Flash Flood Warning — Riverside County, California
Flooding is imminent or already occurring. Move to higher ground immediately — never drive through flooded roads.
Current Status
🌊 Active: Flash Flood Warning
Flash Flood Warning issued August 11 at 1:54PM PDT until August 11 at 4:00PM PDT by NWS San Diego CA
FFWSGX The National Weather Service in San Diego has issued a * Flash Flood Warning for... Extreme Southeastern Riverside County in southern California... Extreme Northeastern San Diego County in southwestern California... * Until 400 PM PDT. * At 154 PM PDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. The expected rainfall rate is 1 to 2 inches in 1 hour. Flash flooding is ongoing or expected to begin shortly. HAZARD...Life threatening flash flooding. Thunderstorms producing flash flooding. SOURCE...Radar indicated. IMPACT...Life threatening flash flooding of creeks and streams, urban areas, highways, streets and underpasses. * Some locations that will experience flash flooding include... Thermal and Santa Rosa Mountain. Flood waters can surge through normally dry washes, far away from ongoing thunderstorm activity. Be aware of rapidly rising waters even outside of heavy rain and thunderstorms.
Effective August 11, 2026 at 4:54 PM ET · Expires August 11, 2026 at 7:00 PM ET
Event Details
Event Type
Flash Flood Warning
Severity
severe
Issued By
NWS San Diego CA
Expires
August 11, 2026 at 7:00 PM ET
Last Checked
56 minutes ago
What To Do
📋 Official NWS Guidance
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.
Other Active Alerts in California
Severe Thunderstorm Warning
Flash Flood Warning
Flood Advisory
Flash Flood Warning
Flood Advisory
Flood Advisory
Get Flash Flood Warning Alerts for Riverside County
StormCast checks the NWS feed continuously and pushes alerts like this directly to your phone — even with the screen off.
Frequently Asked Questions
What does a Flash Flood Warning mean for Riverside County, California?
Flooding is imminent or already occurring. Move to higher ground immediately — never drive through flooded roads.
Is this Flash Flood Warning currently active?
Yes — this alert is active as of our last check (56 minutes ago). It's set to expire August 11, 2026 at 7:00 PM ET.
How do I get notified about Flash Flood Warning alerts for Riverside County?
Download StormCast free on Google Play and set Riverside County, California as one of your monitored locations. StormCast checks the NWS feed continuously and pushes alerts like this directly to your phone — even with the screen off.