Flash Flood Warning 34, NWS JSJ

Issued

Aug 20, 2017, 1:53 PM CDT (18:53 UTC)

Expired

Aug 20, 2017, 4:45 PM CDT

In force

3 hr

Issued by

NWS JSJ

Area

Storm-based polygon

Flood severity

None

The San Juan radar (TJUA), 11 km from the middle of the area, began a volume at 18:56 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.

025 
WGCA52 TJSJ 201853
FFWSJU
PRC015-095-109-129-151-202145-
/O.NEW.TJSJ.FF.W.0034.170820T1853Z-170820T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service San Juan PR
253 PM AST SUN AUG 20 2017

The National Weather Service in San Juan has issued a

* Flash Flood Warning for...
  Arroyo Municipality in Puerto Rico...
  Yabucoa Municipality in Puerto Rico...
  Maunabo Municipality in Puerto Rico...
  San Lorenzo Municipality in Puerto Rico...
  Patillas Municipality in Puerto Rico...

* Until 545 PM AST

* At 248 PM AST, Emergency management officials reported strong 
  thunderstorms with heavy rain across the warned area. Flash 
  flooding is already occurring.

* Some locations that will experience flooding include...
  Maunabo, Patillas, Emajagua, Palmas, Buena Vista, Palo Seco,
  Lamboglia and Yaurel.

Flood waters are moving down Rio grande de Patillas as well as 
along Rio Nigua, Rio Guayanes and their tributaries.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets and underpasses as
well as other drainage areas and low lying spots.

Stay away or be swept away. River banks and culverts can become
unstable and unsafe.

A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.

&&

LAT...LON 1812 6605 1812 6604 1813 6603 1814 6601
      1800 6589 1797 6595 1797 6599 1798 6600
      1798 6602 1797 6603 1797 6605

$$
RAM/JFR/ICP

085 
WGCA72 TJSJ 202129
FFSSJU

Flash Flood Statement
National Weather Service San Juan PR
529 PM AST SUN AUG 20 2017

PRC015-095-109-129-151-202136-
/O.CAN.TJSJ.FF.W.0034.000000T0000Z-170820T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Arroyo PR-Yabucoa PR-Maunabo PR-San Lorenzo PR-Patillas PR-
529 PM AST SUN AUG 20 2017

...THE FLASH FLOOD WARNING FOR ARROYO...YABUCOA...MAUNABO...SAN
LORENZO AND PATILLAS MUNICIPALITIES IS CANCELLED...

The heavy rain has ended. Flood waters have receded. Flooding is no 
longer expected to pose a threat. However an Urban and Small Stream 
Flooding remain in effect for this area. Please continue to heed any 
remaining road closures.

LAT...LON 1812 6605 1812 6604 1813 6603 1814 6601
      1800 6589 1797 6595 1797 6599 1798 6600
      1798 6602 1797 6603 1797 6605

$$

JFigueroa

Flash Flood Warnings in Puerto Rico, 2017Every flash flood warning in 2017

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.