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Posted at 5:00 PM ET, 07/25/2009

Forecast: Summer Heat & Storms Arrive

By Brian Jackson

* NatCast | Outside Now? Temps, Clouds & More: Weather Wall *
* Moon & Weather | NASA Tweetup | Humidity Misconceptions *

EXPRESS FORECAST

Today: Partly to mostly sunny. 25% chance of a t-storm. 90-93. | Tonight: Partly cloudy, sticky. 72-75. | Tomorrow: Partly to mostly cloudy. Good chance of p.m. storms. 88-91. | A Look Ahead

FORECAST IN DETAIL

You asked for it. Well, at least some of you did. More typical summertime weather has settled into our area. Personally, I was quite content with the cooler, drier weather we'd been enjoying. Hot and humid conditions are expected this weekend and right through much of the coming week. Those A/C units will finally get a good workout. With the heat and humidity comes a daily chance of afternoon thunderstorms, some days greater than others.

Today (Saturday): Our more typical summer weather continues today with heat and humidity reminding us what we've been "missing." Partly to mostly sunny skies and afternoon winds from the south around 10-15 mph should push highs into the low 90s. Look for a small chance (25%) for an afternoon/evening thunderstorm. Confidence: Medium-High

Tonight: After growing up in upstate New York, one thing I dislike about summer south of the Mason-Dixon Line is the ridiculously (compared to up north) warm overnights. I wish I could shake the hand of whoever invented central air. It's likely to be one of our warmest/muggiest nights of the summer to date with lows only dipping to the mid-70s in town and probably not below the low 70s in the suburbs. Confidence: High

The heat is on, but for how long? Keep reading...

Tomorrow (Sunday): Heat and humidity continue tomorrow. But with more clouds, temperatures might not get quite as hot. Expect partly to mostly cloudy skies and afternoon highs near 90. A cold front approaching from the west could spark (50% chance) some potentially strong afternoon thunderstorms. Winds will be out of the southwest around 10-15 mph. Confidence: Medium

Tomorrow Night: Shower and thunderstorm chances continue into the overnight until the front passes through. We'll stay quite sticky, with mostly cloudy skies and lows only dropping to the low 70s to near 70. Confidence: Medium

A LOOK AHEAD

Monday and Tuesday dial up more of the same, as tomorrow's cold front won't do much to cool us down or dry us out. Scattered showers and thunderstorms are a possibility each afternoon and evening. Skies will have a fair share of cloud cover. But with this subtropical air mass we should still see afternoon highs approaching the upper 80s to near the 90-degree mark. Confidence: Medium

By Brian Jackson  | July 25, 2009; 5:00 PM ET
Categories:  Forecasts  
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Comments

Figures I would mention central air. I'm moving into my new apartment today and the AC doesn't work! Ugh.

Posted by: Brian-CapitalWeatherGang | July 25, 2009 10:26 AM | Report abuse

I am also a fish out of water. I am from Rome, New York. My wife is from Minnesota and Montreal. Where are you from?

Posted by: hawkprevo | July 25, 2009 2:17 PM | Report abuse

Whine, whine you could be out in the Seattle Tacoma area next week where they will have dangerous heat for them with temps near 100 and most places don't have AC.


Do tell your Fed friends in the Seattle area to check out the OPM regs on how hot it has to be in your office before you get set home!

Posted by: omarthetentmaker | July 25, 2009 3:28 PM | Report abuse

Another harbinger of this extended hot spell, soon to be an official HEAT WAVE [3 straight days of 90+]:

The figeaters are out! Figeaters or green June bugs are those large green metallic beetles who buzz around the lawn like bumblebees on hot summer days. They are a bit late this summer; usually the first figeaters start flying around during the hot humid weather in June or early July. This is our first big hot spell--and you can probably blame AugustaJim. Please recall that a week ago he started calling for his much-needed rain, along with an extended "Bermuda High" hot spell [which could now affect us till Labor Day or later!] Except for Thursday evening, we didn't get the rain--but we're sure getting the heat & humidity!

Frankly I'd prefer a return of the nice continental polar air we were getting before this protracted warm spell settled in.

Posted by: Bombo47jea | July 25, 2009 4:07 PM | Report abuse

Um, storms are getting quite close to the western suburbs...

Posted by: bikerjohn | July 25, 2009 4:44 PM | Report abuse

Cap Wx Gang, I am going to the Nats game tomorrow which starts at 1:35. Will the thunderstorms be a threat before, during, or after the game?

Thanks!

Posted by: david_in_stafford | July 25, 2009 4:50 PM | Report abuse

I hope the storms taper off for once so that the concert at Wolf Trap doesn't get rained out! Oh, the joy of lawn seats...

Posted by: kridgely | July 25, 2009 5:26 PM | Report abuse

In the beltway, the storms are acoming... Wind really picking up and swirling in Arlington. While the storms may pass north, it's going to be close.

Posted by: JJones-CapitalWeatherGang | July 25, 2009 7:22 PM | Report abuse

Here in beautiful downtown Silver Spring, we are getting the whole shebang of a summer thunderstorm: sudden onset, high winds, piles of rain, etc.

Posted by: Lindemann777 | July 25, 2009 7:30 PM | Report abuse

Falls Church: the tops leaves of the treees are swirling like egg beaters.....the wind here has turned gusty.

Posted by: tbva | July 25, 2009 7:31 PM | Report abuse

Torrential rains and high winds with a severe thunderstorm in N. Stafford.

Posted by: david_in_stafford | July 25, 2009 8:00 PM | Report abuse

Eastern Loudoun: Heavy storm seems to have passed. Heavy rain for about 20 min or so. It's dark out..

Posted by: LoudounGeek | July 25, 2009 8:13 PM | Report abuse

Just received the news from my neighbor that there was a large tree down on Rt. 610 (Garrisonville Rd) due to the high winds.

Posted by: david_in_stafford | July 25, 2009 8:25 PM | Report abuse

Power was out for a good 2 hours here in Eastern Loudoun due to a downed tree.

Posted by: amorris525 | July 25, 2009 9:15 PM | Report abuse

Nice and cool up there, doesn't get below 80 at night here in Miami it's been like that for months, and the humidity feels like 120%

Posted by: sgtpepper1 | July 25, 2009 9:48 PM | Report abuse

Not sure why todays storms were not warned!!! Reports of trees down in Culpeper County along with power outtages. The cell that came through Culpeper this afternoon was showing 65 dbz according to GR3AE! Not sure why at least that cell was not warned but the NWS dropped the ball on that one. I'm assuming that it did not meet Severe "criteria". IMO they should refine there "criteria" when a storm rolls through and knocks out power and downs trees, I would think it would be a Severe storm.

Posted by: RWJ1990 | July 25, 2009 11:03 PM | Report abuse

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