4:30 p.m. update: Rain has largely eluded the D.C. area today, focusing mainly to the east/northeast and southwest. The evening period may well remain dry, there’s just a 30-40 percent chance of scattered showers/storms. Rain chances are higher Tuesday.

9:30 a.m. update: Radar shows little activity this a.m. in the immediate metro area but some showers are developing well south of town. Expect showers and storms to increase in coverage and intensity through the afternoon. Morning hours are best for outdoor activities although even this afternoon showers will not occur everywhere all the time.


Today: Scattered showers and storms, some heavy. 79-84. | Tonight: Scattered showers and storms. Near 70. | Tomorrow: Scattered showers and storms, some heavy. 83-88. | Get Express Forecast9 by E-mail


Today (Monday): Unfortunately, a rather poor day for end of summer barbeques. Periods of showers and thunderstorms are likely, some of which may produce locally heavy rain and flash flooding. There will be breaks in the action and some areas wil get hit harder than others. In other words, it’s not out of the question there’s a window here or there when you can get outside for a bit rain-free. It’s warm and humid with highs in the low 80s. Chance of rain is 70 percent. Confidence: Medium-High

Tonight: Showers and thundershowers are likely this evening, some of which may be heavy. Activity should diminish a bit as the night wears on. It’s humid, with lows near 70. Confidence: Medium-High

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

Tomorrow (Tuesday): Expect more waves of showers and storms containing heavy rain in spots. Rain intensity and coverage is likely greatest in the afternoon and evening. Skies are generally cloudy but may brighten from time to time. It’s very warm and muggy as highs reach the mid-80s. Confidence: Medium-High

Tomorrow night: Evening showers and storms are likely and then activity relents gradually. Lows range from 70-75 (suburbs-city). Confidence: Medium-High


A weak cold front finally pushes what remains of Isaac through the area Wednesday. So we’ll have one more day filled with clouds and periods of showers and storms, with the afternoon and evening hours again favored. Highs reach the mid-to-upper 80s. Rain chances gradually decrease overnight, with lows 65-70 (suburbs-city). Confidence: Medium

Thursday is probably dry for the most part, although areas east of I-95 could see some showers and storms bubble up as the cold front is slow to move off. Skies are partly sunny, with highs in the mid-to-upper 80s. Partly cloudy Thursday night, with lows 62-68 (suburbs-city). Confidence: Medium

Friday and Saturday have the best chance to remain rain-free as we’re in between weather systems. They’re likely partly sunny and seasonably warm with highs in the mid-80s. Overnight lows are mostly in the 60s, with perhaps some upper 50s in the cooler suburbs. Confidence: Low-Medium

By Sunday, an upper level disturbance to the west may help to set off some showers and storms, particularly in the afternoon and evening. It’s seasonably warm, with highs in the 80s. Confidence:Low