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
It's going to be a beautiful day here with sunshine and highs in the upper 60's. I started a thread for the upcoming storm early next week that could bring a variety of weather to the Plains.
It's looking more and more likely that a strong storm will bring a threat of severe weather along with heavy rain and potentially a Winter side depending on the amount of phasing that occurs. Currently the GFS has the upper level low closing off over NE Iowa and the Euro is more progressive both solutions bring beneficial rains to the center of the nation where moisture is needed badly. Lets discuss.
The official H/L yesterday was 36/31 there was a trace of snowfall. It was another windy day with a highest wind gust of 37 MPH out of the W. There was just 26% of possible sunshine. For today the average H/L is 50/31 the record high of 78 was set in 1905 and the record low of 8 was set in 1923. The most rainfall of 1.33” was in 2020 the most snowfall of 3.3” was in 1947 the most on the ground was 10” in 1970. Last year the H/L was 48/28.
With just 4 days to go in March even with the record cold this month with a mean of 41.2 is still +6.2 above average. There has been 3.54” of precipitation that is +1.52 the 7.2” of snowfall is right at average. For the season GR is now at 47.5” of snowfall that is a departure of -27.7” and is the 4 lowest snowfall total in the last 75 years.
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