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Elev 373 ft, 34.1 °N, 117.58 °W

Rancho Cucamonga, CA Severe Weather Alertstar_ratehome

icon73 Â°F Rancho Cucamonga Station|Report|Change
Current Station
Personal Weather Station
Location: Rancho Cucamonga, CA
Elevation: 373ft
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Active Weather Alerts

Flash Flood Warning
Issued: 1:51 AM Sep. 17, 2026 – National Weather Service
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 930 PM PDT /930 PM
MST/ THIS EVENING FOR SOUTH CENTRAL MOHAVE AND SAN BERNARDINO
COUNTIES...

At 651 PM PDT /651 PM MST/, Doppler radar indicated thunderstorms
producing heavy rain across the warned area. Between 1 and 2 inches
of rain have fallen. 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...
Lake Havasu City, Parker Dam, Alamo Lake, Cattail Cove State Park,
Black Meadow Landing Campground, Three Dunes Campground, Earp and
Big River.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&


FLASH FLOOD...RADAR INDICATED;
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

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