Over the past several model runs…there has been a decisive trend to split the next upper trof as it comes into Central California. Negative tilt trofs sometimes have a tendency to do this in the southern portion as the northern portion of the storm with the jet on the front side of the trof is moving along with the system while in this case…lifting NE; while the upper jet on the back side is still digging southeast! The split is over Central Ca and will directly effect the snowfall amounts over Mammoth Lakes.

It is for this reason that the Dweebs now feel that this will be a light precipitation event as the front sheers into the Mammoth portion of the Eastern Sierra. 

Best guess….

3 to 5 inches in town and 4 to 8 innches up on Mammoth Mountain by Sunday Mid-Morning.

500mb-1000mb thickness falls of 100 dm should bring some 8 to 10 degrees of cooling by Sunday. 


Winds were pretty light this morning at the main lodge. Even over the crest they were only 30mph gusting to 35.

The winds will increase and strengthen throughout the day with gusts to 60mph by the the afternoon over the crest. It will be even windier by Christmas AM…but should begin to subside a bit later in the day.

Snow will begin falling by late afternoon and then snow is likely Saturday night/Sunday am. Snow level is expected to be at 6500 feet.

Fair weather will return for Monday and Tuesday.

There appears to be a stronger storm out there for the 29th/30th that will be windier, colder and bring moderate amounts.  (About a foot+)

The Dweeber……………………….:-)

Reference Glossary of Weather Terms
Disclaimer: I have been a hobbyist meteorologist for over 30 years here in the Mammoth area and I do this for my personal enjoyment. The National Weather Service saves lives every day . . . I do not. When making important planning decisions please use information provided by the National Weather Service as they are the most knowledgeable and accurate information source available today.