[Tropical] Tropical Weather Discussion

[EMWIN Server]

AXNT20 KNHC 251737
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
105 PM EST SUN JAN 25 2015

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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
1715 UTC.

...SPECIAL FEATURES...

...GALE-FORCE WINDS FOR THE ATLANTIC OCEAN...

A COLD FRONT IS FORECAST TO BE OFF THE FLORIDA ATLANTIC COAST ON
MON EVENING FROM 31N76W TO 28N77W TO 26N80W. GALE FORCE WINDS
ARE FORECAST N OF 28N WITHIN 180 NM E OF FRONT...AND N OF 28N W
OF FRONT TO 80W. PLEASE READ THE HIGH SEAS FORECAST...
MIAHSFAT2/FZNT02 KNHC...AND THE OFFSHORE FORECAST...
MIAOFFNT3/FZNT23 KNHC...FOR MORE DETAILS.

...ITCZ/MONSOON TROUGH...

THE MONSOON TROUGH EXTENDS ACROSS AFRICA INTO THE E TROPICAL
ATLC NEAR 8N12W TO 3N21W WHERE THE ITCZ BEGINS AND CONTINUES TO
2N30W TO THE COAST OF SOUTH AMERICA NEAR 2N45W. ISOLATED
MODERATE CONVECTION IS FROM 1N-4N BETWEEN 21W-36W. SCATTERED
MODERATE CONVECTION IS FROM 1N-5N BETWEEN 45W-49W.

...DISCUSSION...

GULF OF MEXICO...

A 1021 MB HIGH IS CENTERED OVER THE WESTERN GULF OF MEXICO NEAR
24N92W. 10-15 KT ANTICYCLONIC WINDS ARE NOTED OVER THE GULF
GOING AROUND THE HIGH. SCATTERED LOW CLOUDS ARE OVER THE CENTRAL
GULF...WHILE BROKEN TO OVERCAST LOW CLOUDS ARE OVER THE BAY OF
CAMPECHE. THE GULF IS VOID OF PRECIPITATION. IN THE UPPER
LEVELS...ZONAL FLOW IS OVER THE GULF WITH UPPER LEVEL MOISTURE.
EXPECT IN 24 HOURS FOR A COLD FRONT TO EXTEND FROM CENTRAL
FLORIDA TO S OF BROWNSVILLE TEXAS WITH SCATTERED SHOWERS OVER
CENTRAL FLORIDA. 20-30 KT NORTHERLY WINDS WILL BE N OF FRONT.
ALSO EXPECT IN 24 HOURS FOR UPPER LEVEL WINDS TO BE FROM THE NW
OVER THE NORTHERN GULF ENHANCING COLD AIR ADVECTION.

CARIBBEAN SEA...

THE TAIL END OF A COLD FRONT EXTENDS FROM CENTRAL CUBA AT 22N78W
TO 20N82W. A STATIONARY FRONT CONTINUES TO THE GULF OF HONDURAS
NEAR 16N87W. A PREFRONTAL TROUGH EXTENDS FROM S OF THE CAYMAN
ISLANDS AT 19N82W TO CENTRAL HONDURAS AT 15N86W. SCATTERED
SHOWERS ARE WITHIN 60 NM OF THE FRONTS. 20 KT NORTHERLY WINDS
ARE OVER THE NW CARIBBEAN N OF FRONT. 10-20 KT TRADEWINDS ARE
OVER THE REMAINDER OF THE CARIBBEAN. SMALL AREAS OF SCATTERED
SHOWERS ARE NEAR THE VIRGIN ISLANDS...OVER HISPANIOLA...AND S OF
HISPANIOLA FROM 14N-16N BETWEEN 68W-71W. IN THE UPPER LEVELS A
RIDGE IS OVER THE CARIBBEAN SEA WITH AXIS ALONG 73W. STRONG
SUBSIDENCE IS OVER THE CARIBBEAN AND CENTRAL AMERICA. EXPECT THE
STATIONARY FRONT TO PERSIST OVER THE NW CARIBBEAN FOR THE NEXT
24 HOURS WITH SHOWERS.

...HISPANIOLA...

A SHALLOW MOIST AIRMASS IS MOVING ACROSS HISPANIOLA WITH
SCATTERED SHOWERS. THIS AIRMASS WILL CONTINUE TO MOVE ACROSS THE
ISLAND TODAY THROUGH MONDAY. MIDDLE TO UPPER LEVEL RIDGING ALONG
WITH DRY AIR WILL HINDER THE DEVELOPMENT OF DEEP CONVECTION.

ATLANTIC OCEAN...

A COLD FRONT EXTENDS OVER THE W ATLANTIC FROM 32N63W TO THE
CENTRAL BAHAMAS TO CENTRAL CUBA AT 22N78W. SCATTERED SHOWERS ARE
WITHIN 90 NM W OF FRONT. A GALE RECENTLY ENDED E OF FRONT N OF
29N. THE TAIL END OF A COLD FRONT IS OVER THE CENTRAL ATLANTIC
FROM 32N38W TO 27N40W TO 24N46W. A PREFRONTAL TROUGH EXTENDS
FROM 25N41W TO 22N46W. SCATTERED MODERATE CONVECTION IS E OF
FRONT FROM 24N-28N BETWEEN 38W-41W. A 1037 MB HIGH IS CENTERED
OVER THE E ATLANTIC NEAR 42N17W. SURFACE RIDGING IS N OF 25N E
OF 35W. OF NOTE IN THE UPPER LEVELS...AN UPPER LEVEL LOW IS
CENTERED OVER THE CENTRAL ATLANTIC NEAR 24N39W ENHANCING
CONVECTION. EXPECT IN 30 HOURS FOR ANOTHER COLD FRONT TO BE OVER
THE W ATLANTIC WITH GALE FORCE WINDS. SEE ABOVE. ALSO EXPECT THE
EASTWARD PROGRESSION OF THE OTHER TWO COLD FRONTS.

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

$$
FORMOSA

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