By Gordon McCraw, Meteorologist for the Tillamook County Pioneer
That low pressure area that gave us all the rain and thunderstorms over the weekend, is now meandering off the Washington/Vancouver Island coast, bringing rain and showers north of Astoria. It looks like this low will start to drift southeastward tonight a give us a chance of showers under mostly cloudy skies, after around midnight, with calm winds, patchy fog is also possible, the low tonight near 57.
The best chance of showers is early tomorrow morning as the low drifts inland across Washington, giving the area about a 50% chance of showers, the winds becoming southerly 4-8, the afternoon high near 68. The low continues to slowly move eastward tomorrow night with its associated trough extending southwestward across the area which will continue to give us a diminishing slight chance of showers tomorrow night in the southwesterly flow, the winds die off so patchy fog is again possible, lows near 56.
By Wednesday, the low has weakened and ejected well east as another low pressure area drops down the coast, off British Columbia towards Vancouver Island. This low will continue southward during the day and bring a return of some showers under continued mostly cloudy skies, the winds becoming southwesterly 5-10, highs near 66. We see more showers Wednesday night, with light southwesterly winds, the low near 54.
More showers are likely Thursday with the low pressure area lingering off the Oregon coast, highs near 64, still with the mostly cloudy skies, the low that night near 53. After that, the forecast gets a little harder to pin down as the models have a hard time with exactly what that low pressure area will do. It looks like it moves down the coast Friday which would give us a chance of showers, then Saturday it pushes into northern California before turning north and moving into central Oregon, so Saturday looks showery also, highs near 65, lows near 55.
By Sunday, the models have the low moving east into Idaho which would give us improving conditions with a weak ridge of high pressure moving across our area so we see partly sunny skies and dry on Sunday, the high up near 70, then partly cloudy skies Sunday night, lows near 56.