000 AXNT20 KNHC 270545 TWDAT TROPICAL WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 205 AM EDT TUE APR 27 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 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 0415 UTC... ...THE ITCZ... FROM THE LIBERIA COAST NEAR 6N10W TO 5N20W 2N30W...CROSSING THE EQUATOR ALONG 39W...JUST TO THE SOUTH OF THE EQUATOR BETWEEN 39W AND 49W...INTO THE NORTHEASTERN COAST OF BRAZIL NEAR 1N52W. STRONG SHOWERS AND THUNDERSTORMS ARE ALONG THE COAST OF LIBERIA FROM 5N TO 6N BETWEEN AFRICA AND 12W...IN THE COASTAL WATERS OF FRENCH GUIANA AND SURINAME...AND IN THE COASTAL WATERS FROM GUYANA TO VENEZUELA TO THE SOUTH OF TRINIDAD. ISOLATED MODERATE SHOWERS ARE ELSEWHERE TO THE SOUTH OF 7N. ...DISCUSSION... THE GULF OF MEXICO... BROAD UPPER LEVEL CYCLONIC FLOW COVERS THE AREA. THE CYCLONIC FLOW IS COMPARATIVELY BROAD AND GENTLE...AND NOT RELATED TO A SHARP UPPER LEVEL TROUGH. THE COLD FRONT THAT IS ALONG THE FLORIDA COAST IS SUPPORTED BY THE UPPER LEVEL TROUGH. THE FRONT PASSES THROUGH 32N79W IN THE WESTERN ATLANTIC OCEAN TO FLORIDA COAST THAT IS TO THE EAST OF LAKE OKEECHOBEE...TO MIAMI... THROUGH THE STRAITS OF FLORIDA...TO WESTERN CUBA AND THE NORTHEASTERN COAST OF THE YUCATAN PENINSULA. A SQUALL LINE/ SURFACE TROUGH IS WITHIN 90 NM TO THE EAST OF THE FRONT BETWEEN 79W AND THE YUCATAN PENINSULA. SHOWERS AND POSSIBLE THUNDERSTORMS ARE IN CENTRAL CUBA. BROKEN TO OVERCAST MULTILAYERED CLOUDS ARE WITHIN 180 NM ON EITHER SIDE OF 22N77W NEAR CUBA...28N71W...BEYOND 32N65W JUST TO THE WEST OF BERMUDA. A SURFACE TROUGH GOES FROM NORTH CENTRAL FLORIDA TO THE FLORIDA BIG BEND...TO SOUTHEASTERN LOUISIANA. SURFACE ANTICYCLONIC FLOW COVERS THE GULF OF MEXICO TO THE WEST OF 91W...AROUND A 1010 MB HIGH PRESSURE CENTER THAT IS NEAR 24N93W. THE CARIBBEAN SEA... AN EAST-TO-WEST TROUGH GOES FROM EASTERN HONDURAS INTO WEST CENTRAL GUATEMALA. STRONG SHOWERS AND THUNDERSTORMS ARE WITHIN A 30 NM RADIUS OF 14.5N88W COVERING THE WESTERN HALF OF HONDURAS. BROAD UPPER LEVEL ANTICYCLONIC FLOW COVERS THE AREA. SCATTERED TO BROKEN HIGH CLOUDS COVER MOST OF THE WESTERN TWO-THIRDS OF THE AREA. THE SURFACE PRESSURE GRADIENT IS COMPARATIVELY WEAK. THE 1008 MB ISOBAR COVERS THE AREA TO THE WEST OF 81W...WHILE THE 1012 MB ISOBAR MOVES FROM THE EASTERN DOMINICAN REPUBLIC BEYOND THE SOUTHEASTERN CARIBBEAN SEA ISLANDS. THE PRESSURE PATTERN IS FLAT FROM CUBA TOWARD THE NORTHEASTERN COAST OF COLOMBIA AND NORTHWESTERN COASTAL VENEZUELA. THE ATLANTIC OCEAN... AN UPPER LEVEL TROUGH PASSES THROUGH 33N37W TO 26N43W TO 14N47W TO 12N58W. THE TROUGH SUPPORTS A STATIONARY FRONT THAT PASSES THROUGH 32N27W TO 27N30W TO 20N40W AND 19N44W. NO PRECIPITATION IS READILY APPARENT JUST FROM SATELLITE IMAGERY. SURFACE ANTICYCLONIC FLOW MOVES AROUND AN EASTERN ATLANTIC OCEAN RIDGE THAT PASSES THROUGH 32N21W TO 25N27W TO 17N39W. SURFACE ANTICYCLONIC FLOW COVERS THE ATLANTIC OCEAN TO THE NORTHWEST AND WEST OF THE STATIONARY FRONT...TO THE EAST OF 70W...AROUND A 1023 MB HIGH PRESSURE CENTER THAT IS NEAR 29N45W. FOR ADDITIONAL INFORMATION PLEASE VISIT HTTP://WWW.HURRICANES.GOV/MARINE $$ MT