Flash Flood Warning — San Diego 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 2:13PM PDT until August 11 at 5:15PM PDT by NWS San Diego CA
FFWSGX The National Weather Service in San Diego has issued a * Flash Flood Warning for... Small Portion of North Central San Diego County in southwestern California... * Until 515 PM PDT. * At 213 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... Borrego Palm Canyon and Los Coyotes Indian Reservation.
Effective August 11, 2026 at 5:13 PM ET · Expires August 11, 2026 at 8:15 PM ET
Event Details
Event Type
Flash Flood Warning
Severity
severe
Issued By
NWS San Diego CA
Expires
August 11, 2026 at 8:15 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. In hilly terrain there are hundreds of low water crossings which are potentially dangerous in heavy rain. Do not attempt to cross flooded roads. Find an alternate route.
Other Active Alerts in California
Severe Thunderstorm Warning
Flood Advisory
Flood Advisory
Flood Advisory
Flood Advisory
Flash Flood Warning
Get Flash Flood Warning Alerts for San Diego 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 San Diego 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 8:15 PM ET.
How do I get notified about Flash Flood Warning alerts for San Diego County?
Download StormCast free on Google Play and set San Diego 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.