Alert archive / Puerto Rico / Flash Flood Warnings in 2011
Flash Flood Warning 19, NWS JSJ
NWS JSJ issued this flash flood warning at May 20, 2011, 10:39 AM CDT. It was in force for 12 hr. 3 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 20, 2011, 10:39 AM CDT (15:39 UTC)
- Expired
- May 20, 2011, 11:06 PM CDT
- In force
- 12 hr
- Issued by
- NWS JSJ
- Area
- Storm-based polygon
- Flood severity
- None
The radar
The San Juan radar (TJUA), 14 km from the middle of the area, began a volume at 15:42 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, 11:28 AM CDT | HEAVY RAIN 0 | Maunabo, PR | ROAD 3 NEAR SECTOR MALA PASCUA WAS IMPASSABLE. |
| May 20, 11:30 AM CDT | HEAVY RAIN 0 | Patillas, PR | RIO LAGO CAME OUT OF ITS BANKS AND FLOODED ROAD 184. |
| May 20, 11:55 AM CDT | HEAVY RAIN 0 | Patillas, PR | RIO MARIN CAME OUT OF ITS BANK AND FLOODED ROAD 181 NEAR INT. 7759. |
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.
080
WGCA52 TJSJ 201539
FFWSJU
PRC015-095-109-151-201830-
/O.NEW.TJSJ.FF.W.0019.110520T1539Z-110520T1830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
1139 AM 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
ARROYO
PATILLAS
MAUNABO
YABUCOA
* UNTIL 230 PM AST
* AT 1128 AM AST...NWS DOPPLER RADAR INDICATED BANDS OF MODERATE
SHOWERS...SOME OF THEM WITH EMBEDDED HEAVY DOWNPOURS...CONTINUING TO
DEVELOP AND MOVE ACROSS THE WARNED AREA. RAINFALL AMOUNTS OVER THESE
AREAS...THIS MORNING...HAVE BEEN ON THE ORDER OR ONE TO ONE AND ONE
HALF INCHES...WITH SOME LOCALIZED HEAVIER AMOUNTS. USGS SENSORS ARE
SHOWING SIGNIFICANT RISES ON THE RIVERS IN THESE AREAS...ESPECIALLY
ON THE RIO MARIN...GRANDE DE PATILLAS...YABUCOA AND MAUNABO.
RESIDENTS IN FLOOD PRONE AREAS SHOULD MOVE TO HIGHER GROUND
IMMEDIATELY AND NEVER TRY TO CROSS A FLOODED ROADWAY. IN ADDITION...
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 1807 6610 1810 6603 1808 6583 1802 6582
1798 6591 1796 6605
$$
AAS
ADDITIONAL INFORMATION CAN BE FOUND AT /USE LOWER CASE LETTERS/:
HTTP://WWW.WEATHER.GOV/SANJUAN4 follow-up statements
929
WGCA52 TJSJ 201821
FFWSJU
PRC015-095-109-151-202130-
/O.EXT.TJSJ.FF.W.0019.000000T0000Z-110520T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
221 PM AST FRI MAY 20 2011
THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS EXTENDED THE
* FLASH FLOOD WARNING FOR...
THE FOLLOWING MUNICIPALITIES
IN PUERTO RICO
ARROYO
PATILLAS
MAUNABO
YABUCOA
* UNTIL 530 PM AST
* AT 218 PM AST...NWS DOPPLER WEATHER RADAR CONTINUED TO INDICATE
BANDS OF MODERATE SHOWERS...SOME OF THEM WITH EMBEDDED HEAVY
DOWNPOURS...DEVELOPING AND MOVING ACROSS THE WARNED AREA. RAINFALL
AMOUNTS OVER THESE AREAS THROUGH EARLY THIS AFTERNOON...HAVE BEEN ON
THE ORDER OF 2 TO 3 INCHES...WITH SOME LOCALIZED HEAVIER AMOUNTS.
USGS SENSORS CONTINUE TO SHOW AREA RIVER LEVELS RISING...WITH RIO
MARIN AND RIO GUAYANES CURRENTLY OVERFLOWING THEIR BANKS AND OTHER
RIVERS IN YABUCOA AND MAUNABO SHOWING SIGNIFICANT RISES. RESIDENTS
IN FLOOD PRONE AREAS SHOULD MOVE TO HIGHER GROUND IMMEDIATELY AND
NEVER TRY TO CROSS A FLOODED ROADWAY. IN ADDITION...MUDSLIDES ARE
POSSIBLE OVER AREAS OF STEEP TERRAIN.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. WHEN ENCOUNTERING FLOODED ROADS MAKE THE SMART CHOICE...TURN
AROUND...DONT DROWN.
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.
