Weather 9-17-20

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Weather models are still expecting slightly improved conditions with the smoke today compared to the previous days. The improving trend will continue through the weekend as the area of low pressure off the coast is trending for an arrival on Friday.

Weather forecast for today calling for widespread smoke and haze, light wind with afternoon high temperatures in the upper 70’s to lower 80’s.

The storm system will slowly push onshore Friday morning and begin to have its presence felt along the Cascades. The low will slowly move through Northcentral Washington Friday afternoon and Saturday. Forecast models are in decent agreement with the timing and carrying widespread light precipitation to almost all of the state.

Forecast for the Columbia Basin and Wenatchee Valley Friday: cloudy skies with 40% chance of showers during the day going up to a 50% chance by Friday night, highs in the upper 70’s to near 80 degrees. For the most part, precipitation will generally be light but some showers could bring heavy downpours that could cause possible flash flooding issues for recent burn scars across the region Friday afternoon.

There is a 30% chance of morning showers on Saturday as well with partly cloudy skies by afternoon with highs in the lower to mid-70’s.

The upper level trough moves out of the area on Sunday leaving significantly cleaner air by Sunday afternoon. Weather models are in agreement that the Inland Northwest will generally be in a westerly zonal flow beginning on Sunday.

Overall, Sunday through Tuesday will feature quiet weather with sunny skies and highs each day generally in the upper 70’s.

A large area of low pressure will nudge its way into the western part of the state on Wednesday bringing a 20% chance of evening showers, highs once again mainly in the upper 70’s.