[Tropical] Tropical Weather Discussion

[EMWIN Server]

AXNT20 KNHC 230527
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
105 AM EST MON JAN 23 2012

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS OF
SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST FROM THE
EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED ON SATELLITE
IMAGERY...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL
ANALYSIS.

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY
THROUGH 0515 UTC.

...THE ITCZ/THE MONSOON TROUGH...

THE MONSOON TROUGH PASSES THROUGH THE COAST OF SIERRA LEONE
NEAR 8N13W TO 6N17W. THE ITCZ CONTINUES FROM 6N17W TO 4N20W
2N30W...CROSSING THE EQUATOR ALONG 43W...INTO NORTHEASTERN
BRAZIL ALONG 50W FROM 1N TO 2N. ISOLATED TO WIDELY SCATTERED
MODERATE RAINSHOWERS ARE TO THE SOUTH OF 7N BETWEEN AFRICA
AND SOUTH AMERICA.

...DISCUSSION...

THE GULF OF MEXICO...
A DEEP LAYER TROUGH RUNS THROUGH THE CENTRAL U.S.A. THIS TROUGH
SUPPORTS A FRONTAL BOUNDARY THAT PASSES THROUGH CENTRAL OKLAHOMA
TO CENTRAL TEXAS...TO THE TEXAS BIG BEND. BROAD UPPER LEVEL
ANTICYCLONIC WIND FLOW COVERS THE GULF OF MEXICO. A SURFACE
RIDGE PASSES THROUGH CENTRAL FLORIDA...INTO THE CENTRAL AND
WEST CENTRAL GULF OF MEXICO.

THE CARIBBEAN SEA...
UPPER LEVEL NORTHWESTERLY-TO-WESTERLY WIND FLOW COVERS THE AREA.
COMPARATIVELY DRIER AIR SHOWS UP IN THE WATER VAPOR IMAGERY
ACROSS THE AREA. RAINSHOWERS ARE POSSIBLE IN A LINE OF CLOUDS
WITHIN 15 NM ON EITHER SIDE OF 15N72W 17N66W 17N64W...AND FROM
17N TO 20N BETWEEN 60W AND 64W...AND TO THE SOUTH OF 15N TO THE
EAST OF 72W.

THE ATLANTIC OCEAN...
A MIDDLE LEVEL TO UPPER LEVEL CYCLONIC CIRCULATION CENTER HAS
BEEN MOVING SOUTHWARD DURING THE LAST SIX HOURS...NOW NEAR
29N71W. THE CYCLONIC WIND FLOW THAT IS MOVING AROUND THIS CENTER
COVERS THE ATLANTIC OCEAN TO THE NORTH OF 20N BETWEEN 63W AND
THE SOUTHEASTERN CORNER OF THE U.S.A. A SURFACE TROUGH IS ALONG
31N68W 27N69W 23N72W. ISOLATED MODERATE RAINSHOWERS ARE FROM
21N TO 30N BETWEEN 65W AND 72W. A DEEP LAYER TROUGH IS ALONG
34N46W 28N46W 22N49W TO 17N52W. THIS TROUGH SUPPORTS
A STATIONARY FRONT THAT PASSES THROUGH 32N40W 26N40W 15N45W.
ONE SURFACE TROUGH PASSES THROUGH 32N45W TO 27N45W TO 22N49W.
A SECOND SURFACE TROUGH IS ALONG 26N49W 24N54W 26N57W. ISOLATED
MODERATE RAINSHOWERS COVER THE WATERS TO THE NORTH OF 20N
BETWEEN 37W AND 52W. A SURFACE RIDGE IS ALONG 14N30W 24N28W
BEYOND 32N28W.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
MT




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