Flash Flood Warning 21, NWS JSJ

Issued

Jul 30, 2020, 3:02 PM CDT (20:02 UTC)

Expired

Jul 30, 2020, 6:00 PM CDT

In force

3 hr

Issued by

NWS JSJ

Area

Storm-based polygon

Flood severity

None

The San Juan radar (TJUA), 18 km from the middle of the area, began a volume at 20:02 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.

893 
WGCA52 TJSJ 302002
FFWSJU
PRC025-063-069-077-085-129-151-302300-
/O.NEW.TJSJ.FF.W.0021.200730T2002Z-200730T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service San Juan PR
402 PM AST Thu Jul 30 2020

The National Weather Service in San Juan has issued a

* Flash Flood Warning for...
  Humacao Municipality in Puerto Rico...
  Gurabo Municipality in Puerto Rico...
  Yabucoa Municipality in Puerto Rico...
  Caguas Municipality in Puerto Rico...
  Juncos Municipality in Puerto Rico...
  Las Piedras Municipality in Puerto Rico...
  San Lorenzo Municipality in Puerto Rico...

* Until 700 PM AST

* At 359 PM AST, Moderate to heavy rainfall is expected to move 
  across the warning area shortly. This rainfall in addition to 
  excessive runoff from previous rains will continue to result in 
  Flash Flooding across these municipalities.  

  HAZARD...Flash flooding caused by moderate to heavy rain and 
           excessive runoff. 

  SOURCE...Radar indicated. 

  IMPACT...Flooding of small creeks and streams, urban areas, 
           highways, streets and underpasses as well as other 
           drainage and low lying areas. 

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...

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

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 1825 6588 1827 6583 1820 6583 1820 6577
      1818 6576 1817 6574 1815 6577 1806 6580
      1805 6584 1801 6583 1807 6601 1810 6601
      1812 6606 1815 6607 1817 6610 1821 6612
      1823 6609 1830 6606 1831 6597

FLASH FLOOD...RADAR INDICATED

$$

oms

846 
WGCA72 TJSJ 302306
FFSSJU

Flash Flood Statement
National Weather Service San Juan PR
706 PM AST Thu Jul 30 2020

PRC025-063-069-077-085-129-151-302308-
/O.EXP.TJSJ.FF.W.0021.000000T0000Z-200730T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Humacao PR-Gurabo PR-Yabucoa PR-Caguas PR-Juncos PR-Las Piedras PR-
San Lorenzo PR-
706 PM AST Thu Jul 30 2020

...THE FLASH FLOOD WARNING FOR HUMACAO...GURABO...YABUCOA...CAGUAS...
JUNCOS...LAS PIEDRAS AND SAN LORENZO MUNICIPALITIES WILL EXPIRE AT
700 PM AST...

The heavy rain has ended. Flood waters continue to steadily recede. 
No heavy additional rains is expected at this time. Therefore Flash 
Flooding is no longer expected to pose a threat. However, please 
continue to heed to any road closures and stay away from swollen 
rivers and streams, as excessive runoff will continue. For this 
reason flooding along rivers and their tributaries in this area will 
continue. 

LAT...LON 1825 6588 1827 6583 1820 6583 1820 6577
      1818 6576 1817 6574 1815 6577 1806 6580
      1805 6584 1801 6583 1807 6601 1810 6601
      1812 6606 1815 6607 1817 6610 1821 6612
      1823 6609 1830 6606 1831 6597

$$

RAM

Flash Flood Warnings in Puerto Rico, 2020Every flash flood warning in 2020

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.