Alert archive / Puerto Rico / Flash Flood Warnings in 2011

Flash Flood Warning 7, NWS JSJ

May 1, 2011

NWS JSJ issued this flash flood warning at May 1, 2011, 10:41 AM 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: May 1, 2011, 10:41 AM CDT (15:41 UTC)
Expired: May 1, 2011, 1:30 PM CDT
In force: 3 hr
Issued by: NWS JSJ
Area: Storm-based polygon
Flood severity: None

The radar

The San Juan radar (TJUA), 43 km from the middle of the area, began a volume at 15:44 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.

090 
WGCA52 TJSJ 011541
FFWSJU
PRC053-089-119-011830-
/O.NEW.TJSJ.FF.W.0007.110501T1541Z-110501T1830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
1141 AM AST SUN MAY 1 2011

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  THE FOLLOWING MUNICIPALITIES

  IN PUERTO RICO
     LUQUILLO
     FAJARDO
     RIO GRANDE

* UNTIL 230 PM AST

* AT 1131 AM AST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED 
TO INDICATE PERSISTENT MODERATE TO HEAVY RAINFALL OVER THE NORTHEAST 
CORNER OF PUERTO RICO...WHICH IS LEADING TO RAPID RISES IN THE RIO 
FAJARDO...RIO ESPIRITU SANTO AND ITS TRIBUTARIES. AS A RESULT... 
EXPECT FLASH FLOODING ACROSS THESE AREAS. RAINFALL TOTALS OF 2 TO 3 
INCHES HAVE ALREADY BEEN MEASURED IN SOME AREAS AND ADDITIONAL 
RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE EXPECTED DURING THE NEXT FEW 
HOURS. MUDSLIDES ARE POSSIBLE OVER AREAS OF STEEP TERRAIN.

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.

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 1844 6589 1839 6561 1827 6562 1828 6584

$$

ER/BCS

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

1 follow-up statement

327 
WGCA72 TJSJ 011836
FFSSJU

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN JUAN PR
236 PM AST SUN MAY 1 2011

PRC053-089-119-011842-
/O.EXP.TJSJ.FF.W.0007.000000T0000Z-110501T1830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LUQUILLO PR-FAJARDO PR-RIO GRANDE PR-
236 PM AST SUN MAY 1 2011

...THE FLASH FLOOD WARNING HAS EXPIRED FOR RIO GRANDE...FAJARDO AND
LUQUILLO MUNICIPALITIES...

THE HEAVIEST RAIN HAS DISSIPATED OR MOVED OFFSHORE TO THE COASTAL 
WATERS. NEW SHOWERS ARE EXPECTED TO AFFECT THESE AREAS THIS LATER 
TODAY AND COULD RESULT IN ADDITIONAL HEAVY RAINFALL AND FLOODING. A 
FLASH FLOOD WATCH REMAINS IN EFFECT FOR THESE AREAS THROUGH TUESDAY 
MORNING.

LAT...LON 1844 6589 1839 6561 1827 6562 1828 6584

$$

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 1, 3:13 AM CDT	Flash Flood Watch	JSJ	40 hr
May 1, 7:22 AM CDT	Areal Flood Advisory	JSJ	6 hr
May 1, 8:35 AM CDT	Areal Flood Advisory	JSJ	9 hr
May 1, 9:22 AM CDT	Areal Flood Advisory	JSJ	9 hr
May 1, 11:13 AM CDT	Flash Flood Warning	JSJ	3 hr
May 1, 11:24 AM CDT	Areal Flood Advisory	JSJ	3 hr
May 1, 1:54 PM CDT	Areal Flood Advisory	JSJ	5 hr

Nearby

Flash Flood Warnings in Puerto Rico, 2011 Every 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.