At 314 PM PDT /314 PM MST/, a severe thunderstorm was located over
Desert Hills, or near Lake Havasu City, moving northeast at 5 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.

Locations impacted include...
Lake Havasu City and Desert Hills.

Seek shelter inside a well-built structure and stay away from
windows. This storm is capable of producing damaging winds and large
hail.

If on or near Lake Havasu, get away from the water and move indoors
or inside a vehicle. Remember, lightning can strike out to 15 miles
from the parent thunderstorm. If you can hear thunder, you are close
enough to be struck by lightning. Move to safe shelter now! Do not be
caught on the water in a thunderstorm.

At 321 PM PDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Up to 1.5 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...
Searchlight, Cal-Nev-Ari, Cottonwood Cove Campground and Cottonwood
Cove.

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

* WHAT...Flooding caused by excessive rainfall is expected.

* WHERE...A portion of Southwest California, including the following
county, San Bernardino.

* WHEN...Until 440 PM PDT.

* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Rises in small streams and normally dry arroyos.

* ADDITIONAL DETAILS...
- At 242 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 0.75 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...
Eastern Lucerne Valley and northern Johnson Valley.
- https://www.weather.gov/safety/flood

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

Remain alert for flooding even in locations not receiving rain.
Arroyos, streams, and rivers can become raging killer currents in a
matter of minutes, even from distant rainfall.