Pattern change underway with first system to bring light to moderate amounts to the high country tonight…..then major storm for the weekend into next week!
Tuesday December 14, 2010
Posted at 9:10 am by Howard
After a small storm tonight…… (3 to 6 inches in the village) and 6 to 12 inches over the crest….
The long awaited shift from dry weather to wet will arrive Friday as a strong upper jet coming off Asia will have the effect of displacing the dateline upper ridge far enough east to get the central west coast and California wet again. The big emphasizes is on the REX configuration of the central pacific upper ridge where the upper low south of the ridge will provide for some pretty rich juice to be entrained into the west coast trof, beginning Friday night into Sunday. Looking at the precipitate water loop, there are some PWA areas west of Hawaii up to 1.75 out there that will head for the central west coast this weekend. High moisture flux and upslope conditions along the frontal boundary should support heavy snow from the Central Sierra north. HPC QPF has 5+ inches for the crest by Sunday. It should also be noted that 1000mb/500mb thicknesses are between 558dm and 564dm. So this will be definitely be Sierra Cement over the upper elevations this weekend and could possibly be rain at times in the town of Mammoth. The Dweebs will fine tune snow levels later this week. The models keep changing on the idea on the amount of rain we will have in town. A good look at the Oakland sounding Friday afternoon should help. Hopefully, Cylke’s micro-physical processes will come to the rescue!
Next week continues to be wet with snow over the upper elevations…..The Dweebs will have to keep a weary eye on the subtropical ridge over the Rockies to see when everything shifts back to the north. Will it be Mid week or as late as Christmas?
Dr Howard and the Dweebs…………………..:-)
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