Alert archive / Puerto Rico / Flash Flood Warnings in 2011

Flash Flood Warning 15, NWS JSJ

May 17, 2011

NWS JSJ issued this flash flood warning at May 17, 2011, 7:49 AM 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: May 17, 2011, 7:49 AM CDT (12:49 UTC)
Expired: May 17, 2011, 10:45 AM CDT
In force: 3 hr
Issued by: NWS JSJ
Area: Storm-based polygon
Flood severity: None

The radar

The San Juan radar (TJUA), 18 km from the middle of the area, began a volume at 12:49 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
May 17, 7:55 AM CDT	HEAVY RAIN 0	Humacao, PR	CONTINUOUS HEAVY RAINFALL OVER BARRIO FLORIDA IN HUMACAO HAVE LEFT ROAD 973 IMPASSABLE DUE TO FLOOD WATERS ON THE ROADWAY.
May 17, 7:55 AM CDT	HEAVY RAIN 0	Yabucoa, PR	CONTINUOUS HEAVY RAINS ACROSS YABUCOA HAVE CAUSED ROAD 901 TO BECOME IMPASSABLE DUE TO FLOOD WATERS.

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.

905 
WGCA52 TJSJ 171249
FFWSJU
PRC015-057-069-085-095-103-109-129-151-171545-
/O.NEW.TJSJ.FF.W.0015.110517T1249Z-110517T1545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
849 AM AST TUE MAY 17 2011

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  THE FOLLOWING MUNICIPALITIES

  IN PUERTO RICO
     SAN LORENZO
     LAS PIEDRAS
     ARROYO
     PATILLAS
     MAUNABO
     NAGUABO
     GUAYAMA
     HUMACAO
     YABUCOA

* UNTIL 1145 AM AST

* AT 843 AM AST...NWS DOPPLER RADAR INDICATED MODERATE SHOWER 
ACTIVITY ACROSS PARTS OF THE WARNED AREA. ADDITIONAL SHOWERS AND 
THUNDERSTORMS...SOME OF THEM WITH EMBEDDED HEAVY DOWNPOURS...ARE 
EXPECTED THROUGH THE MORNING HOURS. THIS RAINFALL IN ADDITION TO THE 
RAINFALL THAT HAS ALREADY OCCURRED...WILL RESULT IN RAPID RISES ON 
RIO FAJARDO. RESIDENTS IN FLOOD PRONE AREAS SHOULD MOVE TO HIGHER 
GROUND IMMEDIATELY AND NEVER TRY TO CROSS A FLOODED ROADWAY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

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 1795 6613 1809 6609 1813 6591 1829 6579
      1815 6568 1808 6574 1797 6587

$$

AAS

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 16, 10:18 PM CDT	Flash Flood Warning	JSJ	3 hr
May 16, 10:27 PM CDT	Areal Flood Advisory	JSJ	3 hr
May 17, 2:08 AM CDT	Areal Flood Advisory	JSJ	5 hr
May 17, 2:26 AM CDT	Areal Flood Advisory	JSJ	3 hr
May 17, 5:13 AM CDT	Areal Flood Advisory	JSJ	3 hr
May 17, 6:27 AM CDT	Flash Flood Warning	JSJ	3 hr
May 17, 6:51 AM CDT	Areal Flood Advisory	JSJ	114 min
May 17, 7:05 AM CDT	Special Marine Warning	JSJ	40 min
May 17, 7:15 AM CDT	Special Marine Warning	JSJ	30 min
May 17, 7:31 AM CDT	Flash Flood Warning	JSJ	3 hr
May 17, 7:48 AM CDT	Special Marine Warning	JSJ	117 min
May 17, 8:00 AM CDT	Flash Flood Warning	JSJ	5 hr
May 17, 8:21 AM CDT	Flash Flood Watch	JSJ	11 hr
May 17, 9:43 AM CDT	Special Marine Warning	JSJ	2 hr
May 17, 10:40 AM CDT	Areal Flood Advisory	JSJ	110 min
May 17, 12:08 PM CDT	Areal Flood Advisory	JSJ	3 hr
May 17, 12:24 PM CDT	Areal Flood Advisory	JSJ	3 hr
May 17, 1:57 PM CDT	Areal Flood Advisory	JSJ	2 hr
May 17, 2:11 PM CDT	Flash Flood Warning	JSJ	87 min
May 17, 2:13 PM CDT	Special Marine Warning	JSJ	2 hr
May 17, 3:13 PM CDT	Special Marine Warning	JSJ	52 min
May 17, 4:11 PM CDT	Special Marine Warning	JSJ	94 min
May 17, 5:36 PM CDT	Special Marine Warning	JSJ	114 min

Nearby

Flash Flood Warnings in Puerto Rico, 2011 Every flash flood warning in 2011

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.