Mammoth Mountain & Eastern Sierra Weather Forecast

Recreational Weather Report for Mammoth Mountain & the Eastern Sierra

January 21st, 2022 @ 10:47 AM

Weather Overview: We have a low-pressure system to the east of Mammoth Mountain and the Eastern Sierra that is bringing in a strong NE flow to the area.

As Friday goes on wind speeds above 8000 feet will continue to increase with the strongest winds above 9500 feet. Looks like a fairly strong wind event later today into tonight.

On Saturday expect more NE winds, but they should be backing off some during the PM hours. Sunday and Monday look sunny and warmer with much less winds.

Looks like one more weaker inside slider will be around on Tuesday and then more warm calm weather for Wednesday into next Friday.

Mammoth Mountain on Hill Forecast for 9000 feet for Friday and Saturday: Highs will be down into the upper 20s to low 30s for mid-day highs.

Winds will be 30-55 MPH over the mid-Mountain with upper mountain NE winds gusting to 75-100 MPH later on Friday and into the night.

Saturday expect more strong wind gusts out of the NE with the winds decreasing during the PM hours.

Lower Elevations: Expect clear skies with north winds today and Saturday. Highs will be in the 30s for Mammoth Lakes and Crowley Lake.

Down in Bishop and Round Valleys, daytime highs will be in the mid-50s. Winds will be out of the north at 15-25 MPH.

Long Range Fantasy Outlook: The next chance for snow looks to be the last day of January into the first week of February.

Looks like the start of a new pattern, the question as always is how much snow potential is there?  As of now, we are not seeing any signs of a major storm cycle, but there could be some good refreshing snowfall during the first week of February. If the pattern sets up a bit more west there could be several feet of snow possible.

Below is the EPS ensemble model, you can see the low to our east dropping south. That system will keep the N to NE flow going over Mammoth Mountain into Sunday. The farther it drops south the more the up-slope winds will start to decrease.

The last week of January shows ridging and then by the last day of January the model is showing some troughing in a much better position than where it has been showing up. The GEFS also has moved the low closer to the coast.

Let’s hope and pray that trend of setting up more west continues so we get systems that are wet with sierra cement falling to keep building up the snow base over the higher terrain.

Enjoy the day, it’s a present… Snowman

 Here is the 45 Day EPS Outlook that came out last night. 

Satellite Images

NOAA GOES 17 Full Pacific Satellite View
NOAA GOES 17 Full Pacific Satellite View
Goes 17 West Coast Satellite View
Goes 17 West Coast Satellite View
PNA Forecast Chart
PNA Forecast Chart
Arctic Oscillation Forecast
Arctic Oscillation Forecast

The MOJO Outlook

MOJO - NCEP Global Ensemble Forecast System (NCPE)
MOJO – NCEP Global Ensemble Forecast System (NCPE)
MOJO - NCEP Global Bias-Corrected Ensemble Forecast System (NCPB)
MOJO – NCEP Global Bias-Corrected Ensemble Forecast System (NCPB)
MOJO - Climate Forecast System (NCFS)
MOJO – Climate Forecast System (NCFS)
MOJO - ECMWF Forecasts System (ECMF)
MOJO – ECMWF Forecasts System (ECMF)
MOJO - CMET Canadian Forecast
MOJO – CMET Canadian Forecast

MJO Phase and Temperatures

Mojo Temperature Composites (OND)
Mojo Temperature Composites (OND)
Mojo Temperature Composites (NDJ)
Mojo Temperature Composites (NDJ)
Mojo Temperature Composites (DJF)
Mojo Temperature Composites (DJF)
Mojo Temperature Composites (JFM)
Mojo Temperature Composites (JFM)

MJO Phase and Precipitation

Mojo Temperature Composites (OND)
Mojo Temperature Composites (OND)
Mojo Precipitation Composites (NDJ)
Mojo Precipitation Composites (NDJ)
Mojo Precipitation Composites (DJF)
Mojo Precipitation Composites (DJF)
Mojo Precipitation Composites (JFM)
Mojo Precipitation Composites (JFM)

Mammoth Mountain and Eastern Sierra Weather Posts

Who Are We?

Steve Taylor – Mammoth Snowman Over the last 30+ years, Snowman has spent countless hours studying and learning about Mammoth Mountain Weather and Snow Conditions first hand. He has been skiing around the hill with marked ski poles since March of 1991 so he can measure the fresh snowfall amounts out on the hill. 

Snowman started blogging this information back in 1990 on the old Mammoth BBS system, then the RSN Forums and then on to MammothSnowman.com in 2004 with Video & Photo Blog report. (No YouTube back then). Facebook got added to the fold back in 2008 and then the Facebook Group in 2016. 

Reports, videos, and photos from the website have been featured on both local TV Stations here in Mammoth, along with AP, Fox, ABC, CBS, and NBC News.

Ted Schlaepfer – Mammoth WeatherGuy – The Powder Forecast – Posted Tuesday and Fridays at 5 PM November into Mid May. These forecasts are now responsible for many people getting multiple powder days on Mammoth Mountain over the years.  

Ted’s Bio: Ted has been a full-time Meteorologist (CCM) for the past 25+ years. He has always been fascinated with the weather,” skiing was just a natural extension of my love for snow and rain. I started skiing at age 5,  first discovered Mammoth in 1979 as a youth, and have been a regular visitor since the late ’80s.”.

Here is the link to The WeatherGuys Powder Forecast Page. 

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