Severe Flood ● Active
Flash Flood Warning issued October 19 at 1:28PM AST until October 19 at 4:15PM AST by NWS San Juan PR, United States of America
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FFWSJU
The National Weather Service in San Juan has issued a
* Flash Flood Warning for...
Northern Carolina in Puerto Rico...
Northern Guaynabo in Puerto Rico...
San Juan in Puerto Rico...
Trujillo Alto in Puerto Rico...
* Until 415 PM AST.
* At 128 PM AST, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2 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...Flash flooding caused by thunderstorms.
SOURCE...Radar indicated.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Measurements
| Coordinates | 18.4027, -66.0647 |
|---|---|
| Region | Carolina, PR; Guaynabo, PR; San Juan, PR; Trujillo Alto, PR |
| Location Precision | polygon |
| Issuing Authority | United States of America — us-noaa-nws-en |
| Cap Urgency | Immediate |
| Cap Certainty | Likely |
| Cap Expires | 2026-10-19T16:15:00-04:00 |
Official source
Warnings courtesy of the issuing national meteorological service, via the WMO Alert Hub.
This is an official warning issued by the authority named above. Follow its instructions and those of your local emergency services.
Severity as published by WMO Alert Hub (national weather services).
View original reportAlso reported by: NWS
This event as JSON · API and licence
Source updated 1 hour ago (Oct 19, 2026 17:29 UTC) · we last heard from WMO Alert Hub (national weather services) 49 seconds ago
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Satellite view, before and after
The latest clear Sentinel-2 pass before this event and the earliest one after it.
18 Oct 2026, the day before this event. 26.6% cloud across the tile.
No clear pass yet. Sentinel-2 revisits every few days and cloud can hide a place for longer — this event is less than a day old, and a clear scene will appear here once one exists.
The white ring marks where the event was reported.
Each image is a preview of a whole Sentinel-2 tile — an area of roughly 110 by 110 km, where one pixel is about 320 metres — not a close-up of the event, which may be a small part of it. "Clear" means under 30% cloud across the entire tile, so the exact place that matters can still be hidden. These are pictures for context, not an assessment of damage.
Contains modified Copernicus Sentinel data 2026, found through the Earth Search catalogue (Element 84) and served from the AWS Open Data Sentinel-2 archive.
Official authorities in United States
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More for United States →What to do
Follow the instructions issued by WMO Alert Hub (national weather services) and your local emergency services. The guidance below is background.
Flood preparation, evacuation decisions, and the dangers of driving or walking through floodwater.
Open Flood Safety Guide →Earlier flood events in United States
Severe and extreme events of the same kind, before this one. Listed for scale, not because they are connected to it.
Nearby & related events
Disclaimer: figures are automatic feeds from the named agencies and may be revised. Do not use this page for life-safety decisions — follow official local emergency services.