As expected, quite a bit of rain moved in on Thursday, and there were even a few thunderstorms here and there. We’re staying fairly dry today, but how long is that going to last?
Thursday – High 62°F, Low 50°F; As I mentioned above, we got a bit of rain on Thursday, but at least it wasn’t as much as on Wednesday. Boeing Field registered just under half an inch of rain, with some areas getting more throughout the day, as well as a few thunderstorms moving through. Skies were overcast for most of the day, with a few sun breaks towards the evening. Winds were pretty windy all day, with gusts getting up to 22mph.
Friday – High 60°F; Not as much rain today, only a few showers moving through the area in the morning. Skies have been mostly cloudy to overcast, with breezy conditions in the morning. The rain from the next system has started to move in at the time of posting.
WARNINGS – Right now, all there is is a Wind Advisory in effect for the foothill areas for strong winds overnight. This can cause local power outages, and snap tree branches as well. With the wind forecast you’ll see below, I expect a few more advisories for both land and waterways this weekend. For more info, please see here.
Washington Huskies vs. Arizona State Sun Devils (Kickoff 7:45pm) – Hopefully the Sun Devils draw their power from the Sun, because they won’t be getting any on Saturday! Not to mention all of this rain may come as a shock to them (if anyone remembers the UW/Arizona game last year, it was quite a blowout, and not in the deserts favor). If you don’t have a rain jacket or a poncho (don’t bring an umbrella, don’t be that guy), you should probably go get one now. The rain will have started well before the game, and looks to stick around for the entire game. Winds will be fairly calm towards the beginning of the game, but may start to pick up as it progresses. As for temperatures, the game should start in the mid 50s, and drop a bit from there, so make sure you bring a warm rain jacket.
It looks like the trough that was expected to break off into an isolated upper level low will actually not break up, and will continue to move east into our area. This is definitely going to cool things down, and it will be bringing in even more weather. Once it moves over us, it will start to spread out some and make itself at home. On Sunday, an arm of cold air will move in from Canada, which will cool things down a few more degrees. By the end of the forecast, the trough will start to move east again, putting us into a transition between this trough and hopefully a ridge. That didn’t quite work out last time, so we’ll have to see how things go on Monday.
For once, there’s quite a bit of activity on the sea level pressure model. The low to the southwest which brought in the frontal system on Friday will actually move to the northeast very quickly (it helps that another low will form near us, so it just melds into that one). By Saturday afternoon/evening, we’ll have a low pressure system right above us, and it’ll move slightly north as the day progresses. By late evening, it looks like the associated cold front will swoop in, cooling things down and bringing in some rain (and hopefully snow). After that, it will start to move away and weaken slightly, so Sunday doesn’t look too bad for pressure/fronts. As for rain, temperatures, and wind, that may be a different story.
The next frontal system will start to move in overnight tonight from the south. Hardest hit areas will be the mountains, especially the Olympics. The Sound will get a good dousing, but Kitsap and Mason Counties will be getting quite a bit. If you live near a river or stream in those areas, be prepared for probable flooding! Through Saturday, it looks like things will start to break up into scattered showers and then dry out, but then the new front will just push everything back in. The strong showers will be a little more widespread this time, with all areas getting some significant precipitation. Sunday appears to dry out of the most part, with scattered showers mainly sticking to the mountains. By the afternoon, more rain will start to move in, with heavier rain in the mountains and up by the border. This low pressure system will bring along a decent amount of CAPE as well, especially on Sunday. Even though I think it might be too cold for thunderstorms on Sunday, the CAPE model things otherwise, along with the fact that we had one the other day. I’m thinking an isolated thunderstorm or two, mainly on Sunday, mainly in the foothills and mountains.
Snow will continue to fall up in the Cascades overnight tonight, then dry out for Saturday, with a few scattered snow showers in the higher elevations. By late Saturday night/early Sunday morning, quite a bit more snow will start to fall in the Cascades, and that snow level will be dropping with the temperatures. Most of the snowfall should be done by mid morning, but it’ll start to pick up again by the end of the forecast. Ski and snowboard season is getting closer!
Expect overcast skies tonight, and by Saturday afternoon we may see some sun here and there. But as that front starts to push everything back in, expect the skies to turn overcast once again. Things look to start to clear up by Sunday morning, but not by much. I’m expecting mostly cloudy skies for most of the day, with cloud cover increasing towards the end of the forecast.
Here are the 24hr precipitation totals,
And here are the 48hr snowfall totals.
Expect winds to stay pretty windy going into Saturday, especially up in the Cascades, and even more in the Olympics and Salish Sea. Very gusty conditions for these areas, as well as some strong gusts for the Sound. It’s actually looking like most of the weekend is going to be pretty windy/gusty, with the strongest winds in the same areas. Things will start to calm some by Sunday afternoon, but strong winds will stick around for central Sound.
With the cold air moving in from Canada on Sunday, we can definitely expect a cool down around that time. For Saturday, we will actually have temperatures similar to what we’ve seen recently. With that cold front moving in, we will actually hit our high around mid afternoon, getting into the low to mid 60s for the Sound. Lows will be in the high 40s to low 50s. Sunday will see cooler temperatures, with highs only getting into the mid 50s. There may be some warmer temperatures along Hood Canal and the northern part of Kitsap, but not by much. Lows will be in the high 40s once again.
TL;DR: Hopefully you got your yard work done before this weekend. Not that you had many opportunities during the week…