Really, really lovely cumulonimbus action tonight! I just happened to have my drone in the car and got some solid shots of DT Seattle/Lake Washington/Mercer Island/Bellevue looking north from Skyway. Alas, the focal length of the lens doesn't do the vertical height justice and my WB was off rendering it into semi-gross HDR territory, but still... fun looking weather! It was quite windy- I was flying right at 390 ft and the drone was giving me all sorts of warnings about sustained winds/gusts.
A most incredible snow storm. At times the snowfall rates have been as heavy or slightly heavier than January 2017. Temp 27.5, Dewpoint: 27.1 with gusty east wind and very heavy snow continuing. I'm at 11 1/2" now! UNBELIEVABLE!!!! This pic does no justice at all.
NBM is quite an interesting product! Their weighting algorithm is moderately complex and dynamic, though does has some drawbacks as we saw yesterday. For those who don't know, NBM is an attempt by NOAA to create a super probabilistic forecast model that ingests output from all the models above and outputs forecast guidance for local offices that help them to gauge the relative odds of particular weather outcomes. The 'special sauce' is the post-processing, normalization and weighting that they d
KSEA will challenge 1996 for the record min/max this Tuesday. Mark is 52F. Not sure if we'll beat it but we could match.... The margins are razor thin.
Mesoscale models picked up on this shower activity. The bulk of the cold air is now passing overhead and there are some converging airstreams in the lee of both the Olympics and Vancouver Island under stout NW flow as our ULL exits the westside. That and the Snohomish plateau is initiating a lot of this.
Looking at radar, the north end of the city is getting some leftovers. Most of it is dissipating before it quite reaches here, but I suspect that could change at any point.
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insta pin. glorious cloud pics!
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