Weather 12-4-19

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We will be watching the remnants of a weakening weather system moving through Northcentral Washington this morning. Precipitation generated by weather models continues to be light and spotty. Places with air and road temperatures below freezing this morning and also have a thermal profile that would support freezing rain are Leavenworth, Chelan, Wenatchee, Moses Lake, Wilbur, Omak, and possibly Colville. At this time, it doesn`t look like any of these communities will receive enough rain by 10:00 a.m. to produce much more than a light glazing…at most. Not all freezing precipitation is detected well by radar. Low clouds around Moses Lake, Wenatchee, and Waterville could produce a bit of drizzle. By late morning, impacts from freezing rain or drizzle should become less significant as road temps become less receptive to ice accumulation. Cloudy today with highs in the mid 30’s.

For Thursday, it looks like a mainly cloudy day as weak high pressure builds over the region. Areas of low clouds and fog are expected to persist across Northcentral Washington, highs tomorrow once again in the mid 30’s.

Friday, the upper level ridge of high pressure gradually flattens as a Pacific trough approaches and ushers in a mild and moist southwest flow. Mid to high level clouds increase east of the Cascades, although light winds and abundant moisture in the boundary layer will keep low clouds and patchy fog in place for at least the morning hours. Warmer Friday with a 20% chance of rain showers with highs near 40 degrees.

Friday night into Saturday morning is when the main precipitation band arrives with a 40% chance of rain, highs Saturday in the lower 40’s. Saturday night into Sunday, drier and cooler air begins to filter into the region from the north as winds shift out of the north. Skies gradually clear and showers slowly decrease especially across Northcentral Washington.

Patchy fog in the morning on Sunday with partly cloudy skies by afternoon, highs above normal into the lower 40’s.

Then by Monday and Tuesday, expect dry and stable weather with more seasonal temperatures as an amplified ridge of high pressure sits over the region with high temperatures both days into the mid and upper 30’s.