Alert archive / Puerto Rico / Flash Flood Warnings in 2016

Flash Flood Warning 13, NWS JSJ

April 30, 2016

NWS JSJ issued this flash flood warning at Apr 30, 2016, 5:15 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: Apr 30, 2016, 5:15 AM CDT (10:15 UTC)
Expired: Apr 30, 2016, 9:45 AM 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 10:14 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.

342 
WGCA52 TJSJ 301015
FFWSJU
PRC015-035-069-077-085-095-109-129-151-301315-
/O.NEW.TJSJ.FF.W.0013.160430T1015Z-160430T1315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
615 AM AST SAT APR 30 2016

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SAN LORENZO MUNICIPALITY IN PUERTO RICO...
  ARROYO MUNICIPALITY IN PUERTO RICO...
  PATILLAS MUNICIPALITY IN PUERTO RICO...
  YABUCOA MUNICIPALITY IN PUERTO RICO...
  JUNCOS MUNICIPALITY IN PUERTO RICO...
  HUMACAO MUNICIPALITY IN PUERTO RICO...
  LAS PIEDRAS MUNICIPALITY IN PUERTO RICO...
  MAUNABO MUNICIPALITY IN PUERTO RICO...
  CAYEY MUNICIPALITY IN PUERTO RICO...

* UNTIL 915 AM AST

* AT 611 AM AST...DOPPLER RADAR INDICATED HEAVY RAIN ACROSS THE
  WARNED AREA. SOILS REMAIN SATURATED DUE TO PREVIOUS RAINFALL...
  WITH THE ADDITIONAL HEAVY RAIN FLASH FLOODING IS EXPECTED TO
  AFFECT THESE AREAS. EXCESSIVE RAINFALL AND RUNOFF OVER THE WARNED
  AREA WILL CAUSE MUD SLIDES NEAR STEEP TERRAIN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

STAY AWAY OR BE SWEPT AWAY. RIVER BANKS AND CULVERTS CAN BECOME
UNSTABLE AND UNSAFE.

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 1827 6583 1825 6582 1820 6583 1820 6579
      1817 6575 1806 6581 1805 6584 1801 6583
      1797 6599 1798 6602 1796 6606 1802 6609
      1812 6605 1812 6603 1820 6600 1823 6597
      1823 6594 1825 6595 1827 6592 1825 6587

$$

CAM

4 follow-up statements

516 
WGCA72 TJSJ 301144
FFSSJU

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN JUAN PR
744 AM AST SAT APR 30 2016

PRC015-035-069-077-085-095-109-129-151-301315-
/O.CON.TJSJ.FF.W.0013.000000T0000Z-160430T1315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN LORENZO PR-ARROYO PR-PATILLAS PR-YABUCOA PR-JUNCOS PR-HUMACAO PR-
LAS PIEDRAS PR-MAUNABO PR-CAYEY PR-
744 AM AST SAT APR 30 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 AM AST FOR SAN
LORENZO...ARROYO...PATILLAS...YABUCOA...JUNCOS...HUMACAO...LAS
PIEDRAS...MAUNABO AND CAYEY MUNICIPALITIES...

AT 733 AM AST...ALTHOUGH THE DOPPLER RADAR INDICATED THAT THE HEAVY
RAIN WHICH AFFECT THESE MUNICIPALITIES HAVE DIMINISHED...ANOTHER
ROUND OF MODERATE TO HEAVY RAIN STILL EXPECTED IN THE NEXT HALF AN
HOUR OR SO. THE POTENTIAL FOR FLASH FLOODING AS WELL AS MUD SLIDES
NEAR STEEP TERRAIN DUE TO EXCESSIVE RUNOFF AND NEW HEAVY RAINFALL
STILL LIKELY ACROSS THE WARNED AREA. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

STAY AWAY OR BE SWEPT AWAY. RIVER BANKS AND CULVERTS CAN BECOME
UNSTABLE AND UNSAFE. 

