Alert archive / Puerto Rico / Flash Flood Warnings in 2011

Flash Flood Warning 76, NWS JSJ

July 13, 2011

NWS JSJ issued this flash flood warning at Jul 13, 2011, 2:16 PM CDT. It was in force for 89 min. 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 13, 2011, 2:16 PM CDT (19:16 UTC)
Expired: Jul 13, 2011, 3:45 PM CDT
In force: 89 min
Issued by: NWS JSJ
Area: Storm-based polygon
Flood severity: None

The radar

The San Juan radar (TJUA), 98 km from the middle of the area, began a volume at 19:18 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.

246 
WGCA52 TJSJ 131916
FFWSJU
PRC131-132045-
/O.NEW.TJSJ.FF.W.0076.110713T1916Z-110713T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
316 PM AST WED JUL 13 2011

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  THE FOLLOWING MUNICIPALITY

  IN PUERTO RICO
     SAN SEBASTIAN

* UNTIL 445 PM AST

* AT 306 PM AST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
SERIES OF STRONG THUNDERSTORMS WITH VERY HEAVY RAIN...GUSTY WINDS UP 
TO 30 MPH AND RAIN RATES OF 2 TO 3 INCHES PER HOUR. THESE STRONG 
THUNDERSTORMS WILL CONTINUE TO PRODUCE VERY HEAVY RAINFALL OVER SAN 
SEBASTIAN DURING THE NEXT HOUR OR TWO. ADDITIONAL RAINFALL OF 2 TO 3 
INCHES ARE POSSIBLE ACROSS SECTIONS OF SAN SEBASTIAN.

DO NOT UNDERESTIMATE THE POWER OF FLOOD WATERS. ONLY A FEW INCHES OF
RAPIDLY FLOWING WATER CAN QUICKLY CARRY AWAY YOUR VEHICLE.

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.

IN MOUNTAINOUS OR HILLY TERRAIN...THERE ARE HUNDREDS OF LOW WATER
CROSSINGS WHICH ARE POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT
ATTEMPT TO TRAVEL ACROSS FLOODED ROADS. FIND ALTERNATE ROUTES. IT
ONLY TAKES A FEW INCHES OF SWIFTLY FLOWING WATER TO CARRY VEHICLES
AWAY.

&&

LAT...LON 1838 6702 1836 6691 1828 6692 1830 6703

$$

ER

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

1 follow-up statement

876 
WGCA72 TJSJ 132040
FFSSJU

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN JUAN PR
440 PM AST WED JUL 13 2011

PRC131-132050-
/O.EXP.TJSJ.FF.W.0076.000000T0000Z-110713T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN SEBASTIAN PR-
440 PM AST WED JUL 13 2011

...THE FLASH FLOOD WARNING WILL EXPIRE AT 445 PM AST FOR SAN
SEBASTIAN MUNICIPALITY...

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.

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

LAT...LON 1838 6702 1836 6691 1828 6692 1830 6703

$$

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	Counties	Lasted
Jul 13, 1:08 PM CDT	Areal Flood Advisory	JSJ		3 hr
Jul 13, 1:49 PM CDT	Areal Flood Advisory	JSJ		3 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.