEED TO WATCH
TROPICAL DEVELOPMENTS EARLY NEXT WEEK AS VARIOUS MODELS SHOW A
TROPICAL WAVE OR TROUGH FORMING EAST OF...OR OVER...THE BAHAMAS.
IT'S TOO SOON TO BE SPECIFIC.
Miami AFD:
...AS WESTERN ATLANTIC RIDGE BUILDS TO THE
NORTH OF THE BAHAMAS. THE GFS AND NOGAPS CONTINUE TO SHOW MID
LEVEL CYCLOGENESIS ALONG A TROUGH LINE NORTH OF PUERTO RICO ON
FRIDAY. THIS FEATURE IS PROGGED TO DRAG A WEAK OPEN WAVE TROUGH WEST
THROUGH THE SOUTHERN BAHAMAS/EASTERN CUBA AND INTO THE STRAITS BY
MONDAY. HOWEVER...THE UKMET RECURVES THIS FEATURE EAST OF THE
BAHAMAS. IN ANY EVENT...THE EASTERLY FLOW WILL RAMP UP DEEP LAYER
MOISTURE THIS WEEKEND AND FAVOR INTERIOR AND WEST FOR AFTERNOON
CONVECTION. IF THE OPEN WAVE TROUGH DOES MIGRATE TO THE SOUTH BY
NEXT MONDAY...EXPECT RAINY PATTERN STARTING THE WEEKEND AND INTO
EARLY NEXT WEEK. CURRENT EXTENDED PACKAGE SHOWS STANDARD SCATTERED
CONVECTION. STILL PLENTY OF TIME TO MAKE ADJUSTMENTS AS THE STORY
ON THIS TROUGH EVOLVES.
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