Alert archive / U.S. Virgin Islands / Flash Flood Warnings in 2026

Flash Flood Warning 13, NWS JSJ

April 13, 2026

NWS JSJ issued this flash flood warning at Apr 13, 2026, 8:32 AM 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: Apr 13, 2026, 8:32 AM CDT (13:32 UTC)
Expired: Apr 13, 2026, 12:50 PM CDT
In force: 4 hr
Issued by: NWS JSJ
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

The radar

The San Juan radar (TJUA), 125 km from the middle of the area, began a volume at 13:32 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.

552 
WGCA52 TJSJ 131332
FFWSJU
VIC030-131630-
/O.NEW.TJSJ.FF.W.0013.260413T1332Z-260413T1630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service San Juan PR
932 AM AST Mon Apr 13 2026

The National Weather Service in San Juan has issued a

* Flash Flood Warning for...
  Saint Thomas in Virgin Islands...

* Until 1230 PM AST.

* At 932 AM AST, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 1.5 inches of 
  rain have fallen. Additional rainfall amounts of 1 to 3 inches are 
  possible in the warned area. Flash flooding is ongoing or expected 
  to begin shortly.

  HAZARD...Life threatening flash flooding. Thunderstorms
           producing flash flooding.

  SOURCE...Radar.

  IMPACT...Life threatening flash flooding of creeks and streams,
           urban areas, highways, streets and underpasses.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Please report observed flooding to local emergency services or law 
enforcement and request they pass this information to the National 
Weather Service when you can do so safely.

&&

LAT...LON 1838 6495 1837 6492 1833 6484 1832 6485
      1832 6483 1831 6485 1832 6488 1830 6488
      1832 6492 1834 6493 1832 6496 1835 6499
      1835 6504

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

CVB

2 follow-up statements

790 
WGCA52 TJSJ 131614
FFWSJU
VIC030-131800-
/O.EXT.TJSJ.FF.W.0013.000000T0000Z-260413T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service San Juan PR
1214 PM AST Mon Apr 13 2026

The National Weather Service in San Juan has extended the

* Flash Flood Warning for...
  Saint Thomas in Virgin Islands...

* Until 200 PM AST.

* At 1214 PM AST, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 3 inches of rain 
  have fallen. Additional rainfall amounts of 1 to 2 inches are 
  possible in the warned area. Flash flooding is ongoing or expected 
  to begin shortly.

  HAZARD...Life threatening flash flooding. Thunderstorms
           producing flash flooding.

  SOURCE...Radar.

  IMPACT...Life threatening flash flooding of creeks and streams,
           urban areas, highways, streets and underpasses.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Please report observed flooding to local emergency services or law 
enforcement and request they pass this information to the National 
Weather Service when you can do so safely.

&&

LAT...LON 1838 6495 1837 6492 1833 6484 1832 6485
      1832 6483 1831 6485 1832 6488 1830 6488
      1832 6492 1834 6493 1832 6496 1835 6499
      1835 6504

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

CVB

974 
WGCA72 TJSJ 131750
FFSSJU

Flash Flood Statement
National Weather Service San Juan PR
150 PM AST Mon Apr 13 2026

VIC030-131800-
/O.CAN.TJSJ.FF.W.0013.000000T0000Z-260413T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Saint Thomas VI-
150 PM AST Mon Apr 13 2026

...FLASH FLOOD WARNING IS CANCELLED FOR SAINT THOMAS...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

A Flood Watch remains in effect until 800 AM AST Wednesday for 
portions of Puerto Rico and Virgin Islands.

&&

LAT...LON 1838 6495 1837 6492 1833 6484 1832 6485
      1832 6483 1831 6485 1832 6488 1830 6488
      1832 6492 1834 6493 1832 6496 1835 6499
      1835 6504

$$

CVB

The office that day

Everything else NWS JSJ issued on the same UTC day.

Issued	Product	Office	Lasted
Apr 13, 8:05 AM CDT	Areal Flood Advisory	JSJ	100 min
Apr 13, 9:45 AM CDT	Flash Flood Warning Considerable damage threat	JSJ	2 hr
Apr 13, 11:15 AM CDT	Areal Flood Advisory	JSJ	30 min
Apr 13, 11:45 AM CDT	Flash Flood Warning Considerable damage threat	JSJ	2 hr
Apr 13, 12:13 PM CDT	Areal Flood Advisory	JSJ	2 hr
Apr 13, 1:48 PM CDT	Areal Flood Advisory	JSJ	2 hr

Nearby

Flash Flood Warnings in U.S. Virgin Islands, 2026 Every flash flood warning in 2026

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.