Mammoth Mountain Weather Forecast & Discussion

November 7th, 2023 @ 5 PM – Good evening; several inches of heavy wet base snow fell over the last 36 hours out on Mammoth Mountain.

Skies should clear overnight, with mostly sunny skies now expected through the upcoming weekend. Snowmaking crews will have perfect conditions for the next couple of nights and then marginal snowmaking possibilities over the weekend.

Next week, it looks like there could be several systems that move through with multiple feet of snow. Scroll down the page to the 10-day forecast section for all the fine details.

5-Day Weather Forecast Details: At the Main Lodge, expect mid-day temperatures to be in the mid-30s on Wednesday, then coming up into the mid-40s on Thursday through the weekend.

Nighttime lows will be perfect for snowmaking the next couple of nights, with lower to mid-20s expected at night. Overnight lows will be in the low 30s over the weekend.

Expect NE winds on Wednesday at 20-40+ MPH over the mid and upper parts of Mammoth Mountain. On Thursday, the wind direction will change to the SW with gusts in the 5-20 MPH range from Main Lodge to the Top.

Mammoth Lakes temperatures will be in the mid to upper 40s on Wednesday and then lower to mid-50s on Thursday and into the weekend, with nighttime lows in the twenties.

Down in Bishop, it will be in the upper 50s to lower 60s for the next couple of days and then upper 60s this weekend with lows in the upper 20s to lower 30s.

Snowman out...

Possible Snowfall Totals for the next 12 Hours on Mammoth Mountain
Possible Snowfall Totals for the next 12 Hours on Mammoth Mountain

Mammoth Mountain 10-Day Weather Discussion

10-7-2023 @ 6 PM – The change in the weather we have all been waiting for hit on Monday into Monday night. That’s when Mammoth received heavy wet base snow mixed in with some rain and then more base snow above the 8500-foot level.

By Tuesday morning the snow turned to showers at times with the snowmaking guns getting turned on at 9 AM.

This was a great start in getting the ground moist and now frozen and then covered with some 1:2 ratio glue. A perfect setup ahead of the next system that moves in early to the middle part of next week.

Tonight’s data has that next low off the California coast on Tuesday with multiple moderate to strong fronts coming through the Mammoth area all the way out into day 10.

Confidence in this particular outcome is low at this time. I will update the 10-day forecast again on Wednesday evening with the latest on next week’s possible storm cycle.


Content on this Mammoth Weather Page from: Steve Taylor (Snowman), Ted S (CCM), NWS Reno / Hanford / Vegas. Model Images from Weather Bell with on Hill WX data from the Mammoth Mountain Ski Patrol.


Mammoth Mountain 10-30 Day Fantasy Weather Outlook

** Weather Disclaimer: The Fantasy Outlooks are “Outlooks, Not Forecasts.” Some years, the wet patterns that appear in these longer range outlooks pan out; other times, the changes are always out in the fantasy period and never make it to the short-term forecast period. When all the ensemble models have agreement on wet or dry patterns, more often than not, they do seem to pan out more often then not.

11-4-2023 @ 5 PM – The longer-range 10-30-Day Fantasy Outlook is calling for below-average snowfall, with temperatures looking just a bit below average now

Pray for Snow, Snowman – Next 30 Day Outlook Update on Sunday 11-12

840 Hours Out – ECMWF Extended Ensemble Mean

840 Hour Snowfall from the ECMWF Ext. Ensemble Mean



ECMWF – Seasonal Mean Precipitation Outlook – 11-5-2023

ENSO – El Nino / La Nine Outlook – September 26th, 2023

El Niño Update: The current El Nino is in the strong category. How the event affects Mammoth Mountain and the Eastern Sierra this winter is uncertain. There are a lot of variables with this particular El Nino event that have not been seen during other strong events. Take a look at the video below for more information.

There are not a lot of strong El Ninos to look back at, so it’s hard to trust any of the long-range data right now. Past El Niño winters have been slow to start, so don’t be surprised if the Eastern Sierra sees below-average rain and snowfall this Fall. 

The video below is new from Mike Discussing the most current El Nino Data. All the images in this section have been updated, with what’s the most recent on there as of 9-26-23.

> To note, El Niño winters can be slow to start, so don’t be surprised if the Eastern Sierra sees below-average rain and snowfall this Fall.

SSTA Mammoth Weather Forecast
SSTA Mammoth Weather Forecast

Current Weather and Information Posts

Author – Steve Taylor – The 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 reports. (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 and Bishop, along with KTLA, AP, Fox, ABC, CBS, and NBC News.

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