Alert archive / Puerto Rico / Flash Flood Warnings in 2016

Flash Flood Warning 3, NWS JSJ

April 25, 2016

NWS JSJ issued this flash flood warning at Apr 25, 2016, 2:04 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: Apr 25, 2016, 2:04 PM CDT (19:04 UTC)
Expired: Apr 25, 2016, 5:00 PM CDT
In force: 3 hr
Issued by: NWS JSJ
Area: Storm-based polygon
Flood severity: None

The radar

The San Juan radar (TJUA), 19 km from the middle of the area, began a volume at 19:04 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.

121 
WGCA52 TJSJ 251904
FFWSJU
PRC025-063-127-139-252200-
/O.NEW.TJSJ.FF.W.0003.160425T1904Z-160425T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
304 PM AST MON APR 25 2016

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SAN JUAN MUNICIPALITY IN PUERTO RICO...
  CAGUAS MUNICIPALITY IN PUERTO RICO...
  TRUJILLO ALTO MUNICIPALITY IN PUERTO RICO...
  GURABO MUNICIPALITY IN PUERTO RICO...

* UNTIL 600 PM AST
    
* AT 302 PM AST...DOPPLER RADAR INDICATED THUNDERSTORMS A PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. UP TO TWO INCHES OF RAIN HAVE
  ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.
  EXCESSIVE RAINFALL OVER THE WARNED AREA WILL CAUSE MUD SLIDES NEAR
  STEEP TERRAIN. THE MUD SLIDE CAN CONSIST OF ROCK...MUD...VEGETATION
  AND OTHER LOOSE MATERIALS.

ADDITIONAL RAINFALL AMOUNTS OF ONE TO TWO INCHES ARE POSSIBLE IN THE
WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

DO NOT ENTER OR CROSS FLOWING WATER OR WATER OF UNKNOWN DEPTH. 

&&

LAT...LON 1831 6601 1823 6597 1824 6600 1823 6605
      1831 6605

$$

SNELL

2 follow-up statements

138 
WGCA72 TJSJ 251907
FFSSJU

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN JUAN PR
307 PM AST MON APR 25 2016

PRC025-063-127-139-252200-
/O.CON.TJSJ.FF.W.0003.000000T0000Z-160425T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN JUAN PR-CAGUAS PR-TRUJILLO ALTO PR-GURABO PR-
307 PM AST MON APR 25 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 600 PM AST FOR SAN
JUAN...CAGUAS...TRUJILLO ALTO AND GURABO MUNICIPALITIES...

AT 305 PM AST...GAUGE REPORTS SHOWED THAT RIO CANAS IN THE
MUNICIPALITY OF CAGUAS WAS JUST INCHES AWAY FROM FLOODING AND IS
RISING RAPIDLY. FLOOD STAGE IS 16 FEET.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

REMAIN ALERT FOR FLOODING EVEN IN LOCATIONS NOT RECEIVING RAIN.
ARROYOS...STREAMS AND RIVERS CAN BECOME RAGING KILLER CURRENTS IN A
MATTER OF MINUTES...EVEN FROM DISTANT RAINFALL.

&&

LAT...LON 1831 6601 1823 6597 1824 6600 1823 6605
      1831 6605

$$

SNELL

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

796 
WGCA72 TJSJ 252157
FFSSJU

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN JUAN PR
557 PM AST MON APR 25 2016

PRC025-063-127-139-252201-
/O.EXP.TJSJ.FF.W.0003.000000T0000Z-160425T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN JUAN PR-CAGUAS PR-TRUJILLO ALTO PR-GURABO PR-
557 PM AST MON APR 25 2016

...THE FLASH FLOOD WARNING FOR SAN JUAN...CAGUAS...TRUJILLO ALTO AND
GURABO MUNICIPALITIES WILL EXPIRE AT 600 PM AST...

FLOOD WATERS HAVE RECEDED...AND ARE NO LONGER EXPECTED TO POSE A
THREAT TO LIFE OR PROPERTY AS ONLY LIGHT RAIN REMAINS. PLEASE
CONTINUE TO HEED ANY ROAD CLOSURES AND WAIT UNTIL THE RIVERS RETURN
TO THEIR NORMAL LEVELS.

LAT...LON 1831 6601 1823 6597 1824 6600 1823 6605
      1831 6605

$$

JJA

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
Apr 25, 11:23 AM CDT	Areal Flood Advisory	JSJ	6 hr
Apr 25, 12:58 PM CDT	Special Weather Statement	JSJ	47 min
Apr 25, 12:59 PM CDT	Special Weather Statement	JSJ	46 min
Apr 25, 1:19 PM CDT	Areal Flood Advisory	JSJ	3 hr
Apr 25, 1:26 PM CDT	Special Weather Statement	JSJ	34 min
Apr 25, 2:05 PM CDT	Areal Flood Advisory	JSJ	3 hr
Apr 25, 2:12 PM CDT	Areal Flood Advisory	JSJ	3 hr
Apr 25, 4:03 PM CDT	Flash Flood Warning	JSJ	3 hr

Nearby

Flash Flood Warnings in Puerto Rico, 2016 Every flash flood warning in 2016

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.