Alert archive / Puerto Rico / Flash Flood Warnings in 2011

Flash Flood Warning 84, NWS JSJ

July 23, 2011

NWS JSJ issued this flash flood warning at Jul 23, 2011, 5:37 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: Jul 23, 2011, 5:37 PM CDT (22:37 UTC)
Expired: Jul 23, 2011, 8:30 PM CDT
In force: 3 hr
Issued by: NWS JSJ
Area: Storm-based polygon
Flood severity: None

The radar

The San Juan radar (TJUA), 14 km from the middle of the area, began a volume at 22:39 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.

348 
WGCA52 TJSJ 232237
FFWSJU
PRC025-063-077-085-129-240130-
/O.NEW.TJSJ.FF.W.0084.110723T2237Z-110724T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
637 PM AST SAT JUL 23 2011

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  THE FOLLOWING MUNICIPALITIES

  IN PUERTO RICO
     CAGUAS
     GURABO
     JUNCOS
     LAS PIEDRAS
     SAN LORENZO

* UNTIL 930 PM AST

* AT 630 PM AST...USGS RIVER SENSORS INDICATED THAT THE RIO CAYAGUAS 
AND RIO GRANDE DE LOIZA IN SAN LORENZO WERE RISING RAPIDLY AND 
APPROACHING ITS FLOOD STAGE. ALSO...EXPECT FLOODING ALONG ITS 
TRIBUTARIES AND ON ROADWAYS.

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 1828 6606 1830 6602 1825 6590 1810 6594
      1812 6606

$$

JJA

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

1 follow-up statement

743 
WGCA72 TJSJ 240122
FFSSJU

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN JUAN PR
922 PM AST SAT JUL 23 2011

PRC025-063-077-085-129-240131-
/O.EXP.TJSJ.FF.W.0084.000000T0000Z-110724T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CAGUAS PR-GURABO PR-JUNCOS PR-LAS PIEDRAS PR-SAN LORENZO PR-
922 PM AST SAT JUL 23 2011

...THE FLASH FLOOD WARNING WILL EXPIRE AT 930 PM AST FOR SAN
LORENZO...LAS PIEDRAS...JUNCOS...GURABO AND CAGUAS MUNICIPALITIES...

DOPPLER RADAR INDICATED THAT THE HEAVY RAIN WHICH AFFECTED THIS AREA
HAD DISSIPATED OR MOVED AWAY. NO SIGNIFICANT ADDITIONAL RAINFALL IS 
EXPECTED ACROSS THESE AREAS AT THIS TIME. ALSO...THE USGS RIVER 
SENSORS INDICATE THAT THE RIVERS IN THE AREA ARE BELOW FLOOD STAGE 
AND CONTINUE TO SLOWLY RECEDE.

LAT...LON 1828 6606 1830 6602 1825 6590 1811 6593
      1812 6606

$$

JJA

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
Jul 23, 2:23 AM CDT	Areal Flood Advisory	JSJ	4 hr
Jul 23, 3:59 AM CDT	Special Marine Warning	JSJ	31 min
Jul 23, 7:04 AM CDT	Flash Flood Watch	JSJ	29 hr
Jul 23, 11:28 AM CDT	Areal Flood Advisory	JSJ	107 min
Jul 23, 11:32 AM CDT	Areal Flood Advisory	JSJ	102 min
Jul 23, 12:48 PM CDT	Areal Flood Advisory	JSJ	3 hr
Jul 23, 1:32 PM CDT	Special Marine Warning	JSJ	58 min
Jul 23, 2:51 PM CDT	Special Marine Warning	JSJ	39 min
Jul 23, 3:10 PM CDT	Special Marine Warning	JSJ	50 min
Jul 23, 3:38 PM CDT	Areal Flood Advisory	JSJ	112 min
Jul 23, 4:29 PM CDT	Areal Flood Advisory	JSJ	2 hr
Jul 23, 5:04 PM CDT	Flash Flood Warning	JSJ	116 min

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.