Alert archive / Puerto Rico / Flash Flood Warnings in 2007

Flash Flood Warning 66, NWS JSJ

December 12, 2007

NWS JSJ issued this flash flood warning at Dec 12, 2007, 1:57 AM CST. It was in force for 6 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: Dec 12, 2007, 1:57 AM CST (07:57 UTC)
Expired: Dec 12, 2007, 8:00 AM CST
In force: 6 hr
Issued by: NWS JSJ
Area: Storm-based polygon
Flood severity: None

The radar

The San Juan radar (TJUA), 16 km from the middle of the area, began a volume at 07:59 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 120805
FFWSJU
PRC151-121400-
/O.NEW.TJSJ.FF.W.0066.071212T0757Z-071212T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
357 AM AST WED DEC 12 2007

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  THE FOLLOWING MUNICIPALITIES

  IN PUERTO RICO
     YABUCOA

* UNTIL 1000 AM AST

* AT 355 AM AST...A U.S.G.S. RIVER GAGE SENSOR ALONG THE RIO 
GUAYANES IN YABUCOA INDICATED THAT THE RIVER WAS SEVERAL FEET ABOVE 
FLOOD STAGE...AND VERY SLOWLY BEGINNING TO RECEDE. WHILE THIS RIVER 
SLOWLY RECEDES OVER THE NEXT SEVERAL HOURS...DANGEROUS FLOODING 
ALONG THE RIO GUAYANES AND ITS TRIBUTARIES IS EXPECTED TO CONTINUE 
THROUGH AT LEAST 1000 AM AST. THE NWS DOPPLER RADAR ALSO INDICATED 
SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS ACROSS YABUCOA.   

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

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 1810 6600 1807 6582 1804 6584 1806 6602
TIME...MOT...LOC 0757Z 180DEG 0KT 1809 6594

$$

FIGUEROA

1 follow-up statement

000 
WGCA72 TJSJ 121042
FFSSJU

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN JUAN PR
638 AM AST WED DEC 12 2007

PRC151-121048-
/O.CAN.TJSJ.FF.W.0066.000000T0000Z-071212T1400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
YABUCOA PR-
638 AM AST WED DEC 12 2007

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR YABUCOA 
MUNICIPALITY FOR PEOPLES ALONG THE RIO GUAYANES AND ITS 
TRIBUTARIES...

AT 635 AM AST...THE NWS DOPPLER WEATHER RADAR INDICATED THAT THE 
SHOWERS AND THUNDERSTORMS WITH HEAVY RAIN THAT WERE AFFECTING THE 
FORMER WARNING AREA EARLIER CONTINUE TO DIMINISH OR MOVE AWAY. 
ALTHOUGH BRIEF SHOWERS WILL LINGER ACROSS THESE AREAS DURING THE 
NEXT HOUR OR SO...NO ADDITIONAL PERSISTENT HEAVY RAINFALL OR NEW 
FLASH FLOODING IS EXPECTED. THEREFORE...THE FLASH FLOOD WARNING FOR 
PEOPLES ALONG THE RIO GUAYANES AND ITS TRIBUTARIES NEAR YABUCOA 
MUNICIPALITY WAS ALLOWED TO EXPIRE. 

LAT...LON 1810 6600 1807 6582 1804 6584 1806 6602
TIME...MOT...LOC 1038Z 180DEG 0KT 1809 6594

$$

FIGUEROA

The office that day

Everything else NWS JSJ issued on the same UTC day.

Issued	Product	Office	Lasted
Dec 11, 6:35 PM CST	Flash Flood Warning	JSJ	4 hr
Dec 11, 9:00 PM CST	Special Marine Warning	JSJ	2 hr
Dec 11, 9:21 PM CST	Flash Flood Warning	JSJ	6 hr
Dec 11, 10:27 PM CST	Flash Flood Warning	JSJ	6 hr
Dec 11, 11:45 PM CST	Marine Weather Statement	JSJ	7 hr

Nearby

Flash Flood Warnings in Puerto Rico, 2007 Every flash flood warning in 2007

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.