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Steamy, (Stormy?) Over the Next 36 Hours
But Much Nicer Weather This Weekend

Josh Larson @ 10:00 AM

We'll look for two more days of very warm conditions -- punctuated, perhaps, by scattered showers and thunderstorms -- as a cold front pushes through the area by early Friday. Luckily, this cold front will allow for much nicer weekend weather, with temperatures and humidity levels falling to below-normal levels as high pressure builds in.


Forecast Confidence: MediumSteamy; stormy? We'll look for mostly cloudy, very warm and humid conditions today, with high temperatures in the upper 80s to low 90s, depending on cloud cover. An approaching cold front will bring scattered thunderstorms (a few of which may be severe) to the area during the day. Overcast and muggy overnight with a stray thunderstorm in spots and lows in the mid 70s.


Forecast Confidence: MediumUnsettled. Expect a cloudy start to the day Friday with a stray shower or thunderstorm, especially to the south of DC. The afternoon will feature a variable mix of clouds and some sun with high temperatures in the low 90s. Clearing and much more comfortable Friday night, with lows primarily in the mid 60s.

The Weekend

Confidence: High-Very HighMUCH Nicer! We'll look for mostly sunny skies and low humidity levels on Saturday with below-normal high temperatures in the low 80s in most spots. Mostly clear and comfortable Saturday night, with lows from 60-65.

We'll start the day mostly sunny on Sunday, though clouds may increase during the second half of the day, as a weak disturbance passes to our south. I'll call for a 20% chance of a late day shower, especially over the southern suburbs. Expect continued below-normal temperatures near 80 degrees for highs. Mostly cloudy with a stray shower Sunday night and lows in the mid to upper 60s.

Pattern Overview

The aforementioned cold front will bring scattered showers and thunderstorms to the area later today -- possibly lingering into Friday morning. But the main story will be the noticeably more comfortable temperatures and humidity levels this weekend as the flow aloft becomes northwesterly, allowing for some cooler air from Canada to filter down into our region. Early next week looks potentially rather unsettled, with high temperatures slowing creeping up through the 80s and the possibility of scattered showers and thunderstorms at times.

Pictured above: the GFS forecast model shows that by this weekend, cooler temperatures at 850mb -- courtesy a trough of low pressure over southern Canada -- will translate to much more comfortable air temperatures for our region; courtesy Unisys.


Next week's forecast
Forecast highs/lows: 88/72 (normal = 85/68)
Forecast precip: Near-normal

Forecast Confidence: High-Very High Monday looks to feature more clouds than sun with a slight chance of scattered showers and thunderstorms and high temperatures in the low to mid 80s; overnight lows will be in the upper 60s to low 70s. Expect similar conditions on Tuesday and Wednesday, with partly sunny skies and a stray thundershower possible either day. We'll look for slightly warmer high temperatures in the mid to upper 80s with overnight lows primarily in the low 70s. From this far vantage point, Thursday and Friday are likely to feature clearing and drying conditions with temperatures warming to at or above 90 for highs with overnight lows in the low to mid 70s.

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