000
AXNT20 KNHC 132235
TWDAT 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL  
705 PM EST SAT MAR 13 2010

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 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY
THROUGH 2215 UTC.

...THE ITCZ...

FROM THE COAST OF SIERRA LEONE NEAR 8N13W TO 5N20W 3N30W
3N40W 2N44W...CROSSING THE EQUATOR ALONG 50W...INTO COASTAL
NORTHEASTERN BRAZIL. ISOLATED MODERATE SHOWERS TO LOCALLY STRONG 
THUNDERSTORMS ARE FROM 3N TO 4N BETWEEN 18W AND 20W...FROM 2N TO
3N BETWEEN 27W AND 33W...AND FROM THE EQUATOR TO 2N BETWEEN 36W
AND 39W. UPPER LEVEL SOUTHWESTERLY AND SOUTHERLY WINDS ARE 
PUSHING MOISTURE ACROSS THE ATLANTIC OCEAN...TO THE SOUTH
OF 17N BETWEEN THE CAPE VERDE ISLANDS AND 60W.

...DISCUSSION...

THE GULF OF MEXICO...THE ATLANTIC OCEAN TO THE NORTH OF 20N
TO THE WEST OF 60W...AND THE CARIBBEAN SEA TO THE WEST OF THE
WINDWARD PASSAGE...
AN UPPER LEVEL RIDGE COVERS MEXICO. ANTICYCLONIC FLOW REACHES
THE GULF OF MEXICO NEAR 92W. BROAD MIDDLE LEVEL TO UPPER LEVEL 
CYCLONIC FLOW COVERS THE AREA TO THE NORTH OF 20N BETWEEN 65W 
AND 92W. THE CYCLONIC FLOW IS AROUND THE DEEP LAYER TROUGH THAT
IS PROPELLING THE CURRENT COLD FRONT THAT JUST CROSSED THE GULF 
OF MEXICO. THE FRONT NOW PASSES THROUGH 31N73W TO THE BAHAMAS 
NEAR 25N76W TO CUBA NEAR 22N78W...INTO THE CARIBBEAN SEA NEAR 
18N81W. THE COLD FRONT IS DISSIPATING FROM 18N81W TO 12N82W.
A THIN ROPE-CLOUD MARKS THE COLD FRONT IN THE CARIBBEAN SEA.
ISOLATED MODERATE SHOWERS ARE WITHIN 15 NM TO 30 NM ON EITHER
SIDE OF 19N79W 21N76W 24N73W 26N70W...AND TO THE NORTH OF 25N
BETWEEN 60W AND 70W. SURFACE ANTICYCLONIC WIND FLOW COVERS THE 
AREA FROM 18N TO 26N BETWEEN 86W AND 99W...MOVING AROUND
A 1016 MB HIGH PRESSURE CENTER THAT IS NEAR 23N93W.

THE REST OF THE CARIBBEAN SEA...
LOW CLOUDS ARE MOVING NORTHWESTWARD UNDER BROAD SURFACE
SOUTHEASTERLY WIND FLOW...TO THE NORTHEAST OF 20N60W 17N75W.
SHOWERS AND THUNDERSTORMS IN INDIVIDUAL CELLS HAVE DEVELOPED
FROM 10N TO THE COASTAL SECTIONS OF VENEZUELA AND COLOMBIA
BETWEEN 71W AND 75W...IN BROAD SURFACE LOW PRESSURE WITH
MIDDLE LEVEL TO UPPER LEVEL ANTICYCLONIC OUTFLOW THAT IS
ON TOP OF THE AREA.
 
THE REST OF THE ATLANTIC OCEAN...
A MIDDLE LEVEL TO UPPER LEVEL TROUGH PASSES THROUGH 33N38W TO 
29N32W 23N37W TO 15N39W. UPPER LEVEL NORTHWESTERLY WIND FLOW 
CONTINUES ACROSS THE ATLANTIC OCEAN TO THE NORTHWEST OF THE LINE 
10N59W 17N32W. THE UPPER LEVEL FLOW TO THE SOUTH OF 10N59W 
17N32W IS FROM THE SOUTHWEST. THIS SOUTHWESTERLY WIND FLOW
EVENTUALLY FEEDS INTO THE CYCLONIC FLOW THAT MOVES AROUND THE 
33N38W 15N39W TROUGH. A STATIONARY FRONT PASSES THROUGH 32N29W
TO 25N34W TO 19N41W. BROKEN TO OVERCAST MIDDLE LEVEL TO UPPER 
LEVEL CLOUDS ARE WITHIN 120 NM TO 180 NM ON EITHER SIDE OF
16N38W 22N33W 28N29W BEYOND 32N27W. UPPER LEVEL SOUTHWESTERLY 
AND SOUTHERLY WINDS ARE PUSHING MOISTURE ACROSS THE ATLANTIC 
OCEAN...TO THE SOUTH OF 17N BETWEEN THE CAPE VERDE ISLANDS
AND 60W.

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

$$
MT