Weather Advisory:Unseasonably Cold Storm Coming

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So let me get this straight – last weekend the temp hit 75 or so, and this coming weekend it may…gulp…SNOW???

Or at least freeze all the spring blooms?

What’s going on?

Is this some kind of Earth Day practical joke?

From the National Weather Service, updated 10:21 AM PDT April 16, 2008:

Unusually cold weather is expected Friday through early next week…

A deep upper level low pressure system moving southeast from the Gulf of Alaska will move into the area Friday and will linger through early next week. This upper level low will give quite cool and unstable conditions to the area Friday and Saturday. While drier air will begin to filter into the area Sunday into Monday… temperatures will remain unusually cool for mid to late April.

At this time of year… temperatures in The Lowlands typically range from lows 35 to 45… and highs are near 60. Low temperatures on Friday and Saturday will generally be in the 30s… while highs stay in the 40s. These temperatures are more typical of early to mid February. Near record low maximum and minimum temperatures are likely on Saturday. Temperatures in the mountains will stay in the 20s and 30s.

Snow levels Friday night and Saturday morning will average around 1000 feet… and may fall to near sea level in heavier showers. Any snow that falls in The Lowlands is unlikely to stick… except briefly on cars and grass. The mountains and Cascade passes will see accumulating snow Friday through Saturday… with accumulations over the two day period possibly between 1 and 2 feet.

Strong high pressure developing over British Columbia Saturday night into early next week will allow drier air to filter into the area. While daytime temperatures will moderate into the lower tomid 50s Sunday and Monday… nighttime lows will be quite cold for this time of year with any clearing. Frost… with freezing nighttime temperatures in protected and outlying areas will likely cause problems for anyone with sensitive Nursery stock…ornamentals…or vegetables that were planted early.

Monitor the forecasts from the National Weather Service closely the next few days.

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