Weather 8-20-19

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Hot and dry weather continues today, before a strong cold front crosses late Wednesday bringing much cooler temperatures with a threat of precipitation and breezy conditions.

Today, Northcentral Washington will be in a dry southwest flow with a mid-level ridge of high pressure shifting east. Expect transient high clouds and some cumulus around the mountains, with afternoon highs in the upper 80s to mid-90s. Today is expected to be the hottest day of the week.

Wednesday a cold front approaches the Pacific Coast in the morning and pushes into the Cascades by late afternoon, before pushing toward Idaho by Thursday morning. Rain chances come to the Cascades Wednesday morning, expands out into the Okanogan Highlands through Columbia Basin after midday, and spreads eastward Wednesday afternoon to evening. Winds will also be on the rise with this front in some Northcentral Washington locations with possible blowing dust over some of the Columbia Basin. Wenatchee Valley weather for Wednesday calling for increasing clouds, cooler with a 40% chance of late afternoon showers, highs in the mid 80’s.

As the weather system moves east on Thursday, the majority of the region will be dry as winds slacken and skies clear. Under sunny skies, look for high temperatures to warm into the upper 70s to lower 80s…a few degrees cooler than normal.

A strong northwest flow aloft will then set up Friday and continue through the weekend. Guided by a strong westerly jet stream over the eastern Pacific, expect mostly sunny skies during the day Friday through Sunday with partly cloudy skies at night, light wind with afternoon high temperatures each day in the mid 80’s. The weather model consensus is for the flow aloft to become more northwesterly early next week as high pressure amplifies over the Eastern Pacific with highs late next week in the upper 80’s.