Alert archive / California / Flash Flood Warnings in 2025

Flash Flood Warning 18, NWS Los Angeles, CA

September 27, 2025Los Angeles County, California

NWS Los Angeles, CA issued this flash flood warning at Sep 27, 2025, 5:34 PM PDT for Los Angeles County, California. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Sep 27, 2025, 5:34 PM PDT (00:34 UTC)
Expired
Sep 27, 2025, 8:00 PM PDT
In force
2 hr
Issued by
NWS Los Angeles, CA
Area
Storm-based polygon
Damage threat
Considerable
Flood severity
None

County Los Angeles County, CA

The radar

The Santa Ana Mts radar (KSOX), 71 km from the middle of the area, began a volume at 00:38 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 office that day

Everything else NWS Los Angeles, CA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 27, 5:12 PM PDTAreal Flood AdvisoryLOXLos Angeles5 hr
Sep 27, 5:15 PM PDTSpecial Weather StatementLOXLos Angeles30 min
Sep 27, 6:36 PM PDTSpecial Weather StatementLOX9 min
Sep 27, 6:41 PM PDTAreal Flood AdvisoryLOXLos Angeles2 hr
Sep 27, 6:52 PM PDTFlash Flood WarningLOXLos Angeles68 min

Nearby

Flash Flood Warnings in California, 2025Every flash flood warning in 2025

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.