[Tropical] Tropical Weather Discussion

[EMWIN Server]

AXNT20 KNHC 251750
TWDAT

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
205 PM EDT SUN APR 25 2010

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...METEOROLOGICAL ANALYSIS...WEATHER
OBSERVATIONS...AND RADAR.

BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
1715 UTC...

...ITCZ...
THE ITCZ IS CENTERED ALONG 7N12W 2N30W 2N52W. WIDELY SCATTERED
MODERATE CONVECTION IS OFF THE COAST OF WEST AFRICA FROM 2N-5N
BETWEEN 9W-13W. ISOLATED MODERATE CONVECTION IS FROM 2N-4N
BETWEEN 24W-29W. SCATTERED MODERATE CONVECTION IS FROM EQ-4N
BETWEEN 38W-43W...AND ALONG THE COAST OF SOUTH AMERICA FROM
EQ-7N BETWEEN 49W-56W.

...DISCUSSION...

GULF OF MEXICO...
AS OF 1500 UTC...A COLD FRONT EXTENDS FROM THE FLORIDA PANHANDLE
TO S TEXAS ALONG 31N85W 29N90W 27N99W. RADAR IMAGERY PRESENTLY
SHOWS A PREFRONTAL SQUALL LINE OVER N FLORIDA AND THE NE GULF OF
MEXICO ALONG 31N82W 28N85W. SCATTERED MODERATE CONVECTION WITH
FREQUENT LIGHTNING ARE WITHIN 15 NM OF THE SQUALL LINE. FURTHER
S...A 1007 MB LOW IS CENTERED OVER THE BAY OF CAMPECHE NEAR
21N92W. A SURFACE TROUGH EXTENDS FROM THE SQUALL LINE TO THE LOW
CENTER TO S MEXICO NEAR 18N95W. 10-15 KT NW SURFACE WINDS ARE N
OF THE TROUGH WHILE 10-15 KT SE WINDS ARE S OF THE TROUGH. IN
THE UPPER LEVELS...AN UPPER LEVEL RIDGE IS OVER THE GULF WITH
AXIS ALONG 81W PRODUCING MOSTLY SW FLOW. CONSIDERABLE UPPER
LEVEL HIGH CLOUDS AND UPPER LEVEL MOISTURE ARE OVER THE E GULF E
OF 90W. STRONG SUBSIDENCE IS OVER THE REMAINDER OF THE GULF.
EXPECT IN 24 HOURS...FOR THE COLD FRONT TO EXTEND FROM CENTRAL
FLORIDA TO THE YUCATAN PENINSULA WITH CONVECTION.

CARIBBEAN SEA...
FRESH TO STRONG TRADEWINDS ARE OVER THE CARIBBEAN SEA WITH
STRONGEST WINDS ALONG THE COASTS OF N COLOMBIA AND VENEZUELA. A
1007 MB LOW IS CENTERED OVER N COLOMBIA NEAR 8N74W. SCATTERED
SHOWERS ARE E OF THE CENTER OVER LAKE MARACAIBO. CLUSTERS OF
SCATTERED MODERATE CONVECTION IS ARE ALONG THE COASTS OF PANAMA
...COSTA RICA...AND NICARAGUA. THE TAIL END OF A DISSIPATING
STATIONARY FRONT IS OVER THE LEEWARD ISLANDS FROM 18N60W TO
16N66W. SCATTERED SHOWERS ARE WITHIN 15 NM OF THE FRONT. MOSTLY
FAIR WEATHER IS OVER THE WINDWARD ISLANDS. IN THE UPPER
LEVELS...AN UPPER LEVEL HIGH IS CENTERED NE NICARAGUA PRODUCING
ANTICYCLONIC UPPER LEVEL WINDS OVER THE ENTIRE CARIBBEAN.
EXPECT THE COLD FRONT TO BE OVER THE YUCATAN PENINSULA IN 24
HOURS WITH CONVECTION.

ATLANTIC OCEAN...
A 1019 MB HIGH IS CENTERED E OF THE BAHAMAS NEAR 28N66W MOVING E.
A SERIES OF FRONTS ARE OVER THE CENTRAL ATLANTIC ALL CONNECTED
TO SEPARATE PARENT SURFACE LOWS N OF THE AREA. A FORMING COLD
FRONT EXTENDS FROM 32N43W TO 29N47W 28N52W. GALE FORCE WINDS ARE
W OF THIS FRONT. A COLD FRONT IS FURTHER E ALONG 32N39W 26N46W
23N59W. A DISSIPATING STATIONARY FRONT IS FURTHER E ALONG 32N35W
21N50W 18N60W. ISOLATED MODERATE CONVECTION IS WITHIN 120 NM E
OF THE FRONT N OF 24N. A SURFACE RIDGE IS OVER THE E ATLANTIC
WITH AXIS ALONG 30N20W 17N37W. IN THE UPPER LEVELS...AN UPPER
LEVEL RIDGE IS OVER THE W ATLANTIC W OF 65W. AN UPPER LEVEL
TROUGH IS OVER THE CENTRAL ATLANTIC N OF 10N BETWEEN 45W-65W.
AN UPPER LEVEL RIDGE IS OVER THE E ATLANTIC E OF 45W. AN UPPER
LEVEL HIGH IS CENTERED OVER THE TROPICAL ATLANTIC NEAR 5N35W.
EXPECT IN 24 HOURS FOR ALL FRONTS TO MOVE E WITH SHOWERS OR
CONVECTION.

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

$$
FORMOSA







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