Alert archive / Puerto Rico / Flash Flood Warnings in 2012

Flash Flood Warning 25, NWS JSJ

May 18, 2012

NWS JSJ issued this flash flood warning at May 18, 2012, 2:57 PM CDT. It was in force for 3 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: May 18, 2012, 2:57 PM CDT (19:57 UTC)
Expired: May 18, 2012, 5:47 PM CDT
In force: 3 hr
Issued by: NWS JSJ
Area: Storm-based polygon
Flood severity: None

The radar

The San Juan radar (TJUA), 31 km from the middle of the area, began a volume at 19:59 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.

933 
WGCA52 TJSJ 181957
FFWSJU
PRC021-061-182300-
/O.NEW.TJSJ.FF.W.0025.120518T1957Z-120518T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
357 PM AST FRI MAY 18 2012

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  THE FOLLOWING MUNICIPALITIES

  IN PUERTO RICO
     BAYAMON
     GUAYNABO

* UNTIL 700 PM AST

* AT 347 PM AST...DOPPLER WEATHER RADAR INDICATED VERY HEAVY 
RAINFALL OVER THE WARNED AREA. PERSISTENT SHOWERS AND THUNDERSTORMS 
HAVE BEEN AFFECTING THESE BAYAMON AND GUAYNABO. RAINFALL AMOUNTS OF 
3 TO 5 INCHES HAVE FALLEN IN THE WARNED AREA IN THE LAST HOUR AND 
ADDITIONAL 2 TO 3 INCHES ARE POSSIBLE THROUGH 7 PM AST.

PEOPLE SHOULD BE ALERT FOR RAPID RISES ON NEARBY TRIBUTARIES. 


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 6610 1836 6612 1829 6610 1828 6621
      1842 6620 1842 6618 1843 6617 1842 6613
      1844 6611

$$

ER

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

3 follow-up statements

204 
WGCA52 TJSJ 182019 CCA
FFWSJU
PRC021-061-182300-
/O.COR.TJSJ.FF.W.0025.120518T2015Z-120518T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING...CORRECTED
NATIONAL WEATHER SERVICE SAN JUAN PR
415 PM AST FRI MAY 18 2012

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  THE FOLLOWING MUNICIPALITIES

  IN PUERTO RICO
     BAYAMON
     GUAYNABO

* UNTIL 700 PM AST

* AT 347 PM AST...DOPPLER WEATHER RADAR INDICATED VERY HEAVY
  RAINFALL OVER THE WARNED AREA. PERSISTENT SHOWERS AND THUNDERSTORMS
  HAVE BEEN AFFECTING BAYAMON AND GUAYNABO. RAINFALL AMOUNTS OF 3
  TO 5 INCHES HAVE FALLEN IN THE WARNED AREA IN THE LAST HOUR AND
  ADDITIONAL 2 TO 3 INCHES ARE POSSIBLE THROUGH 7 PM AST.

PEOPLE SHOULD BE ALERT FOR RAPID RISES ALONG RIVERS AND NEARBY
TRIBUTARIES.

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. WHEN ENCOUNTERING FLOODED ROADS MAKE THE SMART CHOICE...
TURN AROUND...DONT DROWN. MOVE TO HIGHER GROUND.

&&

LAT...LON 1842 6610 1836 6612 1829 6610 1828 6621
      1842 6620 1842 6618 1843 6617 1842 6613
      1844 6611

$$

ER

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

642 
WGCA72 TJSJ 182241
FFSSJU

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN JUAN PR
641 PM AST FRI MAY 18 2012

PRC021-061-182250-
/O.CAN.TJSJ.FF.W.0025.000000T0000Z-120518T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BAYAMON PR-GUAYNABO PR-
641 PM AST FRI MAY 18 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR GUAYNABO AND
BAYAMON MUNICIPALITIES...

THE SHOWERS THAT AFFECTED THIS AREA HAVE WEAKENED AND MOVED AWAY. NO 
ADDITIONAL SIGNIFICANT SHOWERS ARE EXPECTED IN THE NEXT FEW HOURS. 
THEREFORE...THE FLASH FLOOD WARNING FOR SAN JUAN AND BAYAMON WAS 
ALLOWED TO EXPIRE AT 700 PM AST.


LAT...LON 1842 6610 1836 6612 1829 6610 1828 6621
      1842 6620 1842 6618 1843 6617 1842 6613
      1844 6611

$$

FIGUEROA

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

577 
WGCA72 TJSJ 182247 CCA
FFSSJU

FLASH FLOOD STATEMENT...CORRECTED
NATIONAL WEATHER SERVICE SAN JUAN PR
646 PM AST FRI MAY 18 2012

PRC021-061-190000-
/O.CAN.TJSJ.FF.W.0025.000000T0000Z-120518T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BAYAMON PR-GUAYNABO PR-
646 PM AST FRI MAY 18 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR GUAYNABO AND
BAYAMON MUNICIPALITIES...

THE SHOWERS THAT AFFECTED THIS AREA HAVE WEAKENED AND MOVED AWAY. NO 
ADDITIONAL SIGNIFICANT SHOWERS ARE EXPECTED IN THE NEXT FEW HOURS. 
THEREFORE...THE FLASH FLOOD WARNING FOR GUAYNABO AND BAYAMON WAS
ALLOWED TO EXPIRE AT 700 PM AST.


LAT...LON 1842 6610 1836 6612 1829 6610 1828 6621
      1842 6620 1842 6618 1843 6617 1842 6613
      1844 6611

$$

FIGUEROA

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 17, 7:46 PM CDT	Flash Flood Warning	JSJ	106 min
May 17, 9:15 PM CDT	Areal Flood Advisory	JSJ	2 hr
May 17, 9:26 PM CDT	Areal Flood Advisory	JSJ	2 hr
May 18, 12:13 PM CDT	Areal Flood Advisory	JSJ	7 hr
May 18, 12:24 PM CDT	Areal Flood Advisory	JSJ	4 hr
May 18, 2:00 PM CDT	Areal Flood Advisory	JSJ	5 hr
May 18, 2:29 PM CDT	Flash Flood Warning	JSJ	3 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; radar from the NEXRAD Level II archive.