Alert archive / Puerto Rico / Flash Flood Warnings in 2011

Flash Flood Warning 99, NWS JSJ

August 21, 2011

NWS JSJ issued this flash flood warning at Aug 21, 2011, 10:31 PM CDT. It was in force for 9 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 21, 2011, 10:31 PM CDT (03:31 UTC)
Expired: Aug 22, 2011, 7:30 AM CDT
In force: 9 hr
Issued by: NWS JSJ
Area: Storm-based polygon
Flood severity: None

What was reported inside it

Time	Report	Where	Remark
Aug 22, 7:00 AM CDT	HEAVY RAIN 10.51	Naguabo, PR	USGS NGHP4 SENSOR AT QUEBRADA GUABA IN NAGUABO RECORDED 10.51 INCHES IN A 24 HOUR PERIOD ENDING AT 8AM THIS MORNING.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The text

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

306 
WGCA52 TJSJ 220331
FFWSJU
PRC015-029-031-037-053-063-069-077-085-087-089-095-103-109-119-129-
151-220630-
/O.NEW.TJSJ.FF.W.0099.110822T0331Z-110822T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
1131 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
     JUNCOS
     GURABO
     SAN LORENZO
     LAS PIEDRAS
     ARROYO
     LUQUILLO
     PATILLAS
     MAUNABO
     NAGUABO
     CEIBA
     CANOVANAS
     FAJARDO
     CAROLINA
     HUMACAO
     LOIZA
     RIO GRANDE
     YABUCOA

* UNTIL 230 AM AST

* AT 1124 PM AST...DOPPLER RADAR INDICATED BANDS ASSOCIATED WITH 
TROPICAL STORM IRENE PRODUCING TORRENTIAL RAINFALL MOVING ACROSS 
THESE SECTIONS OF PUERTO RICO AND WILL PRODUCE RAPID RISES IN MAJOR 
RIVERS AND TRIBUTARIES. ALSO...U.S.G.S RIVER SENSORS INDICATED RAPID 
RISES IN RIVERS ACROSS THESE MUNICIPALITIES.

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.

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.

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 1815 6601 1844 6592 1836 6562 1823 6559
      1799 6586 1793 6600 1793 6603

$$

CASTRO

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

3 follow-up statements

627 
WGCA72 TJSJ 220435
FFSSJU

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN JUAN PR
1235 AM AST MON AUG 22 2011

PRC015-029-031-037-053-063-069-077-085-087-089-095-103-109-119-129-
151-220630-
/O.CON.TJSJ.FF.W.0099.000000T0000Z-110822T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JUNCOS PR-GURABO PR-SAN LORENZO PR-LAS PIEDRAS PR-ARROYO PR-
LUQUILLO PR-PATILLAS PR-MAUNABO PR-NAGUABO PR-CEIBA PR-CANOVANAS PR-
FAJARDO PR-CAROLINA PR-HUMACAO PR-LOIZA PR-RIO GRANDE PR-YABUCOA PR-
1235 AM AST MON AUG 22 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 230 AM AST FOR
YABUCOA...RIO GRANDE...LOIZA...HUMACAO...CAROLINA...FAJARDO...
CANOVANAS...CEIBA...NAGUABO...MAUNABO...PATILLAS...LUQUILLO...
ARROYO...LAS PIEDRAS...SAN LORENZO...GURABO AND JUNCOS
MUNICIPALITIES...

AT 1224 AM AST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE VERY HEAVY RAIN ACROSS THESE MUNICIPALITIES. THE U.S.G.S 
RIVER SENSORS INDICATED RIO BLANCO AT NAGUABO WAS OUT OF ITS BANKS. 
MUDSLIDES ARE LIKELY IN STEEP TERRAIN.

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 1815 6601 1844 6592 1836 6562 1823 6559
      1799 6586 1793 6600 1793 6603

$$

CASTRO

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

125 
WGCA72 TJSJ 220447
FFSSJU

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN JUAN PR
1247 AM AST MON AUG 22 2011

PRC015-029-031-037-053-063-069-077-085-087-089-095-103-109-119-129-
151-220630-
/O.CON.TJSJ.FF.W.0099.000000T0000Z-110822T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JUNCOS PR-GURABO PR-SAN LORENZO PR-LAS PIEDRAS PR-ARROYO PR-
LUQUILLO PR-PATILLAS PR-MAUNABO PR-NAGUABO PR-CEIBA PR-CANOVANAS PR-
FAJARDO PR-CAROLINA PR-HUMACAO PR-LOIZA PR-RIO GRANDE PR-YABUCOA PR-
1247 AM AST MON AUG 22 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 230 AM AST FOR
YABUCOA...RIO GRANDE...LOIZA...HUMACAO...CAROLINA...FAJARDO...
CANOVANAS...CEIBA...NAGUABO...MAUNABO...PATILLAS...LUQUILLO...
ARROYO...LAS PIEDRAS...SAN LORENZO...GURABO AND JUNCOS
MUNICIPALITIES...

