Alert archive / Puerto Rico / Flash Flood Warnings in 2012

Flash Flood Warning 18, NWS JSJ

May 8, 2012

NWS JSJ issued this flash flood warning at May 8, 2012, 4:30 PM CDT. It was in force for 6 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 8, 2012, 4:30 PM CDT (21:30 UTC)
Expired: May 8, 2012, 10:02 PM CDT
In force: 6 hr
Issued by: NWS JSJ
Area: Storm-based polygon
Flood severity: None

The radar

The San Juan radar (TJUA), 20 km from the middle of the area, began a volume at 21:30 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.

What was reported inside it

Time	Report	Where	Remark
May 8, 5:00 PM CDT	FLASH FLOOD	Comerio, PR	RIO DE LA PLATA IN COMERIO FLOODED TWO BRIDGES. ONE IN ROAD 156 BARRIO HIGUERO SEVERAL FAMILIES UNCOMMUNICATED. THE OTHER IN THE INTERSECTION OF ROADS 156 AND 776 IN BARRIO RIO HONDO. NO CASUALTIES.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The text

As transmitted, in the capitals the NWS used until 2016.

148 
WGCA52 TJSJ 082130
FFWSJU
PRC007-045-105-090030-
/O.NEW.TJSJ.FF.W.0018.120508T2130Z-120509T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
530 PM AST TUE MAY 8 2012

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  THE FOLLOWING MUNICIPALITIES

  IN PUERTO RICO
     COMERIO
     NARANJITO
     AGUAS BUENAS

* UNTIL 830 PM AST

* AT 515 PM AST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
VERY HEAVY RAINFALL OVER THE WARNED AREA. THIS HAS RESULTED IN 
SIGNIFICANT RISES ON RIO LA PLATA AND ALL ITS TRIBUTARIES IN 
COROZAL. RESIDENTS IN FLOOD PRONE AREAS SHOULD MOVE TO HIGHER GROUND 
IMMEDIATELY AND NEVER TRY TO CROSS A FLOODED ROADWAY.

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.

&&

LAT...LON 1828 6614 1819 6621 1819 6625 1828 6624
      1828 6620 1826 6619 1828 6618

$$

ER

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

3 follow-up statements

759 
WGCA52 TJSJ 082133 CCA
FFWSJU
PRC007-045-105-090030-
/O.COR.TJSJ.FF.W.0018.120508T2132Z-120509T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING...CORRECTED
NATIONAL WEATHER SERVICE SAN JUAN PR
532 PM AST TUE MAY 8 2012

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  THE FOLLOWING MUNICIPALITIES

  IN PUERTO RICO
     COMERIO
     NARANJITO
     AGUAS BUENAS

* UNTIL 830 PM AST

* AT 515 PM AST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
VERY HEAVY RAINFALL OVER THE WARNED AREA. THIS HAS RESULTED IN 
SIGNIFICANT RISES ON RIO LA PLATA AND ALL ITS TRIBUTARIES IN 
COMERIO. RESIDENTS IN FLOOD PRONE AREAS SHOULD MOVE TO HIGHER GROUND 
IMMEDIATELY AND NEVER TRY TO CROSS A FLOODED ROADWAY.

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.

&&

LAT...LON 1828 6614 1819 6621 1819 6625 1828 6624
      1828 6620 1826 6619 1828 6618

$$

ER

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

638 
WGCA52 TJSJ 090024
FFWSJU
PRC007-045-105-090330-
/O.EXT.TJSJ.FF.W.0018.000000T0000Z-120509T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
824 PM AST TUE MAY 8 2012

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  THE FOLLOWING MUNICIPALITIES

  IN PUERTO RICO
     COMERIO
     NARANJITO
     AGUAS BUENAS

* UNTIL 1130 PM AST

* AT 815 PM AST...THE USGS RIVER SENSOR AT COMERIO SUGGESTED THAT 
THE RIO DE LA PLATA CRESTED AROUND 6:00 PM AST...BUT STILL REMAINS 
ABOVE FLOOD STAGE. FOR THAT REASON THE FLASH FLOOD WARNING FOR RIO 
DE LA PLATA AND ITS TRIBUTARIES HAS EXTENDED UNTIL 1130 PM AST.

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.

&&

LAT...LON 1828 6614 1819 6621 1819 6625 1828 6624
      1828 6620 1826 6619 1828 6618

$$

ER

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

682 
WGCA72 TJSJ 090302
FFSSJU

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN JUAN PR
1102 PM AST TUE MAY 8 2012

PRC007-045-105-090306-
/O.CAN.TJSJ.FF.W.0018.000000T0000Z-120509T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COMERIO PR-NARANJITO PR-AGUAS BUENAS PR-
1102 PM AST TUE MAY 8 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR AGUAS BUENAS...
NARANJITO AND COMERIO MUNICIPALITIES...

DOPPLER RADAR INDICATED THAT THE HEAVY RAIN WHICH AFFECTED THIS AREA 
HAD DISSIPATED. NO SIGNIFICANT HEAVY RAINFALL IS EXPECTED ACROSS 
THESE AREAS AT THIS TIME. 

ALTHOUGH...THE LEVELS OF RIO DE LA PLATA NEAR COMERIO ARE RUNNING 
HIGH...THE THREAT OF FLASH FLOODING HAVE FINISHED. THEREFORE...THE 
FLASH FLOOD WARNING HAS BEEN CANCELLED. 

LAT...LON 1828 6614 1819 6621 1819 6625 1828 6624
      1828 6620 1826 6619 1828 6618

$$

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	Lasted
May 7, 7:54 PM CDT	Areal Flood Advisory	JSJ	105 min
May 7, 7:56 PM CDT	Areal Flood Advisory	JSJ	110 min
May 8, 2:07 PM CDT	Areal Flood Advisory	JSJ	4 hr
May 8, 2:46 PM CDT	Areal Flood Advisory	JSJ	119 min
May 8, 3:14 PM CDT	Flash Flood Warning	JSJ	2 hr
May 8, 4:46 PM CDT	Areal Flood Advisory	JSJ	3 hr
May 8, 4:53 PM CDT	Flash Flood Warning	JSJ	6 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; local storm reports from the same archive; radar from the NEXRAD Level II archive.