Yosemite spring conditions

Yosemite is entering spring with a weird split-screen: the high country snow survey at Tuolumne Meadows came in at 56% of the April 1 average, but the park says Yosemite Falls, Vernal Fall, Nevada Fall, and Bridalveil Fall are all flowing high right now. (nps.gov 1) (nps.gov 2) That combination happened after a hot March across California. The California Department of Water Resources said its April 1 survey at Phillips Station found no measurable snow, after warm storms and unusually high temperatures erased much of the Sierra Nevada snowpack early. (water.ca.gov) Snowpack is the mountain’s slow-release reservoir. A deep snow year acts like an ice chest that leaks cold water for weeks, while a thin snow year melts fast, sends runoff earlier, and leaves streams lower later in summer. (water.ca.gov) (nps.gov) Yosemite’s own April survey showed how uneven this year has been. Park staff wrote that some snow courses in the Tuolumne Meadows area were nearly bare while shaded spots still held snow, which is why the month felt “interesting and challenging” even before the melt season really starts. (nps.gov) The waterfalls can still look great in a lean snow year because timing matters as much as total volume. The National Park Service says spring is the best time to see Yosemite waterfalls, with peak runoff usually arriving in May or June before some falls shrink to a trickle or dry up by August. (nps.gov) That is why visitors are getting the postcard version of Yosemite right now even with a weak snow outlook. The Mist Trail to Vernal Fall is famous for heavy spray in spring and early summer, and the park warns that the granite steps and riverside rocks get dangerously slippery when flows are strong. (nps.gov 1) (nps.gov 2) Wildflowers follow the same elevation ladder that water does. The park says Yosemite spans about 11,000 feet of elevation, so flowers start low in the foothills first and then move uphill as the season warms. (nps.gov) That makes spring one of the easiest windows to catch two different Yosemites in one trip. Lower, warmer areas can be blooming while Yosemite Valley is still in peak waterfall mode and the high country is only beginning to thaw. (nps.gov 1) (nps.gov 2) The catch is that a low-snow spring usually pulls the calendar forward. Earlier melt can mean greener meadows and louder rivers in April and May, but a shorter runway for cold water, smaller late-season flows, and a landscape that dries out faster as summer heat arrives. (nps.gov) (water.ca.gov) So the Yosemite story this week is not “bad year” or “good year.” It is that the park is in the brief overlap when thin snowpack, strong falls, fresh grass, and early blooms can all be true at once. (nps.gov) (nps.gov)