12z NAM 500MB Heights early this morning had the center of a developing continental high between Mammoth and Stockton with the Progg shifting the upper center over Eastern NV later today. Heights continue to rise as do surface temps. By around noon Friday, the center is near the NV/Utah border with 500mb heights well in excess of 594 DM. A short wave Trof pushes into Northern Ca and OR Friday night bringing a bit more Zephier to Mammoth in the late afternoon and evening. However, this feature actually build 500MB heights higher in excess of 597DM Saturday over Western Utah, then shifts it west to our Eastern CA Mono County by Late Sunday Afternoon. As an average, the upper anticyclone is mostly over NV, thus acting as a shunt from allowing the southerly flow of deep moisture from reaching the sierra. Thus the dry weather is likely to continue for quite a while.

Expect Highs in Mammoth in the mid 80s this weekend though Labor Day, lows in the low 60s.  Expect Zephier winds between 10 to 20MPH each late afternoon and evening….

The longer range for the following weekend is questionable as the models differ on how quickly the pattern actually breaks down. Latest is that the GFS has a cool Trof pushing in to the Pacific NW next Wednesday increasing Zephier winds in the high country and bringing the beginnings of a significant cool down, during the second half of next week.


Stay Tuned…..


Dr Howard and the Dweebs………………….:-)