High temperatures moved into the low 70s in Mammoth Wednesday and will remain in the low 70s for Thursday as well. However a strong cold front will invade the Eastern Sierra Saturday morning with much cooler temperatures, rain showers to begin with then snow showers possible developing later Saturday.  Light snow showers may continue through Monday AM.  Snowfall accumulation will be light. Somewhere in the 1 to 3 inches range over upper elevations… Will fine tune this again Friday.


The Northward expansion of the Eastern Pacific Ridge supports the coming highly amplified pattern that is forecasted by all global models. they feature a strong ridge developing just west of 140W, with a long wave trof deepening as a result near 120 west.  In that the upper low is centered over land, over water trajectory is limited and precipitation will be light. However, the system is anomalously cold for this time of the year. In fact the 500mb heights sigma is some -3.5 by Saturday night over Mono County. By early next week, the upper trof  shifts east and weakens allowing temps to rise somewhat by mid week.  It will still remain quite chilly at resort levels….there is another system and cold front that will come through Thursday or Friday later next week.


BTW;  snow levels will lower Sunday and Monday to the valley floors…  But don’t expect much Snow.  Hard freeze conditions are likely beginning Sunday night into Tuesday.


Is this the end of warm fall weather?….Absolutely not.

We will have an Indian Summer!!


Dr Howard and the Dweebs……………………….:-)