Forecast Last Updated at Thursday, September 20, 2018 at 12:03PM

Summer's Last Stand?

Average high temperatures for this time in September are in the lower 70s. We're not even in the ballpark the next handful of days as warm high pressure remains in control, but that changes beginning Sunday. Today and Friday are seasonably warm with only a stray PM thundershower mention. A front approaches from the west Saturday leading to scattered late afternoon and evening thundershowers (remaining warm beforehand). The front stalls across the region Sunday and Monday generating ample cloud cover, showers, and cooler temperatures.

Thursday Hi: 80 Lo: 59 A good amount of sun; Warm; Isolated afternoon t-showers; Light South wind

Friday Hi: 79 Lo: 60 Partly sunny; Pleasant; A stray afternoon shower possible; Light South wind

Saturday Hi: 78 Lo: 60 Increasing clouds; Scattered afternoon & evening t-showers; Light SW wind

Sunday Hi: 71 Lo: 57 Mostly cloudy; Scattered light showers (maybe a t-shower)

Monday Hi: 69 Lo: 57 Cloudy; Cooler; Scattered light rain

Further Out

Tuesday - Generally cloudy; Scattered light showers; High in the lower 70s; Low in the upper 50s
Wednesday - Partly sunny; Scattered afternoon and nighttime showers & t-showers; High in the lower 70s; Low in the upper 50s

Forecast Discussion

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The weather story through the end of the work week is rather straightforward- warm with stray PM thundershowers.

Here's the setup beginning this weekend:
A front crosses the nation's midsection Friday and Saturday, stalling over the southern Appalachians Sunday and Monday. The stalled front is reinforced Monday as high pressure briefly wedges down the mountains. Tuesday, the front retreats northward only to be followed by a stronger, yet more progressive frontal passage late Wednesday or Thursday.

The sensible results:
Scattered thundershowers develop ahead of the front Saturday afternoon and evening. However, it remains on the warm-side Saturday until then. Sunday is generally cloudy with scattered light showers and is noticeably cooler. Monday is another notch cooler and particularly wet thanks to the wedge configuration. Showers remain in play Tuesday though rainfall is much more intermittent as the front lifts north.

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