Forecast for St. Thomas...St. John... and Adjacent Islands
Updated: 4:22 am AST on October 14, 2008
Flash Flood Watch in effect through Wednesday evening...
Tropical storm watch in effect...
Today
Cloudy. Showers and isolated thunderstorms early in the morning...then showers and scattered thunderstorms in the late morning and afternoon. Some thunderstorms may produce gusty winds and heavy rainfall in the late morning and afternoon. Highs 86 lower elevations ranging to 80 higher elevations. Southeast winds 10 to 15 mph. Chance of rain 90 percent.
Mostly cloudy with showers and scattered thunderstorms. Some thunderstorms may produce heavy rainfall. Lows 81 lower elevations ranging to 74 higher elevations. Southeast winds 5 to 10 mph. Chance of rain 90 percent.
Wednesday
Tropical storm conditions possible. Mostly cloudy. Showers and scattered thunderstorms in the morning...then numerous showers and isolated thunderstorms in the afternoon. Some thunderstorms may produce heavy rainfall in the morning. Highs 86 lower elevations ranging to 80 higher elevations. Southeast winds 10 to 15 mph increasing to 35 to 40 mph in the afternoon. Chance of rain 90 percent.
Tropical storm conditions possible. Variably cloudy with scattered showers. Lows 81 lower elevations ranging to 74 higher elevations. Southeast winds 40 to 50 mph becoming southwest and increasing to 55 to 65 mph after midnight. Chance of rain 40 percent.
Thursday
Tropical storm conditions possible. Variably cloudy. Scattered showers in the morning...then scattered showers and isolated thunderstorms in the afternoon. Highs 87 lower elevations ranging to 81 higher elevations. Northwest winds 35 to 45 mph becoming north around 25 mph in the afternoon. Chance of rain 40 percent.
Variably cloudy. Scattered showers and isolated thunderstorms in the evening...then scattered showers after midnight. Lows 81 lower elevations ranging to 74 higher elevations. Chance of rain 40 percent.
Friday
Variably cloudy with scattered showers and isolated thunderstorms. Highs 87 lower elevations ranging to 81 higher elevations. Chance of rain 40 percent.
Friday Night
Mostly cloudy with scattered showers and isolated thunderstorms. Lows 81 lower elevations ranging to 74 higher elevations. Chance of rain 50 percent.
Saturday
Partly cloudy. Scattered showers and isolated thunderstorms in the morning...then isolated showers in the afternoon. Highs 87 lower elevations ranging to 81 higher elevations. Chance of rain 50 percent.
Saturday Night
Partly cloudy with scattered showers. Lows 81 lower elevations ranging to 74 higher elevations. Chance of rain 40 percent.
Sunday
Partly cloudy with scattered showers. Highs 87 lower elevations ranging to 81 higher elevations. Chance of rain 40 percent.
Sunday Night
Partly cloudy. Scattered showers in the evening... then isolated showers after midnight. Locally heavy rainfall possible. Lows 81 lower elevations ranging to 74 higher elevations. Chance of rain 30 percent.
Monday
Partly cloudy with isolated showers and thunderstorms in the morning...then variably cloudy with scattered showers and isolated thunderstorms in the afternoon. Locally heavy rainfall possible. Highs 87 lower elevations ranging to 81 higher elevations. Chance of rain 30 percent.
... Flash Flood Watch remains in effect through Wednesday evening...
The Flash Flood Watch continues for
* all of Puerto Rico... including Culebra and Vieques... and all of the U.S. Virgin Islands.
* Through Wednesday evening
* abundant tropical moisture... associated with the outer fringes of Tropical Depression Fifteen... will continue to lift north and bring occasional bands of showers and thunderstorms with gusty winds to all of Puerto Rico... Culebra and Vieques... and all of the U.S. Virgin Islands overnight through early Tuesday... with these bands becoming stronger and more frequent later Tuesday and Tuesday night and then continuing through Wednesday evening. Given this scenario... heavy rains across the local islands during this prolonged period will result in significant rainfall accumulations over the next several days. Residents and visitors should therefore expect areas of moderate to heavy rainfall... with isolated rainfall totals ranging between 5 and 10 inches of rainfall through Tuesday... then increasing to 15 to 30 inches or more of accumulative rainfall through the end of the week. The depression is forecast to strengthen and eventually turn towards the north northeast and then northeast across Puerto Rico and the remainder or the local islands by mid week. Due to already saturated soils across much of the local area... only a small amount of additional rainfall would likely result in areas of Rapid River rises and flash and river flooding... along with mudslides and debris flow.
A Flash Flood Watch means that conditions are favorable for heavy rain across the watch area... which may lead to flooding. If you are in the watch area... check your preparedness requirements... especially if you have interests along area rivers. Keep informed... and be ready for quick action if flooding is observed or if a Flash Flood Warning is issued.
People in the watch area should continue to be aware of the possibility for heavy rainfall. Avoid low lying areas... and be careful when approaching Highway dips and underpasses. The heavy rain could also cause mudslides in areas of steep terrain.
Please stay tuned to NOAA Weather Radio... local TV... radio or your cable television provider for later statements and possible warnings.
This product... along with other weather... hydrological and climate information... is available on the web at http://www.Srh.NOAA.Gov/sju or at http://weather.Gov.
