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
I got a nice little weekend off coming up for me. Warm and breezy Friday, a bipolar Saturday with a warm morning crashing to onshore flow and drizzle by dinnertime, and a fairly cool Sunday. Might even nab one of those sub 50F highs which are rapidly becoming harder and harder to get.
Today's thermal profile is pretty much dry adiabatic all the way up to 700mb, thanks to some descending easterlies above 5000'. We worked extra hard to reach the 60s today, despite the chilly air aloft. Side note...Unless they knicked it just after 5pm, it looks like KSEA avoided the 60F mark by a hair.
No matter what though the dry air is making it feel much cooler. And as an ode to how deeply mixed today was, despite dewpoints in the mid 20s, there were still some tufts of cumulus about this afternoon; way up high of course at the very top of the boundary layer where the particularly precocious lifted parcels nudged just barely high enough to saturate, probably around 7000'+.
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