Sierra to Get Pounded Again Today with Heavy Snowfall this Afternoon and Night…..Another 2 to 3 feet is expected over the Crest by Midnight Tonight.
Sunday December 23, 2012
Posted at 7:32 am by Howard
Sunday Morning Update….Mammoth Mountain reports a storm total of 2 feet so far with the storms grand finale hitting this afternoon and night……Another 2 to 3 feet possible!
Winds are on the increase again after about 7 hours without much measurable precipitation. SFO Radar showing precipitation increasing again from the west and it will not be long before it reaches Mono County.
Overall…forecast models and Satellite verification shows a deep broad upper low along and off the pacific Northwest coast. This will bring another short wave with heavy snowfall for the Eastern Sierra today and tonight. Strong upper divergence and low level convergence along with a high level of moisture flux between 5000 feet and 10,000 feet will result in another period of heavy snowfall this afternoon and into tonight. Associated with this couplet…..the total precipitable water loop shows another Atmospheric River “AR”, off the California coast that will be drawn into the Sierra ahead of the main trof axis today. PW’s are about an inch…thus a period of heavy snowfall is expected later today and tonight with amounts in the 3 foot range over the Sierra Crest and local amounts in the 18 to 24 inch range at the Village at Mammoth over the next 12 hours…..(The heaviest snowfall period will be between 10:00am and 10:00pm tonight)
Outlook for Christmas Day:
Contrary to earlier thinking the next weather system is moving quicker than earlier expectations. Light snowfall will develop again by Tuesday early afternoon and become Moderate to Heavy overnight into Early Wednesday. Although this is not nearly the power house we have working at the moment….this storm will drop another 6 to 12 in town and 1 to 2 feet over the Crest by Late Wednesday.
Dr Howard and the Dweebs……………………………….:-)