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.

Climate:

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.

Weak Low Pressure West of Santa Barbara and upper ridge of high pressure over west NV Through Northern CA is Transporting Monsoon Moisture Northward through Central CA…..Increasing potential of rain this weekend….

The interaction between the upper low off shore and deep subtropical moisture will increase dynamics this weekend and the threat of wetting thunderstorm’s across the Mono County area, mainly Friday through Sunday AM. This mornings guidance showed a VT max or easterly wave coming out of AZ into SE CA. Showers and thunderstorm’s were developing with this circulation. This system will increase the threat of precipitation for the Owens Valley later today and tonight. This organized band may produce heavy rain.   The band weakens after midnight tonight but may still produce some showers after midnight for the Mono County area.

 

For the Mono County area, the odds for wetting rains will increase Friday afternoon into Saturday night……

As a note, Summertime patterns are different then Wintertime patterns as this is not a storm that moves in and moves out. Rather, there are convective parameters that are pointing toward an increasing chance of rain over the weekend. Morning cloud cover can inhibit the convective process and so that parameter will be looked at each morning as well to judge the days convective potential for the Mammoth area.

Of note, there is likely to be an upper jet that comes through this weekend to the south of us associated with the upper low off shore. This upper jet is likely to dynamically enhance lift over the sierra, sometime Saturday or Saturday night.

 

More later…………………….