Forecast Last Updated at Thursday, July 27, 2017 at 4:39PM

Unsettled Through Friday

A warm front moved across the region today ushering in scattered showers & thundershowers with a slight bump upward in temperatures. Scattered showers and thundershowers stick around tonight ahead of an incoming cold front. The game-changing cold front moves out of the Ohio Valley Friday and into the High Country Friday night. It brings showers and storms, especially in the afternoon and evening. Much cooler air arrives Saturday on a brisk NW flow. Saturday begins with clouds and breezy conditions with spotty showers possible especially on the west side of the Appalachians. Sunshine increases Saturday afternoon leading to a gloriously refreshing Sunday.

Thursday Hi: 72 Lo: 67 Mostly cloudy; Scattered showers & thundershowers; SW wind becoming light

Friday Hi: 75 Lo: 64 Mostly cloudy; Showers and t-storms especially in the PM hours; SW wind 5-15 mph becoming NW Fri. night & gusty late

Saturday Hi: 70 Lo: 55 AM clouds with spotty light rain possible; Increasing afternoon sunshine; Much cooler; NW wind 10-20 mph, gusty in the AM

Sunday Hi: 72 Lo: 53 Sunny; Refreshing

Monday Hi: 74 Lo: 55 Mostly sunny; Still very nice

Further Out

Tuesday - Scattered PM clouds; Warmer; High in the upper 70s; Low in the upper 50s
Wednesday - Scattered PM clouds; Isolated PM showers & t-showers; High in the upper 70s; Low in the upper 50s

Forecast Discussion

After passage of a quasi-warm front earlier today, we are left with more humid airmass including scattered showers and thundershowers.

A strong cold front moves through Friday night. Friday is generally cloudy with showers and storms especially in the afternoon and evening hours.

Behind the front Saturday, a brisk NW flow develops between high pressure centered in the Western Great Lakes and low pressure on the Mid-Atlantic Coast. Temperatures will be much cooler. I also added clouds and spotty showers (especially on the west side of the Appalachians) for Saturday morning. Sunshine increases Saturday afternoon.

Sunday through Tuesday look exceptionally nice for late July. Temperatures will be about 8 degrees cooler than average Sunday then progressively return to seasonal averages by mid-week. That transition is thanks to Canadian high pressure moving slowly east from the Great Lakes to the Southern Appalachians. From 6-7 days, knowing when to reintroduce afternoon convection is usually a forecast challenge... I went with isolated coverage Wednesday, but that could happen a day earlier (or a day later).

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