Alert archive / Puerto Rico / Flash Flood Warnings in 2011

Flash Flood Warning 132, NWS JSJ

September 13, 2011

NWS JSJ issued this flash flood warning at Sep 13, 2011, 12:24 AM CDT. It was in force for 19 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
Sep 13, 2011, 12:24 AM CDT (05:24 UTC)
Expired
Sep 13, 2011, 7:45 PM CDT
In force
19 hr
Issued by
NWS JSJ
Area
Storm-based polygon
Flood severity
None

The radar

The San Juan radar (TJUA), 37 km from the middle of the area, began a volume at 05:24 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.

877 
WGCA52 TJSJ 130524
FFWSJU
PRC043-075-133-149-131115-
/O.NEW.TJSJ.FF.W.0132.110913T0524Z-110913T1115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
124 AM AST TUE SEP 13 2011

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  THE FOLLOWING MUNICIPALITIES

  IN PUERTO RICO
     COAMO
     JUANA DIAZ
     SANTA ISABEL
     VILLALBA

* UNTIL 715 AM AST

* AT 119 AM AST...DOPPLER RADAR INDICATED SHOWERS AND THUNDERSTORMS 
WITH VERY HEAVY RAIN ACROSS VILLALBA...JUANA DIAZ AND COAMO MOVING 
REPEATEDLY OVER THE SAME AREAS. RADAR ESTIMATES INDICATE TWO TO FOUR 
INCHES HAVE ALREADY FALLEN ACROSS THE COAMO RIVER BASIN. THIS WILL 
CAUSE FLASH FLOODING IN LOW LYING AREAS ALONG THE TOA 
VACA...DESCALABRADO AND JACAGUAS 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.

&&

LAT...LON 1793 6638 1795 6642 1792 6646 1795 6643
      1798 6645 1797 6654 1814 6656 1818 6646
      1817 6633 1808 6626 1800 6634 1793 6632
      1797 6634 1794 6637 1793 6635 1794 6637
      1791 6639

$$

ROSA

ADDITIONAL INFORMATION CAN BE FOUND AT /USE LOWER CASE LETTERS/:
     HTTP://WWW.WEATHER.GOV/SANJUAN
7 follow-up statements
629 
WGCA72 TJSJ 130721
FFSSJU

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN JUAN PR
321 AM AST TUE SEP 13 2011

PRC043-075-133-149-131115-
/O.CON.TJSJ.FF.W.0132.000000T0000Z-110913T1115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COAMO PR-JUANA DIAZ PR-SANTA ISABEL PR-VILLALBA PR-
321 AM AST TUE SEP 13 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 715 AM AST FOR
VILLALBA...SANTA ISABEL...JUANA DIAZ AND COAMO MUNICIPALITIES...

AT 312 AM AST...RIVER GAGES ACROSS COAMO AND VILLALBA INDICATE THAT 
AS NEARLY EIGHT INCHES OF RAIN FELL ACROSS COAMO WITH THE RIO TOA 
VACA AT VILLALBA WELL ABOVE ITS FLOOD STAGE. PEOPLE TRAVELING IN 
THESE AREAS SHOULD USE EXTREME CAUTION THIS MORNING AND AVOID ANY 
FLOODED ROADWAYS. 

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.

&&

LAT...LON 1793 6638 1795 6642 1792 6646 1795 6643
      1798 6645 1797 6654 1814 6656 1818 6646
      1817 6633 1808 6626 1800 6634 1793 6632
      1797 6634 1794 6637 1793 6635 1794 6637
      1791 6639

$$

ROSA

ADDITIONAL INFORMATION CAN BE FOUND AT /USE LOWER CASE LETTERS/:
     HTTP://WWW.WEATHER.GOV/SANJUAN
469 
WGCA52 TJSJ 131108
FFWSJU
PRC043-075-133-149-131415-
/O.EXT.TJSJ.FF.W.0132.000000T0000Z-110913T1415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
708 AM AST TUE SEP 13 2011

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  THE FOLLOWING MUNICIPALITIES

