Mammoth Mountain & Eastern Sierra Recreational Weather Forecast

10-25-21 @ 1:25 PM Mammoth Mountain and the Eastern Sierra are now on the backside of the main AR band that has been the news the last several days.

Snow levels last night took hours longer to drop than we had anticipated. Seem the front almost came to a halt before it ever hit Mammoth and then once it did it hit the area the band sped up and has now exited. One thing is for sure the land is sure loving the recharge from all this rain.

Looking at the storm numbers, last night at the 9000-foot level there was 7 inches of rainfall before the snowline came down below Main Lodge. The water content in that snow is 1.77. The latter half fell at about 10:1 with the initial 2-3 inches at 1:2 / 1:3.

As for snowfall, the numbers have been spot on for the low side of what was forecast at Main Lodge. Looking at the snow study site is confusing, it’s showing the base has gone up more than the new snow. From what I can tell they have 14 new inches at Main Lodge.

Looking at the webcam at the top you can see the 3 metal bands on the Mammoth Sign. Each band is 4 feet apart and the first one is 4 feet off the ground. In that image below my guess would be 3 to 3 1/2 feet of snow.

The thing is, I did not check the sign before the storm so no idea how much was there when all this started.

I did just check in with Ski Patrol and they have not been to the top yet to make a call on the snowfall yet.

Trying to check with the guy on top but so far no word. So let’s just assume we picked up at least 2-3 feet of the base with a bit of soft on top.

Hopefully, when patrol gets out there they find 4-5 feet. I will let you know when I hear for sure, remember don’t buy into the hype. 

Here is the current satellite view of the Western States. Mammoth Mountain is pointed out for you.

Radar shows the main AR band has moved past the area.

Just a few more inches in the forecast before this system is over.

We go from a nice deep low back over to high-pressure ridging by mid-week.

This upcoming week will be highlighted by warm and dry conditions. We are out of the October storm cycle now and on to a new pattern. Look for a change in about 21 days.

Temperatures: For Tuesday highs at the Main Lodge and in the Mammoth Lakes Basin will be in the mid 30s. Highs will come up into the mid 40s on Wednesday and remain there thru next weekend.

Nighttime lows will be in around 19 tonight and then upper 20s to low 30s into the weekend.

For Mammoth Lakes, highs will be in the mid 40s Tuesday and into the low to mid 50s Wednesday into the weekend. Lows will be in the upper teens tonight and then lower 30s into the weekend.

Down in the Round Valley and the Bishop areas highs will be in the lows 60s Tuesday and then upper 60s to the low 70s through the weekend, lows will be back into the 40s each night.

Winds: Expect West to Southwest winds 10 to 15 mph with gust as high as 25 mph over the higher elevations over the next few days.