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D.C. area forecast: Muggy summer weather into Friday with storm chances; Cooler weekend

Today’s Daily Digit

A somewhat subjective rating of the day’s weather, on a scale of 1 to 10.

5
Was set to give a lower mark for heat and humidity but realized this is normal. and storms likely to hold off until evening.

Express Forecast

Today: Increasing clouds, t’storms possible late. Highs: 86-90.

Tonight: T’storms likely early. Lows: 67-72.

Tomorrow: Humid with t’storms likely. Highs: 83-87.

FORECAST IN DETAIL

Temperature Map

Temperatures: Latest D.C. area temperature map. See interactive map on our Weather Wall.

Looks like our mini-heat spell is on for a couple of more days before the marines come to the rescue; the marine layer that is. A northeasterly flow is likely to settle in notably by Saturday giving us back our temperate climate (albeit still moderately humid).

I was surprised that for the summer to date we are still running slightly above average. For me at least, it has been the short duration of the heat that has been the standout feature. We have not put together more than 3 consecutive 90 degree days this summer and it looks like that should hold. Yet again, my garden should get watered, most likely Friday evening with better than an inch possible and the sprinkler can remain retired.

Today (Thursday): Clouds should  break up quickly in the morning but go back on the increase by early afternoon as plenty of heat and humidity serve as fuel. While a thunderstorm is possible anytime in the afternoon, most are likely to be late to arrive with just a 40% chance of getting caught in one. Highs top out in the upper 80s and if the cloud breaks are big enough a rare 90 is possible. Winds are barely noticeable, raising the sweat factor!  Confidence: Medium-High

Tonight: Thunderstorms (60% chance) are likely to push across the area in the evening before dying out after midnight. Rain amounts should be mostly less than a half inch but locally an inch is possible. Clouds hang tough through the night and the humidity only gets worse under calm conditions. Lows hold up in  the upper 60s to lower 70s. Confidence: Medium-High

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

Tomorrow (Friday): There should be a striking resemblance of this day to the one before it. Some morning sun, increasing afternoon clouds and thunderstorms growing more likely as the day goes on (50% chance). Winds remain very light making the heat and humidity less amenable. Highs top out in the mid-to-upper 80s. Confidence: Medium

Tomorrow night: Thunderstorm are likely through the evening (60% chance) and given the humid conditions, amounts in many areas could be an inch or more. A northeasterly breeze should finally settle in later in the night as storms end but clouds are likely to hold which is unfortunate. A conjunction of Venus, Jupiter, and the crescent moon in the early morning hours may be lost to us. Lows level off in the upper 60s to lower 70s. Confidence: Medium

A LOOK AHEAD

Saturday could start off with a shower or two (40% chance) as the milder air coming in from the ocean squeezes some of the moisture out. However,  as you might  guess this is not a dry air mass by any means, so humidity remains  moderate.  Highs are the main selling point, only reaching the upper 70s to lower 80s. This is partly due to the likelihood of a stubborn cloud deck overhead but shower chances should minimize by afternoon… hopefully. The  evening is pleasant despite the clouds with 70s and minimal  shower chances. Lows fall to the mid-to-upper 60s. Confidence: Medium

Sunday gets best in class honors for the weekend with minimal shower chances despite a good deal of clouds much of the day. This should help  to hold down temps as does the ongoing northeasterly flow.  Highs should be upper 70s to lower 80s. Confidence: Medium

Monday looks very nice for all  those kids who are headed back to school.  Partly sunny skies and highs in the upper 70s to  lower 80s should make recess a treat. Confidence: Medium-High

David Streit grew up on a farm/ranch in Nebraska. Witness to severe weather of all varieties focused his career path. Degrees from the universities of Nebraska and Wisconsin prepared him to be a forecaster for Capital Weather Gang as well as his day job as COO of Commodity Weather Group.
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At a Glance

Fri.

snow
17° /31°
Drop 40%

Sat.

windy
19° /24°

Sun.

sunny_clear
10° /24°

Mon.

snow
18° /35°
Drop 50%

Tue.

rain
31° /47°
Drop 70%

Wed.

rain
32° /46°
Drop 20%
National Airport
Dulles
BWI

Right Now

Washington, D.C., Snow Tracker

Current Snow Total
18.8"
Record Most Snow
(2009-10)
56.1"
Record Least Snow
(1997-98, 1972-73)
0.1"
Last Winter's Snow Total
18.3"

D.C. Area Almanac

 
National
Dulles
BWI
Avg. High
 
Avg. Low
 
Rec. High
 
Rec. Low
 
Sunrise
 
Sunset
°F
 
 
°C

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