Mariposa, Oakhurst and Yosemite Valley Low Temps in the 20's!
February 1, 2020 - The National Weather Service Hanford Office reports a cooler air mass settling into central California after Sunday’s storm will introduce much colder morning low temperatures for Central California.
Areas of frost can be expected over much of the San Joaquin Valley early Monday, Tuesday, and Wednesday morning as lows may dip near or below freezing, especially on Tuesday and Wednesday.
Area Forecast Discussion National Weather Service Hanford CA 348 AM PST Sat Feb 1 2020 .SYNOPSIS... Dry conditions and above normal temperatures through Saturday. A Pacific storm brings windy and much cooler conditions Sunday. Light precipitation is expected Sunday afternoon and night, mainly over the foothills and mountains. Dry conditions expected throughout much of next week. && .DISCUSSION... Patchy fog forming in parts of the San Joaquin Valley this morning. Satellite images show the thicker fog along the low lying areas of the San Joaquin and King Rivers. A ridge of high pressure will continue to dominate central CA today with above normal temperatures and dry conditions. Maximum temperatures are forecast to be around 8-12 degrees above normal. Think some patchy fog will form again tonight with favorable radiational cooling conditions before the next weather system. Any fog in the valley should lift into low stratus Sunday morning with a stronger onshore flow and wind mixing. The next weather system moving through central CA Sunday is a positive tilted upper trough moving onshore through north CA. The system will be cold but be limited with moisture. The trough will move east into the Great Basin on Sunday night. The system will be a fast moving and moisture starved, so precipitation will be mainly light and mostly confined to the mountains. Rainfall amounts are only 0.1" to 0.2" liquid in the Sierra which translates to 1-3 inches of snowfall. While snow amounts will be light, there is potential for some winter hazards in the Kern County Mountains late Sunday night as snow levels will lower to pass levels. The more significant impact from this system will likely be from strong gusty winds. Onshore wind flow will be on the increase by mid-day Sunday as the surface pressure gradient ramps up. A Wind Advisory has been issued for the West Side Hills and most of the SJ Valley from Noon to 10 PM Sunday. Upper level winds near 90kts turn NW behind the trough Sunday evening. The wind direction will be cross mountain flow over the Tehachapis, thus high winds will possible especially below the mountain passes Sunday evening in parts of the Kern County Mountains and Desert. A High Wind Watch has been issued for this area from Sunday afternoon through Monday morning. The system will bring, a cold air mass over central CA Monday and continue to provide a cold north wind flow across central CA through Tuesday. Near freezing temperatures may be possible in parts of the SJ Valley Monday morning. Freezing temperatures will be more likely Tuesday and wednesday mornings with forecast lows in the upper 20s in portions of the valley. A warm and dry trend develops for the end of the week as an Epac ridge builds back over the west.
Source: NWS