  IN PUERTO RICO
     COAMO
     VILLALBA
     JUANA DIAZ
     SANTA ISABEL

* UNTIL 1015 AM AST

* AT 650 AM AST...DOPPLER RADAR INDICATED SHOWERS AND THUNDERSTORMS 
WITH VERY HEAVY RAIN ACROSS VILLALBA...JUANA DIAZ AND COAMO MOVING 
REPEATEDLY OVER THE SAME AREAS. THIS WILL CAUSE ADDITIONAL FLASH 
FLOODING IN LOW LYING ACROSS THESE MUNICIPALITIES. IN ADDITION... 
RIVER GAGES ACROSS SOUTH CENTRAL PUERTO RICO CONTINUE TO INDICATE 
THE TOA VACA RIVER IN VILLALBA STILL OUT OF ITS BANKS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN MOUNTAINOUS OR HILLY TERRAIN...THERE ARE HUNDREDS OF LOW WATER
CROSSINGS WHICH ARE POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT
ATTEMPT TO TRAVEL ACROSS FLOODED ROADS. FIND ALTERNATE ROUTES. IT
ONLY TAKES A FEW INCHES OF SWIFTLY FLOWING WATER TO CARRY VEHICLES
AWAY.

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 1793 6638 1795 6642 1792 6646 1795 6643
      1798 6645 1797 6654 1814 6656 1818 6646
      1817 6633 1808 6626 1800 6634 1793 6632
      1797 6634 1794 6637 1793 6635 1794 6637
      1791 6639

$$

ER

ADDITIONAL INFORMATION CAN BE FOUND AT /USE LOWER CASE LETTERS/:
     HTTP://WWW.WEATHER.GOV/SANJUAN
677 
WGCA52 TJSJ 131351
FFWSJU
PRC043-075-133-149-131715-
/O.EXT.TJSJ.FF.W.0132.000000T0000Z-110913T1715Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
951 AM AST TUE SEP 13 2011

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  THE FOLLOWING MUNICIPALITIES

  IN PUERTO RICO
     COAMO
     VILLALBA
     JUANA DIAZ
     SANTA ISABEL

* UNTIL 115 PM AST

* AT 943 AM AST...DOPPLER RADAR INDICATED SHOWERS AND THUNDERSTORMS 
WITH VERY HEAVY RAIN CONTINUING TO DEVELOP AND MOVE ACROSS THESE 
MUNICIPALITIES...THEREFORE THE FLASH FLOOD WARNING HAS BEEN EXTENDED 
UNTIL AT LEAST 115 PM...AST.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND
UNDERPASSES. ADDITIONALLY...ROADS AND LANDS ALONG THE BANKS OF
CREEKS...STREAMS AND OTHER LOW LYING AND POOR DRAINAGE AREAS ARE
SUBJECT TO FLOODING. MOTORISTS ARE URGED TO AVOID ROADS WHERE
EXCESSIVE PONDING IS OBSERVED.

IN MOUNTAINOUS OR HILLY TERRAIN...THERE ARE HUNDREDS OF LOW WATER
CROSSINGS WHICH ARE POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT
ATTEMPT TO TRAVEL ACROSS FLOODED ROADS. FIND ALTERNATE ROUTES. IT
ONLY TAKES A FEW INCHES OF SWIFTLY FLOWING WATER TO CARRY VEHICLES
AWAY.

&&

LAT...LON 1793 6638 1795 6642 1792 6646 1795 6643
      1798 6645 1797 6654 1814 6656 1818 6646
      1817 6633 1808 6626 1800 6634 1793 6632
      1797 6634 1794 6637 1793 6635 1794 6637
      1791 6639

$$

AAS

ADDITIONAL INFORMATION CAN BE FOUND AT /USE LOWER CASE LETTERS/:
     HTTP://WWW.WEATHER.GOV/SANJUAN
135 
WGCA72 TJSJ 131600
FFSSJU

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN JUAN PR
1200 PM AST TUE SEP 13 2011

PRC043-075-133-149-131715-
/O.CON.TJSJ.FF.W.0132.000000T0000Z-110913T1715Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COAMO PR-JUANA DIAZ PR-SANTA ISABEL PR-VILLALBA PR-
1200 PM AST TUE SEP 13 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 115 PM AST FOR
VILLALBA...SANTA ISABEL...JUANA DIAZ AND COAMO MUNICIPALITIES...

