Flash Flood Warning 41, NWS JSJ

Issued

May 27, 2011, 5:10 PM CDT (22:10 UTC)

Expired

May 27, 2011, 11:00 PM CDT

In force

6 hr

Issued by

NWS JSJ

Area

Storm-based polygon

Flood severity

None

The San Juan radar (TJUA), 30 km from the middle of the area, began a volume at 22:09 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

091 
WGCA52 TJSJ 272210
FFWSJU
PRC021-051-135-137-280400-
/O.NEW.TJSJ.FF.W.0041.110527T2210Z-110528T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
610 PM AST FRI MAY 27 2011

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  THE FOLLOWING MUNICIPALITIES

  IN PUERTO RICO
     BAYAMON
     TOA ALTA
     DORADO
     TOA BAJA

* UNTIL MIDNIGHT AST

* AT 601 PM AST...RAIN FROM UPSTREAM IN THE RIO LA PLATA BASIN HAS 
CAUSED GATES TO BE OPENED IN THE DAMS AND CONSIDERABLE WATER IS 
RUNNING DOWN STREAM TOWARD TOA BAJA.

FOR THE RIO DE LA PLATA NEAR NARANJITO - NASP4
     FLOOD STAGE - 16 FEET.
     AT 601 PM AST...THE USGS SENSOR INDICATED THE RIVER HAD RISEN   
     TO 16.12 FEET. MINOR FLOODING IS FORECAST WITH A CREST THAT MAY 
     REACH 18 FEET LATER THIS EVENING.

FOR THE RIO DE LA PLATA NEAR TOA ALTA - TOAP4
     FLOOD STAGE - 16 FEET.
     AT 601 PM AST...THE USGS SENSOR INDICATED THE RIVER HAD RISEN   
     TO 3.73 FEET. IT IS EXPECTED TO BEGIN RISING BEFORE 7:30 PM AST 
     AND FLOOD SOMETIME BEFORE 10 PM AST. MINOR FLOODING IS FORECAST.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

&&

LAT...LON 1830 6622 1831 6621 1833 6622 1832 6623
      1836 6625 1842 6627 1848 6627 1847 6624
      1842 6625 1836 6622 1832 6620 1829 6620
      1827 6620 1827 6621

$$

SNELL

ADDITIONAL INFORMATION CAN BE FOUND AT /USE LOWER CASE LETTERS/:
     HTTP://WWW.WEATHER.GOV/SANJUAN

662 
WGCA72 TJSJ 280358
FFSSJU

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN JUAN PR
1158 PM AST FRI MAY 27 2011

PRC021-051-135-137-280403-
/O.EXP.TJSJ.FF.W.0041.000000T0000Z-110528T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BAYAMON PR-TOA ALTA PR-DORADO PR-TOA BAJA PR-
1158 PM AST FRI MAY 27 2011

...THE FLASH FLOOD WARNING WILL EXPIRE AT MIDNIGHT AST FOR TOA
BAJA...DORADO...TOA ALTA AND BAYAMON MUNICIPALITIES...

LATEST READINGS OF THE RIO DE LA PLATA AT TOA ALTA INDICATED THAT 
THE RIVER HAS CRESTED AND IS NOW FALLING AND FLOODING IS NO LONGER 
EXPECTED. THEREFORE...THE FLASH FLOOD WARNING WILL BE ALLOWED TO 
EXPIRE AT MIDNIGHT AST.

HOWEVER...RESIDENTS AND MOTORISTS ACROSS THESE AREAS SHOULD HOWEVER 
BE ALERT TO PONDING OF WATER ON ROADWAYS AND ALLOW TIME FOR 
STREAMS...CREEKS AND RIVERS TO RETURN TO NORMAL LEVELS.

LAT...LON 1830 6622 1831 6621 1833 6622 1832 6623
      1836 6625 1842 6627 1848 6627 1847 6624
      1842 6625 1836 6622 1832 6620 1829 6620
      1827 6620 1827 6621

$$

ER

ADDITIONAL INFORMATION CAN BE FOUND AT /USE LOWER CASE LETTERS/:
     HTTP://WWW.WEATHER.GOV/SANJUAN

Flash Flood Warnings in Puerto Rico, 2011Every flash flood warning in 2011

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