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
The new view of the supermassive black hole Sagittarius A* that was provided by the Event Horizon Telescope suggests that all black holes have a similar structure, according to astronomers at Harvard and the Smithsonian Institute who shared the imagery on Wednesday.
Here is the CIPS analogs, which are similar to the SPC.
At least for my area, it looks like mostly long straight hodographs, which will favor splitting storms. Lapse rates are excellent and the temperatures aloft are cool so large hail is probably the biggest hazard. It looks like an initial discrete supercell phase near or just east of here, following by a transition to QLCS stuff. Should be a potentially fun event at least.
The official H/L yesterday at Grand Rapids was 43/27 there was no rain/snowfall it was yet another windy day with the highest wind gust of 35 MPH out of the W. The sun was out 96% of the time. For today the average H/L is 50/31 the record high of 82 was set in 1910 and the record low of 6 was set in 1970. The most rainfall of 0.83” was in 1973 the most snowfall of 7.5” was in 1954 the most on the ground was 8” in 1970. Last year the H/L was 39/23 and there was 0.6” of snowfall.
There is a lot of frost this morning and the overnight low here was a cold 21 and at the current time it is 23 with clear skies.
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