AT 1236 AM AST...U.S.G.S RIVER SENSOR HAS INDICATED FOUR HOUR TOTAL 
RAINFALL ACCUMULATION OF 3.77 INCHES OVER THE RIO BLANCO BASIN IN 
NAGUABO...4.09 INCHES OVER LA PLATA RIVER IN NARANJITO...AND ALSO  
FAJARDO RIVER WAS  OUT OF ITS BANKS. RAINFALL ACROSS THESE AREAS THE 
REST OF THE MORNING HOURS WILL CONTINUE TO PRODUCE DANGEROUS 
FLOODING ALONG THESE RIVERS. 

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.

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

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.

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN SAN
JUAN.

&&

LAT...LON 1815 6601 1844 6592 1836 6562 1823 6559
      1799 6586 1793 6600 1793 6603

$$

CASTRO

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

417 
WGCA52 TJSJ 220622
FFWSJU
PRC015-029-031-037-053-063-069-077-085-087-089-095-103-109-119-129-
151-221230-
/O.EXT.TJSJ.FF.W.0099.000000T0000Z-110822T1230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
222 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
     JUNCOS
     GURABO
     SAN LORENZO
     LAS PIEDRAS
     ARROYO
     LUQUILLO
     PATILLAS
     MAUNABO
     NAGUABO
     CEIBA
     CANOVANAS
     FAJARDO
     CAROLINA
     HUMACAO
     LOIZA
     RIO GRANDE
     YABUCOA

* UNTIL 830 AM AST

* AT 215 AM AST...TORRENTIAL RAINFALL ASSOCIATED WITH TROPICAL STORM 
IRENE CONTINUES AFFECTING THESE MUNICIPALITIES. RIO BLANCO 
RIVER...RIO FAJARDO AND RIO LA PLATA IN COMERIO WERE ALL OUT OF ITS 
BANKS. 

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN SAN
JUAN.

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.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

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 1815 6601 1844 6592 1836 6562 1823 6559
      1799 6586 1793 6600 1793 6603

$$

CASTRO

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.

Issued	Product	Office	Lasted
Aug 21, 8:54 PM CDT	Flash Flood Warning	JSJ	12 hr
Aug 21, 11:26 PM CDT	Flash Flood Warning	JSJ	10 hr
Aug 22, 5:56 AM CDT	Flash Flood Warning	JSJ	4 hr
Aug 22, 6:26 AM CDT	Small Craft Advisory	JSJ	13 hr
Aug 22, 6:54 AM CDT	Flash Flood Warning	JSJ	5 hr
Aug 22, 7:30 AM CDT	Flash Flood Warning	JSJ	2 hr
Aug 22, 8:44 AM CDT	Flash Flood Warning	JSJ	2 hr
Aug 22, 9:29 AM CDT	Areal Flood Warning	JSJ	21 hr
Aug 22, 10:14 AM CDT	Areal Flood Warning	JSJ	58 hr
Aug 22, 10:28 AM CDT	Areal Flood Advisory	JSJ	6 hr
Aug 22, 12:20 PM CDT	Areal Flood Warning	JSJ	13 hr
Aug 22, 12:52 PM CDT	Areal Flood Advisory	JSJ	3 hr
Aug 22, 2:33 PM CDT	Areal Flood Warning	JSJ	9 hr
Aug 22, 3:51 PM CDT	Areal Flood Warning	JSJ	9 hr
Aug 22, 4:06 PM CDT	Flash Flood Warning	JSJ	6 hr
Aug 22, 5:17 PM CDT	Flash Flood Warning	JSJ	6 hr
Aug 22, 5:35 PM CDT	Areal Flood Advisory	JSJ	7 hr

Nearby

Flash Flood Warnings in Puerto Rico, 2011 Every 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; local storm reports from the same archive.