Alert archive / Puerto Rico / Flash Flood Warnings in 2011
Flash Flood Warning 16, NWS JSJ
NWS JSJ issued this flash flood warning at May 17, 2011, 8:00 AM CDT. It was in force for 5 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 17, 2011, 8:00 AM CDT (13:00 UTC)
- Expired
- May 17, 2011, 12:38 PM CDT
- In force
- 5 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 13:01 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.
The text
As transmitted, in the capitals the NWS used until 2016.
966
WGCA52 TJSJ 171300 CCA
FFWSJU
PRC015-057-069-085-095-103-109-129-151-171545-
/O.NEW.TJSJ.FF.W.0016.110517T1300Z-110517T1545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING ... CORRECTION FOR AFFECTED RIVERS
NATIONAL WEATHER SERVICE SAN JUAN PR
900 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 PATILLAS...GUAYANES...BLANCO...VALENCIANO. 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
$$
AAS
ADDITIONAL INFORMATION CAN BE FOUND AT /USE LOWER CASE LETTERS/:
HTTP://WWW.WEATHER.GOV/SANJUAN2 follow-up statements
685
WGCA52 TJSJ 171527
FFWSJU
PRC015-057-069-085-095-103-109-129-151-171745-
/O.EXT.TJSJ.FF.W.0016.000000T0000Z-110517T1745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
1127 AM AST TUE MAY 17 2011
THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS EXTENDED THE
* FLASH FLOOD WARNING FOR...
THE FOLLOWING MUNICIPALITIES
IN PUERTO RICO
SAN LORENZO
LAS PIEDRAS
ARROYO
PATILLAS
MAUNABO
NAGUABO
GUAYAMA
HUMACAO
YABUCOA
* UNTIL 145 PM AST
* AT 1110 AM AST...NWS DOPPLER RADAR INDICATED BANDS OF MODERATE
SHOWERS...SOME OF THEM WITH EMBEDDED HEAVY DOWNPOURS...CONTINUING TO
MOVE ACROSS THE WARNED AREA. RAINFALL AMOUNTS OVER THESE AREAS HAVE
BEEN ON THE ORDER OR 2 TO 3 INCHES...WITH SOME LOCALIZED HEAVIER
AMOUNTS...DURING THE MORNING HOURS. ANY ADDITIONAL RAINFALL WILL
WORSEN THE FLOODING THAT HAS ALREADY BEEN REPORTED IN THESE AREAS.
USGS SENSORS ARE SHOWING SIGNIFICANT RISES ON THE RIVERS IN THESE
AREAS. THE ADDITIONAL RUNOFF WILL LEAD TO CONTINUED RISES ON RIO
PATILLAS...GUAYANES...BLANCO...VALENCIANO...THEREFORE THE FLASH
FLOOD WARNING HAS BEEN EXTENDED UNTIL 145 PM AST.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
IN MOUNTAINOUS OR HILLY TERRAIN...THERE ARE HUNDREDS OF LOW WATER
CROSSINGS WHICH ARE POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT
ATTEMPT TO TRAVEL ACROSS FLOODED ROADS. FIND ALTERNATE ROUTES. IT
ONLY TAKES A FEW INCHES OF SWIFTLY FLOWING WATER TO CARRY VEHICLES
AWAY.
&&
LAT...LON 1795 6613 1809 6609 1813 6591 1829 6579
1815 6568 1808 6574 1797 6587
$$
AAS
ADDITIONAL INFORMATION CAN BE FOUND AT /USE LOWER CASE LETTERS/:
HTTP://WWW.WEATHER.GOV/SANJUAN952
WGCA72 TJSJ 171738
FFSSJU
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN JUAN PR
138 PM AST TUE MAY 17 2011
PRC015-057-069-085-095-103-109-129-151-171739-
/O.CAN.TJSJ.FF.W.0016.000000T0000Z-110517T1745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN LORENZO PR-LAS PIEDRAS PR-ARROYO PR-PATILLAS PR-MAUNABO PR-
NAGUABO PR-GUAYAMA PR-HUMACAO PR-YABUCOA PR-
138 PM AST TUE MAY 17 2011
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR YABUCOA...
HUMACAO...GUAYAMA...NAGUABO...MAUNABO...PATILLAS...ARROYO...LAS
PIEDRAS AND SAN LORENZO 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. HOWEVER... THE POTENTIAL
EXISTS FOR ADDITIONAL DEVELOPMENT ACROSS THESE AREAS AT LEAST UNTIL
8:00 PM AST...AND A FLASH FLOOD WATCH WILL REMAIN IN EFFECT UNTIL
LATER THIS EVENING. PLEASE REFER TO LATEST SJUFFASJU FOR ADDITIONAL
INFORMATION.
USGS SENSORS SHOW THAT MANY OF THE AREA RIVERS HAVE CRESTED OR ARE
CRESTING AT THIS TIME. THESE RIVERS ARE FORECAST TO RECEDE OVER THE
NEXT COUPLE OF HOURS. IF RAINFALL DEVELOPS LATER THIS AFTERNOON INTO
THIS EVENING...EXPECT ADDITIONAL RISES ON THE RIVERS AND STREAMS IN
THIS AREA.
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/SANJUANThe office that day
Everything else NWS JSJ issued on the same UTC day.
| Issued | Product | Office | Counties | 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, 7:49 AM CDT | Flash Flood Warning | JSJ | 3 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, 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; radar from the NEXRAD Level II archive.