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 1827 6583 1825 6582 1820 6583 1820 6579
      1817 6575 1806 6581 1805 6584 1801 6583
      1797 6599 1798 6602 1796 6606 1802 6609
      1812 6605 1812 6603 1820 6600 1823 6597
      1823 6594 1825 6595 1827 6592 1825 6587

$$

CAM

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

242 
WGCA72 TJSJ 301257
FFSSJU

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN JUAN PR
857 AM AST SAT APR 30 2016

PRC015-035-069-077-085-129-301306-
/O.CAN.TJSJ.FF.W.0013.000000T0000Z-160430T1315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN LORENZO PR-ARROYO PR-JUNCOS PR-HUMACAO PR-LAS PIEDRAS PR-
CAYEY PR-
857 AM AST SAT APR 30 2016

...THE FLASH FLOOD WARNING FOR SAN LORENZO...ARROYO...JUNCOS...
HUMACAO...LAS PIEDRAS AND CAYEY MUNICIPALITIES IS CANCELLED...

THE HEAVY RAIN HAS ENDED...AND FLOODING IS NO LONGER EXPECTED TO POSE
A THREAT. PLEASE CONTINUE TO HEED ALL ROAD CLOSURES.

LAT...LON 1798 6602 1801 6605 1804 6605 1804 6608
      1811 6605 1810 6602 1808 6601 1809 6598
      1809 6593 1812 6593 1813 6591 1811 6587
      1812 6585 1810 6585 1807 6580 1805 6584
      1801 6583 1797 6599

$$

PRC095-109-151-301315-
/O.CON.TJSJ.FF.W.0013.000000T0000Z-160430T1315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PATILLAS PR-YABUCOA PR-MAUNABO PR-
857 AM AST SAT APR 30 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 AM AST FOR
PATILLAS...YABUCOA AND MAUNABO MUNICIPALITIES...

AT 856 AM AST...ALTHOUGH THE DOPPLER RADAR INDICATED THAT THE HEAVY
RAIN WHICH AFFECT THESE MUNICIPALITIES HAVE DIMINISHED...ANOTHER
ROUND OF MODERATE TO HEAVY RAIN STILL EXPECTED IN THE NEXT HALF AN
HOUR OR SO. THE POTENTIAL FOR FLASH FLOODING AS WELL AS MUD SLIDES
NEAR STEEP TERRAIN DUE TO EXCESSIVE RUNOFF AND NEW HEAVY RAINFALL
STILL LIKELY ACROSS THE WARNED AREA. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

STAY AWAY OR BE SWEPT AWAY. RIVER BANKS AND CULVERTS CAN BECOME
UNSTABLE AND UNSAFE.

&&

LAT...LON 1798 6602 1801 6605 1804 6605 1804 6608
      1811 6605 1810 6602 1808 6601 1809 6598
      1809 6593 1812 6593 1813 6591 1811 6587
      1812 6585 1810 6585 1807 6580 1805 6584
      1801 6583 1797 6599

$$

ER

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

610 
WGCA52 TJSJ 301302
FFWSJU
PRC095-109-151-301445-
/O.EXT.TJSJ.FF.W.0013.000000T0000Z-160430T1445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
902 AM AST SAT APR 30 2016

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  PATILLAS MUNICIPALITY IN PUERTO RICO...
  YABUCOA MUNICIPALITY IN PUERTO RICO...
  MAUNABO MUNICIPALITY IN PUERTO RICO...

* UNTIL 1045 AM AST

* AT 857 AM AST...EMERGENCY MANAGERS AS WELL AS USGS RIVER SENSORS
  REPORTED THAT THE RIO GUAYANES IS OUT OF ITS BANKS NEAR CENTRAL
  ROIG. ADDITIONAL HEAVY RAINS AND EXCESSIVE RUNOFF WILL CONTINUE TO
  CREATE FLOODING ALONG RIO GUAYANES AND ITS TRIBUTARIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

STAY AWAY OR BE SWEPT AWAY. RIVER BANKS AND CULVERTS CAN BECOME
UNSTABLE AND UNSAFE.

