Alert archive / Puerto Rico / Flash Flood Warnings in 2011
Flash Flood Warning 20, NWS JSJ
NWS JSJ issued this flash flood warning at May 20, 2011, 12:42 PM CDT. It was in force for 6 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
- May 20, 2011, 12:42 PM CDT (17:42 UTC)
- Expired
- May 20, 2011, 6:22 PM CDT
- In force
- 6 hr
- Issued by
- NWS JSJ
- Area
- Storm-based polygon
- Flood severity
- None
The radar
The San Juan radar (TJUA), 36 km from the middle of the area, began a volume at 17:43 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 20, 3:45 PM CDT | FLASH FLOOD | Ceiba, PR | A FLOODED HOUSE IN BARRIO SACO ON ROAD 975. |
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.
303
WGCA52 TJSJ 201742
FFWSJU
PRC037-053-069-085-089-103-119-202030-
/O.NEW.TJSJ.FF.W.0020.110520T1742Z-110520T2030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
142 PM AST FRI MAY 20 2011
THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS ISSUED A
* FLASH FLOOD WARNING FOR...
THE FOLLOWING MUNICIPALITIES
IN PUERTO RICO
LAS PIEDRAS
LUQUILLO
NAGUABO
CEIBA
FAJARDO
HUMACAO
RIO GRANDE
* UNTIL 430 PM AST
* AT 133 PM AST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SHOWERS AND THUNDERSTORMS...SOME OF THEM WITH EMBEDDED HEAVY
DOWNPOURS MOVING ACROSS THE WARNED AREA. THIS RAINFALL IN ADDITION
TO THE RAINFALL THAT HAS ALREADY OCCURRED...WILL RESULT IN RAPID
RISES ON RIO FAJARDO...BLANCO...MAMEYES AND ESPIRITU SANTO.
RESIDENTS IN FLOOD PRONE AREAS SHOULD MOVE TO HIGHER GROUND
IMMEDIATELY AND NEVER TRY TO CROSS A FLOODED ROADWAY. MUDSLIDES ARE
POSSIBLE OVER AREAS OF STEEP TERRAIN.
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 1816 6589 1823 6579 1844 6586 1839 6560
1819 6558 1812 6568 1809 6575
$$
AAS
ADDITIONAL INFORMATION CAN BE FOUND AT /USE LOWER CASE LETTERS/:
HTTP://WWW.WEATHER.GOV/SANJUAN2 follow-up statements
703
WGCA52 TJSJ 202024
FFWSJU
PRC037-053-069-085-089-103-119-202330-
/O.EXT.TJSJ.FF.W.0020.000000T0000Z-110520T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
424 PM AST FRI MAY 20 2011
THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS EXTENDED THE
* FLASH FLOOD WARNING FOR...
THE FOLLOWING MUNICIPALITIES
IN PUERTO RICO
LAS PIEDRAS
LUQUILLO
NAGUABO
CEIBA
FAJARDO
HUMACAO
RIO GRANDE
* UNTIL 730 PM AST
* AT 416 PM AST...NATIONAL WEATHER SERVICE DOPPLER WEATHER RADAR
CONTINUED TO INDICATE INTERMITTENT BANDS OF SHOWERS...SOME WITH VERY
HEAVY RAIN CONTINUING TO MOVE ACROSS THE OVER THE WARNED AREA.
THEREFORE...THE FLASH FLOOD WARNING HAS BEEN EXTENDED UNTIL 730 PM
AST.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. WHEN ENCOUNTERING FLOODED ROADS MAKE THE SMART CHOICE...TURN
AROUND...DONT DROWN. MOVE TO HIGHER GROUND.
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.
