![]() It’s shaping up to be a hot and stormy weekend along the California-Nevada border, with many parks and local authorities likely to issue updates on conditions and closures. The National Weather Service issued a flood watch for most of the range through Monday morning, meaning conditions around waterways will be at an elevated risk for flooding. This includes the Walker, West Fork and Merced rivers. Large portions of the snowpack are likely to melt into a slushy mess along some of the hot spots, including streams, rivers and lakes along the foothills of the Sierra. This will raise chances for rain and thunderstorm across most of the snowpack.Ī ridge of high pressure will raise temperatures over the weekend while providing clockwise flow that could kick off thunderstorms in the afternoons. Weather models expect the hot air overhead - which is forecast to run 15 to degrees warmer than average for the Sierra - to mix with the approaching moisture. Instead, the Sierra Nevada will act like an atmospheric net, capturing that moisture. This moisture won’t make it to the coast, meaning residents in the Bay Area and along the California coastline won’t deal with the same levels of humidity from earlier this month. That same system will also reel in another round of monsoon-like moisture toward California. Warm temperatures will spread across the mountains as a high-pressure system circulates air clockwise over Nevada. This warmth is set to continue to build across the Sierra this weekend, with temperatures reaching the upper 70s across most of the range, while resorts in summits above 7,000 feet above sea level might even reach the upper 60s - including resorts like Kirkwood and the Palisades. For many residents in the Central Valley, the past couple of weeks have been chock-full of daytime temperatures in the 90s, while temperatures in Yosemite and Tahoe have steadily risen into the 60s and 70s.
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