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Posted at 05:00 AM ET, 07/20/2012

D.C. area forecast: Steamy with heavy showers and thunderstorms likely

* Flash flood watch through this evening *

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EXPRESS FORECAST

Today: Mainly cloudy. Showers and storms by p.m., heavy rain possible. 84-90. | Tonight: Evening showers and storms. Mostly cloudy. Mid-60s to lower 70s. | Tomorrow: Mostly cloudy, less muggy. Showers and t’showers possible. Low-to-mid 80s. | Sunday: Partly cloudy. Isolated p.m. storms. Mid-to-upper 80s. | A Look Ahead | Get Express Forecast by E-mail

TODAY'S DAILY DIGIT

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


Stormy times a good bet. But, could argue that we need the rain, and that clouds joyously mute the heat. Get the Digit on Twitter | Discuss on Facebook

FORECAST IN DETAIL


Most of us actually should see rain today, but be warned localized amounts could be copious. Even though it’s been dry for most spots of late, flooding could be a concern. If driving, please remember “turn around, don’t drown.” Saturday—and especially Sunday—is our recompense, with a slight reduction in the heat and humidity. Isolated showers and storms by late weekend may become more widespread as the workweek begins, along with at least a small surge of heat. Drink that water!


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 (Friday): It’s probably mostly cloudy early with perhaps a few showers around. But, be cognizant of rains as the day wears on, because they could be heavy and, once they start, localized flash flooding could occur. We have a 75-85% chance of showers and thunder today, with activity more focused on the afternoon and maybe evening. Some storms may also be severe with strong winds or hail. We still should reach the mid-80s to near 90 (if more sun appears), aided by southerly breezes. Confidence: Medium-High








What is the Storm Threat Level?

Tonight: Evening showers and storms (70-80% chance) should continue for a bit, but they probably weaken before midnight. Low temperatures vary from mid-60s in the coolest spots outside the Beltway, to perhaps around 73 downtown. Confidence: Medium

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

Tomorrow (Saturday): Showers (40% chance) and clouds may pepper us for much of the day, but hopefully clearing out just a smidge by late afternoon. Thanks to light northeasterly breezes, some slightly drier (and less-warm) air tries to make low-to-mid 80s feel… comfortable? What is this comfort you speak of? Confidence: Low-Medium

Tomorrow night: A few pesky showers may continue after dinner (30-40% chance) as skies remain otherwise cloudy. Dawntime low temperatures again hit the mid-60s in a few lucky spots but probably only cooling to around 70 downtown. Confidence: Low-Medium

Sunday: Time for the pool. Relatively tolerable humidity, more sunshine than previous days, and only a small (10-20%) chance of an afternoon thundershower—it just begs for beach or pool time. High temperatures will still be summery, oh yes, in the mid-to-upper 80s. Confidence: Medium

A LOOK AHEAD

Sunday night: We may have a great enough number of breaks in the clouds to actually see the moon for once. Lower dewpoints should also give us a break from that heavy haze of late. Low temperatures before dawn only get to around the 72-75 degree range downtown, but lucky folks in further suburbs may reach the mid-60s. I’m jealous. Confidence: Medium-High

Monday may see a return to our typical muggy, hazy conditions with a small surge in heat. High temperatures should reach at least the upper 80s if not, possibly, as high as the mid-90s again. But, we’ve got this. Triple digits has been our game. Afternoon thundershowers can’t be ruled out—hopefully cooling us off—with a 30-40% chance your location sees relief. Confidence: Low-Medium

Tuesday may surge into the 90s, but at this point, we should stay shy of the 100 degree mark. Mainly familiar conditions, meaning we could copy much of Monday’s weather, as skies remain partially cloudy and hazy, with a 30-40% chance of thundershowers. We need that rain, so you can bet we’ll watch for it. Stay tuned! Confidence: Low

By  |  05:00 AM ET, 07/20/2012

Categories:  Forecasts

 
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