Alert archive / Puerto Rico / Flash Flood Warnings in 2012

Flash Flood Warning 19, NWS JSJ

May 8, 2012

NWS JSJ issued this flash flood warning at May 8, 2012, 4:53 PM CDT. It was in force for 6 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: May 8, 2012, 4:53 PM CDT (21:53 UTC)
Expired: May 8, 2012, 10:45 PM CDT
In force: 6 hr
Issued by: NWS JSJ
Area: Storm-based polygon
Flood severity: None

The radar

The San Juan radar (TJUA), 35 km from the middle of the area, began a volume at 21:54 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.

519 
WGCA52 TJSJ 082153
FFWSJU
PRC021-051-105-135-137-090345-
/O.NEW.TJSJ.FF.W.0019.120508T2153Z-120509T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
553 PM AST TUE MAY 8 2012

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  THE FOLLOWING MUNICIPALITIES

  IN PUERTO RICO
     BAYAMON
     NARANJITO
     DORADO
     TOA ALTA
     TOA BAJA

* UNTIL 1145 PM AST

* AT 542 PM AST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
HEAVY RAIN CONTINUING UPSTREAM OF THE WARNED AREA. WATER IS RUSHING 
DOWN THE RIO DE LA PLATA RIVER WITH VERY RAPID RISES AND WATER OVER 
TOPPING THE DAMS OR BEING RELEASED TO PREVENT IT.

FOR THE RIO DE LA PLATA AT COMERIO - COMP4
     FLOOD STAGE - 11 FEET.
     AT 542 PM AST...THE USGS SENSOR INDICATED THE RIVER HAD RISEN
     TO...
     17.13 FEET.
     MODERATE FLOODING IS FORECAST.

FOR THE RIO DE LA PLATA NEAR TOA ALTA - TOAP4
     FLOOD STAGE - 16 FEET.
     AT 542 PM AST...THE USGS SENSOR INDICATED THE RIVER HAS NOT YET 
RISEN AND WAS...
     3.74 FEET.
     MODERATE FLOODING IS FORECAST.

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 1837 6626 1841 6628 1848 6627 1847 6624
      1841 6624 1836 6621 1834 6620 1829 6624

$$

SNELL

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

1 follow-up statement

399 
WGCA72 TJSJ 082349
FFSSJU

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN JUAN PR
749 PM AST TUE MAY 8 2012

PRC021-051-105-135-137-090345-
/O.CON.TJSJ.FF.W.0019.000000T0000Z-120509T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BAYAMON PR-NARANJITO PR-DORADO PR-TOA ALTA PR-TOA BAJA PR-
749 PM AST TUE MAY 8 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1145 PM AST FOR TOA
BAJA...TOA ALTA...DORADO...NARANJITO AND BAYAMON MUNICIPALITIES...


FOR THE RIO DE LA PLATA AT COMERIO - COMP4
     FLOOD STAGE - 11 FEET.
     AT 740 PM AST...THE USGS SENSOR INDICATED THE RIVER HAS         
     FALLEN TO...
     13.27 FEET.
     MODERATE FLOODING WILL END SHORTLY BUT MINOR FLOODNG WILL       
     CONTINUE.

FOR THE RIO DE LA PLATA NEAR TOA ALTA - TOAP4
     FLOOD STAGE - 16 FEET.
     AT 740 PM AST...THE USGS SENSOR INDICATED THE RIVER HAD RISEN
     TO...
     16.41 FEET.
     MODERATE FLOODING IS FORECAST.

AT 740 PM AST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE HEAVY RAINFALL OVER THE LOWER REACHES OF THE WARNED AREA.

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.

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

&&

LAT...LON 1837 6626 1841 6628 1848 6627 1847 6624
      1841 6624 1836 6621 1834 6620 1829 6624

$$

SNELL

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
May 7, 7:54 PM CDT	Areal Flood Advisory	JSJ	105 min
May 7, 7:56 PM CDT	Areal Flood Advisory	JSJ	110 min
May 8, 2:07 PM CDT	Areal Flood Advisory	JSJ	4 hr
May 8, 2:46 PM CDT	Areal Flood Advisory	JSJ	119 min
May 8, 3:14 PM CDT	Flash Flood Warning	JSJ	2 hr
May 8, 4:30 PM CDT	Flash Flood Warning	JSJ	6 hr
May 8, 4:46 PM CDT	Areal Flood Advisory	JSJ	3 hr

Nearby

Flash Flood Warnings in Puerto Rico, 2012 Every flash flood warning in 2012

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.