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Everything posted by TT-SEA
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I was reading the Portland NWS write up on the storm... for a single event this was about as impressive as it gets there. Undoubtedly the absolute best part of this situation is the fact that it happened going into another round of cold air. Being able to enjoy it for days is so very different than only being able to enjoy it during the night it was happening. You wait years for these events... thankfully nature is giving you ample time to take it all in. It really does not get much better than this down there.
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By Sunday there will have been 35 days with solid snow cover here since December 4th. That is 35 out of 42 days. And 42 days in a row with at least some snow on the ground. Pretty impressive even in this favorably snowy location and certainly far better than recent years. Some serious rain shown on the 00Z ECMWF for the first half of next week... guessing that will end this current streak.
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We peaked at 40 inches in 2008... guessing this spot of land had 5-6 feet of snow on the ground in years like 1916, 1950, and 1969. We have a steeply pitched roof so we probably could withstand that now... but it 2008 we learned the hard way that we really needed a ice shield under our shingles in an area where the peaks meet. We had water pouring into our house around Christmas from an ice dam. They had to remove all the shingles and install a ice shield that summer. We have not had any problems since. I imagine if we had a repeat of 1950... the county would send up the plows they use at Snoqualmie Pass that throw the snow to keep our roads open.
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I think what happened in Portland last night is somewhat similar to what happened here on 12/1/2005. Departing low with cold air coming behind it and a deformation zone on the back side that just pounded eastern King and Pierce counties. I had 17 inches of snow in about 8 hours night that. Someone here probably remembers the details... but the events last night in Portland reminded me of that event. We had thundersnow that night as well,
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Yes... obviously the convective nature of the precip was a game changer. The players were all modeled correctly and we knew the potential was there with a wrap-around deformation zone. Its not like we thought there would be no snow down there. The models did pretty good overall with the placement of zone.
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Snow clearly on the ground as far north as Centralia per the WSDOT cams. The cams from Olympia to Tacoma are still annoyingly down. OLM has 31 with a dewpoint of 17 and wind NE10 and did not report snow on any hour overnight... so probably lots of flurries from Olympia up through southern King County.