Alert archive / Puerto Rico / Flash Flood Warnings in 2013

Flash Flood Warning 4, NWS JSJ

April 30, 2013

NWS JSJ issued this flash flood warning at Apr 30, 2013, 1:13 PM CDT. It was in force for 2 hr. 8 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 30, 2013, 1:13 PM CDT (18:13 UTC)
Expired: Apr 30, 2013, 3:15 PM CDT
In force: 2 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 18:15 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 30, 1:16 PM CDT	FLASH FLOOD	San Juan, PR	HEAVY RAIN OVER THE SAN JUAN METROPOLITAN AREA RESULTED THE SMALL STREAM RISEN TO 1 TO 2 FEET OVER THE RIVER BANKS...AFFECTING THE DIEGO AVENUE AND PINERO AVENUE.
Apr 30, 1:23 PM CDT	FLASH FLOOD	Guaynabo, PR	ROAD IN FRONT OF GARDEN HILL SHOPPING CENTER WAS FLOODED AND CLOSED. ALSO, MARTINEZ NADAL AVENUE WAS CLOSED.
Apr 30, 1:26 PM CDT	FLASH FLOOD	Guaynabo, PR	ESMERALDA AVENUE WAS REPORTED FLOODED.
Apr 30, 1:49 PM CDT	FLASH FLOOD	San Juan, PR	KENNEDY AVENUE CLOSED DUE TO FLOODING NEAR METRO OFFICE BUILDING.
Apr 30, 1:59 PM CDT	FLASH FLOOD	San Juan, PR	KENNEDY AVENUE WAS REPORTED FLOODED WITH CARS STRANDED.
Apr 30, 2:04 PM CDT	FLASH FLOOD	San Juan, PR	KENNEDY AVENUE FLOODED AT EXIT 6 TOWARD SAN JUAN.
Apr 30, 2:13 PM CDT	FLASH FLOOD	Guaynabo, PR	SAN PATRICIO SHOPPING CENTER WAS REPORTED FLOODED.
Apr 30, 2:21 PM CDT	FLASH FLOOD	San Juan, PR	ROOSEVELT AVENUE IN FRONT OF SAN PATRICIO SHOPPING CENTER WAS FLOODED AND IMPASSABLE.

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.

200 
WGCA52 TJSJ 301813
FFWSJU
PRC061-127-302015-
/O.NEW.TJSJ.FF.W.0004.130430T1813Z-130430T2015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
213 PM AST TUE APR 30 2013

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  THE FOLLOWING MUNICIPALITIES

  IN PUERTO RICO
     GUAYNABO
     SAN JUAN

* UNTIL 415 PM AST

* AT 203 PM AST...HEAVY RAINFALL OVER THE SAN JUAN AND GUAYNABO HAS 
CAUSED SHARP RISES ON THE RIO PIEDRAS. AT 230 PM AST...USGS SENSOR 
INDICATED THE RIVER AT 10.21 FEET AND RISING RAPIDLY AND FLOOD STAGE 
IS 11 FEET. URBAN AREAS ALSO CAN EXPERIENCE FLASH FLOODING IN THE 
NEXT HOUR OR SO.

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 1838 6603 1834 6604 1832 6608 1839 6612
      1840 6613 1844 6612 1845 6611 1845 6608

$$

ER

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

1 follow-up statement

290 
WGCA72 TJSJ 302007
FFSSJU

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN JUAN PR
407 PM AST TUE APR 30 2013

PRC061-127-302015-
/O.EXP.TJSJ.FF.W.0004.000000T0000Z-130430T2015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GUAYNABO PR-SAN JUAN PR-
407 PM AST TUE APR 30 2013

...THE FLASH FLOOD WARNING WILL EXPIRE AT 415 PM AST FOR SAN JUAN AND
GUAYNABO MUNICIPALITIES...

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

IN ADDITION...U.S.G.S. RIVER SENSORS INDICATE THAT THE RIO PIEDRAS 
IS BELOW FLOOD STAGE AND CONTINUES TO RECEDE. THEREFORE THE FLASH 
FLOOD WARNING WAS ALLOWED TO EXPIRE.


LAT...LON 1838 6603 1834 6604 1832 6608 1839 6612
      1840 6613 1844 6612 1845 6611 1845 6608

$$

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
Apr 30, 12:10 PM CDT	Areal Flood Advisory	JSJ	5 hr
Apr 30, 1:30 PM CDT	Areal Flood Advisory	JSJ	3 hr
Apr 30, 2:31 PM CDT	Areal Flood Advisory	JSJ	4 hr
Apr 30, 2:49 PM CDT	Areal Flood Advisory	JSJ	116 min
Apr 30, 5:21 PM CDT	Areal Flood Advisory	JSJ	114 min

Nearby

Flash Flood Warnings in Puerto Rico, 2013 Every flash flood warning in 2013

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.