Tropical Weather Discussion
Issued by NWS

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000
AXNT20 KNHC 252357
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
805 PM EDT SAT APR 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 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
2315 UTC.

...ITCZ/MONSOON TROUGH...
THE MONSOON TROUGH EXTENDS FROM THE AFRICAN COAST NEAR 9N13W TO
4N22W. THE INTERTROPICAL CONVERGENCE ZONE AXIS EXTENDS FROM
4N22W TO 2N30W TO THE COAST OF SOUTH AMERICA NEAR 0N37W. WIDELY
SCATTERED MODERATE CONVECTION IS FROM 4N-7N BETWEEN 14W-19W.

...DISCUSSION...

GULF OF MEXICO...

A 1005 MB LOW IS CENTERED NEAR BROWNSVILLE TEXAS AT 26N97W. A
SURFACE TROUGH EXTENDS S FROM THE LOW TO W OF TAMPICO MEXICO
NEAR 22N98W. AN OUTFLOW BOUNDARY IS OVER THE NW GULF OF MEXICO
FROM S LOUISIANA AT 30N90W TO 27N95W. PRESENTLY SCATTERED
MODERATE CONVECTION IS OVER THE NORTHERN GULF N OF 28N BETWEEN
86W-91W MOVING E. THE REMAINDER OF THE GULF HAS 10-15 KT
SOUTHERLY WINDS AND MOSTLY FAIR WEATHER. SMOKE AND HAZE IS SEEN
HOWEVER OVER THE YUCATAN PENINSULA AND THE SOUTHERN GULF S OF
24N BETWEEN 86W-94W. IN THE UPPER LEVELS...A SHORTWAVE LOW IS
CENTERED OVER S LOUISIANA MOVING E ENHANCING THE GULF
CONVECTION. EXPECT OVER THE NEXT 24 HOURS FOR CONVECTION TO
PERSIST OVER N FLORIDA AND THE NE GULF.

CARIBBEAN SEA...

A 1005 MB LOW IS CENTERED OVER N COLOMBIA NEAR 7N74W. 10-25 KT
TRADEWINDS ARE OVER THE CARIBBEAN SEA WITH STRONGEST WINDS ALONG
THE COAST OF N COLOMBIA AND WEAKEST WINDS S OF CUBA. CLUSTERS OF
SCATTERED MODERATE TO ISOLATED STRONG CONVECTION IS INLAND OVER
NW VENEZUELA...N COLOMBIA...PANAMA...AND COSTA RICA. SCATTERED
SHOWERS ARE OVER PUERTO RICO...HISPANIOLA...AND JAMAICA. THE
REMAINDER OF THE CARIBBEAN HAS MOSTLY FAIR WEATHER. IN THE
UPPER LEVELS...AN UPPER LEVEL HIGH IS CENTERED OVER JAMAICA.
STRONG SUBSIDENCE COVERS THE ENTIRE CARIBBEAN SEA. EXPECT LITTLE
CHANGE OVER THE NEXT 24 HOURS.

...HISPANIOLA...

CURRENTLY SCATTERED SHOWERS ARE OVER HISPANIOLA DUE TO AFTERNOON
AND EVENING HEATING. STRONG SUBSIDENCE AND DRY AIR REMAINS ALOFT
SUPPRESSING CONVECTION. EXPECT SIMILAR WEATHER OVER THE NEXT 24
HOURS.

ATLANTIC OCEAN...

A 1017 MB HIGH IS CENTERED OVER THE W ATLANTIC NEAR 31N72W. A
COLD FRONT IS OVER THE W ATLANTIC FROM 31N56W TO 27N60W TO
25N70W. A 1007 MB LOW IS CENTERED OVER THE CENTRAL ATLANTIC NEAR
34N45W. A DISSIPATING COLD FRONT EXTENDS S TO 27N50W. WIDELY
SCATTERED MODERATE CONVECTION IS FROM 23N-30N BETWEEN 43W-59W.
ANOTHER 1018 MB LOW IS CENTERED W OF THE CANARY ISLANDS NEAR
30N26W MOVING E. A 1021 MB HIGH IS ALSO CENTERED OVER THE E
ATLANTIC NEAR 24N30W. OF NOTE IN THE UPPER LEVELS...AN UPPER
LEVEL RIDGE IS OVER THE W ATLANTIC BETWEEN 60W-80W. AN UPPER
LEVEL TROUGH IS OVER THE CENTRAL ATLANTIC BETWEEN 40W-60W. AN
UPPER LEVEL RIDGE IS OVER THE E ATLANTIC E OF 40W. EXPECT ALL
FRONTS AND LOWS TO MOVE E OVER THE NEXT 24 HOURS.

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

$$
FORMOSA


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