Weakening Upper trof remains over the inter-mountain west with back side over California…..Weak Low pressure at 700MB will provide marginal instability to the sierra for a few isolated thunderstoms the next few days….Weather may become a bit more active over the weekend…..

Very light flow remains overs the Central Sierra this evening with a very weak low pressure circulation located over West Central CA at 700MB. There were plenty of high clouds today. However, little in the way of air mass modification. Looking at the Tuesday 18Z  GFS 0.5 Degree Model Output, , there appears to be a slow increase in the 250 MB upper divergence over Mono County through the weekend. At the same time, the convective available potential energy “CAPE” increases, especially over the weekend.  Air mass modification should take place Friday and Saturday with areal coverage of thunderstorms on the increase, especially Saturday and Sunday… Through the process, temperatures will rise a few more degrees this week….into the upper 70s. Lows in the 40s.

Fall like trof is a reminder that Meteorological Fall is only two weeks away……Coolest Temperatures of the Summer Monday will give way to a warm up beginning Thursday into the following weekend..

It’s a cool cloudy day today in Southern Mono County as a fall like Trof descends through the county….The Trof will be dry.  Clearing skies will occur tonight…..Highs today in Mammoth will be in the 60s then low 70s Tuesday and upper 70s by Thursday. Weekend will be fair with highs be near 80 degrees. there will be a few isolated Thunderstorms over the high country.


Of note, the subtropical continental high has disappeared to a significant extent over the desert southwest.  This is unusual for Mid August.  Some attempt for mother nature to redevelop it will occur about the 21st of August over Texas.  Monsoon moisture will pretty much disappear until the week of the 21st.

Fall may be coming on quicker than you think!


“Max” Partial Solar eclipse for Mammoth Lakes will occur at 10:20 am on Aug 21st.   About 75% of the Sun will be eclipsed by the New Moon. When viewing the sun, use “only” special glasses with the stamp ISO 12312-2 … on them.  Otherwise “you will be”  blinded by the light!


Dr Howard and the Dweebs………………………..:-)

More seasonal weather returns for Mammoth as drier air works its way into the sierra…..Isolated storms still possible through Wendesday then dry warm weather expected for the weekend…

Our air mass dried out Sunday after several days of rain.  Low pressure over Northern CA will keep a mainly dry SW flow aloft over the Eastern Sierra with only isolated showers and possible Thunderstorms through Wednesday during the late afternoon and early evening hours.  Daytime highs are season now with temperatures in the mid to upper 70s and lows in the upper 40s. The upper low over Northern CA dissipates the next weekend with higher heights returning. So the weekend of the 12th looks warmer than normal and dry with highs in the low 80s. Lows in the low 50s.