Alert archive / Puerto Rico / Flash Flood Warnings in 2009

Flash Flood Warning 9, NWS JSJ

May 4, 2009

NWS JSJ issued this flash flood warning at May 4, 2009, 12:06 PM CDT. It was in force for 95 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: May 4, 2009, 12:06 PM CDT (17:06 UTC)
Expired: May 4, 2009, 1:41 PM CDT
In force: 95 min
Issued by: NWS JSJ
Area: Storm-based polygon
Flood severity: None

The radar

The San Juan radar (TJUA), 34 km from the middle of the area, began a volume at 17:11 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.

000 
WGCA52 TJSJ 041706
FFWSJU
PRC021-051-061-127-135-137-143-041900-
/O.NEW.TJSJ.FF.W.0009.090504T1706Z-090504T1900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
106 PM AST MON MAY 4 2009

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  THE FOLLOWING MUNICIPALITIES

  IN PUERTO RICO
     BAYAMON
     TOA ALTA
     VEGA ALTA
     DORADO
     GUAYNABO
     SAN JUAN
     TOA BAJA

* UNTIL 300 PM AST

* AT 100 PM AST...DOPPLER WEATHER RADAR INDICATED VERY HEAVY RAIN IN 
NUMEROUS SHOWERS AND THUNDERSTORMS MOVING OVER THESE AREAS. THE 
HEAVIEST RAINFALL WAS NOW MOVING ACROSS BAYAMON...GUAYNABO AND 
DORADO. THE RIVER LEVEL SENSORS ACROSS THESE AREAS INDICATED THAT 
RIVERS AND STREAMS ARE AT HIGH LEVELS...AND ADDITIONAL RAINFALL WILL 
CAUSE RAPID RIVER RISES. AT LEAST THROUGH 300 PM AST...ADDITIONAL 
SHOWERS WILL MOVE ACROSS THESE AREAS PRODUCING ONE OR MORE INCHES OF 
PRECIPITATION.    

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 1842 6605 1833 6607 1840 6633 1847 6630

$$

JFR/EM/AAS

1 follow-up statement

000 
WGCA72 TJSJ 041841
FFSSJU

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN JUAN PR
241 PM AST MON MAY 4 2009

PRC021-051-061-127-135-137-143-041848-
/O.CAN.TJSJ.FF.W.0009.000000T0000Z-090504T1900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BAYAMON PR-TOA ALTA PR-VEGA ALTA PR-DORADO PR-GUAYNABO PR-SAN JUAN 
PR-TOA BAJA PR-
241 PM AST MON MAY 4 2009

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR TOA BAJA...SAN
JUAN...GUAYNABO...DORADO...VEGA ALTA...TOA ALTA AND BAYAMON
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 DURING THE NEXT SEVERAL HOURS AND FOR 
THAT REASON THE FLASH FLOOD WARNING HAS BEEN CANCELLED.

LAT...LON 1842 6605 1833 6607 1840 6633 1847 6630

$$

FIGUEROA

The office that day

Everything else NWS JSJ issued on the same UTC day.

Issued	Product	Office	Lasted
May 4, 10:43 AM CDT	Areal Flood Advisory	JSJ	6 hr
May 4, 11:30 AM CDT	Areal Flood Advisory	JSJ	3 hr
May 4, 12:47 PM CDT	Areal Flood Advisory	JSJ	3 hr
May 4, 1:06 PM CDT	Marine Weather Statement	JSJ	3 hr
May 4, 1:56 PM CDT	Areal Flood Warning	JSJ	5 hr
May 4, 2:19 PM CDT	Areal Flood Advisory	JSJ	105 min
May 4, 3:17 PM CDT	Areal Flood Advisory	JSJ	60 min

Nearby

Flash Flood Warnings in Puerto Rico, 2009 Every flash flood warning in 2009

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.