Alert archive / Puerto Rico / Flash Flood Warnings in 2016

Flash Flood Warning 4, NWS JSJ

April 25, 2016

NWS JSJ issued this flash flood warning at Apr 25, 2016, 4:03 PM CDT. It was in force for 3 hr. 2 reports 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: Apr 25, 2016, 4:03 PM CDT (21:03 UTC)
Expired: Apr 25, 2016, 7:00 PM CDT
In force: 3 hr
Issued by: NWS JSJ
Area: Storm-based polygon
Flood severity: None

The radar

The San Juan radar (TJUA), 76 km from the middle of the area, began a volume at 21:07 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
Apr 25, 4:28 PM CDT	FLASH FLOOD	Penuelas, PR	RUSSO RIVER REPORTED TO BE OUT OF ITS BANKS.
Apr 25, 6:03 PM CDT	FLASH FLOOD	5 Ne Guanica, PR	WATER CLOSED HIGHWAY 121 AT RIO LOCO. PHOTOGRAPH FROM TWITTER.

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

The text

As transmitted.

304 
WGCA52 TJSJ 252103
FFWSJU
PRC055-059-111-121-153-260000-
/O.NEW.TJSJ.FF.W.0004.160425T2103Z-160426T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  GUANICA MUNICIPALITY IN PUERTO RICO...
  SABANA GRANDE MUNICIPALITY IN PUERTO RICO...
  PENUELAS MUNICIPALITY IN PUERTO RICO...
  YAUCO MUNICIPALITY IN PUERTO RICO...
  GUAYANILLA MUNICIPALITY IN PUERTO RICO...

* UNTIL 800 PM AST

* AT 500 PM AST...DOPPLER RADAR AND GAUGE REPORTS INDICATED HEAVY
  RAIN FALLING ACROSS THE WARNED AREA. TWO TO THREE INCHES OF RAIN
  HAVE ALREADY FALLEN AND MANY STREAM ARE RUNNING FULL. FLASH
  FLOODING IS EXPECTED TO BEGIN SHORTLY...ESPECIALLY AT RIO
  GUAYANILLA. 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 1 TO 2 INCHES ARE POSSIBLE IN THE
WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 1807 6693 1811 6687 1811 6671 1798 6670
      1799 6672 1799 6674 1798 6674 1799 6675
      1797 6675 1798 6676 1800 6675 1801 6677
      1800 6680 1798 6681 1798 6678 1797 6679
      1795 6684

$$

SNELL

1 follow-up statement

885 
WGCA72 TJSJ 252359
FFSSJU

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

PRC055-059-111-121-153-260006-
/O.EXP.TJSJ.FF.W.0004.000000T0000Z-160426T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GUANICA PR-SABANA GRANDE PR-PENUELAS PR-YAUCO PR-GUAYANILLA PR-
759 PM AST MON APR 25 2016

...THE FLASH FLOOD WARNING FOR GUANICA...SABANA GRANDE...PENUELAS...
YAUCO AND GUAYANILLA MUNICIPALITIES WILL EXPIRE AT 800 PM AST...

FLOOD WATERS ARE RECEDING...THE HEAVY RAINS THAT AFFECTED THE AREA
HAVE DIMINISHED OR MOVED AWAY. PLEASE CONTINUE TO HEED ANY ROAD
CLOSURES AND WATCH FOR PONDING OF WATER ON ROADWAYS OR POOR DRAINAGE
AREAS. FOR THOSE REASONS THE FLASH FLOOD WARNING WILL BE ALLOWED TO
EXPIRE.

LAT...LON 1807 6693 1811 6687 1811 6671 1798 6670
      1799 6672 1799 6674 1798 6674 1799 6675
      1797 6675 1798 6676 1800 6675 1801 6677
      1800 6680 1798 6681 1798 6678 1797 6679
      1795 6684

$$

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, 2:04 PM CDT	Flash Flood Warning	JSJ	3 hr
Apr 25, 2:05 PM CDT	Areal Flood Advisory	JSJ	3 hr
Apr 25, 2:12 PM CDT	Areal Flood Advisory	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; local storm reports from the same archive; radar from the NEXRAD Level II archive.