FLCA42 TJSJ 201049
HWOSJU
HAZARDOUS WEATHER OUTLOOK FOR PUERTO RICO AND THE U.S. VIRGIN
ISLANDS
NATIONAL WEATHER SERVICE SAN JUAN PR
649 AM AST SAT SEP 20 2008
AMZ710>750-PRZ001>013-211100-
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-
649 AM AST SAT SEP 20 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 THIS AFTERNOON. THE SHOWER ACTIVITY
WILL BE ENHANCED BY AN UPPER LEVEL TROUGH ACROSS THE REGION...
LEADING TO MINOR URBAN AND SMALL STREAM FLOODING DUE TO LOCALLY
HEAVY RAINFALL IN SOME AREAS...MAINLY ACROSS THE WEST INTERIOR AND 
SOUTHWEST SECTIONS OF THE ISLAND.
.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY
AN AREA OF DISTURBED WEATHER ASSOCIATED WITH A TROPICAL WAVE
MOVING SLOWLY ACROSS THE LESSER ANTILLES AND THE EASTERN CARIBBEAN
WILL HELP MAINTAIN MOIST AND UNSTABLE WEATHER CONDITIONS ACROSS
THE REGION. THEREFORE THERE IS HIGH POTENTIAL FOR FLASH FLOODING
DUE TO LOCALLY HEAVY RAINFALL OVER THE NEXT FEW DAYS. ADDITIONAL
ORGANIZATION OF THIS SYSTEM IS POSSIBLE AS IT MOVES WEST NORTHWEST
ACROSS THE EASTERN CARIBBEAN. THE COMBINATION OF THIS FEATURE...LOCAL
AND DIURNAL INFLUENCES...AND FAVORABLE UPPER LEVEL CONDITIONS...WILL
ENHANCE SHOWERS AND THUNDERSTORMS WITH DANGEROUS LIGHTNING AND LOCALLY
GUSTY WINDS ACROSS THE LOCAL ISLANDS THROUGH AT LEAST MONDAY.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE REQUIRED SUNDAY THROUGH MONDAY.
$$
AMZ720-730-VIZ001-002-211100-
ST. THOMAS ST. JOHN ADJACENT ISLANDS-ST CROIX-
NEARSHORE ATLANTIC AND ADJACENT CARIBBEAN COASTAL WATERS-
649 AM AST SAT SEP 20 2008
THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE U.S. VIRGIN ISLANDS AND
THE ADJACENT COASTAL WATERS.
.DAY ONE...TODAY AND TONIGHT
A RELATIVELY MOIST ATMOSPHERE ACROSS THE REGION WILL COMBINE WITH
DAYTIME HEATING AND LOCAL TERRAIN EFFECTS TO PROMOTE THE DEVELOPMENT
OF DIURNALLY INDUCED SHOWERS AND THUNDERSTORMS ACTIVITY ACROSS PARTS
OF THE ISLANDS THIS AFTERNOON. SOME OF THE SHOWER ACTIVITY WILL BE
ENHANCED BY AN UPPER LEVEL TROUGH ACROSS THE REGION... AND MAY LEAD
TO MINOR FLOODING OF STREET AND ROADS AND POOR DRAINAGE AREAS.
.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY
AN AREA OF DISTURBED WEATHER ASSOCIATED WITH A TROPICAL WAVE MOVING
SLOWLY ACROSS THE LESSER ANTILLES AND THE EASTERN CARIBBEAN WILL HELP
MAINTAIN MOIST AND UNSTABLE WEATHER CONDITIONS ACROSS THE REGION.
THEREFORE THERE IS HIGH POTENTIAL FOR URBAN FLOODING DUE TO LOCALLY
HEAVY RAINFALL OVER THE NEXT FEW DAYS. ADDITIONAL ORGANIZATION OF
THIS SYSTEM IS POSSIBLE AS IT MOVES WEST NORTHWEST ACROSS THE
EASTERN CARIBBEAN. THE COMBINATION OF THIS FEATURE...LOCAL AND
DIURNAL INFLUENCES...AND FAVORABLE UPPER LEVEL CONDITIONS...WILL
ENHANCE SHOWERS AND THUNDERSTORMS WITH DANGEROUS LIGHTNING AND
LOCALLY GUSTY WINDS ACROSS THE LOCAL ISLANDS THROUGH AT LEAST
MONDAY.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE REQUIRED ON SUNDAY THROUGH MONDAY
$$