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Posted at 05:00 AM ET, 07/12/2012

D.C. area forecast: Decent today with building humidity and storm risks for weekend


Today: Partly sunny, seasonal. 85-90. | Tonight: Partly cloudy, comfortable. 66-72. | Tomorrow: Partly to mostly cloudy. Isolated storm. 84-89. | Get Express Forecast by E-mail


A somewhat subjective rating of the day’s weather, on a scale of 0 to 10

Another decent day with seasonal temperatures and relatively low humidity for DC in summertime. Get the Digit on Twitter| Discuss on Facebook


Say “hi” to Mr. Bermuda High. After today’s relatively low humidity, seasonal temperatures, and partly sunny skies, our big neighbor to the east will be edging our way for a weekend visit. Last week’s big heat wave originated from a dry ridge of high pressure in the middle of the country. This new round starting this weekend and persisting into next week offers more traditional DC-style heat and humidity. That means less record-breaking temperatures, but more humidity and daily thunderstorm risks. What are neighbors for?

Today (Thursday): With the warm front well to our south, we see enough high pressure today to offer up partly sunnyskies, seasonal temperatures (mid-to-upper 80s), and relatively low humidity. Afternoon dew points should be like yesterday with upper 50s and low 60s. Light breezes won’t cause any trouble. Confidence: Medium-high

Tonight: Partly cloudy and comfortable. Lows range from the middle 60s in the outer suburbs to the low 70s in the city. Light winds again. Confidence: Medium-high

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

Tomorrow (Friday): We start to slowly ratchet up the humidity today, but an increase in cloud cover (partly to mostly cloudy skies) should hold temperatures to just the mid-to-upper 80s. A 20% chance of mainly afternoon or evening thunderstorms is also back in play as the warm front edges back toward us. Confidence: Medium

Tomorrow night: Possible lingering widely scattered showers or storms (20% chance), but otherwise, the night should be a tad more humid under partly cloudy skies as temperatures bottom out in the upper 60s to low 70s. Confidence: Medium


Saturday and Sunday find increasing humidity, partly cloudy skies, slightly hotter temperatures, and an increased risk of thunderstorms. Highs should range in the upper 80s to low 90s with moderate to sometimes higher humidity levels. The 40% risk of scattered thunderstorms is mainly during the afternoon and evening, but we should be wary throughout the period. Like earlier this week, this type of air mass generates slow-moving drenchers. Confidence: Medium

Monday manages more of the same, but with slightly hotter temperatures. Expect highs in the low-to-mid 90s with yet another 40% risk of thunderstorms especially by afternoon as they capi­tal­ize on the heat and humidity of the day. Confidence: Low-Medium

By  |  05:00 AM ET, 07/12/2012

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