Mammoth Mountain & Eastern Sierra Weather Forecast
Mammoth Lakes and Eastern Sierra Weather for Thursday, September 2nd, 2021 @ 10:57 AM
Good morning, there has been a nice cool down from Mammoth to Bishop over the last 24 hours.
As the low that has helped to bring us the cooler weather and clear skies moves to the east temperatures will slowly rise 4-6 degrees by Sunday into Monday.
The ridge of high pressure that will bring the warming will quickly move off the east by the middle of next week and temperatures will return back to average for this time of year.
Some of the models due have some precipitation from t storm next week, but as of now that’s highly suspect. Let’s pray all thunder storms stay was away, the last thing we need is lighting and new fire starts right now.
Smoke and Haze Update: Looks like the smoke haze will move back into the area starting on Friday. The NWS service thinks our air quality will not be great for the next week. (The HRRR smoke forecast can be really good but if any new fires happen or there are major flare-ups on the current fires, that forecast could change.)
Here is the link you can use to monitor the air quality in the Eastern Sierra. When the pointer is in the green or yellow range you’re good to go out and play. When the pointer hits orange and red I would avoid being outside for extended periods of time.
Also to note, only the N95 masks work to help prevent the haze and smoke particles from entering your lungs and bloodstream. The blue masks everyone is wearing are worthless against wildfire particles.
Temperatures for Friday and Saturday : Highs will be in the upper-60s on Mammoth Mountain and up in the Mammoth Lakes Basin at the 9000-foot level. Mammoth Lakes will be in the mid 70s with Bishop into the low 90s
Night-time lows will be in the mid to upper 40s for the high country and into the mid-to-upper 50s for Bishop and Round Valley.
Winds: Expect southwest winds in the 5-10 MPH range in the lower elevations with upper elevations seeing gusts in the 10-20+ MPH range at times.
Extended Outlook: Looking out towards the early Fall season we can expect to start to see insider sliders show up by late September into early October. Many a year there will also be the first dusting of snow later in the month of September.
I am watching daily and will post when we have something to talk about. I do promises not to jump on the hype train here with false expectations.
The next long range charts for the ECMWF should be out in the next 24-48 hours and I will post them up as soon as I have access.
For the upcoming Winter, more then half of the extended models have us in a neutral ENSO state, with some showing a weak La Nina. As of now, I expect the chances of an average snowfall winter are much greater than a 3rd year of exponential drought.
Current Model Images Updated on Thursday 9-02-21 @ 10:30 AM
HRRR Temperature Forecast
HRRR Precipitation Forecast
HRRR Current Dew Point
HRRR Current Humidity Levels
ECMWF EPS Accumulated Precipitation
ECMWF EPS Ensemble going out 10 days / 240 hour
GEFS Ensemble going out 10 days / 240 hour
360 Hour & 45 Day Snowfall Outlook
Long Range Outlooks from the ECMWF – Next Update on these images is 9-5-21
Forecasting Weather Images
The MOJO Outlook
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.