Mammoth Mountain Weather Forecast & Discussion

February 18th, 2023 @ 9 AM – The Holiday weekend should be a good one with much warmer daytime highs along with pt cloudy skies and a light SW wind flow.

If you’re going to be out on the hill on Saturday and Sunday expect mostly sunny skies with temperatures at 8:30 AM in the lower 20s. By mid-day temperatures will be up into the upper 30s to lower 40s. The wind forecast has the wind out of the NE with wind speeds on the lower hill at 5-10 MPH with mid and upper mountain winds in the 10-15 MPH range with gusts to 20-25 over top ridges.

Presidents Day also looks great with sunny skies and highs jumping into the mid-40s around Main Lodge.

Beyond Monday, the Next Storm Cycle will slowly start ramping up, read down the page for the extended outlook.



Mammoth Mountain 5-10-Day Extended Outlook

2-18-23 – As of this post, you can expect a new series of storms to be moving through the Mammoth Mountain area starting late next Tuesday into Friday with a break next weekend and then more snow the following week possibly into early March.

Looking at the newest data this morning this new weather pattern looks to be capable of bringing in some epic light and dry powder up on Mammoth Mountain. Over snowfall accumulations will be on the lower levels with 1-2 feet of snow possible in the 5-10 Day outlook period.

With all the cold air in place and with the track these systems will be taking, you can expect some light and dry Alta-like powder out on the mountain off the groomed runs. The groomers will turn to a nice soft and quiet mid winter packed powder.


5-10 Day - ECMWF 500 Height Anomaly
5-10 Day - ECMWF Snowfall

11-16 Day Super Fantasy Long-Range Discussion

2-18-23 – The troughing off the west coast continues to show up right through day 16 on the EPS model below. More cold powder chances would be in the offering. Yes, it’s way too FAR out to nail down the details and any amounts. 

11-16 Day ECMWF EPS 500 Height Anomaly
11-16 Day ECMWF EPS 500 Height Anomaly

Extreme Fantasy Outlook Model Data

2-18-23 – Here is the updated data for this Saturday morning. The EPS keeps winter going into March 8th and then precipitation chances die off quickly. The GEFS keeps the snow show going at times right up to the last day of winter on March 21st, 2023. Please note none of the fantasy outlooks have a big AR hook up just nice cold air with light to moderate amounts of fresh powder. 

ECMWF EPS 500 Height Anomaly February 27th to March 21st
10 Day Day Snowfall ECMWF EPS 500 Height Anomaly
11-20 Day Snowfall ECMWF EPS
GEFS High Anopmply Chart February 27th to March 21st
GEFS Snowfall February 27th to March 21st
ENSO Outlook

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