&&

LAT...LON 1798 6602 1801 6605 1804 6605 1804 6608
      1811 6605 1810 6602 1808 6601 1809 6598
      1809 6593 1812 6593 1813 6591 1811 6587
      1812 6585 1810 6585 1807 6580 1805 6584
      1801 6583 1797 6599

$$

ER/RAM

580 
WGCA72 TJSJ 301447
FFSSJU

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN JUAN PR
1047 AM AST SAT APR 30 2016

PRC095-109-151-301451-
/O.EXP.TJSJ.FF.W.0013.000000T0000Z-160430T1445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PATILLAS PR-YABUCOA PR-MAUNABO PR-
1047 AM AST SAT APR 30 2016

...THE FLASH FLOOD WARNING FOR PATILLAS...YABUCOA AND MAUNABO
MUNICIPALITIES WILL EXPIRE AT 1045 AM AST...

...THE FLASH FLOOD WARNING FOR SAN LORENZO...ARROYO...JUNCOS...
HUMACAO...LAS PIEDRAS AND CAYEY MUNICIPALITIES WILL BE ALLOWED TO
EXPIRE AT 10:45 AM AST...

THE FLOOD WATERS FROM RECENT HEAVY RAINS CONTINUE TO RECEDE...AND
FLOODING IS NO LONGER EXPECTED TO POSE A THREAT TO LIFE AND PROPERTY
AT THE MOMENT. HOWEVER...PLEASE CONTINUE TO HEED ALL ROAD CLOSURES
AND AVOID HIGH RIVERS AND STREAMS...AS ADDITIONAL SHOWERS AND
THUNDERSTORMS CAN DEVELOP LATER THIS AFTERNOON. FOR THIS REASON...A
FLASH FLOOD WATCH WILL REMAIN IN EFFECT UNTIL LATER THIS EVENING. 

LAT...LON 1798 6602 1801 6605 1804 6605 1804 6608
      1811 6605 1810 6602 1808 6601 1809 6598
      1809 6593 1812 6593 1813 6591 1811 6587
      1812 6585 1810 6585 1807 6580 1805 6584
      1801 6583 1797 6599

$$

RAM/ER/ICP

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, 2:29 AM CDT	Special Marine Warning	JSJ	2 hr
Apr 30, 3:34 AM CDT	Flash Flood Watch	JSJ	15 hr
Apr 30, 3:50 AM CDT	Areal Flood Advisory	JSJ	3 hr
Apr 30, 4:09 AM CDT	Areal Flood Advisory	JSJ	5 hr
Apr 30, 4:25 AM CDT	Areal Flood Advisory	JSJ	3 hr
Apr 30, 5:11 AM CDT	Special Marine Warning	JSJ	2 hr
Apr 30, 5:54 AM CDT	Areal Flood Advisory	JSJ	3 hr
Apr 30, 7:17 AM CDT	Special Marine Warning	JSJ	28 min
Apr 30, 7:44 AM CDT	Special Marine Warning	JSJ	2 hr
Apr 30, 9:44 AM CDT	Special Marine Warning	JSJ	2 hr
Apr 30, 10:22 AM CDT	Special Weather Statement	JSJ	113 min
Apr 30, 11:09 AM CDT	Special Weather Statement	JSJ	81 min
Apr 30, 11:47 AM CDT	Special Marine Warning	JSJ	118 min
Apr 30, 12:28 PM CDT	Special Weather Statement	JSJ	2 hr
Apr 30, 1:46 PM CDT	Special Marine Warning	JSJ	44 min

Nearby

Flash Flood Warnings in Puerto Rico, 2016 Every flash flood warning in 2016

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.