Alert archive / Puerto Rico / Flash Flood Warnings in 2016

Flash Flood Warning 18, NWS JSJ

July 31, 2016

NWS JSJ issued this flash flood warning at Jul 31, 2016, 5:25 PM CDT. It was in force for 4 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
Jul 31, 2016, 5:25 PM CDT (22:25 UTC)
Expired
Jul 31, 2016, 9:44 PM CDT
In force
4 hr
Issued by
NWS JSJ
Area
Storm-based polygon
Flood severity
None

The radar

The San Juan radar (TJUA), 8 km from the middle of the area, began a volume at 22:27 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.

810 
WGCA52 TJSJ 312225
FFWSJU
PRC015-035-057-095-109-129-151-010130-
/O.NEW.TJSJ.FF.W.0018.160731T2225Z-160801T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
625 PM AST SUN JUL 31 2016

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SAN LORENZO MUNICIPALITY IN PUERTO RICO...
  GUAYAMA MUNICIPALITY IN PUERTO RICO...
  ARROYO MUNICIPALITY IN PUERTO RICO...
  PATILLAS MUNICIPALITY IN PUERTO RICO...
  YABUCOA MUNICIPALITY IN PUERTO RICO...
  MAUNABO MUNICIPALITY IN PUERTO RICO...
  CAYEY MUNICIPALITY IN PUERTO RICO...

* UNTIL 930 PM AST
    
* AT 624 PM AST...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. UP TO TWO INCHES OF RAIN HAVE
  ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.
  EXCESSIVE RAINFALL OVER THE WARNED AREA WILL CAUSE MUD SLIDES NEAR
  STEEP TERRAIN. THE MUD SLIDE CAN CONSIST OF ROCK...MUD...VEGETATION
  AND OTHER LOOSE MATERIALS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

&&

LAT...LON 1805 6617 1805 6620 1812 6623 1814 6622
      1813 6613 1816 6609 1811 6605 1815 6602
      1815 6597 1812 6593 1812 6585 1810 6585
      1807 6580 1805 6584 1801 6583 1797 6592
      1798 6602 1795 6605 1797 6608 1795 6613

$$

DS
2 follow-up statements
392 
WGCA52 TJSJ 010124
FFWSJU
PRC015-035-057-095-109-129-151-010430-
/O.EXT.TJSJ.FF.W.0018.000000T0000Z-160801T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN JUAN PR
924 PM AST SUN JUL 31 2016

THE NATIONAL WEATHER SERVICE IN SAN JUAN HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  SAN LORENZO MUNICIPALITY IN PUERTO RICO...
  GUAYAMA MUNICIPALITY IN PUERTO RICO...
  ARROYO MUNICIPALITY IN PUERTO RICO...
  PATILLAS MUNICIPALITY IN PUERTO RICO...
  YABUCOA MUNICIPALITY IN PUERTO RICO...
  MAUNABO MUNICIPALITY IN PUERTO RICO...
  CAYEY MUNICIPALITY IN PUERTO RICO...

* UNTIL 1230 AM AST

* AT 921 PM AST...EMERGENCY MANAGEMENT REPORTED FLOODING ACROSS THE
  WARNED AREA. RAINFALL AMOUNTS OF 4 INCHES OF RAIN HAVE FALLEN
  ACROSS PATILLAS...SAN LORENZO AND YABUCOA. FLASH FLOODING IS
  ALREADY OCCURRING. EXCESSIVE RUNOFF FROM THE PREVIOUS RAINFALL
  OVER THE WARNED AREA WILL CAUSE RIVERS TO STAY ABOVE FLOOD STAGE
  ACROSS THESE AREAS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

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

&&

LAT...LON 1805 6617 1805 6620 1812 6623 1814 6622
      1813 6613 1816 6609 1811 6605 1815 6602
      1815 6597 1812 6593 1812 6585 1810 6585
      1807 6580 1805 6584 1801 6583 1797 6592
      1798 6602 1795 6605 1797 6608 1795 6613

$$

DS
826 
WGCA72 TJSJ 010244
FFSSJU

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN JUAN PR
1044 PM AST SUN JUL 31 2016

PRC015-035-057-095-109-129-151-010252-
/O.CAN.TJSJ.FF.W.0018.000000T0000Z-160801T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SAN LORENZO PR-GUAYAMA PR-ARROYO PR-PATILLAS PR-YABUCOA PR-
MAUNABO PR-CAYEY PR-
1044 PM AST SUN JUL 31 2016

...THE FLASH FLOOD WARNING FOR SAN LORENZO...GUAYAMA...ARROYO...
PATILLAS...YABUCOA...MAUNABO 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.

A FLOOD WARNING FOR RIO GUAYANES WILL BE ISSUED SHORTLY AS IT
CONTINUES OUT OF ITS BANKS.

LAT...LON 1805 6617 1805 6620 1812 6623 1814 6622
      1813 6613 1816 6609 1811 6605 1815 6602
      1815 6597 1812 6593 1812 6585 1810 6585
      1807 6580 1805 6584 1801 6583 1797 6592
      1798 6602 1795 6605 1797 6608 1795 6613

$$

SNELL

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.

IssuedProductOfficeCountiesLasted
Jul 30, 8:53 PM CDTSmall Craft AdvisoryJSJ54 hr
Jul 31, 3:54 AM CDTRip Current StatementJSJ47 hr
Jul 31, 3:54 AM CDTHigh Surf AdvisoryJSJ6 hr
Jul 31, 4:45 AM CDTSpecial Marine WarningJSJ90 min
Jul 31, 8:23 AM CDTSpecial Weather StatementJSJ52 min
Jul 31, 8:52 AM CDTSpecial Weather StatementJSJ53 min
Jul 31, 10:57 AM CDTSpecial Weather StatementJSJ48 min
Jul 31, 11:24 AM CDTSpecial Weather StatementJSJ36 min
Jul 31, 11:35 AM CDTSpecial Weather StatementJSJ25 min
Jul 31, 11:47 AM CDTSpecial Weather StatementJSJ43 min
Jul 31, 11:51 AM CDTSpecial Marine WarningJSJ84 min
Jul 31, 11:51 AM CDTSpecial Weather StatementJSJ69 min
Jul 31, 12:39 PM CDTSpecial Weather StatementJSJ3 hr
Jul 31, 3:34 PM CDTSpecial Weather StatementJSJ41 min
Jul 31, 4:48 PM CDTSpecial Weather StatementJSJ42 min
Jul 31, 6:12 PM CDTSpecial Weather StatementJSJ48 min

Nearby

Flash Flood Warnings in Puerto Rico, 2016Every 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.