Alert archive / Puerto Rico / Flash Flood Warnings in 2007

Flash Flood Warning 13, NWS JSJ

April 22, 2007

NWS JSJ issued this flash flood warning at Apr 22, 2007, 12:35 PM CDT. It took effect at Apr 22, 2007, 12:42 PM CDT. It was in force for 188 days. 2 reports 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: Apr 22, 2007, 12:35 PM CDT (17:35 UTC)
In effect from: Apr 22, 2007, 12:42 PM CDT
Expired: Oct 27, 2007, 1:00 AM CDT
In force: 188 days
Issued by: NWS JSJ
Area: Counties, with a storm outline in the text
Flood severity: None

The radar

The San Juan radar (TJUA), 18 km from the middle of the area, began a volume at 17:35 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.

What was reported inside it

Time	Report	Where	Remark
Oct 26, 11:40 PM CDT	FLASH FLOOD	2 Ese Yabucoa, PR	HIGHWAY 901 AND QUEBRADA IN CAMINO NUEVO FLOODED.
Oct 26, 11:40 PM CDT	FLASH FLOOD	Yabucoa, PR	BARRIO CALABASA FLOODED

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.

000 
WGCA52 TJSJ 221742 CCA
FFWSJU
PRC021-061-127-139-221930-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
135 PM AST SUN APR 22 2007

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS ISSUED A

* FLASH FLOOD WARNING FOR...

  IN PUERTO RICO
     BAYAMON
     TRUJILLO ALTO
     GUAYNABO
     SAN JUAN

* UNTIL 330 PM AST

* AT 130 PM AST...THE DOPPLER RADAR AS WELL AS LOCAL EMERGENCY 
MANAGERS REPORTED FLASH FLOODING FROM SHOWERS AN THUNDERSTORMS WITH 
VERY HEAVY RAINFALL OVER THE WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PARTS OF 
BARRIOS GUARAGUAO...SANTA ROSA...CAIMITO...CUPEY...AND MONACILLO. 
RIVERS AND STREAMS CONTINUE TO RAPIDLY RISE ACROSS THESE AREAS.

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.

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.

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

LAT...LON 1838 6606 1833 6602 1830 6606 1829 6616
      1832 6617

$$
RAM

1 follow-up statement

000 
WGCA52 TJSJ 270214
FFWSJU
PRC015-069-085-095-109-129-151-270600-
/O.NEW.TJSJ.FF.W.0013.071027T0206Z-071027T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
1006 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
     SAN LORENZO
     LAS PIEDRAS
     ARROYO
     PATILLAS
     MAUNABO
     HUMACAO
     YABUCOA

* UNTIL 200 AM AST

* AT 1003 PM AST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
VERY HEAVY RAINFALL CONTINUING ACROSS LARGE SECTIONS OF              
SOUTHEASTERN PUERTO RICO...WITH LARGE AREAS OF ADDITIONAL HEAVY      
RAINFALL UPSTREAM OF THE AREA.

EXCESSIVE RUNOFF FROM THIS HEAVY RAINFALL WILL CONTINUE TO CAUSE 
FLOODING OF SMALL CREEKS...STREAMS...ROADS AND ANY LOW LYING AREAS 
ACROSS SOUTHEASTERN PUERTO RICO THROUGH AT LEAST 2 AM AST. 
ADDITIONALLY...MUDSLIDES WILL BE POSSIBLE IN AREAS OF STEEP TERRAIN.

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.

LAT...LON 1814 6576 1801 6583 1797 6607 1810 6608
      1815 6597 1816 6591
TIME...MOT...LOC 0206Z 320DEG 20KT 1704 6505

$$

SR

The office that day

Everything else NWS JSJ issued on the same UTC day.

Issued	Product	Office	Lasted
Apr 21, 8:36 PM CDT	Flash Flood Warning	JSJ	188 days
Apr 22, 12:35 PM CDT	Flash Flood Warning	JSJ	187 days
Apr 22, 12:35 PM CDT	Flash Flood Warning	JSJ	187 days
Apr 22, 6:06 PM CDT	Flash Flood Warning	JSJ	187 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; local storm reports from the same archive; radar from the NEXRAD Level II archive.