[Tropical] Tropical Weather Discussion

[EMWIN Server]

AXNT20 KNHC 302346
TWDAT

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
705 PM EST WED DEC 30 2009

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 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
2315 UTC.

...THE ITCZ...
THE ITCZ AXIS IS CENTERED ALONG 6N10W 5N25W 3N40W 1N50W.
SCATTERED MODERATE TO STRONG CONVECTION IS ALONG THE COAST OF
BRAZIL FROM 2S-1N BETWEEN 46W-50W. SCATTERED SHOWERS ARE WITHIN
120 NM OF THE ITCZ BETWEEN 20W-46W.

...DISCUSSION...

GULF OF MEXICO...
AS OF 2100 UTC...A 1015 MB LOW IS CENTERED INLAND OVER LOUISIANA
NEAR 31N92W. A COLD FRONT EXTENDS S FROM THE LOW TO TAMPICO
MEXICO AT 22N97W. 10-15 KT NW WINDS ARE BEHIND THE FRONT. THE
REMAINDER OF THE GULF OF MEXICO HAS 10-15 KT SE RETURN FLOW.
IN THE UPPER LEVELS...A RIDGE WITH AXIS ALONG 80W IS PRODUCING
SW UPPER LEVEL FLOW OVER THE GULF. RADAR IMAGERY SHOWS RAIN AND
SHOWERS ALONG THE N GULF COAST FROM LOUISIANA TO THE FLORIDA
PANHANDLE N OF 29N. UPPER LEVEL MOISTURE WITH BROKEN HIGH CLOUDS
ARE OVER MOST OF THE GULF EXCEPT OVER TEXAS AND THE NW GULF W OF
THE FRONT. 90-110 KT 25O MB WINDS ARE NOTED OVER THE N GULF N OF
26N. EXPECT IN 24 HOURS...FOR THE SURFACE LOW MOVE TO S GEORGIA
IN 24 HOURS WITH A COLD FRONT EXTENDING SW TO S TEXAS WITH
SHOWERS.

CARIBBEAN SEA...
FRESH TO STRONG TRADEWINDS ARE OVER THE CARIBBEAN SEA AND
CENTRAL AMERICA. BROKEN LOW CLOUDS WITH ISOLATED SHOWERS ARE
OVER THE W CARIBBEAN AND CENTRAL AMERICA W OF 83W. FURTHER E...
A BAND OF SHOWERS IS OVER THE LEEWARD ISLAND...PUERTO RICO...AND
HISPANIOLA N OF 16N E OF 73W. IN THE UPPER LEVELS...AN UPPER
LEVEL HIGH IS CENTERED OVER N VENEZUELA NEAR 10N65W. STRONG
SUBSIDENCE IS OVER THE ENTIRE CARIBBEAN AND CENTRAL AMERICA
SUPPRESSING DEEP CONVECTION. EXPECT LITTLE CHANGE OVER THE NEXT
24 HOURS.

ATLANTIC OCEAN...
A 1034 MB HIGH IS CENTERED OVER NORTH CAROLINA NEAR 36N76W
MOVING E. RIDGING IS PRODUCING NE-E FLOW OVER THE W ATLANTIC.
THE TAIL END OF A COLD FRONT ENTERS THE CENTRAL ATLANTIC NEAR
32N46W AND EXTENDS S TO NE OF THE LEEWARD ISLANDS ALONG 25N51W
20N60W. BROKEN COLD AIR STRATOCUMULUS CLOUDS ARE W OF THE FRONT
TO 80W N OF 23N. SCATTERED SHOWERS ARE WITHIN 120 NM E OF THE
FRONT. A TIGHT SURFACE PRESSURE GRADIENT IS OVER THE CENTRAL
ATLANTIC PRODUCING NEAR GALE FORCE WINDS N OF 25N W OF FRONT TO
65W. A 1024 MB HIGH IS OVER THE E ATLANTIC NEAR 27N31W. IN THE
UPPER LEVELS...A RIDGE IS OVER THE W ATLANTIC W OF 50W. AN UPPER
LEVEL TROUGH IS FURTHER E OVER THE CENTRAL AND EASTERN ATLANTIC
BETWEEN 15W-50W. EXPECT OVER THE NEXT 24 HOURS...FOR THE FRONT
MOVE E TO THE E ATLANTIC NEAR 35W WITH CONVECTION.

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

$$
FORMOSA




This weather bulletin was brought to you by:
www.nashvilleweather.net