D.C. area forecast: Summer swelter still missing in action

Today’s Daily Digit

A somewhat subjective rating of the days weather, on a scale of 1 to 10.

7
Not as amazing as the past couple days, but only a little humid and still below 90 is worth a good score.

Express Forecast

Today: Partly to mostly cloudy, 30% chance of p.m. showers/t’showers. Highs: Low-to-mid 80s.

Tonight: Becoming mostly cloudy. 30% chance of showers/t’storms. Lows: Upper 60s to near 70.

Tomorrow: Partly to mostly cloudy. 60% chance of showers/storms. Highs: Low-to-mid 80s.

FORECAST IN DETAIL

Considering we typically average about 23 90-degree days by the end of July, we’re faring pretty well this year with only 21 so far and no major heat wave in the near future. Even better, we’ve had the unusual summer fortune of several low-humidity days as of late. Mugginess increases a bit today and more so tomorrow, but it’s still far from oppressive and dips down again on Friday. Best chance of rain over the next several days? Tomorrow.


Radar & lightning: Latest regional radar shows movement of precipitation and lightning strikes over past two hours. Refresh page to update. Click here or on image to enlarge. Or see radar bigger on our Weather Wall.

Today (Wednesday): Light breezes from the south (around 10 mph) bring humidity back up to the noticeable, but not that uncomfortable range. Temperatures, on the other hand, remain mostly unchanged with partly to mostly cloudy skies and highs in the low-to-mid 80s. An approaching disturbance comes close enough for a 30% chance of afternoon showers or thundershowers. Confidence: Medium

Tonight: Skies turn mostly cloudy and the air starts to get that muggier feeling with lows only making it down to the upper 60s to near 70. There’s some uncertainty regarding the strength and track of an upper-level system coming through. So a 30% chance of showers and thunderstorms may have to be adjusted up or down later today. Confidence: Low-Medium

For related traffic news, check out Dr. Gridlock. Keep reading for the forecast through the weekend…

Tomorrow (Thursday): An approaching cold front could send a line or two of showers and thunderstorms through the area at some point during the day, with the overall chance of rain at any given location about 60%. Partly to mostly cloudy skies limit highs to the low-to-mid 80s with moderate humidity. Confidence: Low-Medium

Tomorrow night: Depending on the timing of the cold front, the potential for showers and storms may linger into the evening (40% chance). By late evening, though, the front should be past us and so should any rain. Skies see partial clearing overnight as a bit drier air works in and lows retreat to the mid-60s to near 70 (suburbs to city). Confidence: Low-Medium

A LOOK AHEAD

On Friday we should find ourselves nicely in between weather systems. The result should be partly to mostly sunny skies, low to moderate humidity, and highs in the mid-to-upper 80s. Friday night lows settle in the 60s to near 70. Confidence: Medium

Another cold front messes with the forecast for the weekend, probably bringing an increase in clouds at some point Saturday and a 40% chance of showers and thunderstorms Saturday afternoon or evening into Sunday. If the front pushes through the area with some momentum, we might see clearing skies and decreasing shower/storm chances by or during Sunday afternoon. Highs both days aim for the mid-to-upper 80s and again it’s not too humid. Confidence: Low-Medium

Dan Stillman is a meteorologist and editor for the Capital Weather Gang. He earned an M.S. in Meteorology from Texas A&M University, and a B.S. in Atmospheric, Oceanic and Space Sciences from the University of Michigan.
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Heat Tracker

47
90-degree days year-to-date
Yearly Average
36
Record Most
67 (1980,2010)
Record Fewest
7 (1886,1905)
Last Year
24

At a Glance

Thu.

partlycloudyday
-- /94°

Fri.

thunderstorms
76° /88°
Drop 40%

Sat.

partlycloudyday
71° /80°

Sun.

partlycloudyday
69° /84°

Mon.

partlycloudyday
73° /86°

Tue.

thunderstorms
73° /89°
National Airport
Dulles
BWI

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Jason Samenow · July 30, 2013

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