Abbotsford_wx
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Everything posted by Abbotsford_wx
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The Chilliwack snowfall data is very suspect. They recorded 102 cm over four days, but only measured 36 cm on the ground at the end of it. The temperature never rose above freezing during that period. Compaction and sublimation can only account for so much loss. Either one or both of those measurements is way off. The problem inherent with measuring snow in an outflow area (particularly one that is very exposed), is that the winds are often so strong that any measurement is little more than an educated guess. You're supposed to measure in several places (including drifts) then average the measurement. It's pretty obvious that protocol was not followed in this case.
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That is totally understandable. I'm pretty fortunate because I live in an area that is usually very quick at restoring power. I can't think of a time in my life where the power was out for more than 18 hours or so (that includes when I lived in more rural areas than I do now). But I could definitely see it becoming a drag after a day or so.
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On a clear night I start looking for frost at about 39F. You'll usually find some if you look in the right places. Roof shingles cool very effectively by radiation, so they tend to be one of the first places to show frost. Yeah, there's a difference between frozen dew and frost, but to the layman they're the same thing. I've never heard a forecaster predict frozen dew, despite the fact it's probably just as common as "real" frost in the Pac NW because dew points usually start out above freezing and may not reach freezing until early morning. You can sure tell the difference when you're scraping your car windows - frozen dew is far more difficult to remove.