Mammoth Mountain & Eastern Sierra Recreational Weather

Thursday, June 6th, 2024 @ 3 PM – Here is what you can expect in the High Country into Saturday: First, there will be some buildups in the area, with a 20-30% chance of Thunderstorms over the high country and just a slight chance over the lower elevations.

Mid-day temperatures at the 9000-foot level (Main Lodge / Lake Mary) will be in the low to mid-70s, with overnight lows in the upper 40s to low 50s. Winds on Mammoth Mountain and over the higher elevations will be SW at 5-15 MPH, with gusts up to 20 MPH at times.

Temperatures for Mammoth Lakes will be in the upper 70s to lower 80s, with nighttime lows in the low to mid-50s. Winds will sometimes be out of the SW at 5 – 10 MPH. Mid-day temperatures from Crowley Lake to Toms Place will be in the mid to upper 80s, with nighttime lows in the mid-40s.

For Bishop to Mill Pond, Summer is on, with low 100s into Saturday. Morning lows will warm up into the low to mid-60s. An excessive heat warning has been posted from Bishop to Coso Junction into Saturday.


MSLP GIF out 10 Days – MSLP = The mean sea-level pressure (MSLP) is the atmospheric pressure at the mean sea level. This is the atmospheric pressure usually given in weather reports on radio, television, newspapers, or the Internet.

MLSP 10 Day Forecast
MLSP 10 Day Forecast

Temperature Anomaly GIF: Over the next ten days, we start out HOT then cool off to very warm and return to hot around day 6. Looks like the heat of summer is setting up early. Go to be a long hot summer at this rate, bring your fans if your coming up and staying in one of the Mammoth Lakes Condos you can rent.

*The term temperature anomaly means a departure from a reference value or long-term average. A positive anomaly indicates that the observed temperature was warmer than the reference value, while a negative anomaly indicates that the observed temperature was cooler than the reference value.

Temperature Anomaly GIF - Mammoth Mountain Weather Image
Temperature Anomaly GIF – Mammoth Mountain Weather Image

The Wind Forecast GIF – Looking at the National Blend of Models wind forecast, wind speeds over the next week will be gusty during the afternoon and early evening hours. That’s when you can expect SW winds at 10-25 MPH over the high country and wind-prone areas of the Eastern Sierra.

Wind Speed Forecast GIF - Mammoth Mountain Weather Image
Wind Speed Forecast GIF – Mammoth Mountain Weather Image

15-Day ECM 500mb Anomaly GIF – Today’s Weather Story: A strong ridge of high pressure will continue to bake the Eastern Sierra with excessive heat warning for Bishop through Friday. Temperatures will remain about 10-15 degrees above average for June through Friday. 

Over the weekend temperatures will back off 5-7 degrees as a weak short wave trough moves through. By next Tuesday the ridge re builds over the area again bringing with hit the next heat wave of Summer.

PS: The Boreal Summer starts on June 1st, that’s way I refer to this time of year Summer and not spring.

*We expect above-average temperatures with a below-average monsoon season for the Summer Weather Season. I am not 100% convinced we will be as dry as models are showing. The good news is we had a big winter followed by an average one, so I don’t expect total smoke or burnout in the Sierra anytime soon.

ECMWF 500mb Height Anomaly - Mammoth Mountain Weather Image
ECMWF 500mb Height Anomaly – Mammoth Mountain Weather Image

 Now that it’s June, I’d like to start looking at the ECMWF Seasonal Precipitation Model for next Fall. Below is the run from that model that was released to the public on May 5th. I will post the updated forecast in a couple of days when the next run comes out.

ECMWF Seasonal Model Run

Mammoth Mountain Weather - Outlooks from NOAA

DWP Precipitation for Mammoth Pass & the Eastern Sierra

El Nino - La Nina - Neutral Watch

El Nino Updated Information
El Nino Updated Information
El Nino Chart 3
El Nino Chart 3

El Nino Chart 1

El Nino Chart 2

El Nino Chart 4
El Nino Chart 4
El Nino Chart 5
El Nino Chart 5
El Nino Chart 6
El Nino Chart 6

* Mammoth Mountain and Eastern Sierra Weather is updated several times a week by local Steve Taylor. The goal is to provide detailed weather forecasts presented in an easy-to-read format. This isn’t a Hype, one-and-done model-run website. It’s just the basic facts from how I see it after 40 years of being involved in the local weather and recreation. And yes, I use Weather Bell for my forecasting data.


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.

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