Flash Flood Warning — San Bernardino 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 4:02PM PDT until August 11 at 6:30PM PDT by NWS Las Vegas NV
At 402 PM PDT, Public has reported significant flooding along I-15 near Fort Irwin Road in Barstow. Between 1.5 and 2.5 inches of rain have fallen. Additional rainfall amounts of 0.5 to 1 inch are possible in the warned area. Flash flooding is already occurring. HAZARD...Life threatening flash flooding. Thunderstorms producing flash flooding. SOURCE...Public reported flash flooding, radar indicated rainfall. IMPACT...Life threatening flash flooding of creeks and streams, urban areas, highways, streets and underpasses. Some locations that will experience flash flooding include... Daggett and Nebo Center. This includes the following highways... Interstate 15 in California between mile markers 81 and 89. Interstate 40 in California between mile markers 2 and 11.
Effective August 11, 2026 at 7:02 PM ET · Expires August 11, 2026 at 9:30 PM ET
Event Details
Event Type
Flash Flood Warning
Severity
severe
Issued By
NWS Las Vegas NV
Expires
August 11, 2026 at 9:30 PM ET
Last Checked
2 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. Please report observed flooding to local emergency services or law enforcement and request they pass this information to the National Weather Service when you can do so safely.
Other Active Alerts in California
Severe Thunderstorm Warning
Flood Advisory
Flood Advisory
Flash Flood Warning
Flood Advisory
Flood Advisory
Get Flash Flood Warning Alerts for San Bernardino County
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Frequently Asked Questions
What does a Flash Flood Warning mean for San Bernardino 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 (2 minutes ago). It's set to expire August 11, 2026 at 9:30 PM ET.
How do I get notified about Flash Flood Warning alerts for San Bernardino County?
Download StormCast free on Google Play and set San Bernardino 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.