000 AGXX40 KNHC 210610 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 200 AM EDT WED JUL 21 2010 MARINE WEATHER DISCUSSION FOR THE GULF OF MEXICO...CARIBBEAN SEA AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W. TROPICAL WAVE OVER THE WESTERN GULF OF MEXICO ALONG 91W/92 WILL MOVE W THROUGH THE SW GULF TODAY AND INLAND OVER MEXICO TONIGHT. SCATTERED SHOWERS AND TSTMS ARE SW OF THE WAVE S OF 23N FROM THE FROM THE WAVE TO THE YUCATAN PENINSULA. ELY WINDS 15-20 KT ARE W OF THE WAVE. RIDGE ALONG 30N WILL MOVE N OF AREA LATER TODAY AND REBUILD ALONG THE GULF COASTAL PLAIN FRI AND SAT. LOW PRES CENTER COULD POSSIBLY BECOME A TROPICAL CYCLONE WILL MOVE INTO THE EASTERN GULF FRI NIGHT AND SAT AND INTO THE N CENTRAL GULF SUN. ATLC HIGH PRES RIDGE ALONG 30N WILL LIFT N OF THE AREA THIS AFTERNOON. NORTHERN PORTION OF A TROPICAL WAVE IS OVER THE SE BAHAMAS AND WILL CONTINUE TO MOVE WWD ACROSS THE WESTERN CARIBBEAN THROUGH THROUGH SAT. SURFACE TROUGH EXTENDS FROM 22N65W TO EASTERN PUERTO RICO PRODUCING SCATTERED TO NUMEROUS SHOWERS AND TSTMS FROM THE NORTHERN LEEWARD ISLANDS WESTWARD TO HISPANIOLA. A LOW IS EXPECTED TO DEVELOP ALONG THE TROUGH AND COULD POSSIBLE DEVELOP INTO A TROPICAL CYCLONE AS IT TRACKS NW ACROSS THE BAHAMAS AND THEN INTO FLORIDA FRI AFTERNOON. THE STRONGEST WINDS WILL BE OVER THE NE SEMICIRCLE WITH THE TIGHT GRADIENT BETWEEN THE LOW AND THE RIDGE TO THE NE. HIGH PRES RIDGE REDEVELOPS ALONG 31N SAT AND SUN WITH ELY WINDS TO 20 KT S OF 25N OVER THE WEEKEND. ASCAT AND A COUPLE OF SHIP REPORTS INDICATE 20 KT ELY WINDS OVER THE NW CARIBBEAN W OF AROUND 84W. THESE WINDS SHOULD DECREASE ON THU AS THE PRES GRADIENT DECREASE BETWEEN THE ATLC RIDGE AND A TROPICAL WAVE IN THE SW GULF OF MEXICO. TROPICAL WAVE IN THE CENTRAL CARIBBEAN ALONG 76W WILL MOVE INTO THE W CARIBBEAN THU THROUGH SAT. ANOTHER TROPICAL WAVE WELL E OF THE AREA WILL ENTER THE TROPICAL N ATLC WATERS BY FRI AND THE E CARIBBEAN SAT. E-SE WINDS INCREASE TO 20 KT E OF 70W ON THU AND INCREASE TO 20-25 KT...WITH SEAS TO 9 FT FROM 65W-75W SAT THEN DECREASE SOME ON SUN. WARNINGS... ATLC... .NONE. CARIBBEAN... .NONE. GULF OF MEXICO... .NONE. FOR ADDITIONAL INFORMATION PLEASE VISIT HTTP://WWW.HURRICANES.GOV/MARINE $$ FORECASTER DGS