000
AXNT20 KNHC 111726
TWDAT 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL  
105 PM EST THU FEB 11 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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1645 UTC.

...THE ITCZ...

THE ITCZ AXIS IS CENTERED ALONG 7N8W 4N13W 5N21W 3N33W CROSSING 
THE EQUATOR NEAR 40W. CLUSTERS OF SCATTERED MODERATE/ISOLATED 
STRONG CONVECTION ARE FROM 2N-6N BETWEEN 7W-24W INCLUDING THE SW 
COAST OF AFRICA. 

...DISCUSSION...
GULF OF MEXICO...
A FRONTAL BOUNDARY IS DEVELOPING INLAND OVER E MEXICO AND SW 
TEXAS COAST. OTHERWISE...SURFACE HIGH PRESSURE CONTINUES TO 
BUILD SE ACROSS THE GULF ANCHORED BY A PAIR OF 1024 MB HIGHS 
OVER E MISSISSIPPI AND CENTRAL ARKANSAS. A DEEP UPPER TROUGH 
MOVING OUT OF THE DESERT SW/NW MEXICO CONTINUES TO GENERATE A 
STRONG UPPER JET ACROSS THE SE US AND FORCING UPPER LEVEL 
MOISTURE ACROSS MEXICO INTO THE GULF GIVING MOST OF THE GULF 
BROKEN/OVERCAST MULTILAYERED CLOUDS WITH RAIN N OF 27N W OF 92W 
AND SCATTERED SHOWERS W OF 86W. THE N PORTION OF TEXAS IS 
GETTING LIGHT TO MODERATE SNOW. 

CARIBBEAN SEA...
COLD FRONT ENTERS THE CARIBBEAN FROM THE W/CENTRAL ATLC ACROSS N 
HAITI OVER CENTRAL JAMAICA TO INLAND OVER E HONDURAS NEAR 16N85W 
GENERATING BROKEN LOW/MID CLOUDS WITH POSSIBLE ISOLATED SHOWERS 
MAINLY IN THE GULF OF HONDURAS N OF THE FRONT TO 20N W OF 80W. 
THE FRONTAL BOUNDARY OVER THE CARIBBEAN IS BECOMING NEAR 
STATIONARY AT 11/1500 UTC. THE REMAINDER OF THE CARIBBEAN IS 
UNDER THE INFLUENCE OF DRY STABLE AIR GIVING THE REMAINDER OF 
THE AREA MOSTLY CLEAR SKIES BUT THE CONTINUING TIGHT PRESSURE 
GRADIENT OVER THE S CARIBBEAN...MODERATE EASTERLY TRADE WINDS 
ARE OVER THE AREA GENERALLY S OF 15N. 

ATLANTIC OCEAN.
COLD FRONT ENTERS THE W ATLC NEAR 32N55W EXTENDING SW ALONG 
24N63W ACROSS N HAITI INTO THE CARIBBEAN. THE UPPER SUPPORT OF 
THIS FRONT IS OVER THE NW ATLC N OF THE REGION BUT CONTINUES TO 
GENERATE BROKEN/OVERCAST LOW/MID CLOUDS WITH POSSIBLE ISOLATED 
SHOWERS WITHIN 120 NM E OF THE FRONT N OF 22N. COLD AIR 
STRATOCUMULUS CLOUDS ARE W OF THE FRONT OVER THE REMAINDER OF 
THE W ATLC TO WITHIN 45/75 NM OF THE US COASTLINE. A SECOND 
WEAKENING COLD FRONT ENTERS THE E ATLC NEAR 32N27W EXTENDING TO 
27N34W WITH THE UPPER SUPPORT N OF THE REGION AND GENERATING 
BROKEN LOW/MID CLOUDS WITH POSSIBLE ISOLATED SHOWERS WITHIN 30 
NM EITHER SIDE OF THE FRONT. WEAK SURFACE HIGH PRESSURE 
DOMINATES THE REMAINDER OF THE ATLC WITH A 1015 MB HIGH CENTERED 
IN THE E/CENTRAL ATLC NEAR 30N37W AND A 1018 MB HIGH JUST W OF 
THE CANARY ISLANDS NEAR 29N21W. 

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

$$
WALLACE