Flood Advisory — San Diego County, California
Minor flooding is expected — not severe enough for a warning, but potentially inconvenient or hazardous for travel.
Current Status
🌊 Active: Flood Advisory
Flood Advisory issued August 15 at 4:38PM PDT until August 15 at 6:38PM PDT by NWS San Diego CA
* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...A portion of Southwest California, including the following county, San Diego. * WHEN...Until 638 PM PDT. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Rises in small streams and normally dry arroyos. Overflowing poor drainage areas. * ADDITIONAL DETAILS... - At 438 PM PDT, Doppler radar indicated heavy rain due to thunderstorms. Minor flooding is ongoing or expected to begin shortly in the advisory area. Between 0.5 and 1.25 inches of rain have fallen. - Additional rainfall amounts of 0.25 to 1 inch are expected over the area. This additional rain will result in minor flooding. - Some locations that will experience flooding include... I-8 Between Boulevard And Imperial County Line, Hwy S2 Between Canebrake And Imperial County Line and Hwy S2 Vallecito Creek Rd. - https://www.weather.gov/safety/flood
Effective August 15, 2026 at 7:38 PM ET · Expires August 15, 2026 at 9:45 PM ET
Event Details
Event Type
Flood Advisory
Severity
minor
Issued By
NWS San Diego CA
Expires
August 15, 2026 at 9:45 PM ET
Last Checked
just now
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
Flood Advisory
Flash Flood Warning
Flash Flood Warning
Flood Advisory
Severe Thunderstorm Warning
Severe Thunderstorm Warning
Get Flood Advisory 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 Flood Advisory mean for San Diego County, California?
Minor flooding is expected — not severe enough for a warning, but potentially inconvenient or hazardous for travel.
Is this Flood Advisory currently active?
Yes — this alert is active as of our last check (just now). It's set to expire August 15, 2026 at 9:45 PM ET.
How do I get notified about Flood Advisory 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.