[Tropical] Tropical Weather Discussion

[EMWIN Server]

AXNT20 KNHC 281909 AAA
TWDAT

TROPICAL WEATHER DISCUSSION...AMENDED
NWS NATIONAL HURRICANE CENTER MIAMI FL
205 PM EDT SUN JUL 28 2013

AMENDED TO INCLUDE SPECIAL FEATURES SECTION

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
1700 UTC.

...SPECIAL FEATURES...
A TROPICAL WAVE...REMNANTS OF DORIAN...IS LOCATED JUST E OF THE
LEEWARD ISLANDS ALONG 59W FROM 17N TO 23N AND IS MOVING W ABOUT
15 KT. SCATTERED MODERATE/STRONG CONVECTION IS LOCATED FROM 18N
TO 22N BETWEEN 58W AND 63W.

...TROPICAL WAVES...
A TROPICAL WAVE IS LOCATED FROM 18N36W TO 10N28W AND IS MOVING W
ABOUT 15 KT. MINIMAL CONVECTION IS ASSOCIATED WITH THIS FEATURE.
BROKEN LOW TO MIDDLE LEVEL CLOUDS ARE LOCATED UP TO 12 TO 15
DEGREES BEHIND THE WAVE AXIS.

...ITCZ/MONSOON TROUGH...
THE MONSOON TROUGH EXTENDS ACROSS AFRICA INTO THE E TROPICAL
ATLANTIC NEAR 14N17W AND CONTINUES ALONG TO 14N28W TO 07N40W
WHERE THE ITCZ BEGINS AND CONTINUES ALONG 06N49W TO SOUTH
AMERICA NEAR 05N58W. CLUSTERS OF SCATTERED MODERATE CONVECTION
ARE LOCATED S OF THE MONSOON TROUGH IN A 60-90 NAUTICAL MILE
WIDE BAND CENTERED FROM 11N24W TO 06N30W TO 06N38W. SCATTERED
MODERATE ISOLATED STRONG CONVECTION IS LOCATED FROM 08N TO 10N
BETWEEN 52W AND 60W.

...DISCUSSION...

GULF OF MEXICO...
ANTICYCLONIC FLOW ALOFT COVERS MOST OF THE WESTERN HALF OF THE
GULF THIS AFTERNOON WITH AN ANTICYCLONE CENTER POSITIONED OVER
NORTHERN MEXICO NEAR 30N106W. A SMALL TIGHTLY WOUND MIDDLE/UPPER
LEVEL CYCLONIC CIRCULATION IS CENTERED OVER SOUTHERN MEXICO NEAR
18N98W...MOVING W 10 TO 15 KT. A MIDDLE/UPPER LEVEL TROUGH IS
LOCATED OVER THE NE GULF WITH THE AXIS LOCATED THROUGH THE
CENTRAL FLORIDA PANHANDLE TO 25N87W. SCATTERED SHOWERS AND
THUNDERSTORMS ARE LOCATED ALONG THE COAST OF THE FLORIDA
PANHANDLE AND CONTINUE OFFSHORE ABOUT 120 NAUTICAL MILES IN
ASSOCIATION WITH A STATIONARY FRONT STRETCHING FROM SE GEORGIA
ACROSS SW LOUISIANA. A 1016 MB HIGH IS LOCATED NEAR 24N89W AND
IS FORECAST TO MOVE NE.

CARIBBEAN SEA...
WINDS ALOFT OVER THE CARIBBEAN ARE MOSTLY LIGHT WITH WATER VAPOR
IMAGERY INDICATING SUBSIDENCE OVER THE NW AND CENTRAL PARTS.
SCATTERED SHOWERS AND THUNDERSTORMS ARE LOCATED ALONG THE
SOUTHERN NICARAGUA COAST...THE ENTIRE COSTA RICA COAST...AND THE
PANAMA COAST W OF 80W. ACTIVITY CONTINUES OFFSHORE ABOUT 90
NAUTICAL MILES. SCATTERED WESTWARD MOVING LOW CLOUDS COVER VAST
STRETCHES OF THE CARIBBEAN.

HISPANIOLA...
EARLY AFTERNOON VISIBLE SATELLITE IMAGERY INDICATES NO
SIGNIFICANT CONVECTION ACROSS HISPANIOLA. BROKEN/OVERCAST
LOW/MIDDLE LEVEL CLOUDS COVER THE INTERIOR OF THE DOMINICAN
REPUBLIC BECOMING SCATTERED/BROKEN OVER THE REMAINDER OF THE
LAND AREAS. SKIES ARE MOSTLY CLEAR ALONG THE ENTIRE COASTLINE
AND OFFSHORE.

ATLANTIC OCEAN...
CYCLONIC FLOW ALOFT COVERS THE WESTERN ATLANTIC BETWEEN 65W AND
76W. MOVING DOWNSTREAM A MIDDLE/UPPER LEVEL TROUGH IS LOCATED N
OF ABOUT 18N BETWEEN 42W AND 55W. A SMALL ANTICYCLONIC
CIRCULATION ALOFT IS POSITIONED IN THE VICINITY OF 31N39W. A
TIGHTLY WOUND MIDDLE/UPPER LEVEL CYCLONIC CIRCULATION IS
CENTERED NEAR 29N31W AND IS NEARLY STATIONARY. FLOW ALOFT OVER
THE EASTERN ATLANTIC N OF 15N E OF 28W IS MOSTLY ANTICYCLONIC. A
LINE OF MODERATE TO STRONG THUNDERSTORMS IS LOCATED FROM
31N77.5W TO THE FLORIDA E COAST AT 26.5N. A WEAK NEARLY
STATIONARY 1018 MB HIGH IS LOCATED NEAR 27N21W.

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

$$
CAB


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