Mammoth Mountain & Eastern Sierra Recreational Weather

Thursday, June 13th, 2024 @ 8:30 AM – Here is what you can expect in the High Country into Monday: Above-average temperatures will continue today as a ridge of high pressure continues to make its presence known.

The ridge is quickly moving towards the east, which will lower heights in the area and bring in a bit of cooling on Friday. Further cooling is expected over the weekend into next Tuesday as a deep low drops in the western Great Basin. This looks to be the last day for the 20-30% chance of thunderstorms, and then the area will dry by Monday. 

Mid-day temperatures at the 9000-foot level (Main Lodge / Lake Mary) will be in the low 70s, with overnight lows in the low 50s. Over the weekend, expect mid-day highs to drop into the mid-60s, with mid-50s expected by Monday. Winds on Mammoth Mountain and over the higher elevations will be SW at 5-15 MPH, with gusts up to 20-25 MPH at times.

Temperatures for Mammoth Lakes will be in the lower 80s, with nighttime lows in the low to mid-50s. By Friday and into the weekend, you can expect 3-6 degrees of cooling. Winds will be out of the SW at 5 – 10 MPH, with gusts to 20 MPH at times. Mid-day temperatures from Crowley Lake to Toms Place will be in the mid-80s, with nighttime lows in the upper 40s to lower 50s. Midday temperatures over the weekend will drop into the low 80s.

For Bishop to Mill Pond, Summer is on, with perfect mornings in the 70s and 80s and then upper 90s expected by mid-day into Saturday. Temperatures will cool off big time by Sunday into next Tuesday.

Snowman

NWS Main Lodge Forecast - Mammoth Mountain Weather Image
NWS Main Lodge Forecast – Mammoth Mountain Weather Image
Satellite View of the Eastern Pacific and California
Satellite View of the Eastern Pacific and California

Today’s Mammoth Weather Story: Good morning. The Little Brother high-pressure system that was over the area this week is now moving east of the Eastern Sierra.

In its place, a large low-pressure system will drop right down in the eastern part of the Great Basin. This system will bring well below-average temperatures late this weekend into early next week before the area warms up again around days 8-10.

MSLP GIF out 7 Days – The gray you see over the Sierra on the GIF below indicates build-ups and thunderstorm ending after today as we move into a much cooler and drier pattern for about a week.

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 7 Day Forecast - Mammoth Mountain Weather Image
MLSP 7 Day Forecast – Mammoth Mountain Weather Image

15-Day ECM 500mb Anomaly GIF: This is the full 15-day run of the ECMWF Ensemble model. I find this solution is right more often then not compered to the other models. Been using the Euro version since Howard taught me this was the model to look at back in the early 90s. Until about a year ago you had to pay to get access to the ECMWF.

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

Temperature Anomaly GIF: Over the next ten days, we start warm and then cool of the well below average temperatures only to rebound quickly to more warmth at days 8-10.

*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

Summer 2024 & Longer Range Outlooks: 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 have shown during the spring.

Now that it’s June, I’d like to start looking at the ECMWF Seasonal Precipitation Model runs out six months. Below, you will find the 500mb Height anomaly for each month into November. Those will be followed the the precipitation anomaly images for each of those months. 

500mb Height Anomaly - ECMWF Seasonal - June 2024 Update
June – 500mb Height Anomaly – ECMWF Seasonal – June 2024 Update
500mb Height Anomaly - ECMWF Seasonal - June 2024 Update
July – 500mb Height Anomaly – ECMWF Seasonal – June 2024 Update
500mb Height Anomaly - ECMWF Seasonal - June 2024 Update
August – 500mb Height Anomaly – ECMWF Seasonal – June 2024 Update
500mb Height Anomaly - ECMWF Seasonal - June 2024 Update
September – 500mb Height Anomaly – ECMWF Seasonal – June 2024 Update
500mb Height Anomaly - ECMWF Seasonal - June 2024 Update
October – 500mb Height Anomaly – ECMWF Seasonal – June 2024 Update
500mb Height Anomaly - ECMWF Seasonal - June 2024 Update
November – 500mb Height Anomaly – ECMWF Seasonal – June 2024 Update
June - Precipitation Anomaly - ECMWF Seasonal - June 2024 Update
June – Precipitation Anomaly – ECMWF Seasonal – June 2024 Update
July - Precipitation Anomaly - ECMWF Seasonal - June 2024 Update
July – Precipitation Anomaly – ECMWF Seasonal – June 2024 Update
August - Precipitation Anomaly - ECMWF Seasonal - June 2024 Update
August – Precipitation Anomaly – ECMWF Seasonal – June 2024 Update
September - Precipitation Anomaly - ECMWF Seasonal - June 2024 Update
September -Precipitation Anomaly – ECMWF Seasonal – June 2024 Update
October - Precipitation Anomaly - ECMWF Seasonal - June 2024 Update
October -Precipitation Anomaly – ECMWF Seasonal – June 2024 Update
November - Precipitation Anomaly - ECMWF Seasonal - June 2024 Update
November – Precipitation Anomaly – ECMWF Seasonal – June 2024 Update

Last Update from DWP Precipitation for Mammoth Pass & the Eastern Sierra

El Nino - La Nina - Neutral Watch

ENSO State Update
ENSO State Update
ENSO State Update
ENSO State Update
ENSO State Update
ENSO State Update
ENSO State Update
ENSO State Update
ENSO State Update
ENSO State Update

* 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.

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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 MammothSnowman.com 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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