Mammoth Mountain Weather Forecast & Discussion

February 26th, 2023 @ 11:39 AM – More weather is on the way with a weaker system on tap for today and then a much stronger deep cold low will drop out of the Gulf of Alaska and will affect the area starting Monday afternoon.

The first system scheduled for this afternoon and tonight looks to bring in more moderate snowfall with 12-18 inches possible by Monday morning.

On Monday more moderate to heavy high ratio snow is forecast to fall along with extremely strong winds with gusts over 100 MPH possible up top and lower elevations wind gusts in the 20-40 MPH range.

That the mix of light snow and winds will create blizzard conditions at times from Mammoth Mountain down into Mammoth Lakes and down onto 395 all the way to Toms Places.

You can expect 395 to be closed again starting on Monday, what time that happens nobody knows for sure, but by midday, travel will be done with zero visibility expected at times.

Over the period from this afternoon into Wednesday snowfall amounts from 9000 feet and above look to be in the 3-5 foot range.

The first big break in the weather looks to occur Thursday into Friday with the following weekend in question as there is more weather in line starting around the Saturday /  Sunday time period.

That next system also is starting to look like a major snow producer as well. Since it’s a week out we will have to wait a few more days before buying into a third big snowfall event.

If you’re going to be out on the hill today, expect increasing clouds and winds leading to snow showers during the afternoon hours. Snowfall accumulations could be into the 2-4 inch range above the 9000-foot level.

Temperatures will be in the upper teens to mid-20s by noon. Winds look to be out of the SW at 15-25 MPH with gusts in the 25-50+ MPH range over higher elevations.

On Monday expect snowfall that will be moderate to heavy at times with 8-12+ inches of new snow possible.

As the winds pick up the high ratio snow will start to blow around creating blizzard conditions at times by mid-day.

Temperatures will be in the teens from the start to the finish. Winds will be out of the SW at 40 to 45 mph, with gusts as high as 65 mph, with ridge-top winds by late in the day up to 100 MPH.

On Tuesday expect more of the same with moderate to heavy snowfall at times with very windy conditions that will results in the continued blizzard warning from the NWS.


For the Powder Forecast and the Extended Outlook check out the WeatherGuys Friday Update.

NWS Forecast for the Main Lodge / 8900 Foot Level
NWS Forecast for the Main Lodge / 8900 Foot Level
NWS Forecast for Bishop @ 4100 Feet

0- 5 Day - ECMWF 500 Height Anomaly
0-5 Day ECMWF Jet Stream
Monday AR Hook Up
ENSO Outlook – Updated on February 20th

Mammoth Mountain and Eastern Sierra Weather Posts