Most Read: Local

Posted at 05:00 AM ET, 06/30/2012

D.C. area forecast: Dangerous heat, power outages and more storms

* Update, 12:30 p.m.: Excessive heat warning downgraded to heat advisory - temps running 5-10 degs cooler than yesterday. But still hazardous heat indices to 100-105 *

* Latest storm aftermath information | Powerful storms rip through region *

EXPRESS FORECAST

Today: Mostly sunny midday, p.m. severe storms possible. 97-102 | Tonight: Storms likely early, clearing. 70s. | Tomorrow: Partly sunny. Afternoon storms? Near 100. | 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


Another day near 100 with a good chance of severe storms. Not what we need right now. Get the Digit on Twitter | Discuss on Facebook

FORECAST IN DETAIL


With more than 1.5 million Maryland and Virginia homes and businesses losing power in last night’s severe weather, the one thing we don’t want is another super hot day filled with a significant storm threat. Unfortunately, we’ve got it. This heat is bad enough on its own, but given the sizeable outages and likely lengthy period to restore, extra caution must be taken by those “in the dark.”

Today (Saturday): There could be a few storms early, but they should not be a huge deal if so. Otherwise, we trend back toward mostly sunny skies and hot temperatures. Highs should have little trouble heading for the century mark again. As the day grows long, attention toward the west and northwest grows, as we eye the possibility of another damaging storm complex moving toward and through the area. Given how intense yesterday’s was, it’s hard to say we’ll see a true repeat, but it’s certainly possible. Confidence: Medium








What is the Storm Threat Level?

Tonight: Showers and thunderstorms, potentially severe, could continue well into the evening. But, as we head toward later hours activity should move away and diminish. If the air is rain cooled, temperatures should head toward the low-and-mid 70s. Otherwise, they may end up a little warmer for lows. Confidence: Medium

For related traffic news, check out Dr. Gridlock. Keep reading for the forecast into next week...

Tomorrow (Sunday): There’s no major change to the pattern, but perhaps some indication the main storm track might try to shift south a bit. Either way, we’re looking at highs again rising to near 100 along with an afternoon or evening storm threat. Anything that forms in this environment could become severe, though I’d not expect activity to be that widespread locally. Confidence: Medium

Tomorrow night: A slight shower and storm threat continues into the evening, diminishing overnight. Lows should range from the upper 60s to mid-70s. Confidence: Medium-High

A LOOK AHEAD

On Monday, we may get a tiny respite from the heat, as temperatures drop back to more typical hot levels. Partly to mostly sunny skies combine to send temperatures into the mid-90s. There’s a slight risk of a shower or storm, but for now it doesn’t appear to be much. Heading into the overnight, we see lows fall to the upper 60s and low 70s. Confidence: Medium

Tuesday brings more partly to mostly sunny skies to the area as well as high temperatures headed for the mid-90s. Since it’s still rather warm and there’s some humidity around, might as well mention the chance of a shower or storm late. Confidence: Medium

By  |  05:00 AM ET, 06/30/2012

Categories:  Forecasts

 
Read what others are saying
     

    © 2011 The Washington Post Company