AT 1149 AM AST...WATER AUTHORITY OFFICIAL REPORTED THAT LEVEL OF THE 
TOA VACA LAKE IS RISING RAPIDLY. AT THIS RATE...IT IS A CONCERN THAT 
THE TOA VACA DAM COULD AUTOMATICALLY OPEN ITS GATES...IF THIS 
OCCURS...FLOODING DOWNSTREAM ALONG JACAGUAS RIVER IN VILLALBA AND 
JUANA DIAZ MUNICIPALITIES CAN BE EXPECTED.

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 1793 6638 1795 6642 1792 6646 1795 6643
      1798 6645 1797 6654 1814 6656 1818 6646
      1817 6633 1808 6626 1800 6634 1793 6632
      1797 6634 1794 6637 1793 6635 1794 6637
      1791 6639

$$

JJA/ER/AAS

ADDITIONAL INFORMATION CAN BE FOUND AT /USE LOWER CASE LETTERS/:
     HTTP://WWW.WEATHER.GOV/SANJUAN
458 
WGCA52 TJSJ 131706
FFWSJU
PRC043-075-133-149-131945-
/O.EXT.TJSJ.FF.W.0132.000000T0000Z-110913T1945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
106 PM AST TUE SEP 13 2011

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  THE FOLLOWING MUNICIPALITIES

  IN PUERTO RICO
     COAMO
     VILLALBA
     JUANA DIAZ
     SANTA ISABEL

* UNTIL 345 PM AST

* AT 1254 PM AST...DOPPLER RADAR INDICATED THAT BANDS OF SHOWERS AND 
THUNDERSTORMS CONTINUE TO MOVE ACROSS THESE WARNED AREAS. 
ADDITIONALLY...WATER AUTHORITY OFFICIALS REPORTED THAT LEVEL OF THE 
TOA VACA LAKE CONTINUES TO RISE WHICH MAY RESULT IN THE TOA VACA DAM 
GATES AUTOMATICALLY OPENING. IF THIS OCCURS...RAPID RISES AND 
FLOODING DOWNSTREAM ALONG JACAGUAS RIVER IN VILLALBA AND JUANA DIAZ 
MUNICIPALITIES CAN BE EXPECTED. THEREFORE...THE FLASH FLOOD WARNING 
HAS BEEN EXTENDED UNTIL AT LEAST 345 PM AST.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN MOUNTAINOUS OR HILLY TERRAIN...THERE ARE HUNDREDS OF LOW WATER
CROSSINGS WHICH ARE POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT
ATTEMPT TO TRAVEL ACROSS FLOODED ROADS. FIND ALTERNATE ROUTES. IT
ONLY TAKES A FEW INCHES OF SWIFTLY FLOWING WATER TO CARRY VEHICLES
AWAY.

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 1793 6638 1795 6642 1792 6646 1795 6643
      1798 6645 1797 6654 1814 6656 1818 6646
      1817 6633 1808 6626 1800 6634 1793 6632
      1797 6634 1794 6637 1793 6635 1794 6637
      1791 6639

$$

AAS

ADDITIONAL INFORMATION CAN BE FOUND AT /USE LOWER CASE LETTERS/:
     HTTP://WWW.WEATHER.GOV/SANJUAN
583 
WGCA52 TJSJ 131947
FFWSJU
PRC043-075-133-149-140045-
/O.EXT.TJSJ.FF.W.0132.000000T0000Z-110914T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
347 PM AST TUE SEP 13 2011

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  THE FOLLOWING MUNICIPALITIES

  IN PUERTO RICO
     COAMO
     VILLALBA
     JUANA DIAZ
     SANTA ISABEL

* UNTIL 845 PM AST

* AT 336 PM AST...ALTHOUGH SHOWER ACTIVITY ACROSS THESE 
MUNICIPALITIES HAS DIMINISHED...ANOTHER AREA OF SHOWERS OVER THE 
CARIBBEAN WATERS IS EXPECTED TO AFFECT THESE AREAS DURING THE NEXT 
HOUR OR TWO. ALSO...PEOPLE ALONG TOA VACA DAM GATES AND ALONG 
JACAGUAS RIVER...HAS BEEN EVACUATED. THEREFORE...THE FLASH FLOOD 
WARNING HAS BEEN EXTENDED UNTIL 845 PM AST.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 1793 6638 1795 6642 1792 6646 1795 6643
      1798 6645 1797 6654 1814 6656 1818 6646
      1817 6633 1808 6626 1800 6634 1793 6632
      1797 6634 1794 6637 1793 6635 1794 6637
      1791 6639

$$

CASTRO

ADDITIONAL INFORMATION CAN BE FOUND AT /USE LOWER CASE LETTERS/:
     HTTP://WWW.WEATHER.GOV/SANJUAN
319 
WGCA72 TJSJ 140042
FFSSJU

