This mornings 5 day means from the ECMWF Control Ensembles showed a ridge at 140 west and a Trof in the mean over the Great Basin. A NW flow is occurring over CA with limited moisture. Strong Mid May daytime heating will destabilize the atmosphere enough for a “few” thunderstorms over Mono County. The track of an upper low over the Great Basin today is south….Then SW over Southern CA Tuesday. This gives the southern sierra the main focus of any thunderstorms action, especially Tuesday. It will be slightly cooler today and Tuesday. Highs in the upper 50s to near 60 in Mammoth with lows near freezing.

The weather pattern according to the 00z Monday European ensembles this week shows the upper high near 140west both retrograding and amplifying. This will retrograde the upper Great Basin low westward forming a rather deep low (for this time of the year) over the far west over the weekend. This upper low has been well advertised the past 3 to 5 day for next weekend.  The Dweebs expect the upper low to be preceded by wind Thursday afternoon into Saturday AM with Snow over the upper elevations and rain or snow in town this weekend.

It is too soon to forecast any amounts of snowfall on Mammoth Mt at this time.


The long range models keep the trof in the mean over the far west or far eastern pacific for a few weeks.


Dr Howard and the Dweebs………….