Mammoth Mountain & Eastern Sierra Recreational Weather
Wednesday, June 19th, 2024 @ 8 AM – Good morning; you will find clear blue skies up here with just a bit of haze off towards the Glass and White Mountain area. Up at the Top of Mammoth Mountain, the temperature is 42 with an SSW wind at 11.5 MPH, gusting to 12.2 MPH, and the RH is at 32%. Down at Main Lodge, the temperature is 47, with a light SW wind of 7 MPH.
Here is what you can expect in the High Country into Sunday: Mid-day temperatures at the 9000-foot level (Main Lodge / Lake Mary) will be in the lower 60s Wednesday, with warming daytime temperatures into the upper 60s on Thursday and then mid-70s Friday into Sunday. Overnight lows in the high country will be comfortable in the upper 40s to lower 50s.
Temperatures will rise by Wednesday. Expect mid-day highs into the mid-60s, reaching the low 70s by Friday. Overnight lows will be into the mid-40s by Wednesday and into the low 50s by Friday.
Winds on Mammoth Mountain and over the higher elevations will be SW at 5-15 MPH, with gusts up to 20-25 MPH during the afternoon hours through the upcoming weekend.
Today, temperatures in Mammoth Lakes will be in the upper 60s, with nighttime lows in the mid-40s. By Thursday and Friday, temperatures will rise into the mid to upper 70s, with low to mid-80s expected over the weekend. Winds will be out of the SW at 5 – 10 MPH, with gusts to 15 MPH at times.
Midday temperatures from Crowley Lake to Toms Place today will be in the upper 70s, with overnight lows in the mid-40s. Expect about ten degrees of warming Wednesday into Friday. By late in the week, overnight lows will be in the low to mid-50s.
For Bishop to Mill Pond, Summer is on, with mid-afternoon temperatures expected in the upper 80s to low the next few days. By Friday into Sunday, the low 100s should be back.
Tonight’s overnight lows will be in the 50s and then rise into the low 60s by Friday into the weekend. Bishop will experience gusty afternoon winds 10-15 MPH out of the NW into Friday.
Snowman
6-17-2024 – Mammoth / Eastern Sierra Weather Story:
MSLP GIF out 7 Days – Clear and dry weather will turn hot and dry by the weekend. Only chance for thunderstorms look to be late on Thursday as shown on the ECM MSLP just below.
The MSLP = The mean sea-level pressure (MSLP) is the atmospheric pressure at the mean sea level. It is usually shown on radio, television, newspapers, or Internet weather reports.
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 than not compared to the other models. I’ve 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. 
Temperature Anomaly GIF: Over the next ten days, we will start cooling and then warm up quickly later in the week and into next weekend. It’s going to be time to bring your fans with you when you travel up, or you’ll be hot if you stay in a condo.
*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.
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.
Jet Stream – This is the ECMWF ENS Run
45 Day ECMWF ENS Run – Looking like the Dog Days of Summer in July are going to be hot. Nothing new there for the Eastern Sierra and the Mammoth Lakes area. Let’s hope some deep moisture makes it’s way in at some point to refresh the area.
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.
Last Update from DWP Precipitation for Mammoth Pass & the Eastern Sierra
El Nino - La Nina - Neutral Watch
* 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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