Projected rainfall totals for Mariposa: 0.25" to 0.50"
Projected rainfall totals for Oakhurst: 0.25" to 0.50"
Projected rainfall totals for Yosemite Valley: 0.50" to 1.00"
December 13, 2019 - The National Weather Service Hanford Office reports a storm system will bring rain and mountain snow to parts of the Central California Interior Friday morning through Saturday morning.
Snow will fall generally above 7000 feet.
Area Forecast Discussion National Weather Service Hanford CA 154 AM PST Fri Dec 13 2019 SYNOPSIS... A disturbance will bring mountain snow today and tomorrow for the northern portion of the Southern Sierra Nevada. A second disturbance will usher in cooler air, light precip, and gusty desert winds Saturday night through Sunday. Ridging Monday and Tuesday will keep weather quiet before another possible storm system impacts Central California mid week next week. && .DISCUSSION... Latest Goes 17 satellite nighttime imagery reveals patchy areas of dense fog in the western portion of the San Joaquin Valley early this morning as the ridge of high pressure that has been over us the last few days begins to shift south. CHP reports of car accidents and local web cams reveal low visibility in fog, so have issued a Dense Fog Advisory until 10 AM for the western portion of the San Joaquin Valley. Upper level model progs show a disturbance beginning to impact Yosemite NP by 10 AM this morning. This disturbance will bring high elevation snow to the Sierra Nevada today and tomorrow, with snowfall totals of 4-8 inches of snow possible above 7000 feet through 10 AM Saturday morning, with local amounts of 10-12 inches possible along the crests. A Winter Weather Advisory remains in effect through 10 AM Saturday for the Southern Sierra Nevada above 7000 feet for Florence Lake and northward. In the SJ Valley, precipitation is expected to spread southward Friday night into Saturday morning, but accumulations look to be very light, with QPF totals only around 0.1". Another disturbance will move inland bringing cooler air, light precip, and gusty winds through and below the Kern County Mountain Passes. Snow levels will fall to 3500-4000 feet by Sunday, but this system will but cut-off from a rich moisture source, so QPF totals will be scant. The winds in the Kern Co Desert will probably be near or at Advisory level by Saturday afternoon/evening, which may make travel difficult for high profile vehicles. Monday and Tuesday look to have calm weather as models build a ridge of a high pressure aloft above Central California. Another disturbance looks to be aimed at us by mid week next week, however, there is significant disagreement on the timing of the next trough. The EC ensemble is slower and farther south than the GEFS with this system, so the impacts of this trough are uncertain as of this writing. Details will be ironed out in the coming days.Source: NWS