[Tropical] Tropical Weather Discussion

[EMWIN Server]

AXNT20 KNHC 091804
TWDAT

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
805 AM EDT SAT MAY 09 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
1515 UTC.

...SPECIAL FEATURE...

TROPICAL STORM ANA...
TROPICAL STORM ANA IS CENTERED NEAR 32.7N 78.1W AT 09/1800 UTC
OR ABOUT 74 NM SE OF MYRTLE BEACH SOUTH CAROLINA MOVING NW AT 3
KT. ESTIMATED MINIMUM SURFACE PRESSURE IS 1001 MB. MAXIMUM WIND
SPEED IS 50 KT WITH GUSTS TO 60 KT. SCATTERED MODERATE
CONVECTION IS FROM 31N-33N BETWEEN 76W-79W. PLEASE SEE LATEST
NHC INTERMEDIATE PUBLIC ADVISORY UNDER WMO/AWIPS HEADERS
MIATCMPAT1/WTNT31 KNHC AND THE FULL FORECAST/ADVISORY UNDER
AWIPS/WMO HEADERS MIATCMAT1/WTNT21 KNHC FOR MORE DETAILS.

GALE WARNING FOR SW CARIBBEAN...
A GALE WARNING WILL GO INTO EFFECT FOR THE SW CARIBBEAN ALONG
THE COAST OF COLOMBIA FROM 10N-14N BETWEEN 72W-76.5W STARTING
SUN NIGHT AND WILL CONTINUE TO MON MORNING. PLEASE SEE THE HIGH
SEAS FORECAST UNDER WMO/AWIPS HEADERS MIAHSFAT2/FZNT02 KNHC FOR
MORE DETAILS.

...ITCZ/MONSOON TROUGH...

THE MONSOON TROUGH EXTENDS ACROSS AFRICA INTO THE TROPICAL ATLC
NEAR 18N16W TO 10N20W TO 5N24W WHERE THE ITCZ BEGINS AND
CONTINUES TO 2N40W TO THE COAST OF SOUTH AMERICA NEAR 1S47W.
SCATTERED MODERATE CONVECTION IS FROM 2N-5N BETWEEN 25W-43W.

...DISCUSSION...

GULF OF MEXICO...

AS OF 1500 UTC...A 1020 MB HIGH IS CENTERED OVER THE NE GULF OF
MEXICO NEAR 30N86W. 10-20 SE WINDS DOMINATE THE GULF WITH
STRONGEST WINDS ALONG THE TEXAS COAST. MOSTLY FAIR WEATHER IS
OVER THE GULF. IN THE UPPER LEVELS...A RIDGE IS OVER THE GULF
WITH AXIS ALONG 92W. UPPER LEVEL MOISTURE IS OVER THE W GULF W
OF 90W ...WHILE STRONG SUBSIDENCE IS OVER THE E GULF. EXPECT
OVER THE NEXT 24 HOURS FOR SCATTERED SHOWERS TO BUILD OVER S
FLORIDA...AND THE TEXAS COAST...DURING THE AFTERNOON AND EVENING
HOURS.

CARIBBEAN SEA...

15-30 KT TRADEWINDS ARE OVER THE CARIBBEAN SEA WITH THE
STRONGEST WINDS OVER THE CENTRAL CARIBBEAN S OF 18N BETWEEN 68W-
78W. LIGHTNING DETECTION IMAGERY SHOWS ISOLATED MODERATE
CONVECTION INLAND OVER N COLOMBIA...PANAMA...AND COSTA RICA.
SCATTERED SHOWERS ARE ALSO INLAND OVER N NICARAGUA AND CENTRAL
HONDURAS. IN THE UPPER LEVELS...AN UPPER LEVEL TROUGH IS OVER
THE CARIBBEAN WITH AXIS ALONG 80W. STRONG SUBSIDENCE COVERS THE
AREA EXCEPT OVER PUERTO RICO...AND N COLOMBIA. EXPECT OVER THE
NEXT 24 HOURS FOR CONVECTION TO BUILD OVER THE SW CARIBBEAN.

...HISPANIOLA...

CURRENTLY MOSTLY FAIR WEATHER IS NOTED ON SATELLITE IMAGERY
ACROSS THE ISLAND. WATER VAPOR IMAGERY INDICATES RELATIVELY
STABLE AIR ALOFT PROMOTING THE OVERALL FAIR WEATHER. THESE
SYNOPTIC CONDITIONS ARE EXPECTED TO PERSIST FOR THE NEXT 24
HOURS.

ATLANTIC OCEAN...

TROPICAL STORM ANA IS OFF THE SOUTH CAROLINA COAST MOVING SLOWLY
NW. SEE ABOVE. A 1025 MB HIGH IS CENTERED OVER THE W ATLANTIC
NEAR 28N55W. A COLD FRONT IS OVER THE CENTRAL ATLANTIC FROM
32N40W TO 31N50W TO BEYOND 32N60W MOVING ESE. SCATTERED SHOWERS
ARE WITHIN 90 NM OF THE FRONT. EXPECT IN 24 HOURS FOR THE COLD
FRONT TO EXTEND FROM 31N33W TO 25N43W TO 31N63W WITH SHOWERS.

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

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