Alert archive / Puerto Rico / Flash Flood Watches in 2008

Flash Flood Watch 1, NWS JSJ

April 27, 2008

NWS JSJ issued this flash flood watch at Apr 27, 2008, 9:42 AM CDT. It took effect at Apr 27, 2008, 10:00 AM CDT. It was in force for 11 hr.

The area

The counties it named.

The facts

Issued
Apr 27, 2008, 9:42 AM CDT (14:42 UTC)
In effect from
Apr 27, 2008, 10:00 AM CDT
Expired
Apr 27, 2008, 9:00 PM CDT
In force
11 hr
Issued by
NWS JSJ
Flood severity
None

What forecasters said that day

The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS JSJ wrote its last area forecast discussion before this flash flood watch went out at Apr 27, 5:17 AM CDT, 4 hours 25 minutes earlier.

Area forecast discussion, Apr 27, 5:17 AM CDT, 4 hours 25 minutes before
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Hazardous weather outlook, Apr 27, 6:16 AM CDT, 3 hours 26 minutes before
HAZARDOUS WEATHER OUTLOOK FOR PUERTO RICO AND THE U.S. VIRGIN
ISLANDS
NATIONAL WEATHER SERVICE SAN JUAN PR
716 AM AST SUN APR 27 2008

AMZ710>750-PRZ001>013-281130-
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-
716 AM AST SUN APR 27 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PUERTO RICO AND THE
ADJACENT COASTAL WATERS.

.DAY ONE...TODAY AND TONIGHT

ABUNDANT LOW LEVEL MOISTURE ASSOCIATED TO A LOW LEVEL TROUGH
MOVING ACROSS THE FORECAST AREA THIS MORNING...AND EXPECTED TO
MOVE WESTWARD THROUGH THIS EVENING...WILL COMBINE WITH DIURNAL
HEATING AND LOCAL ISLAND EFFECTS TO PRODUCE MODERATE TO HEAVY
SHOWER ACTIVITY AND THUNDERSTORMS ACROSS MOST OF PUERTO RICO THIS
AFTERNOON. HOWEVER...WE ARE ANTICIPATING THAT THE HEAVIEST RAINFALL
MAY OCCUR OVER THE WESTERN HALF OF PUERTO RICO AND INTERIOR
SECTIONS OF THE ISLAND. FOR THE NEXT 12 HOURS OR SO...WE ARE
ESTIMATING ONE TO THREE INCHES OF RAIN OVER THESE AREAS.
HAVING SAID THAT...URBAN AND STREAM FLOOD STATEMENTS WILL BE
NEEDED AS SHOWERS AND THUNDERSTORMS BEGIN TO DEVELOP ACROSS LAND
AREAS LATER THIS AFTERNOON. THERE IS SLIGHT TO MODERATE CHANCE
FOR MUDSLIDES IN THE STEEP MOUNTAINOUS AREAS SUCH AS THOSE ACROSS
THE CORDILLERA CENTRAL AND EL YUNQUE.

A MODERATE EAST NORTHEAST WIND FLOW WILL PREVAIL THROUGH LATE THIS
AFTERNOON. HOWEVER...MARINERS SHOULD EXPECT PERIODS OF LOCALLY
HEAVY SHOWERS AND THUNDERSTORMS MAINLY OVER THE OFFSHORE ATLANTIC
AND CARIBBEAN WATERS THROUGH THE EVENING. THIS WILL CONTINUE TO
MAKE HAZARDOUS MARINE CONDITIONS ACROSS THE REGIONAL WATERS.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS REQUIRED

AMZ720-730-VIZ001-002-281130-
ST. THOMAS ST. JOHN ADJACENT ISLANDS-ST CROIX-
NEARSHORE ATLANTIC AND ADJACENT CARIBBEAN COASTAL WATERS-
716 AM AST SUN APR 27 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE U.S. VIRGIN ISLANDS AND
THE ADJACENT COASTAL WATERS.

.DAY ONE...TODAY AND TONIGHT

ABUNDANT LOW LEVEL MOISTURE ASSOCIATED TO A LOW LEVEL TROUGH
MOVING ACROSS THE FORECAST AREA THIS MORNING...AND EXPECTED TO
MOVE WESTWARD THROUGH THIS EVENING...WILL COMBINE WITH DIURNAL
HEATING AND LOCAL ISLAND EFFECTS TO PRODUCE MODERATE TO HEAVY
SHOWER ACTIVITY AND THUNDERSTORMS ACROSS MOST OF THE U.S. VIRGIN
ISLANDS THIS AFTERNOON. HOWEVER...WE ARE ANTICIPATING THAT THE
HEAVIEST RAINFALL MAY OCCUR OVER THE WESTERN HALF SECTORS OF ST
CROIX AND ST THOMAS. WE ARE ESTIMATING ONE TO TWO INCHES OF
RAINFALL WITHIN THE NEXT 12 HOURS OR SO. HAVING SAID THAT...URBAN
AND STREAM FLOOD STATEMENTS WILL BE NEEDED AS SHOWERS AND
THUNDERSTORMS BEGIN TO DEVELOP ACROSS LAND AREAS LATER THIS
AFTERNOON. THERE IS SLIGHT TO MODERATE CHANCE FOR MUDSLIDES IN THE
STEEP MOUNTAINOUS AREAS OF ST THOMAS AND ST CROIX. STAY TUNED FOR
ANY UPDATES DURING THE DAY THESE WEATHER CONDITIONS BEGIN TO
AFFECT THE ISLANDS AND COASTAL WATERS.

A MODERATE EAST NORTHEAST WIND FLOW WILL PREVAIL THROUGH LATE THIS
AFTERNOON. HOWEVER...MARINERS SHOULD EXPECT PERIODS OF LOCALLY
HEAVY SHOWERS AND THUNDERSTORMS MAINLY OVER THE OFFSHORE ATLANTIC
AND CARIBBEAN WATERS THROUGH THE EVENING. THIS WILL CONTINUE TO
MAKE HAZARDOUS MARINE CONDITIONS ACROSS THE REGIONAL WATERS.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS REQUIRED

The office that day

Everything else NWS JSJ issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 27, 4:15 PM CDTFlash Flood WarningJSJ2 hr
Apr 27, 4:24 PM CDTFlash Flood WarningJSJ2 hr
Apr 27, 4:24 PM CDTFlash Flood WarningJSJ2 hr
Apr 27, 4:36 PM CDTFlash Flood WarningJSJ114 min
Apr 27, 4:56 PM CDTSpecial Marine WarningJSJ2 hr
Apr 27, 5:53 PM CDTFlash Flood WarningJSJ3 hr
Apr 27, 6:09 PM CDTFlash Flood WarningJSJ2 hr
Apr 27, 6:25 PM CDTFlash Flood WarningJSJ2 hr
Apr 27, 6:35 PM CDTFlash Flood WarningJSJ9 hr
Apr 27, 6:42 PM CDTSpecial Marine WarningJSJ2 hr

Nearby

Flash Flood Watches in Puerto Rico, 2008Flash Flood Watches in U.S. Virgin Islands, 2008Every flash flood watch in 2008

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.