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Posted at 10:10 AM ET, 08/25/2009

Forecast: Dry Today, But Heat & Humidity Building

By Matt Rogers

* Hurricane Tracking Station | Augusts to Turn Hotter? *
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* Later: Friday's Storm Sequence *


Today: Mostly sunny. 87-91. Tonight: Partly cloudy. 67-72. | Tomorrow: Mostly sunny. 89-93 | A Look Ahead


The humidity finally drained away yesterday and along with highs in the 80s, we saw afternoon dew points dip into the comfortable 50s (humidity levels 35-45%). High pressure moving east from the Ohio Valley is responsible for this reprieve from muggyville. But its time and influence is short-lived as the air mass moderates and our winds start arriving from the south and southwest again. We'll inch up a little less comfortable today and then see the hottest weather of the week tomorrow.

Temperatures: Current area temperatures. Powered by Weather Bonk. Map by Google. Hover over and click icons for more info. Click and hold on map to pan. Refresh page to update. See map bigger on our Weather Wall.

Today (Tuesday): After a comfortable morning, we should see mostly sunny skies with slightly more heat and humidity compared to yesterday. Highs should range in the upper 80s to low 90s. Winds will shift and start coming from the south at 5 to 10 mph. Confidence: High

Tonight: Partly cloudy skies with a touch more humidity. Look for lows in the upper 60s to low 70s, the warmest conditions being downtown. Confidence: High

Keep reading for the forecast through the weekend...

Tomorrow (Wednesday): This should be the hottest day of the week as a cold front approaches the area and intensifies our hotter flow from the southwest. Humidity will not have time to reach the strong levels we saw last weekend, but it should still feel increasingly uncomfortable. Highs should mostly be in the low 90s around the area. Confidence: Medium-High

Tomorrow Night: Partly cloudy with lows mainly in the low-to-mid 70s. We could see some upper 60s in the suburbs though. Confidence: Medium


Thursday More clouds and moderate humidity should keep our area high temperatures in the upper 80s mainly, but we should not be surprised to see a 90-degree temperature sneak into the area. We will finally see a return chance of thunderstorms (30% in the afternoon and evening). Confidence: Medium

Friday will find the cold front inching closer to the area, but like last week, it should struggle to reach the area, keeping us on the warm and muggy side. Highs in the 80s with a 40% chance of afternoon storms. Confidence: Low-Medium

The weekend is tricky right now. The inclination is to favor yet again a slower cold-front arrival so that D.C. sits on the warm and muggy site of the cold front. This means another weekend with showers and thunderstorm threats with highs in the 80s and lows in the 70s. There is an outside chance that a developing tropical system off the Southeast coast could feed moisture into the area too. For now, we'll go with a 40% chance of daily showers and storms. But we'll need to watch the weekend closely and may need to increase those chances, especially on Saturday. Confidence: Low-Medium

As September approaches, it will become increasingly difficult to see as many 90-degree days, but it does look like we will still be contending with uncomfortable humidity issues from time to time.

By Matt Rogers  | August 25, 2009; 10:10 AM ET
Categories:  Forecasts  
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Next: Storm Sequence from Friday, August 21, 2009


Soooooo...just out of curiosity...any worries about this latest potentially named storm (Danny?) heading along the east coast this weekend? One track has it coming inland in NC, the rest kind of take it along a Bill-ish track. Any thoughts?

Kim in Manassas

Posted by: ksrgatorfn1 | August 25, 2009 2:09 PM | Report abuse

Like Kim I'd love to know more about potential "Danny". I read the NHC update but it doesn't say much more than the Bahamas and Turks & Caicos should keep an eye on it. I'm heading to Duck on Saturday so I'm kind of invested in this one :-)

Posted by: ana_b | August 25, 2009 2:17 PM | Report abuse

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