Chance of Precipitation for Mariposa on Monday evening: 39% - Monday night: 32%
Chance of Precipitation for Oakhurst on Monday evening: 35% - Monday night: 34%
Chance of Precipitation for Yosemite Valley on Monday evening: 55% - Monday night: 46%
December 6, 2021 - The National Weather Service Hanford Office reports a trough of low pressure will pass through Central California Tuesday morning.
Ahead of this trough of low pressure, precipitation is likely in the Sierra Nevada Monday night, while there is a chance of light rain in the San Joaquin Valley Monday night.
Rain amounts, if any, in the San Joaquin Valley will remain below one tenth of an inch.
Two to four inches of snow is possible in the Sierra Nevada above 8,000 feet.
Area Forecast Discussion National Weather Service Hanford CA 1252 AM PST Mon Dec 6 2021 .SYNOPSIS... Light precipitation is possible tonight and Tuesday morning ahead of a trough of low pressure. A more organized storm system will be responsible for widespread precipitation across Central California Wednesday night through Thursday evening. Freezing temperatures are likely in the Kern County desert and most of the San Joaquin Valley Friday night. && .DISCUSSION... A ridge of high pressure will shift southward over Southern California today. High temperatures in Central California this afternoon will be near normal for this time of year. A trough of low pressure will move southward through Northern California tonight. This trough of low pressure will pass over Central California Tuesday morning. Precipitation amounts of up to one quarter of an inch are expected in the Sierra Nevada tonight and Tuesday morning. Two to four inches of snow is possible in the Sierra Nevada above 8,000 feet tonight and Tuesday morning. There is a slight chance of light rain in the San Joaquin Valley tonight and Tuesday morning. Precipitation amounts, if any, will remain below one tenth of an inch. Zonal flow aloft is expected Tuesday afternoon through Wednesday. An Eastern Pacific cold front will approach the coast of California Wednesday night. This cold front will move eastward through Central California Thursday. Ahead of the cold front, widespread precipitation is likely. Rain amounts will remain under one tenth of an inch in the Coastal Range and Kern County desert. Precipitation amounts of one tenth of an inch to one quarter of an inch are possible in the western portion of the San Joaquin Valley and the Kern County mountains. Rainfall of one quarter of an inch to one half of an inch is conceivable in the eastern portion of the San Joaquin Valley. Finally, below the snow line, rain amounts of one half of an inch to one inch are possible in the Sierra Nevada and adjacent foothills. Speaking of the snow line, snow levels will start at around 7,000 feet Wednesday night, before falling to about 5,000 feet Thursday afternoon. Snow amounts of 6 to 12 inches are possible in the Sierra Nevada above 7,000 feet. Snow amounts of 3 to 6 inches are conceivable in the Sierra Nevada from 5,000 feet to 7,000 feet. In wake of the aforementioned cold front, a relatively colder air mass will move into Central California Thursday night. Low temperatures Thursday night will be six to eight degrees colder than Wednesday night. High temperatures Friday afternoon will be around five degrees below normal for this time of year. Freezing temperature are probable in the Kern County desert and much of the San Joaquin Valley Friday night. Probabilities of freezing temperatures in the San Joaquin Valley Friday night are 64 percent or higher at Madera, Visalia, Hanford, Merced, Delano, and Lemoore. A Hard Freeze Watch will likely be required for the Kern County desert Friday night, while a Freeze Watch will likely be required for the San Joaquin Valley Friday night. An upward temperature trend is expected this weekend as cyclonic flow aloft transitions to anticyclonic flow. && .AVIATION... IFR to local LIFR conditions are expected in the San Joaquin Valley this morning due to stratus clouds. These stratus clouds should lift to a MVFR deck this afternoon. MVFR or lower conditions are possible in the Sierra Nevada tonight due to light precipitation ahead of a trough of low pressure. && .AIR QUALITY ISSUES... On Monday, December 6th, 2021, unhealthy for sensitive groups in Fresno and Kern Counties. Fireplace/wood stove burning status is: no burning unless registered in Kern (Greater Frazier Park Area), Kings, Madera, Merced, and Tulare Counties. No burning for all in Fresno and Kern Counties. Further information is available at Valleyair.org.
Source: NWS
