Alert archive / Puerto Rico / Flash Flood Warnings in 2014

Flash Flood Warning 23, NWS JSJ

October 31, 2014

NWS JSJ issued this flash flood warning at Oct 31, 2014, 12:22 PM CDT. It was in force for 3 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: Oct 31, 2014, 12:22 PM CDT (17:22 UTC)
Expired: Oct 31, 2014, 3:15 PM CDT
In force: 3 hr
Issued by: NWS JSJ
Area: Storm-based polygon
Flood severity: None

The radar

The San Juan radar (TJUA), 33 km from the middle of the area, began a volume at 17:21 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.

258 
WGCA52 TJSJ 311722
FFWSJU
PRC021-033-051-061-127-135-137-139-312015-
/O.NEW.TJSJ.FF.W.0023.141031T1722Z-141031T2015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
122 PM AST FRI OCT 31 2014

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  THE FOLLOWING MUNICIPALITIES

  IN PUERTO RICO
     BAYAMON
     GUAYNABO
     SAN JUAN
     TRUJILLO ALTO
     DORADO
     TOA ALTA
     CATANO
     TOA BAJA

* UNTIL 415 PM AST

* AT 116 PM AST...DOPPLER RADAR INDICATED MODERATE TO HEAVY RAINFALL 
CONTINUES OVER THE WARNED AREA. RAINFALL AMOUNTS OF 1 TO 2 INCHES 
HAS FALLEN OVER THESE MUNICIPALITIES IN THE LAST HOUR. ADDITIONAL 
RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE EXPECTED WITH THE HEAVIEST 
RAINFALL. 

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.

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 1842 6602 1835 6604 1829 6620 1833 6622
      1832 6623 1837 6629 1847 6626 1847 6617
      1846 6617 1847 6615 1847 6608

$$

FC

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

2 follow-up statements

888 
WGCA72 TJSJ 311831
FFSSJU

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN JUAN PR
231 PM AST FRI OCT 31 2014

PRC021-033-051-061-127-135-137-139-312015-
/O.CON.TJSJ.FF.W.0023.000000T0000Z-141031T2015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BAYAMON PR-GUAYNABO PR-SAN JUAN PR-TRUJILLO ALTO PR-DORADO PR-
TOA ALTA PR-CATANO PR-TOA BAJA PR-
231 PM AST FRI OCT 31 2014

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 415 PM AST FOR TOA
BAJA...CATANO...TOA ALTA...DORADO...TRUJILLO ALTO...SAN JUAN...
GUAYNABO AND BAYAMON MUNICIPALITIES...

AT 217 PM AST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THAT THE RAINFALL OVER THE WARNED AREA HAVE DIMINISHED IN THE LAST 
30 MINUTES. ALTHOUGH...NO RAIN IS OCCURRING AT THIS TIME OVER THESE 
MUNICIPALITIES...EXCESSIVE RUNOFF FROM PREVIOUS HEAVY RAINFALL 
CONTINUE TO CAUSE FLOODING IN SEVERAL AREAS INSIDE OF THE WARNED 
AREA. 

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. 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.

&&

LAT...LON 1842 6602 1835 6604 1829 6620 1833 6622
      1832 6623 1837 6629 1847 6626 1847 6617
      1846 6617 1847 6615 1847 6608

$$

ER/RGH

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

591 
WGCA72 TJSJ 312009
FFSSJU

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN JUAN PR
409 PM AST FRI OCT 31 2014

PRC021-033-051-061-127-135-137-139-312019-
/O.EXP.TJSJ.FF.W.0023.000000T0000Z-141031T2015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BAYAMON PR-GUAYNABO PR-SAN JUAN PR-TRUJILLO ALTO PR-DORADO PR-
TOA ALTA PR-CATANO PR-TOA BAJA PR-
409 PM AST FRI OCT 31 2014

...THE FLASH FLOOD WARNING WILL EXPIRE AT 415 PM AST FOR TOA BAJA...
CATANO...TOA ALTA...DORADO...TRUJILLO ALTO...SAN JUAN...GUAYNABO AND
BAYAMON MUNICIPALITIES...

DOPPLER RADAR INDICATED THAT THE HEAVY RAIN WHICH AFFECTED THIS AREA 
HAD DISSIPATED. NO SIGNIFICANT ADDITIONAL RAINFALL IS EXPECTED 
ACROSS THESE AREAS AT THIS TIME.

HOWEVER...RESIDENTS AND MOTORISTS ACROSS THESE AREAS SHOULD BE ALERT 
TO PONDING OF WATER ON ROADWAYS AND ALLOW TIME FOR STREAMS...CREEKS 
AND RIVERS TO RETURN TO NORMAL LEVELS.

LAT...LON 1842 6602 1835 6604 1829 6620 1833 6622
      1832 6623 1837 6629 1847 6626 1847 6617
      1846 6617 1847 6615 1847 6608

$$

ER

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
Oct 31, 11:03 AM CDT	Areal Flood Advisory	JSJ	3 hr
Oct 31, 12:05 PM CDT	Areal Flood Advisory	JSJ	3 hr
Oct 31, 12:31 PM CDT	Areal Flood Advisory	JSJ	4 hr
Oct 31, 12:33 PM CDT	Areal Flood Advisory	JSJ	4 hr

Nearby

Flash Flood Warnings in Puerto Rico, 2014 Every flash flood warning in 2014

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.