Severe Weather and Dust Storm Warnings Hit Southwest and Northern California

The dust storm warning covered a broader list of communities—including Martinez Lake, Fortuna Foothills, Algodones Dunes, Andrade and Winterhaven—and portions of Arizona and California interstates 8, as well as Arizona Route 95.
The National Weather Service advised drivers caught in the dust to pull off the road, turn off their lights and avoid using the brake, because dust can reduce visibility to near zero.
The Lake Havasu-area thunderstorm was reported 7 miles northeast of Earp and moving north at 20 mph; the warning also included Three Dunes Campground, Black Meadow Landing Campground, Cattail Cove State Park and Big River.
The Mendocino-Trinity storm was located 15 miles northwest of Covelo and moving southwest at 10 mph, with the National Weather Service warning that vegetation damage was expected.
The Siskiyou County storm was reported 7 miles northwest of the Highway 97 Grass Lake and Mount Hebron area, or 18 miles east of Yreka, and residents were told to move to an interior room on the lowest floor of a building.
The Southwest braced for dangerous weather on Wednesday, September 16, as the National Weather Service issued multiple severe warnings across Arizona, California and Nevada. A dust storm with visibility near zero threatened Arizona's Imperial County and nearby highways until 6:45 p.m., while separate thunderstorm warnings brought quarter-sized hail and 60 mph winds to Lake Havasu City and Northern California mountain areas. National Weather Service urged residents to shelter indoors and drivers to pull over immediately if caught in the dust.
A massive wall of dust raced west across Imperial and Yuma counties at 35 mph, threatening to reduce visibility to near zero on Interstate 8 and Arizona Route 95 National Weather Service. The warning, issued at 5:47 p.m., remained in effect until 6:45 p.m. Wednesday. Affected communities included Martinez Lake, Fortuna Foothills, Algodones Dunes, Andrade and Winterhaven. National Weather Service advised drivers to immediately pull off the road, turn off lights and avoid using brakes when trapped in the dust.
A severe thunderstorm warning covered Lake Havasu City, Parker Dam and nearby areas until 6:30 p.m., with quarter-sized hail and wind gusts reaching 60 mph National Weather Service. The storm, reported 7 miles northeast of Earp, moved north at 20 mph and threatened to damage vehicles, roofs, siding and trees. The warning also included Three Dunes Campground, Black Meadow Landing Campground, Cattail Cove State Park and Big River. Officials advised residents to seek shelter in sturdy buildings away from windows.
Separate severe warnings blanketed remote Northern California areas on Wednesday evening. A storm 15 miles northwest of Covelo in Mendocino and Trinity counties moved southwest at 10 mph, bringing large hail and vegetation damage until 6:15 p.m. National Weather Service. A second warning covered Siskiyou County until 6 p.m., affecting the area 18 miles east of Yreka near Highway 97. National Weather Service warned residents to move to interior rooms on the lowest floor and remain indoors for 30 minutes after the last thunder or lightning.
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