000 AXNT20 KNHC 181439 CCA TWDAT TROPICAL WEATHER DISCUSSION...CORRECTED NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 805 AM EDT WED AUG 18 2010 CORRECTED FOR DATE AND TIME... 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 1015 UTC. ...TROPICAL WAVES... AN ATLANTIC OCEAN TROPICAL WAVE IS ALONG 23N25W 14N27W MOVING WESTWARD 10 TO 15 KT. THIS FEATURE HAS BEEN MOVING NORTHWESTWARD FROM CENTRAL AFRICA DURING THE LAST 4 TO 5 DAYS. MODERATE SHOWERS ARE FROM 12N TO 15N BETWEEN 22W AND 32W. AN ATLANTIC OCEAN TROPICAL WAVE IS ALONG 26N37W 13N40W MOVING WESTWARD 10 KT. NO SIGNIFICANT DEEP CONVECTIVE PRECIPITATION ACCOMPANIES THIS WAVE. A CARIBBEAN SEA TROPICAL WAVE IS ALONG 23N72W...ACROSS HAITI... BEYOND 15N74W TO NORTHERN COLOMBIA ALONG 73W/74W. AN UPPER LEVEL TROUGH EXTENDS FROM JAMAICA TO NORTHERN COLOMBIA. IT IS NOT EASY TO KNOW IF THE ISOLATED MODERATE SHOWERS THAT COVER THE WATERS FROM HAITI SOUTHWARD BETWEEN 70W AND 80W ARE ASSOCIATED JUST WITH THE TROPICAL WAVE AND/OR JUST WITH THE UPPER LEVEL TROUGH. ...THE ITCZ... FROM 13N30W TO 10N44W 8N50W...THROUGH NORTHERN COASTAL SURINAME AND NORTHERN GUYANA BEYOND 6N60W. LARGE-SCALE CYCLONIC FLOW THAT IS NOT ASSOCIATED WITH THE ITCZ COVERS THE ATLANTIC OCEAN TO THE SOUTH OF 25N TO THE EAST OF 30W. STRONG SHOWERS AND THUNDERSTORMS ARE FROM 6N TO 7N BETWEEN 23W AND 25W...FROM 9N TO 10N BETWEEN 37W AND 39W...FROM 5N TO 9N BETWEEN 44W AND 47W...AND FROM 8N TO 10N BETWEEN 55W AND 57W. WIDELY SCATTERED MODERATE SHOWERS ARE ELSEWHERE FROM 4N TO 11N BETWEEN AFRICA AND 60W. ...DISCUSSION... THE GULF OF MEXICO... BROAD UPPER LEVEL ANTICYCLONIC FLOW COVERS THE NORTHWESTERN ONE-THIRD OF THE AREA. BROAD MIDDLE LEVEL CYCLONIC FLOW COVERS THE SOUTHEASTERN TWO-THIRDS OF THE AREA. THE CYCLONIC FLOW IS ON THE NORTHERN SIDE OF THE 17N91W CYCLONIC CENTER THAT JUST ROLLED THROUGH GUATEMALA INTO SOUTHEASTERN MEXICO. ISOLATED MODERATE SHOWERS AND POSSIBLE THUNDERSTORMS ARE TO THE SOUTHEAST OF THE LINE FROM THE FLORIDA BIG BEND TO THE MEXICO GULF COAST NEAR 24N. SCATTERED STRONG SHOWERS AND THUNDERSTORMS ARE INLAND IN MEXICO...TO THE SOUTH OF 24N BETWEEN GUATEMALA AND 105W... IN AN AREA OF UPPER LEVEL DIFFLUENT FLOW. UPPER LEVEL CYCLONIC FLOW COVERS EXTREME NORTHWESTERN MEXICO...WITH A CYCLONIC CENTER THAT IS ALONG THE MEXICO/ARIZONA BORDER. THE CARIBBEAN SEA... BROAD UPPER LEVEL CYCLONIC FLOW COVERS THE AREA FROM THE STRAITS OF FLORIDA TO 20N IN THE CARIBBEAN SEA SIDE OF CUBA. CYCLONIC FLOW COVERS CENTRAL AMERICA FROM EL SALVADOR AND NORTHWESTERN NICARAGUA INTO THE GULF OF MEXICO. THE CYCLONIC CENTER IS NEAR 17N91W...EXITING GUATEMALA INTO SOUTHEASTERN MEXICO. SCATTERED MODERATE TO STRONG SHOWERS AND THUNDERSTORMS ARE WITHIN 60 NM TO 75 NM ON EITHER SIDE OF 19N87W 17N83W 12N79W IN THE WESTERN CARIBBEAN SEA...UNDER UPPER LEVEL ANTICYCLONIC OUTFLOW. AN UPPER LEVEL TROUGH EXTENDS FROM JAMAICA TOWARD THE COAST OF NORTHERN COLOMBIA. STRONG SHOWERS AND THUNDERSTORMS SURROUND JAMAICA FROM NORTH CENTRAL TO SOUTHEAST. ISOLATED MODERATE SHOWERS COVER THE REST OF THE WATERS FROM HAITI SOUTHWARD BETWEEN 69W AND 78W. AN UPPER LEVEL TROUGH PASSES THROUGH 21N54W IN THE ATLANTIC OCEAN...TO 10N61W. CYCLONIC FLOW FROM THIS TROUGH REACHES 14N67W IN THE EASTERN CARIBBEAN SEA. HIGH CLOUDS CUT SOUTHEASTWARD FROM THE MONA PASSAGE TOWARD THE SOUTHEASTERN CARIBBEAN SEA ISLANDS PER THE TROUGH BASE THAT IS NEAR 10N61W. SHOWERS 15N TO 19N BETWEEN 55W AND 56W...AND FROM 14N TO 15N BETWEEN 57W AND 62W. THE ATLANTIC OCEAN... A DEEP LAYER TROUGH CONTINUES THROUGH THE CENTRAL ATLANTIC TOWARD THE NORTHERN BAHAMAS AND SOUTH FLORIDA. A STATIONARY FRONT IS ALONG 31N/32W BETWEEN 50W AND 65W. A SURFACE TROUGH IS ALONG 33N75W 30N77W 29N82W IN FLORIDA. SHOWERS ALONG THE TROUGH HAVE BEEN DISSIPATING WITH TIME. SHOWERS AND THUNDERSTORMS ARE IN THE CENTRAL BAHAMAS...IN AN AREA OF UPPER LEVEL DIFFLUENT FLOW FROM 23N TO 25N BETWEEN 70W AND 77W. ISOLATED MODERATE SHOWERS ARE TO THE NORTHWEST OF 32N48W 26N66W...INTO THE STRAITS OF FLORIDA. AN UPPER LEVEL TROUGH PASSES THROUGH 32N47W TO 21N54W TO 10N61W. THIS TROUGH IS SURROUNDED BY DRY AIR IN SUBSIDENCE. FOR ADDITIONAL INFORMATION PLEASE VISIT HTTP://WWW.HURRICANES.GOV/MARINE $$ MT