Mammoth Mountain Weather Forecast & Discussion

2-18-2024 @ 9 AM – Here is an update on the incoming storm system. Operational and Ensemble Models have backed off on their QPF forecasted amounts, while the higher resolution models hold onto double the amount of QPF this morning.

The EU model has 2.28, the GFS 3.07 while the HRRR and NAM Runs this morning have 6 inches of QPF. The ECM Ensemble has 1.68, and the GEFS is at 3.58. As Ted mentioned on the Powder Forecast on Friday, there was lower confidence at that time on the QPF that was showing up.

As of this morning, the snowfall amounts forecasted for the Lower Mountain and around Mammoth Lakes are in the 1-2 foot range. From Main Lodge up to the Top, snowfall amounts are forecasted to be in the 2-4 foot range. Models this season have been hyping up their QPF forecast only to lower them as the event draws near.

Snow Levels tonight will start around the 7500-foot level and then drop to around the 7000-7300-foot level on Monday. By Monday evening, snow levels will be coming down to the 6300-6500 foot levels and then, after midnight, down to around the 5500 foot level. Crowley Lake is at 6800 feet, with the Mammoth Airport at 7200, the lower part of Mammoth Lakes at 7800 feet, and the Main Lodge sits at 8900 feet.

If you’re heading to the hill today, expect clearing skies early with increasing clouds again in the afternoon. Mid-day temperatures will be in the lower to mid-30s around the Main Lodge. The wind will be out of the southwest wind, 20 to 25 mph, with gusts as high as 35-55+ mph.

Tonight, the snowfall will turn moderate to heavy at times, with 10-18 inches possible from Main Lodge to the Top by Monday Morning. Snowfall ratios look to be in the 8-1 to 10-1 range overnight.

On Monday, expect more moderate to heavy snowfall at times with mid temperatures in the mid to upper 20s. The wind will be out of the southwest at 20 to 25 mph, with gusts as high as 35-55+ mph. Snowfall accumulations look to be in the 10-18 inch range on Monday, with snowfall ratios around 10-1.

 Snow Study Site & Eastern Sierra Snow Pillow

The seasonal snowfall for February at the Sesame Street Snow Study Site is at 99 inches this morning with a base of 81 inches. Total Precipitation this season is around 22.5 inches of water with 189 inches of snowfall. Up top there is a base of 100-120+ inches with some great coverage.

DWP Snow Pack in the Eastern Sierra
DWP Snow Pack in the Eastern Sierra

El Nino – La Nina – Neutral Watch

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.

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