&&
LAT...LON 1816 6589 1823 6579 1844 6586 1839 6560
1819 6558 1812 6568 1809 6575
$$
AAS
ADDITIONAL INFORMATION CAN BE FOUND AT /USE LOWER CASE LETTERS/:
HTTP://WWW.WEATHER.GOV/SANJUAN563
WGCA72 TJSJ 202322
FFSSJU
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN JUAN PR
722 PM AST FRI MAY 20 2011
PRC037-053-069-085-089-103-119-202330-
/O.CAN.TJSJ.FF.W.0020.000000T0000Z-110520T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LAS PIEDRAS PR-LUQUILLO PR-NAGUABO PR-CEIBA PR-FAJARDO PR-HUMACAO PR-
RIO GRANDE PR-
722 PM AST FRI MAY 20 2011
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR RIO GRANDE...
HUMACAO...FAJARDO...CEIBA...NAGUABO...LUQUILLO AND LAS PIEDRAS
MUNICIPALITIES...
DOPPLER RADAR INDICATED THAT THE MODERATE TO HEAVY RAIN WHICH
AFFECTED THESE AREAS OF PUERTO RICO HAD DECREASED IN INTENSITY. THE
POTENTIAL FOR HEAVY RAIN TO MOVE INTO THE REGION INTO THE EARLY
MORNING HOURS REMAIN HIGH...SO CONTINUE TO MONITOR THE NWS.
A FLASH FLOOD WATCH ALSO REMAINS IN EFFECT FOR THESE AREAS UNTIL
4 AM AST SATURDAY...AND LOCAL RESIDENTS SHOULD CLOSELY MONITOR
RIVER LEVELS AND BE PREPARED TO SEEK HIGHER GROUND IF A FLASH FLOOD
WARNING IS ISSUED.
LAT...LON 1816 6589 1823 6579 1844 6586 1839 6560
1819 6558 1812 6568 1809 6575
$$
AAS
ADDITIONAL INFORMATION CAN BE FOUND AT /USE LOWER CASE LETTERS/:
HTTP://WWW.WEATHER.GOV/SANJUANThe office that day
Everything else NWS JSJ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 8:17 PM CDT | Areal Flood Advisory | JSJ | 5 hr | |
| May 20, 2:44 AM CDT | Flash Flood Watch | JSJ | 24 hr | |
| May 20, 7:21 AM CDT | Areal Flood Advisory | JSJ | 3 hr | |
| May 20, 8:38 AM CDT | Areal Flood Advisory | JSJ | 11 hr | |
| May 20, 8:59 AM CDT | Areal Flood Advisory | JSJ | 3 hr | |
| May 20, 9:33 AM CDT | Special Marine Warning | JSJ | 87 min | |
| May 20, 10:13 AM CDT | Areal Flood Advisory | JSJ | 3 hr | |
| May 20, 10:39 AM CDT | Flash Flood Warning | JSJ | 12 hr | |
| May 20, 11:43 AM CDT | Areal Flood Advisory | JSJ | 5 hr | |
| May 20, 12:19 PM CDT | Areal Flood Warning | JSJ | 12 hr | |
| May 20, 12:54 PM CDT | Areal Flood Advisory | JSJ | 3 hr | |
| May 20, 2:09 PM CDT | Flash Flood Warning | JSJ | 9 hr | |
| May 20, 2:45 PM CDT | Flash Flood Warning | JSJ | 3 hr | |
| May 20, 2:46 PM CDT | Areal Flood Advisory | JSJ | 10 hr | |
| May 20, 4:01 PM CDT | Flash Flood Warning | JSJ | 4 hr | |
| May 20, 4:36 PM CDT | Special Marine Warning | JSJ | 54 min | |
| May 20, 5:28 PM CDT | Areal Flood Advisory | JSJ | 3 hr | |
| May 20, 5:34 PM CDT | Special Marine Warning | JSJ | 116 min | |
| May 20, 5:55 PM CDT | Areal Flood Advisory | JSJ | 3 hr | |
| May 20, 6:08 PM CDT | Flash Flood Warning | JSJ | 4 hr | |
| May 20, 6:52 PM CDT | Areal Flood Advisory | JSJ | 4 hr |
Nearby
Flash Flood Warnings in Puerto Rico, 2011Every 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.