Alert archive / Puerto Rico / Flash Flood Warnings in 2011

Flash Flood Warning 81, NWS JSJ

July 16, 2011

NWS JSJ issued this flash flood warning at Jul 16, 2011, 1:31 PM CDT. It was in force for 119 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 16, 2011, 1:31 PM CDT (18:31 UTC)
Expired: Jul 16, 2011, 3:30 PM CDT
In force: 119 min
Issued by: NWS JSJ
Area: Storm-based polygon
Flood severity: None

The radar

The San Juan radar (TJUA), 32 km from the middle of the area, began a volume at 18:31 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.

020 
WGCA52 TJSJ 161831
FFWSJU
PRC127-139-162030-
/O.NEW.TJSJ.FF.W.0081.110716T1831Z-110716T2030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
231 PM AST SAT JUL 16 2011

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  THE FOLLOWING MUNICIPALITIES

  IN PUERTO RICO
     TRUJILLO ALTO
     SAN JUAN

* UNTIL 430 PM AST

* AT 219 PM AST...DOPPLER RADAR INDICATED SHOWERS AND THUNDERSTORMS 
RE-DEVELOPING AND MOVING OVER THE WARNED AREA. THESE AREAS OF 
SHOWERS AND THUNDERSTORMS HAVE THE CAPABILITY OF PRODUCING MODERATE 
TO HEAVY RAINFALL WHICH WILL LEAD TO RAPID RISES ON RIVERS...STREAMS 
AND CREEKS THROUGH AT LEAST THOUGH 430 PM AST. THE RIO PIEDRAS RIVER 
HAS ALREADY OVERFLOWED ITS BANKS FROM RUNOFF FROM AN INTENSE 
THUNDERSTORM EARLIER THIS AFTERNOON AND CONTINUES TO RISE.

FOR THE RIO PIEDRAS NEAR HATO REY- RPOP4
     FLOOD STAGE - 15 FEET.
     AT 219 PM AST THE USGS SENSOR INDICATED THE RIVER HAD RISEN     
     TO 16.80 FEET. MODERATE FLOODING IS FORECAST.

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 1847 6612 1848 6607 1832 6594 1829 6605

$$

AAS

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 16, 12:38 PM CDT	Areal Flood Advisory	JSJ	3 hr
Jul 16, 1:34 PM CDT	Flash Flood Warning	JSJ	3 hr
Jul 16, 1:47 PM CDT	Areal Flood Advisory	JSJ	2 hr
Jul 16, 5:38 PM CDT	Areal Flood Advisory	JSJ	2 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.