LAT...LON 1807 6610 1810 6603 1808 6583 1802 6582
1798 6591 1796 6605
$$
BCS/AAS
ADDITIONAL INFORMATION CAN BE FOUND AT /USE LOWER CASE LETTERS/:
HTTP://WWW.WEATHER.GOV/SANJUAN228
WGCA52 TJSJ 202121
FFWSJU
PRC015-095-109-151-210030-
/O.EXT.TJSJ.FF.W.0019.000000T0000Z-110521T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
521 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
ARROYO
PATILLAS
MAUNABO
YABUCOA
* UNTIL 830 PM AST
* AT 515 PM AST... NWS DOPPLER WEATHER RADAR CONTINUED TO INDICATE
BANDS OF MODERATE SHOWERS...SOME OF THEM WITH EMBEDDED HEAVY
DOWNPOURS...DEVELOPING AND MOVING ACROSS THE WARNED AREA. RAINFALL
AMOUNTS OVER THESE AREAS THROUGH LATE THIS AFTERNOON...HAVE BEEN ON
THE ORDER OF 2 TO 3 INCHES...WITH SOME LOCALIZED HEAVIER AMOUNTS.
USGS SENSORS CONTINUE TO SHOW AREA RIVER LEVELS RISING...WITH RIO
MARIN AND RIO GUAYANES CURRENTLY OVERFLOWING THEIR BANKS AND OTHER
RIVERS IN YABUCOA AND MAUNABO SHOWING SIGNIFICANT RISES. RESIDENTS
IN FLOOD PRONE AREAS SHOULD MOVE TO HIGHER GROUND IMMEDIATELY AND
NEVER TRY TO CROSS A FLOODED ROADWAY. IN ADDITION...MUDSLIDES ARE
POSSIBLE OVER AREAS OF STEEP TERRAIN.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD RELATED DEATHS OCCUR
IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS WATER COVERED BRIDGES...
DIPS...OR LOW WATER CROSSINGS. NEVER TRY TO CROSS A FLOWING STREAM...
EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP 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 1807 6610 1810 6603 1808 6583 1802 6582
1798 6591 1796 6605
$$
CASTRO
ADDITIONAL INFORMATION CAN BE FOUND AT /USE LOWER CASE LETTERS/:
HTTP://WWW.WEATHER.GOV/SANJUAN549
WGCA52 TJSJ 210027
FFWSJU
PRC015-095-109-151-210430-
/O.EXT.TJSJ.FF.W.0019.000000T0000Z-110521T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
827 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
ARROYO
PATILLAS
MAUNABO
YABUCOA
* UNTIL 1230 AM AST
* AT 818 PM AST... NWS DOPPLER WEATHER RADAR CONTINUED TO INDICATE
BANDS OF LIGHT TO MODERATE SHOWERS...SOME OF THEM WITH EMBEDDED
HEAVY DOWNPOURS...DEVELOPING AND MOVING ACROSS THE WARNED AREA.
RAINFALL AMOUNTS OVER THESE AREAS THROUGH TONIGHT...HAVE BEEN ON THE
ORDER OF 3 TO 4 INCHES...WITH SOME LOCALIZED HEAVIER AMOUNTS. USGS
SENSORS CONTINUE TO SHOW AREA RIVER LEVELS RISING...WITH RIO
GUAYANES CURRENTLY OVERFLOWING ITS BANKS AND OTHER RIVERS IN YABUCOA
AND MAUNABO SHOWING SIGNIFICANT RISES. RESIDENTS IN FLOOD PRONE
AREAS SHOULD MOVE TO HIGHER GROUND IMMEDIATELY AND NEVER TRY TO
CROSS A FLOODED ROADWAY. IN ADDITION...MUDSLIDES ARE POSSIBLE OVER
AREAS OF STEEP TERRAIN.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD RELATED DEATHS OCCUR
IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS WATER COVERED BRIDGES...
DIPS...OR LOW WATER CROSSINGS. NEVER TRY TO CROSS A FLOWING STREAM...
EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP 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 1807 6610 1810 6603 1808 6583 1802 6582
1798 6591 1796 6605
$$
CASTRO
ADDITIONAL INFORMATION CAN BE FOUND AT /USE LOWER CASE LETTERS/:
HTTP://WWW.WEATHER.GOV/SANJUAN070
WGCA72 TJSJ 210406
FFSSJU
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN JUAN PR
1206 AM AST SAT MAY 21 2011
PRC015-095-109-151-210414-
/O.CAN.TJSJ.FF.W.0019.000000T0000Z-110521T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ARROYO PR-PATILLAS PR-MAUNABO PR-YABUCOA PR-
1206 AM AST SAT MAY 21 2011
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR YABUCOA...
MAUNABO...PATILLAS AND ARROYO MUNICIPALITIES...
RIVER SENSORS INDICATE THAT BOTH THE MARIN RIVER IN PATILLAS AND THE
GUAYANES RIVER IN YABUCOA HAVE FALLEN BELOW FLOOD STAGE. ANY
ADDITIONAL RAINFALL WILL BE MINIMAL AND NOT CAUSE ANY SIGNIFICANT
RISES. THEREFORE...THE FLASH FLOOD WARNING HAS BEEN CANCELLED.
LAT...LON 1807 6610 1810 6603 1808 6583 1802 6582
1798 6591 1796 6605
$$
ROSA
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, 11:43 AM CDT | Areal Flood Advisory | JSJ | 5 hr | |
| May 20, 12:19 PM CDT | Areal Flood Warning | JSJ | 12 hr | |
| May 20, 12:42 PM CDT | Flash Flood Warning | JSJ | 6 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.