Mammoth Mountain & Eastern Sierra Weather Forecast

Mammoth Mountain & Eastern Sierra Weather Forecast

Friday, July 9th, 2021 @ 10:41 AM

Eastern Sierra Weather Synopsis: A very strong ridge of high pressure will be the story into the middle of next week.

The higher elevations will see very warm daytime temperatures with dangerously hot conditions below 7000 feet. 

Temperatures look to be at or near record levels Friday into Monday.

An increase in moisture will bring a few isolated thunderstorms (20% chance) to parts of the higher elevations today into Sunday.

By next Wednesday highs look to come down about 4-6 degrees from the peak of this high-pressure ridge, however it will still be very warm to hot in all areas. 

Lows at night will be warm until well past the midnight hour. If you’re coming up to the area make sure to bring a fan or two or you’re going to be too warm at night for a good sleep.

For those traveling to the area over the next week. Please know that in the Owens Valley there will be an extended period of heat expected.

Areas south of Bishop will be near 110 mid-day. Make sure your vehicle is ready for those conditions.


Air quality remains good at this time – Fire Conditions Remain Extreme in the Area


Mammoth Mountain Ski Patrol Current Conditions 7-9-2021

Mammoth Mountain Ski Patrol Weather Center
Mammoth Mountain Ski Patrol Weather Center

Cal Trans Window-cast

Mammmoth Mountain from the junction of Highway 203 and 395Highway 203 into Mammoth Lakes

Window-cast from the Mammoth Lakes Airport WebcamWindow-cast from the Mammoth Lakes Airport Webcam

Live Radar View of Central CaliforniaLive Radar View of Central California

GOES Satellite View of California and the West CoastNOAA Goes 17 Satellite View

Forecast for the Mammoth Lakes Basin & Main Lodge @ 8900 feet

NWS Mammoth Mountain Forecast

Forecast for Mammoth Lakes @ 8000 Feet

NWS Mammoth Lakes, California
NWS Mammoth Lakes, California

Forecast for Bishop @ 4200 feet

NWS Bishop, California
NWS Bishop, California

HRRR High-Temperature Forecast for Today

HRRR 18 Hour Precipitation Forecast


HRRR Current Dew Point

HRRR Current Humidity Levels

ECMWF EPS 10 Day Precipitation Forecast

ECMWF EPS Precipitation Forecast



ECMWF EPS Ensemble going out 10 days / 240 hours

EPS 16 Day 500 Anomoly 7-9-21



10 Day Temperature Forecast

Temperature Anomaly Outlook

Precipitation Anomaly Outlook
Air Quality and Fire Weather Watch

Currently under fire restrictions: the Town of Mammoth Lakes and the Inyo National Forest.

There are no Campfires, BBQs or Smoking allowed now out in the open. Even if you have a fire permit, it is not valid again this season.

Current Eastern Sierra Air Quality
Current Eastern Sierra Air Quality


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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 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. 

Click Here to Learn More About the People Who Make a Reality