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN JUAN PR
842 PM AST TUE SEP 13 2011

PRC043-075-133-149-140051-
/O.EXP.TJSJ.FF.W.0132.000000T0000Z-110914T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COAMO PR-VILLALBA PR-JUANA DIAZ PR-SANTA ISABEL PR-
842 PM AST TUE SEP 13 2011

...THE FLASH FLOOD WARNING WILL EXPIRE AT 845 PM AST FOR SANTA
ISABEL...JUANA DIAZ...VILLALBA AND COAMO MUNICIPALITIES...

DOPPLER RADAR INDICATED THAT THE HEAVY RAIN WHICH AFFECTED THIS AREA
HAD DISSIPATED OR MOVED AWAY. NO SIGNIFICANT ADDITIONAL RAINFALL IS 
EXPECTED ACROSS THESE AREAS AT THIS TIME. ALSO...RIVERS ALONG TOA 
VACA DAM ARE BELOW FLOOD STAGE. THEREFORE...THE FLASH FLOOD WARNING 
FOR THESE AREAS WILL BE ALLOWED TO EXPIRE.

LAT...LON 1793 6638 1795 6642 1792 6646 1795 6643
      1798 6645 1797 6654 1814 6656 1818 6646
      1817 6633 1808 6626 1800 6634 1793 6632
      1797 6634 1794 6637 1793 6635 1794 6637
      1791 6639

$$

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.

IssuedProductOfficeCountiesLasted
Sep 12, 7:14 PM CDTFlash Flood WarningJSJ5 hr
Sep 12, 8:58 PM CDTAreal Flood AdvisoryJSJ93 min
Sep 12, 10:18 PM CDTFlash Flood WarningJSJ3 hr
Sep 12, 11:43 PM CDTAreal Flood AdvisoryJSJ2 hr
Sep 13, 12:11 AM CDTFlash Flood WarningJSJ9 hr
Sep 13, 2:33 AM CDTFlash Flood WarningJSJ6 hr
Sep 13, 3:39 AM CDTSpecial Marine WarningJSJ66 min
Sep 13, 3:48 AM CDTTornado WarningJSJ27 min
Sep 13, 4:25 AM CDTAreal Flood AdvisoryJSJ2 hr
Sep 13, 4:42 AM CDTSpecial Marine WarningJSJ2 hr
Sep 13, 5:35 AM CDTAreal Flood AdvisoryJSJ78 min
Sep 13, 6:24 AM CDTAreal Flood AdvisoryJSJ3 hr
Sep 13, 6:46 AM CDTFlash Flood WarningJSJ3 hr
Sep 13, 7:01 AM CDTAreal Flood AdvisoryJSJ3 hr
Sep 13, 7:13 AM CDTAreal Flood AdvisoryJSJ6 hr
Sep 13, 8:23 AM CDTFlash Flood WarningJSJ3 hr
Sep 13, 8:39 AM CDTFlash Flood WarningJSJ3 hr
Sep 13, 9:02 AM CDTAreal Flood AdvisoryJSJ3 hr
Sep 13, 9:39 AM CDTAreal Flood WarningJSJ10 hr
Sep 13, 9:48 AM CDTFlash Flood WarningJSJ3 hr
Sep 13, 10:01 AM CDTAreal Flood WarningJSJ20 hr
Sep 13, 10:06 AM CDTAreal Flood AdvisoryJSJ2 hr
Sep 13, 10:59 AM CDTAreal Flood WarningJSJ7 hr
Sep 13, 11:02 AM CDTFlash Flood WarningJSJ5 hr
Sep 13, 11:19 AM CDTAreal Flood WarningJSJ6 hr
Sep 13, 11:47 AM CDTFlash Flood WarningJSJ5 hr
Sep 13, 12:18 PM CDTAreal Flood WarningJSJ6 hr
Sep 13, 12:58 PM CDTAreal Flood WarningJSJ13 hr
Sep 13, 4:07 PM CDTAreal Flood WarningJSJ6 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.