Mammoth Mountain & Eastern Sierra Weather Forecast

Mammoth Mountain & Eastern Sierra Weather Forecast

Mammoth Mountain & Eastern Sierra Recreational Weather Forecast

Tuesday, October 12th, 2021 @ 11 AM

Weather Summary: Over the next couple of days the weather will be dominated by a strong inside sliding low-pressure system that has brought more snow and great snowmaking conditions.

The low will take its time moving east and will keep the cold air around for several days. By the weekend a ridge of high pressure moves in and brings with it some great Indian summer weather to Mammoth Mountain and the High Country.

Nope, it will not be warm enough to melt off all the snow at the ski area. Crews are working hard to pack and preserve what’s fallen and the snow they are making right now.

Checking the window cast clear skies with very cold October tempratures as we approach the 11 AM hour.

Taking a look at local conditions the last couple of days. Yesterday at the top of Mammoth Mountain there was a high of 18, the low this morning was 6 and at 11 AM the temperature is 9. The peak wind gust over the last 24 hours was 101 MPH @ 11 PM out of the ENE.

The snow study site @9000 feet is showing 5 inches of snow on the ground with a temperature of 18 with .27 of precipitation on Monday and 4.2 inches of fresh snowfall. That brings the snowfall total this week up to 10.7 inches with more up top.

In Mammoth Lakes, the temperature peaked at 34 degrees on Monday with a low of 17 degrees this morning. Winds in town have been out of the ENE with peak gusts of 9 MPH today.

For Bishop, the temperature peaked at 64 degrees on Monday with a low of 36 degrees this morning. Winds in Bishop on Monday came out of the NNW to 40 MPH creating one big dust storm all the way to Coso Junction.

The windowcast at Main Lodge Shows Clear Skies with the Snowmaking Guns Cranking away.
The windowcast at Main Lodge Shows Clear Skies with the Snowmaking Guns Cranking away.

Precipitation & Snowfall Forecast: No snow or rain in the forecast through the weekend. Over the last week, there were 6.5 inches of new snow at the snow study site on Friday. Then on Monday, there appears to have been 4-6 inches of new snow at the snow study site… trying to confirm the exact amounts from the last 24 hours with the ski patrol.

Temperatures: Highs will be in the low 30s at the Main Lodge and in the Mammoth Lakes Basin on Monday and Tuesday. Highs warm into the mid to upper 40s by Wednesday and Thursday. With late week into the weekend in the mid-50s.

Mammoth Lakes will be in the upper 30s to low 40s on Monday and Tuesday. With low to mid-50s Wednesday and Thursday and 60s over the weekend.

Bishop will be in the 50s to start the week and then by Wednesday and Thursday high will be in the upper 60s, by the weekend it will be 70s in downtown Bishop.

In the gif below you can see how the Eastern Sierra will remain below average temperature-wise until Saturday when we warm up again.

Winds: Very gusty winds at the higher elevations while at the lower elevations winds are light with a few moderate gusts.

Here are the links to the local NWS Forecasts for Main Lodge & the Mammoth Lakes BasinMammoth LakesJune LakeCrowley Lake, and Bishop.

Fire and Smoke Forecast: Skies are expected to be clear of smoke and haze until further notice.

Current Air Quality Image

Today’s Weather Story and The 10 Day Outlook​

10-12-21 @ 11:27 AM Images are fresh below… I will write a new 10 day and Fantasy update on Thursday PM. Everything snowfall-wise is being pushed back in time now. This is (Wednesday AM) and I am off to Main to check out how the snowmaking did. 

 

Mammoth Mountain 6-10 Day Weather Outlook Mammoth Mountain 6-10 Day Precipitation Outlook

Fantasy Long Range Weather Outlook

  

 ECMWF Seasonal Ensemble Mean – Monthly Update from 10-1-2021

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. 

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