Alert archive / California / Flash Flood Warnings in 2026

Flash Flood Warning 10, NWS San Diego, CA

September 28, 2026Riverside County, California

NWS San Diego, CA issued this flash flood warning at Sep 28, 2026, 9:13 PM PDT for Riverside County, California. It was in force for 3 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 28, 2026, 9:13 PM PDT (04:13 UTC)
Expired
Sep 29, 2026, 12:15 AM PDT
In force
3 hr
Issued by
NWS San Diego, CA
Area
Storm-based polygon
Flood severity
None

County Riverside County, CA

The radar

The San Diego radar (KNKX), 134 km from the middle of the area, began a volume at 04:14 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 San Diego, CA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 28, 8:57 PM PDTSpecial Weather StatementSGXRiverside33 min

Nearby

Flash Flood Warnings in California, 2026Every 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.