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    Record-Challenging Warmth Across the Northwest

    By By Brian Lada, Meteorologist
    May 10, 2013, 8:11:48 AM EDT

    Warmth will continue across much of the Northwest through the upcoming weekend.

    Above-normal temperatures are here to stay for the Northwest as high pressure at most levels of the atmosphere responsible for these record-challenging temperatures remains over the region.

    One city that broke its record-high temperature on Monday was Seattle, Wash., reaching a high of 87 degrees. This was 25 degrees above their normal high for early May and broke the previous record of 79 set in 1957.


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    Although this ridge will hold strong over the region through the week, onshore winds along the immediate coast will allow slightly cooler air to make its way inland from the Pacific Ocean into Wednesday.

    This air flowing from the Pacific will bring moisture with it as well, resulting in areas of morning clouds and fog along the coast before giving way to sunshine in the afternoon.

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    An onshore flow can have a major impact on the weather along the coast, especially when it comes to temperatures.

    On Sunday, the coastal town of Hoquiam, Wash., had an easterly wind bringing dry, warm air to the town. This let temperatures soar to 87, setting a new record high for the day.

    By Monday, winds had shifted to be out of the west, drawing in cooler Pacific air, limiting the high to only 60.

    Warmth will build along the coast into Friday as onshore winds from the Pacific again subside.

    City
    High Fri.
    High Sat.
    High Sun.
    Seattle, Wash. 80 76 66
    Hanford, Wash. 93 94 88
    Spokane, Wash. 85 84 82
    Portland, Ore. 85 82 71
    The Dalles, Ore. 90 88 79
    Boise, Idaho. 84 86 92
    Miles City, Mont. 71 68 86

    During the weekend, the warmth will extend over the northern Rockies and Snake River Basin, while the coastal areas again cool with onshore breezes.


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