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Posted at 5:00 AM ET, 08/ 3/2009

Forecast: A Very Warm, Sometimes Humid Week

By Jason Samenow

Storm threat highest Wednesday

* Outside Right Now? See Radar, Temps & More: Weather Wall *
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* Later: Climate Change and the Scary Jellyfish Scourge *


Today: Partly to mostly sunny and humid. Isolated storm? Near 90. | Tonight: Partly cloudy. 67-72.| Tomorrow: Partly sunny, hot, and humid. Isolated storm? 89-93. | A Look Ahead


Yesterday's dousing rains are behind us, setting up what should be a pretty dry week. The best chance of showers and storms comes Wednesday due to a cold front. Otherwise, most days this week will be partly to mostly sunny, with only isolated storm chances. The heat and humidity will be highest today through Wednesday before modestly waning for the second half of the week.

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 (Monday): Lots of sunshine today in the wake of yesterday's low pressure. Temperatures will climb up to around 90 with moderate to high humidity. Someone could see an isolated thunderstorm pop late in the day, mainly south of the District. Winds will be light, out of the south at about 5 mph. Confidence: High

Tonight: It will be another typically muggy evening with temperatures dropping to within a few degrees of 70. Skies will be partly cloudy and winds calm. Confidence: High

Keep reading for the forecast through the weekend....

The sunset after Friday's storms, taken in Glover Park, Washington, D.C. by CWG photographer Ian Livingston.

Tomorrow (Tuesday): Just like today, anticipate a lot of sunshine and very warm to hot temperatures. The mercury should peak in the low 90s and it will feel several degrees hotter factoring in the humidity (dew points in the upper 60s). Once again, someone could see an isolated storm (20% chance) late in the afternoon or during the evening. Confidence: Medium-High

Tomorrow Night: Partly cloudy and very muggy with lows only in the mid-70s downtown, and around 70 in the cooler suburbs. Confidence: Medium-High


Another image of Friday's sunset from Glover Park. By CWG photographer Ian Livingston.

One more hot and humid day on Wednesday before some mild relief for the second half of the week. Temperatures have a chance to hit 90 for the third straight day. In the afternoon and evening, clouds increase as a cold front slides into the area, giving us a good chance (40%) of showers and thunderstorms. A few of these storms may be strong. Skies slow clear overnight, with lows 65-70 (suburbs-city). Confidence: Medium-High

Cooler high pressure builds in from the northwest for Thursday and Friday. This should drop day time highs into the mid-80s both days with a mix of clouds and sun and lower humidity levels. An isolated storm could still develop either afternoon as weak disturbances aloft ripple through the region. At night, anticipate partly cloudy skies with lows ranging from the upper 60s downtown to the low 60s in the cooler suburbs. Confidence: Medium

Some heat may begin to build next weekend, especially by Sunday. Saturday will probably be seasonably warm with just a slight (20%) chance of a storm and highs in the upper 80s. On Sunday, humidity may increase as temperatures head back towards 90 or even a little higher. The increasing stickiness may bring a higher chance of storms (30%). Overnight lows should be near 70. Confidence: Low-Medium

By Jason Samenow  | August 3, 2009; 5:00 AM ET
Categories:  Forecasts  
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Next: Climate Change and the Scary Jellyfish Scourge


Folks - When do we reach our yearly high averages for this area? Have we already passed them or are we in the thick of them right now?

Posted by: authorofpoetry | August 3, 2009 10:18 AM | Report abuse

Authour, this area typically peaks, in terms of average daily maximum temperature, during the 2nd half of July, though we're only talking a difference of 1 degree or so. So, technically, we're on the downswing. So far, our hottest day was on July 16th, when max-T's ranged from 94-96 at BWI, Dulles, and DCA. So as of now our pattern has matched our climatology. However, we can get well into the 90's through the first week of October.

Posted by: Brian-CapitalWeatherGang | August 3, 2009 10:49 AM | Report abuse

Finally...we're on the way down, though it may be a while before we notice it. After Labor Day, the cool air starts coming in with increased frequency.

Though I have a dance tonight, my biggest dance night figures to be Friday. Hope it doesn't pick THAT evening for another one of those severe-storm flash-flood "training" extravaganzas!!!

Posted by: Bombo47jea | August 3, 2009 12:16 PM | Report abuse

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Posted by: MyStormStory | August 3, 2009 12:20 PM | Report abuse

"well into the 90's through the first week of October":
And just 2 years ago, new records were set in the 90s on the 8th and 9th.

Posted by: CapitalClimate | August 3, 2009 1:54 PM | Report abuse

As a stockholder in GE, I hesitate to point this out, but that's at least the second time the ad for GE Generator Systems has appeared as a comment.

Posted by: CapitalClimate | August 3, 2009 2:21 PM | Report abuse

Whew! I like technically being on the downside of the high temps. When you couple that with the first Octoberfest beer sighting on the shelves and training camp now open, Fall's arrival is becoming more of a reality than a simple hope.

Posted by: authorofpoetry | August 3, 2009 2:35 PM | Report abuse

I'm sure this doesn't really matter to anyone, but I feel the need to point out that I have started visiting this site less, and have commented almost not at all, since "CapitalClimate" reappeared. One of the things that make this blog "go" is the interaction, and "CapitalClimate"'s obvious axe to grind in his incessant commentary has ruined much of the interaction for me.

Again, I am just one reader, but as someone who used to really enjoy this site, I felt I would be remiss if I didn't point this out.

Posted by: SouthsideFFX | August 3, 2009 2:41 PM | Report abuse


Thanks for your comment. While several of us here had some differences with CapitalClimate at times, he has abided by our stated posting policies. His two comments above are fine. In one case, he's providing some value added info about October climatology, and in another case, alerting us to a possible SPAMMER.

In even the most heavily moderated internet forums, you're likely to encounter commenters you don't care for if it's an active community. Your best bet is to try to ignore them if you enjoy the content and interaction otherwise.

So we hope you'll keep coming back and participating...

Posted by: CapitalWeatherGang | August 3, 2009 3:08 PM | Report abuse

Greg - So you majored in meteorology right? Did you minor in psychology or mediation? Very nice post!

Posted by: authorofpoetry | August 3, 2009 3:14 PM | Report abuse

Having been online since before at least some of the fanboyz were born, I am confident that I know the proper use of comments in the blogosphere. If anyone is putting a gun to your head and forcing you to read anything that is posted or linked to here, then I would strongly advise for your own safety and that of others, that you carefully step away from the computer and dial 911.

Posted by: CapitalClimate | August 3, 2009 3:51 PM | Report abuse

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