Mammoth Mountain Weather Forecast & Discussion

December, 27th 2022 @ 11:34 AM – Mammoth Mountain is currently getting hammered with heavy wet base snow across the entire hill at this time. At the 9000-foot level storm totals are at 14 inches with over 2.16 inches of water content in the newly fallen snow.

Snow levels have not gone above 8500 feet so Yahoo the rain big rainfall event is a bust! Just talked to Jon G who drove up from Bishop and he reported it started snowing at the Mammoth Visitors Center at 7900 feet.

If you’re out on the hill today you can expect moderate to heavy snowfall above the 8500-foot level with snow mixed with rain below that level.

Areas above the 9000-foot level could see 15-30+ inches of new heavy base snow by Wednesday morning. It all depends on the snow levels and how they actually pan out during the next 24 hours.

Looking at the moisture feed, unlike the last system this one has been favoring Mammoth Mountain with a direct hit and perfect SW flow for great orographic lift. That always means el dump out on the hill.

For Wednesday there will be a break in the action and you can expect pt sunny skies over the entire Eastern Sierra and Mammoth Mountain. I would be ready to deal with deep heavy wet snow out on the hill. Go wide or stay on the groomers…

For Thursday and Friday look for snow to be light to moderate at times with an additional 5-10 inches of heavier wet snow during that time frame.

The next large plume of moisture is showing up on the models for this weekend. That system if it comes in as forecast could have excessive snowfall rates and along with the wind, not much will run on Mammoth Mountain.

The fine details are still unclear when that weather system will move out, but it does look like by mid-day on New Year’s Day that low will have passed thru the area.

The Long Range Fantasy forecast calls for another possibly large system around Tuesday of next week. The 10-day snowfall forecast from the last ECM run was around 150 inches.

Snowman