🧵 As much as I've talked about our impressive snowpack in Utah (and it is VERY impressive), the numbers in the Southern Sierra are truly mind-boggling! #cawx #nvwx #cawater
Just look at these basins via NRCS! The southeast Sierra Nevada, flowing into Mono Lake and Owens Valley is at an 8-station average of 452% of median! For this deep into the season, that's crazy!
One site, Big Pine Creek, is at 738% of median and already well over double the median peak that typically occurs in late March.
Why? This side of the Sierra is often shadowed and much drier than the west side. But these ARs have had good angles for spillover, and just so much forcing that they have easily traversed the Sierra Crest and dropped copious precip on the east side.
While all of California is well-above normal, this area is particularly anomalously ahead of schedule. Many areas already receiving close to their average calendar year precip average in the first two weeks of the year.
Bishop, CA, received more than its average calendar year precip in the first 10 days of the year!
I grew up on the east side of the Sierra, so I know first hand how important water is in this region. Long-term drought, coupled with diversion of water to Southern California has led to record low lake levels in places like Mono Lake.
Mono Lake is a lower profile, but decades-long battle to save a lake -- similar to what we are seeing with the GSL. Watching our fight to save GSL is like a mirror of the battle I witnessed as a kid to save Mono Lake. I feel like I'm living deja vu.
What I do know for sure is driving HWY 395 is gorgeous anytime of year, but I can't imagine how cool it is right now. I also know that it will be very late in the summer before people can climb Mt Whitney this year. And Death Valley will have an amazing spring wildflower season.

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More from @WasatchSnow

Jan 16
Brighton had 331" season total at this time last weekend on their website. They now show 406" with a 7-day total of 35". What?!? If you add up what they report every morning, they got 65" so that should be a total of 396". It just never makes sense. Image
None of this really matters from a practical standpoint. It snowed a lot and it's awesome. But when I'm trying to track these, it just makes me wonder what the hell is going on. And there's no way to verify it via telemetry right now.
It's a hilarious contrast to their neighbor, Alta, who literally reports snow to the half-inch. Brighton and Alta when it comes to snow reporting: Image
Read 4 tweets
Jul 18, 2021
The past 2 months has felt like I've had nothing to deliver but bad news -- an extreme drought, record setting hot temperatures with limited precipitation, and plenty of smoke. There is some optimism that perhaps the 2nd half of summer will be better than the first... 1/?
As mentioned, we (SLC) have seen more triple digit days than ever before at this point in the summer. 17 as of today! The record for an entire year is 21, and it looks possible we could break this. However, we may not see another triple digit after today for awhile... 2/?
Neither the GFS, nor the ECMWF, have SLC reaching 100+ again after today through the extent of their deterministic runs. Each model actually shows a substantial cooldown at some point as well. 3/?
Read 13 tweets

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