Those of you who live in the Tahoe area and follow Bryan Allegretto on OpenSnow know that I listed a few “chance” dates in the comments section a few weeks ago before model range. The second date, April 7-8, looks likely. This method, Wave Theory, as Mike Korotkin described on The Flakes Podcast, is really incredible. I don’t understand how it works. I have heard scientist try to describe what they think happens–the polar regions get covered in snow and the north pole goes into perpetual darkness until spring. Triggering some mechanism that anchors troughs in permanent positions until summer. The atmospheric flow follows those anchors and repeats. How? I sure don’t know! I’m sopping up as much knowledge as I can to better understand this phenomenon. All I know is it works.
So back to Tahoe. The first chance is a “Bowling Ball” event, as Bryan describes it, is scheduled for April 7-8th. A bowling ball is a cut-off low that spins of the coast until it gets sucked into the flow of the Jetstream. I had seen these cut-off lows in the early setup of this seasons Pattern so I thought I could go back through the data and predict one. I picked a couple of likely dates, according to the Pattern, and chose Feb 27th. April 7-8th was another likely date to pick a cut-off low, but I chose the 27th and it happened within 1.5 days of said prediction. I couldn’t get Bryan to bite on the challenge.
Below is the projected snowfall as of today–still a long ways off. I will keep monitoring the incoming system as it approaches.
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We are in the part of the pattern where the Heady/LRC becomes clear. We have completed 2 cycles and have compiled 92 days (1,152 GFS snapshots) worth of data, snow totals from resorts and not to mention all of the data from August and September where the pattern developed. I am releasing Future Snows predictions out to March 12th, as well as the results from every prediction to date.
January 25-26 Let’s dive into the predictions for the upcoming storms. January 25-26 for Colorado. This prediction was made back on December 13th. This storm occurs on days 21-23 of each cycle. The first time through back on December 26 Vail received 10” snow and additional rain, the second time through 12”. January and February are usually the strongest producing cycles, so let’s hope in this La Niña year it comes through. When I compiled this report I added Utah resorts, specifically Alta for January 25-26. I don’t have resort need it for the first cycle, however it’s clear by GFS that they received precipitation. The second time through they get 15”. Lake Tahoe was missed the first cycle, but did receive snow on the second cycle. So I will give Lake Tahoe a “maybe” as they are on the edge of this year’s pattern.
The storm is for Utah resorts, specifically Alta February 7-8. Alta received 12” during the first cycle, and 20” during the second cycle. For Colorado resorts the first cycle kicked off a week of storms on days 34 through 41. Vail received 25” during that week with the southern resort of Wolf Creek 28” of powder over 3days. The second time through four Colorado resorts was not as productive. They’ll get a paltry 4” during the first wave and an additional 9” with the second wave. In past years, cycle three has been more like cycle 1, but stronger—let’s hope that continues but either way, it will be an active period. Lake Tahoe was missed on the first wave, but picked up 13 inches at Sugar Bowl on dates 36 and 37. Lake Tahoeyou get a strong maybe—I’ll give you a heads up if it appears the storm is big enough on the model runs.
February 18 –19
The February 18 storm kicks off in the Pacific Northwest. I added this storm January 3 which is 46 days out from this publication. The Pacific Northwest is getting the snow this year. The snow goes somewhere every year and obviously this year it’s PNW and Canada. In the first cycle Crystal Mountain received snow from days 41 through 46 of the pattern. The only reported Snowfall came on day 45 and 46 when they started recording at the resort (15”). During the second cycle over the same time period hey received 33”. It’s a safe bet that Valentine’s Day is when the storm will begin but the best days should be the 18-19th for Crystal Mountain.
Colorado Resorts. Cycle 4 storm on days 21-22 of the cycle. I’ll update this prediction after cycle 3.