Alert archive / Puerto Rico / Flash Flood Warnings in 2015

Flash Flood Warning 9, NWS JSJ

October 25, 2015

NWS JSJ issued this flash flood warning at Oct 25, 2015, 12:41 PM CDT. It was in force for 3 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: Oct 25, 2015, 12:41 PM CDT (17:41 UTC)
Expired: Oct 25, 2015, 3:45 PM CDT
In force: 3 hr
Issued by: NWS JSJ
Area: Storm-based polygon
Flood severity: None

The radar

The San Juan radar (TJUA), 15 km from the middle of the area, began a volume at 17:41 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
Oct 25, 3:36 PM CDT	FLASH FLOOD	Caguas, PR	USGS RIVER GAUGE CAGP4 INDICATED RIO GRANDE DE LOIZA IN THE BORDER BETWEEN CAGUAS AND GURABO WENT OUT OF ITS BANKS. RIVER CRESTED AT 17.64 FEET. FLOOD STAGE IS 16 FEET.

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.

269 
WGCA52 TJSJ 251741
FFWSJU
PRC007-021-025-045-061-063-127-139-252045-
/O.NEW.TJSJ.FF.W.0009.151025T1741Z-151025T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
141 PM AST SUN OCT 25 2015

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...
  AGUAS BUENAS MUNICIPALITY IN PUERTO RICO...
  COMERIO MUNICIPALITY IN PUERTO RICO...
  TRUJILLO ALTO MUNICIPALITY IN PUERTO RICO...
  GUAYNABO MUNICIPALITY IN PUERTO RICO...
  GURABO MUNICIPALITY IN PUERTO RICO...
  BAYAMON MUNICIPALITY IN PUERTO RICO...

* UNTIL 445 PM AST
    
* AT 138 PM AST...DOPPLER RADAR INDICATED A CLUSTER OF THUNDERSTORMS 
  PRODUCING TORRENTIAL RAINFALL ACROSS THE WARNED AREA. UP TO TWO 
  INCHES OF RAIN HAVE ALREADY FALLEN. THE MOST INTENSE RAINFALL IS 
  FALLING ALONG THE BORDER OF GUAYNABO...SAN JUAN...CAGUAS...AGUAS 
  BUENAS AND BAYAMON. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY IN 
  PORTIONS OF THE WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

STAY AWAY OR BE SWEPT AWAY. RIVER BANKS AND CULVERTS CAN BECOME 
UNSTABLE AND UNSAFE.

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD 
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 1827 6592 1818 6604 1817 6610 1818 6610
      1821 6612 1820 6614 1823 6615 1820 6621
      1817 6621 1819 6625 1822 6627 1825 6626
      1825 6623 1828 6621 1830 6621 1834 6619
      1837 6600

$$

ER/DS

1 follow-up statement

502 
WGCA72 TJSJ 252055
FFSSJU

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN JUAN PR
455 PM AST SUN OCT 25 2015

PRC007-021-025-045-061-063-127-139-252102-
/O.EXP.TJSJ.FF.W.0009.000000T0000Z-151025T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN JUAN PR-CAGUAS PR-AGUAS BUENAS PR-COMERIO PR-TRUJILLO ALTO PR-
GUAYNABO PR-GURABO PR-BAYAMON PR-
455 PM AST SUN OCT 25 2015

...THE FLASH FLOOD WARNING FOR SAN JUAN...CAGUAS...AGUAS BUENAS...
COMERIO...TRUJILLO ALTO...GUAYNABO...GURABO AND BAYAMON
MUNICIPALITIES HAS EXPIRED...

THE HEAVY RAIN HAS ENDED ACROSS THESE MUNICIPALITIES. HOWEVER...THE 
USGS RIVER GAGE AT RIO GRANDE DE LOIZA SHOWED RIVER AND TRIBUTARIES 
ARE AT NEAR OR ABOVE FLOOD STAGE AND FLOODING IS STILL OCURRING 
ACROSS SOME AREAS IN THE WARNED AREA. THEREFORE...THE FLASH FLOOD 
WARNING WILL BE REPLACED WITH A RIVER FLOOD WARNING FOR RIO GRANDE 
DE LOIZA. 

LAT...LON 1827 6592 1818 6604 1817 6610 1818 6610
      1821 6612 1820 6614 1823 6615 1820 6621
      1817 6621 1819 6625 1822 6627 1825 6626
      1825 6623 1828 6621 1830 6621 1834 6619
      1837 6600

$$
FC

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
Oct 24, 7:21 PM CDT	Areal Flood Warning	JSJ	6 hr
Oct 25, 6:45 AM CDT	Flash Flood Watch	JSJ	60 hr
Oct 25, 12:00 PM CDT	Areal Flood Advisory	JSJ	3 hr
Oct 25, 12:20 PM CDT	Areal Flood Advisory	JSJ	3 hr
Oct 25, 12:32 PM CDT	Special Weather Statement	JSJ	58 min
Oct 25, 12:56 PM CDT	Areal Flood Advisory	JSJ	3 hr
Oct 25, 1:13 PM CDT	Areal Flood Advisory	JSJ	3 hr
Oct 25, 1:39 PM CDT	Flash Flood Warning	JSJ	3 hr
Oct 25, 1:48 PM CDT	Areal Flood Advisory	JSJ	3 hr
Oct 25, 2:11 PM CDT	Flash Flood Warning	JSJ	3 hr
Oct 25, 2:33 PM CDT	Areal Flood Advisory	JSJ	6 hr
Oct 25, 2:47 PM CDT	Areal Flood Advisory	JSJ	3 hr
Oct 25, 3:13 PM CDT	Areal Flood Advisory	JSJ	3 hr
Oct 25, 3:52 PM CDT	Areal Flood Warning	JSJ	8 hr
Oct 25, 4:28 PM CDT	Areal Flood Advisory	JSJ	3 hr
Oct 25, 4:35 PM CDT	Special Weather Statement	JSJ	85 min
Oct 25, 5:05 PM CDT	Flash Flood Warning	JSJ	3 hr

Nearby

Flash Flood Warnings in Puerto Rico, 2015 Every flash flood warning in 2015

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.