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
A strong line of storms was approaching Cedar Rapids this morning, but it weakened as it moved through. I got about 0.33" of rain out of it. Another line of storms is moving into central Iowa, which may affect the afternoon/evening severe chance.
A nice couple of warm days on the way with highs near 80 degrees today and into the low to mid 80's tomorrow. Next chance of showers by Thursday. For the Memorial Day weekend Friday looks great with sunny skies and temps near 80 degrees. Unfortunately, our weekend pattern for unsettled weather looks to continue. No washouts but some showers are possible almost anytime through the weekend.
Daily records for Chester County for today: High 97 degrees at Phoenixville (1934) / Record low 30 degrees in West Chester (2002) / Rain 5.56" at West Chester (1894)
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