Your problem is that you're looking at Canadian websites for your weather fix. Whenever I travel to BC, I'm a bit of a psycho in trying to determine what the weather is going to be, and the lack of good qualitative information on the forecast is really frustrating. All you get from Enviro Canada is the basic forecast for the towns in the valley locations. That's next to useless. Thankfully, we here in the US still do a few things right, and one of those things is publicly available weather forecasts and discussions via the National Weather Service website. There are a slew of NWS offices spread throughout the country, each producing a near and medium term forecast for their respective forecast areas. If these offices are adjacent to the Canadian border, you can feel pretty confident that the weather within shouting distance to the north of the border will be generally similar to that which is forecasted to the south.
For skiers in BC, this means getting intimate with either the NWS office out of Spokane, which covers the area from the Cascade crest over to the Idaho panhandle, or the NWS office out of Sea/Tac, covering the Olympic Peninsula, I-5 corridor, and the Cascades. I'm skiing with Valhalla Powder Cats outside of Nelson on the 8th-11th, so I've been blowing up the NWS Spokane site a few times a day. Each NWS office website has two features that should interest you. First, you are able to produce a pretty good seven-day text forecast for ANY location in their forecast area by clicking the spot you want on the map on their home page. If you know what you're doing, you can select a spot on the map that is in the mountains and will spit out a forecast for the elevations you're interested in (this is all driven by data from the computer models they use, from which a forecast can be derived for any elevation or location). For example, I've bookmarked the following spot at a 6600' elevation about 5 miles south of the border:
http://tinyurl.com/2s7onn
Note how it forecasts consistently below freezing temps, gusty winds, and 9-16" of snow in the next 36 hours. However, if you follow this next link for the forecast in Metaline, WA down in the adjacent valley at 2400', note the difference:
http://tinyurl.com/yt65mc
Temps peaking above freezing during the day, chance of some rain mixing in at times, and 6-12" of accumulations in the next 36 hours.
The second really useful tool is the Area Forecast Discussion. This is produced twice per day (usually around 3 AM and 3 PM local time) and provides a qualitative discussion of what the forecast looks like for at least the next week and sometimes longer. This product can be accessed by clicking on the "Forecast Discussion" link in the box on the lower right side of the page. this product is particularly useful if you take the time to parse through some of the weather-speak so you can follow most of what they're saying. In this afternoon's discussion, you'll find the following words that should be of interest to you:
But Tin Woodsman, Revy is like 300km north of the US border! Surely this doesn't apply to there? Poppycock. If there is a Pineapple Express hitting Revy, it's going to hit Washington State first. While the pattern is clearly changing from consistently cold and snowy, there are no dramatic warm-ups in the forecast that will impact mountain locations. Valley (2400' elevation) highs at the US/Canada border are forecasted to be in the 2-3 C range on the 11th through 13th. You should subtract 1-2 C for the town of Revy due to its location further north. You should then subtract an additional 1-2 C for every 1000 ft of elevation gain. In short, barring a completely unforecasted catastrophe, you're going to be good to go with good temps (hard to know if you'll have precip) for at least the top 3/4 of the mountain, and likely everything from the current gondi base on up. Keep looking at this site for the next 3-4 days and you'll have a pretty good sense of what the temps will be, along with an idea of whether there will be storminess in the area.
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