Projected rainfall totals for Mariposa: 0.50" to 1.00"
Projected rainfall totals for Oakhurst: 0.50" to 1.00"
Projected rainfall totals for Yosemite Valley: 0.50" to 1.00"
December 13, 2020 - The National Weather Service Hanford Office reports rain and higher elevation snowfall will impact Central California during this morning until Monday.
For Fresno County northward, expect general snowfall amounts of 3 to 8 inches, with locally higher amounts around 10 inches are possible above 6,000 feet by Monday morning.
Lesser snow amounts are likely south of Fresno County, or around 1 to 3 inches.
Rainfall totals of 0.10” to 0.25” are possible in portions of the San Joaquin Valley.
Precipitation totals of 0.25” to 1.00” are possible in the Sierra foothills, as well as in the higher elevations of the Sierra Nevada through late Monday morning.
Area Forecast Discussion National Weather Service Hanford CA 409 AM PST Sun Dec 13 2020 .SYNOPSIS... A storm system will move through the area today into early Monday morning, bringing rain to the valley and accumulating snow to the Sierra above 6,500 feet. Weak ridging will move into the region on Tuesday and Wednesday with a slight increase in temperatures. Another system will impact the region on Thursday, followed by clearing conditions by the weekend. .DISCUSSION...Current Nighttime Microphysics satellite imagery is showing a fair amount of mid to upper level cloud cover across the Central California interior, along with low stratus covering much of the SJV. For this reason, I am not expecting any widespread dense fog across the valley this morning. Some areas that have seen some clearing are in Kern county as well as the eastern portions of the valley. Patchy fog development is possible in these areas by day break. A storm system is still poised to move into the region today. Rain will move into the Merced area by late morning. Showers will then move into the southern end of the valley by the afternoon and early evening hours. Rainfall amounts in the valley for this system will range from 0.10-0.25" in Merced county and the eastern portions of the SJV. Between nothing to 0.10" is possible in the western SJV and Kern County where the rain shadow effect will be more pronounced. Heavy rain and snow above 6,500 feet is likely today in the Sierra, with precipitation reaching the Yosemite area by late morning. Rain and snow will then move south into Fresno, and eventually into Sequoia National Forest by the afternoon. A Winter Weather Advisory will go into effect for the central Sierra this morning and will continue into Monday morning. Total snow amounts of up to 10" are possible, with lesser amounts as you go south into Fresno/Tulare county mountains. Precipitation totals in the mountains will generally bebetween 0.50-1.0" to locally 1.5" for areas north of Fresno county into Yosemite. Between 0.50-1.0" is possible from Fresno county south into Sequoia National Forest. Precipitation amounts for the central Sierra foothills will range from 0.50" to locally 1.0", with decreasing amounts as you go south into the Kern/Tulare County foothills. The Kern County mountains will see between 0.10-0.25", with no precipitation in the desert. The area will clear out for Monday with the exception of the Kern County foothills and mountains where northwesterly flow will push low clouds/stratus and drizzle for most of Monday. Weak ridging will move into the region on Tuesday into late Wednesday, with a slight increase in afternoon temperatures. With all the recent rain and clear nights, fog developing will be possible during Tuesday and Wednesday mornings. Models are better agreement with a trough digging south into the central Great Basin by Thursday. This will mean another round of snow for the Sierra and rain for the valley. Ridging sets up for Friday and Saturday, with fog possible in the valley both mornings.
Source: NWS
