Hazardous Weather Outlook
ISLANDS NATIONAL WEATHER SERVICE SAN JUAN PR 621 AM AST FRI SEP 19 2008 AMZ710>750-PRZ001>013-201030- SAN JUAN AND VICINITY-NORTHEAST-SOUTHEAST-EASTERN INTERIOR- NORTH CENTRAL-CENTRAL INTERIOR-PONCE AND VICINITY-NORTHWEST- WESTERN INTERIOR-MAYAGUEZ AND VICINITY-SOUTHWEST-CULEBRA-VIEQUES- THE NEARSHORE AND OFF SHORE ATLANTIC AND CARIBBEAN COASTAL WATERS- 621 AM AST FRI SEP 19 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PUERTO RICO AND THE ADJACENT COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT A RELATIVELY MOIST ATMOSPHERE ACROSS THE REGION TODAY WILL COMBINE WITH DAYTIME HEATING AND LOCAL TERRAIN EFFECTS TO PROMOTE THE DEVELOPMENT OF DIURNALLY INDUCED SHOWERS AND THUNDERSTORMS ACTIVITY ACROSS PUERTO RICO ESPECIALLY THIS AFTERNOON. THE SHOWER ACTIVITY WILL BE ENHANCED BY AN UPPER LEVEL TROUGH ACROSS THE REGION...LEADING TO MINOR URBAN AND SMALL STREAM FLOODING THIS AFTERNOON AND EVENING MAINLY ACROSS THE SOUTHWEST TWO THIRDS OF THE ISLAND. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY AN AREA OF DISTURBED WEATHER ASSOCIATED WITH A TROPICAL WAVE CROSSING THE LESSER ANTILLES AND ENTERING THE EASTERN CARIBBEAN FRIDAY MORNING...IS PRODUCING CONSIDERABLE CLOUDINESS...SHOWERS AND THUNDERSTORMS ACROSS THE LEEWARD AND WINDWARD ISLANDS. SOME ADDITIONAL ORGANIZATION OF THIS SYSTEM IS POSSIBLE OVER THE NEXT COUPLE OF DAYS AS IT MOVES SLOWLY ACROSS THE EASTERN CARIBBEAN SEA. THIS FEATURE WILL COMBINE WITH FAVORABLE UPPER LEVEL CONDITIONS...TO PRODUCE SHOWERS AND THUNDERSTORMS WITH LOCALLY GUSTY WINDS ACROSS THE LOCAL ISLANDS SATURDAY AND SUNDAY. A WET WEATHER PATTERN IS FORECAST TO PREVAIL ACROSS PUERTO RICO UNTIL AT LEAST MONDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL BE REQUIRED SATURDAY AND SUNDAY. $$
ISLANDS NATIONAL WEATHER SERVICE SAN JUAN PR 621 AM AST FRI SEP 19 2008 AMZ720-730-VIZ001-002-201030- ST. THOMAS ST. JOHN ADJACENT ISLANDS-ST CROIX- NEARSHORE ATLANTIC AND ADJACENT CARIBBEAN COASTAL WATERS- 621 AM AST FRI SEP 19 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE U.S. VIRGIN ISLANDS AND THE ADJACENT COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT A RELATIVELY MOIST ATMOSPHERE ACROSS THE REGION TODAY WILL COMBINE WITH DAYTIME HEATING AND LOCAL ISLANDS EFFECTS TO PROMOTE THE DEVELOPMENT OF DIURNALLY INDUCED SHOWERS AND THUNDERSTORMS ACTIVITY ACROSS THE LOCAL ISLANDS AND SURROUNDING WATERS THIS AFTERNOON. THE SHOWER ACTIVITY WILL BE ENHANCED BY AN UPPER LEVEL TROUGH ACROSS THE REGION. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY AN AREA OF DISTURBED WEATHER ASSOCIATED WITH A TROPICAL WAVE CROSSING THE LESSER ANTILLES AND ENTERING THE EASTERN CARIBBEAN FRIDAY MORNING...IS PRODUCING CONSIDERABLE CLOUDINESS...SHOWERS AND THUNDERSTORMS ACROSS THE LEEWARD AND WINDWARD ISLANDS. SOME ADDITIONAL ORGANIZATION OF THIS SYSTEM IS POSSIBLE OVER THE NEXT COUPLE OF DAYS AS IT MOVES SLOWLY ACROSS THE EASTERN CARIBBEAN SEA. THIS FEATURE WILL COMBINE WITH FAVORABLE UPPER LEVEL CONDITIONS...TO PRODUCE SHOWERS AND THUNDERSTORMS WITH LOCALLY GUSTY WINDS ACROSS THE LOCAL ISLANDS SATURDAY AND SUNDAY. A WET WEATHER PATTERN IS FORECAST TO PREVAIL ACROSS THE U.S. VIRGIN ISLANDS UNTIL AT LEAST MONDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL BE REQUIRED SATURDAY AND SUNDAY. $$
Short Term Forecast
SHORT TERM FORECAST NATIONAL WEATHER SERVICE SAN JUAN PR 1214 AM AST SAT SEP 20 2008 PRZ001>004-012-013-VIZ001-002-200800- SAN JUAN AND VICINITY-NORTHEAST-SOUTHEAST-CULEBRA-EASTERN INTERIOR-VIEQUES-ST. THOMAS...ST. JOHN... AND ADJACENT ISLANDS-ST CROIX- 1214 AM AST SAT SEP 20 2008 .NOW... QUICK PASSING SHOWERS AND ISOLATED THUNDERSTORMS WILL CONTINUE TO MOVE WEST SOUTHWEST ACROSS THE LOCAL WATERS AND REACH THE COASTAL SECTIONS OF EASTERN PUERTO RICO...AND PARTS OF THE U.S. VIRGIN ISLANDS AT LEAST UNTIL 400 AM AST. THE SHOWERS WERE MOVING AROUND 25 MPH...AND WILL MOVE MAINLY ACROSS THE COASTAL SECTIONS PRODUCING BRIEF PERIODS OF MODERATE TO LOCALLY HEAVY DOWNPOURS. THIS WILL RESULT IN BRIEF WIND GUSTS...PONDING OF WATER ON STREETS AND ROADWAYS...HAZARDOUS DRIVING CONDITIONS WITH REDUCED VISIBILITIES. RAINFALL AMOUNTS OF LESS THAN HALF AN INCH EXPECTED AS THE SHOWERS PASS BY. $$ RAM