Alert archive / Puerto Rico / Flash Flood Warnings in 2012

Flash Flood Warning 42, NWS JSJ

November 11, 2012

NWS JSJ issued this flash flood warning at Nov 11, 2012, 4:24 AM CST. It was in force for 2 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: Nov 11, 2012, 4:24 AM CST (10:24 UTC)
Expired: Nov 11, 2012, 6:27 AM CST
In force: 2 hr
Issued by: NWS JSJ
Area: Storm-based polygon
Flood severity: None

The radar

The San Juan radar (TJUA), 39 km from the middle of the area, began a volume at 10:23 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.

013 
WGCA52 TJSJ 111024
FFWSJU
PRC103-111315-
/O.NEW.TJSJ.FF.W.0042.121111T1024Z-121111T1315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
624 AM AST SUN NOV 11 2012

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  THE FOLLOWING MUNICIPALITY

  IN PUERTO RICO
     NAGUABO

* UNTIL 915 AM AST

* AT 617 AM AST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
SHOWERS AND ISOLATED THUNDERSTORMS...SOME WITH VERY HEAVY RAIN 
AFFECTING THESE MUNICIPALITIES. RADAR ESTIMATES AND U.S.G.S. RAIN 
GAGES INDICATE THAT 2 TO 3 INCHES OF RAIN HAVE ALREADY FALLEN OVER 
PARTS OF THE WARNING AREA AND IT CONTINUED TO RAIN...WHICH IS 
LEADING TO RAPID RISES OF THE RIO BLANCO RIVER AND ITS TRIBUTARIES. 
ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE EXPECTED THROUGH 
915 AM AST. DO NOT ATTEMPT TO CROSS ANY FLOODED AREAS BY CAR OR 
FOOT. MUDSLIDES ARE POSSIBLE OVER AREAS OF STEEP TERRAIN.

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 1825 6571 1820 6566 1817 6569 1817 6571
      1823 6582 1829 6580

$$

EM

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

1 follow-up statement

168 
WGCA72 TJSJ 111227
FFSSJU

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN JUAN PR
827 AM AST SUN NOV 11 2012

PRC103-111232-
/O.CAN.TJSJ.FF.W.0042.000000T0000Z-121111T1315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NAGUABO PR-
827 AM AST SUN NOV 11 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR NAGUABO
MUNICIPALITY...

SHOWERS THAT AFFECTED THIS AREA DISSIPATED AND NO SIGNIFICANT 
ADDITIONAL SHOWERS ARE EXPECTED FOR THE NEXT FEW HOURS. IN 
ADDITION...U.S.G.S. RIVER SENSORS INDICATE THAT THE RIO BLANCO IS 
BELOW FLOOD STAGE AND CONTINUES TO RECEDE. THEREFORE THE FLASH FLOOD 
WARNING WAS CANCELED.

LAT...LON 1825 6571 1820 6566 1817 6569 1817 6571
      1823 6582 1829 6580

$$

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
Nov 10, 8:34 PM CST	Small Craft Advisory	JSJ	52 hr
Nov 11, 3:53 AM CST	Areal Flood Advisory	JSJ	3 hr
Nov 11, 8:42 AM CST	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.