Tropics I WCTV Eyewitness News: Tallahassee, Thomasville, Valdosta

Monday Morning Tropical Weather Discussion


000
AXNT20 KNHC 231024
TWDAT

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
805 AM EDT MON JUN 23 2008

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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
0945 UTC.

...TROPICAL WAVES...
TROPICAL WAVE IS ALONG 56W/57W S OF 18N MOVING W NEAR 20 KT.
BROAD LOW/MID LEVEL INVERTED-V CURVATURE IS NOTED ON SATELLITE
IMAGERY WITH NO ASSOCIATED DEEP CONVECTION. ISOLATED SHOWERS
COVER A BROAD AREA FROM 14N-19N BETWEEN 55W-63W INCLUDING THE
LESSER ANTILLES.

TROPICAL WAVE IS IN THE W CARIBBEAN ALONG 88W S OF 19N MOVING W
20-25 KT. SATELLITE IMAGERY SHOWS WEAK LOW/MID LEVEL INVERTED-V
CURVATURE MOVING THROUGH THE GULF OF HONDURAS AND INLAND OVER
CENTRAL AMERICA. SCATTERED SHOWERS/ISOLATED THUNDERSTORMS S OF
19N W OF 86W TO INLAND OVER THE YUCATAN PENINSULA.

...ITCZ...

ITCZ AXIS IS CENTERED ALONG 11N13W 5N32W 8N55W. CLUSTERS OF
SCATTERED MODERATE/STRONG CONVECTION ARE WITHIN 120 NM ALONG THE
COAST OF SW AFRICA S OF 11N W OF 10W. CLUSTERS OF SCATTERED
MODERATE/ISOLATED STRONG CONVECTION ARE WITHIN 180 NM N OF THE
ITCZ FROM 18-26W...WITHIN 90/120 NM S OF THE ITCZ FROM
20W-23W...WITHIN 200 NM EITHER SIDE OF THE ITCZ FROM 32W-42W AND
FROM 7N-12N BETWEEN 51W-61W.

...DISCUSSION...

GULF OF MEXICO...
UPPER TROUGH EXTENDS FROM OVER THE US INTO THE W/CENTRAL GULF
ACROSS CENTRAL LOUISIANA TO S MEXICO AND THE BAY OF CAMPECHE
ANCHORED BY AN UPPER LOW OVER THE GREAT LAKES AREA. AN UPPER
LEVEL RIDGE EXTENDS FROM THE CARIBBEAN OVER THE REMAINDER OF THE
GULF INTO THE W ATLC ACROSS THE N BAHAMA ISLANDS. THIS IS
SUPPLYING MUCH OF THE GULF WITH W TO SW UPPER FLOW AND ABUNDANCE
OF TROPICAL MOISTURE. SCATTERED SHOWERS/THUNDERSTORMS ARE WITHIN
45/60 NM OF LINE FROM 28N88W TO THE FLORIDA PANHANDLE NEAR
TALLAHASSEE AND IN THE BAY OF CAMPECHE S OF 20N. SMALL CLUSTERS
OF SCATTERED SHOWERS/ISOLATED THUNDERSTORMS DOT THE REMAINDER OF
THE GULF WHILE THE TEXAS COAST REMAINS CLEAR THIS MORNING. WEAK
SURFACE RIDGE EXTENDS FROM THE W ATLC OVER THE GULF CREATING A
WEAK PRESSURE PATTERN AND PROVIDING LIGHT WINDS ACROSS THE
REGION.

CARIBBEAN...
AN UPPER RIDGE ANCHORED IN THE E PACIFIC REGION EXTENDS ACROSS
CENTRAL AMERICA AND W/CENTRAL CUBA INTO THE W ATLC COVERING THE
AREA N OF 11N W OF 80W WHILE A SECOND UPPER RIDGE ANCHORED IN
THE TROPICAL ATLC COVERS THE E CARIBBEAN. AN UPPER TROUGH IS
BETWEEN THESE UPPER RIDGES EXTENDING FROM ACROSS THE CENTRAL
ATLC OVER HISPANIOLA SW TO E PANAMA. UPPER LEVEL DIFFLUENCE IS
GENERATING SCATTERED SHOWERS/THUNDERSTORMS WITHIN 90 NM ALONG
THE SE COAST OF CUBA FROM 74W-78W. THE ITCZ CROSSES THE S
CARIBBEAN FROM COLOMBIA N OF PANAMA INTO THE E PACIFIC OVER
COSTA RICA GENERATING SCATTERED SHOWERS/ISOLATED THUNDERSTORMS
OVER THE AREA S OF 13N W OF 74W TO INLAND OVER W COLOMBIA AND
CENTRAL AMERICA. MODERATE/STRONG EASTERLY TRADE WINDS DOMINATE
MOST OF THE CARIBBEAN DUE TO THE TIGHT PRESSURE GRADIENT BETWEEN
THE SURFACE RIDGE OVER THE ATLC AND LOWER PRESSURE OVER SOUTH
AMERICA AND ARE USHERING IN ISOLATED SHOWERS OVER THE E
CARIBBEAN E OF 70W.

ATLANTIC...
NARROW UPPER RIDGE EXTENDS FROM THE CARIBBEAN ACROSS W/CENTRAL
CUBA AND THE N BAHAMA ISLANDS TO NEAR 30N75W PROVIDING UPPER
DIFFLUENCE AND GENERATING CLUSTERS OF SCATTERED SHOWERS/
THUNDERSTORMS OVER A THE AREA W OF A LINE FROM CENTRAL CUBA
NEAR 22N79W TO BEYOND 32N72W AND ISOLATED CLUSTERS OF SIMILAR
ACTIVITY FROM 22N-29N BETWEEN 66W-73W. THE MOST PROMINENT UPPER
LEVEL FEATURE IS THE UPPER TROUGH THAT REMAINS ACROSS THE BASIN
EXTENDING THROUGH 32N14W ACROSS THE CANARY ISLANDS THE W ALONG
26N32W 23N44W 22N60W THEN SW INTO THE CARIBBEAN OVER HISPANIOLA.
A SURFACE RIDGE DOMINATES THE ENTIRE ATLC BASIN FROM AFRICA INTO
THE GULF OF MEXICO ANCHORED BY A 1029 MB HIGH CENTERED NEAR
32N48W. MODERATE SUBSIDENCE AND A FAIR AMOUNT OF DRY STABLE AIR
ALSO DOMINATES THE ATLC E OF 60W GIVING THE AREA FAIR WEATHER
AGAIN THIS MORNING. BROAD E/W UPPER RIDGE DOMINATES THE TROPICAL
ATLC FROM THE CAPE VERDE ISLANDS TO OVER THE E CARIBBEAN
ENHANCING THE CONVECTION ASSOCIATED WITH THE ITCZ.

$$
WALLACE


WCTV 1801 Halstead Blvd. Tallahassee, FL 32309
Gray Television, Inc. - Copyright © 2002-2014 - Designed by Gray Digital Media - Powered by Clickability 20656894 - wctv.tv/a?a=20656894