Alert archive / Puerto Rico / Flash Flood Warnings in 2007

Flash Flood Warning 9, NWS JSJ

April 21, 2007

NWS JSJ issued this flash flood warning at Apr 21, 2007, 12:15 AM CDT. It was in force for 189 days. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 21, 2007, 12:15 AM CDT (05:15 UTC)
Expired: Oct 26, 2007, 10:30 PM CDT
In force: 189 days
Issued by: NWS JSJ
Area: Counties, with a storm outline in the text
Flood severity: None

The radar

The San Juan radar (TJUA), 17 km from the middle of the area, began a volume at 05:16 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.

000 
WGCA52 TJSJ 210519
FFWSJU
PRC009-015-035-057-109-123-133-210715-

HERE 115 AM AST THERE

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
115 AM AST SAT APR 21 2007

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS ISSUED A

* FLASH FLOOD WARNING FOR...

  IN PUERTO RICO
     CAYEY
     AIBONITO
     ARROYO
     PATILLAS
     GUAYAMA
     SALINAS
     SANTA ISABEL

* UNTIL 315 AM AST

* AT 1:10 AM AST...NATIONAL WEATHER SERVICE DOPPLER RADAR            
  INDICATED PERIODS OF HEAVY RAIN CONTINUING TO MOVE NORTHEASTWARD   
  ACROSS THIS WARNING AREA. ADDITIONAL RAINFALL WILL OCCUR ACROSS    
  THIS AREA THROUGH 3 AM AND COULD CAUSE FURTHER FLOODING PROBLEMS.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL 
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...ROADS 
AND LANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW LYING 
AREAS ARE SUBJECT TO FLOODING. LANDSLIDES ARE ALSO A POSSIBLE ACROSS 
AREAS OF STEEP TERRAIN.

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 6631 1793 6605 1802 6604 1810 6622
      1796 6641

$$

SS

1 follow-up statement

000 
WGCA52 TJSJ 262329
FFWSJU
PRC009-019-025-035-041-043-057-123-270330-
/O.NEW.TJSJ.FF.W.0009.071026T2323Z-071027T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
723 PM AST FRI OCT 26 2007

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  THE FOLLOWING MUNICIPALITIES

  IN PUERTO RICO
     CAGUAS
     CIDRA
     COAMO
     CAYEY
     AIBONITO
     BARRANQUITAS
     GUAYAMA
     SALINAS

* UNTIL 1130 PM AST

* AT 719 PM AST...LOCAL LAW ENFORCEMENT OFFICIALS TWO HIGHWAYS HAVE  
BEEN CLOSED. HIGHWAY 171 FROM CIDRA TO CAYEY WAS CLOSED DUE TO 
RISING WATER FROM A TRIBUTARY OF THE RIO DE LA PLATA. AND HIGHWAY 
742 WAS CLOSED DUE TO A MUDSLIDE AT KILOMETER 1.3. THE STORMS IN 
THIS BAND OF RAIN ARE MOVING WEST AT 25 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  GUAYAMA...OLIMPO...JOBOS...CAYEY...COQUI...VAZQUEZ...COCO...       
  AIBONITO...SALINAS AND BARRANQUITAS.

AS HEAVIER RAINS MOVE INTO THESE AREAS THE DANGER OF MUDSLIDES WILL 
INCREASE EXPONENTIALLY. PERSONS SHOULD AVOID DRIVING IF AT ALL 
POSSIBLE. MANY RIVERS WILL RISE RAPIDLY AS THIS EVENT UNFOLDS THIS 
EVENING. CONSIDERABLE RAIN HAS ALREADY FALLEN EAST OF THE AREA FROM 
YABUCOA TO PATILLAS AND ARROYO.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...ROADS
AND LANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW LYING
AREAS ARE SUBJECT TO FLOODING.

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 1819 6635 1816 6609 1795 6608 1797 6633
TIME...MOT...LOC 2323Z 099DEG 25KT 1805 6600

$$

SNELL

The office that day

Everything else NWS JSJ issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 21, 12:15 AM CDT	Flash Flood Warning	JSJ		189 days

Nearby

Flash Flood Warnings in Puerto Rico, 2007 Every flash flood warning in 2007

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.