Alert archive / Puerto Rico / Flash Flood Warnings in 2011

Flash Flood Warning 98, NWS JSJ

August 21, 2011

NWS JSJ issued this flash flood warning at Aug 21, 2011, 8:54 PM CDT. It was in force for 12 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 21, 2011, 8:54 PM CDT (01:54 UTC)
Expired
Aug 22, 2011, 8:45 AM CDT
In force
12 hr
Issued by
NWS JSJ
Area
Storm-based polygon
Flood severity
None

The radar

The San Juan radar (TJUA), 73 km from the middle of the area, began a volume at 01:55 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.

The text

As transmitted, in the capitals the NWS used until 2016.

778 
WGCA52 TJSJ 220154
FFWSJU
PRC049-147-220745-
/O.NEW.TJSJ.FF.W.0098.110822T0154Z-110822T0745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
954 PM AST SUN AUG 21 2011

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  THE FOLLOWING MUNICIPALITIES

  IN PUERTO RICO
     CULEBRA
     VIEQUES

* UNTIL 345 AM AST

* AT 950 PM AST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
VERY HEAVY RAIN AND STRONG WINDS OVER CULEBRA AND VIEQUES. THIS 
HEAVY RAIN IS EXPECTED TO CONTINUE FOR THE NEXT SEVERAL HOURS AS 
TROPICAL STORM IRENE CONTINUES TO MOVE TO THE WEST-NORTHWEST. THIS 
ACTIVITY WILL CAUSE FLASH FLOODING ACROSS THE ISLANDS. MUDSLIDES CAN 
BE EXPECTED.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

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 1824 6525 1821 6531 1818 6526 1808 6529
      1803 6545 1807 6560 1822 6548 1821 6531
      1829 6541 1838 6535 1835 6522

$$

CASTRO

ADDITIONAL INFORMATION CAN BE FOUND AT /USE LOWER CASE LETTERS/:
     HTTP://WWW.WEATHER.GOV/SANJUAN
2 follow-up statements
771 
WGCA52 TJSJ 220742
FFWSJU
PRC049-147-221145-
/O.EXT.TJSJ.FF.W.0098.000000T0000Z-110822T1145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
342 AM AST MON AUG 22 2011

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  THE FOLLOWING MUNICIPALITIES

  IN PUERTO RICO
     CULEBRA
     VIEQUES

* UNTIL 745 AM AST

* AT 333 AM AST...SATELITE IMAGES SHOWED ANOTHER BAND OF SHOWERS 
ASSOCIATED WITH TROPICAL STORM IRENE SOUTHEAST OF VIEQUES. THIS BAND 
WILL MOVE TOWARD THE WEST NORTHWEST AND WILL AFFECT VIEQUES AND 
CULEBRA THROUGH AT LEAST 745 AM AST...PRODUCING ANOTHER ROUND OF 
TORRENTIAL RAINFALL. THEREFORE...THE FLASH FLOOD WARNING HAS BEEN 
EXTENDED UNTIL 745 AM AST.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

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 1824 6525 1821 6531 1818 6526 1808 6529
      1803 6545 1807 6560 1822 6548 1821 6531
      1829 6541 1838 6535 1835 6522

$$

CASTRO

ADDITIONAL INFORMATION CAN BE FOUND AT /USE LOWER CASE LETTERS/:
     HTTP://WWW.WEATHER.GOV/SANJUAN
642 
WGCA52 TJSJ 221141
FFWSJU
PRC049-147-221345-
/O.EXT.TJSJ.FF.W.0098.000000T0000Z-110822T1345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
741 AM AST MON AUG 22 2011

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  THE FOLLOWING MUNICIPALITIES

  IN PUERTO RICO
     CULEBRA
     VIEQUES

* UNTIL 945 AM AST

* AT 735 AM AST... TERMINAL DOPPLER RADAR AND SATELLITE IMAGES 
INDICATE THAT THERE ARE MODERATE SHOWERS STILL AFFECTING VIEQUES AND 
CULEBRA. THEREFORE THE FLASH FLOOD WARNING HAS BEEN EXTENDED UNTIL 
945 AM AST.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD RELATED DEATHS OCCUR
IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS WATER COVERED BRIDGES...
DIPS...OR LOW WATER CROSSINGS. NEVER TRY TO CROSS A FLOWING STREAM...
EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER
GROUND.

&&

LAT...LON 1824 6525 1821 6531 1818 6526 1808 6529
      1803 6545 1807 6560 1822 6548 1821 6531
      1829 6541 1838 6535 1835 6522

$$

JJA

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

The office that day

Everything else NWS JSJ issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 21, 10:31 PM CDTFlash Flood WarningJSJ9 hr
Aug 21, 11:26 PM CDTFlash Flood WarningJSJ10 hr
Aug 22, 5:56 AM CDTFlash Flood WarningJSJ4 hr
Aug 22, 6:26 AM CDTSmall Craft AdvisoryJSJ13 hr
Aug 22, 6:54 AM CDTFlash Flood WarningJSJ5 hr
Aug 22, 7:30 AM CDTFlash Flood WarningJSJ2 hr
Aug 22, 8:44 AM CDTFlash Flood WarningJSJ2 hr
Aug 22, 9:29 AM CDTAreal Flood WarningJSJ21 hr
Aug 22, 10:14 AM CDTAreal Flood WarningJSJ58 hr
Aug 22, 10:28 AM CDTAreal Flood AdvisoryJSJ6 hr
Aug 22, 12:20 PM CDTAreal Flood WarningJSJ13 hr
Aug 22, 12:52 PM CDTAreal Flood AdvisoryJSJ3 hr
Aug 22, 2:33 PM CDTAreal Flood WarningJSJ9 hr
Aug 22, 3:51 PM CDTAreal Flood WarningJSJ9 hr
Aug 22, 4:06 PM CDTFlash Flood WarningJSJ6 hr
Aug 22, 5:17 PM CDTFlash Flood WarningJSJ6 hr
Aug 22, 5:35 PM CDTAreal Flood AdvisoryJSJ7 hr

Nearby

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

Sources

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.