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Posted at 4:25 PM ET, 07/ 4/2010

Forecast: Here comes the heat

By Brian Jackson

Temperatures close in on 100 this week

* Planning a holiday cookout? Beat the heat! *
* Follow CWG on Facebook and Twitter | Weather Wall *

Today's Daily Digit
A somewhat subjective rating of the
day's weather, on a scale of 0 to 10.


Though it's hot, at least it's not humid. Giving the digit an extra bump in honor of Independence Day.
Get the 'Digit' on Twitter


Today: Sunny and very warm. Low-to-mid 90s. | Tonight: Mostly clear. 66-73. | Tomorrow: Mostly sunny, hot! Upper 90s. | A Look Ahead | Get Express Forecast by E-mail


Well, we knew summer wouldn't let us get away with picture perfect days in the low-to-mid 80s all season long. But it's a shame that our reality check has to come on a day where many of us will be outdoors for a good portion of it. While it might be a scorcher temperature-wise, humidity should still be low enough that it won't be brutal. As we continue into the week, temperatures close in on a return to 100, and higher humidity levels begin to make themselves known once again.

Temperatures: Latest D.C. area temperature map powered by iMapWeather (base map by Google). Click and hold on map to pan. Double-click to zoom. Refresh page to update. See larger map on our Weather Wall.

Today (Independence Day): Hot, to be sure. But with relatively low humidity levels and little/no chance of rain, we can't really ask for a much better July 4th. I'm sure most will be celebrating outside this afternoon so bring along the sunscreen and cold water. Bright, sunny skies rule overhead and our afternoon highs climb into the 90s. There won't be much of a breeze to speak of, so hopefully you've got a pool nearby. Confidence: High

Tonight: During the overnight, there won't be the same crispness to the air as in recent nights. Still -- it won't really be muggy either, with lows in the 60s in the cooler suburbs to the low 70s downtown. Winds remain light, primarily from the southwest. Confidence: High

Will the heat break anytime soon? Keep reading for the forecast through midweek....

Tomorrow (Monday): If you're planning on using your day off to get any chores done around the house, let me urge you to get them done early. Blistering heat returns to the mid-Atlantic region, with highs here in the upper 90s under mostly sunny skies. Winds will be light, from a westerly direction, and humidity still shouldn't be terribly high. Confidence: High

Tomorrow Night: Skies will be mostly clear but lows only dip from near 70 in the cooler suburbs to the mid-to-upper 70s downtown as humidity levels slowly climb. Confidence: Medium-High


As we all head back to work on Tuesday and Wednesday, we'll get no relief. We'll see mostly sunny skies with some spotty afternoon clouds popping up and highs in the upper 90s to near 100. Humidity levels won't be too oppressive, though it will be noticeable, especially at night, with lows only dropping into the 70s. Confidence: Medium-High

By Brian Jackson  | July 4, 2010; 4:25 PM ET
Categories:  Forecasts  
Save & Share:  Send E-mail   Facebook   Twitter   Digg   Yahoo Buzz   StumbleUpon   Technorati   Google Buzz   Previous: NatCast: At least it's a dry(ish) heat
Next: Forecast: Blistering heat takes hold


Thinking outside the July sweatbox, did Bob Ryan take the golden shovel with him when he changed channels?

Posted by: JerryFloyd1 | July 4, 2010 7:08 AM | Report abuse

Happy 4th CWG & fellow weather watchers!
Tip for the day: Mosquitoes HATE smoke bombs.

Posted by: FIREDRAGON47 | July 4, 2010 10:59 AM | Report abuse

Happy 4th, all. Looks like quite a heat wave here if possibly shorter than the last. If, and it looks possible, we hit 100 2x we'll already be up with only 10 other years in history for 100+. However, 6 of the 10 with 3+ 100 degree days were since 1980, none since 1999.

Posted by: Ian-CapitalWeatherGang | July 4, 2010 11:03 AM | Report abuse

Let's all say a prayer to the Air Conditioning gods....

May I ask why there isn't a threat of storms when it is going to be so hot and humid? I thought that once it gets so hot, etc that the chance was also there....

Posted by: hereandnow1 | July 4, 2010 11:06 AM | Report abuse

I am going to take a stab at your question.
We are under the influence of a high pressure system. The air is relatively dry (dewpoints below 60 and R.H. in the vicinity of 30%) and stable. We are lacking a trigger (an unstable air mass or some sort of lifting influence). Therefore we are going to be hot, not too muggy, and dry.
Tomorrow and especially Tuesday through at least Thursday we will be hot and muggy with just an outside chance of a pop up thunderstorm as the air becomes a little more unstable.
Hope this helps.

Posted by: pjdunn1 | July 4, 2010 1:03 PM | Report abuse

Happy 4th everyone! Getting ready to go to Great Meadow for family time and fireworks tonight! Never been there before, so I'll give a review upon our return.

Got the sunscreen, bug repellent, sodas, water, etc. Today's word --HYDRATE. We also have the packets to make Gatorade (to replenish electrolytes) because of the heat.

Enjoy, everyone!

Posted by: southbridgemom | July 4, 2010 1:59 PM | Report abuse

Another hot streak will crank up the A/C bill if nothing else. But next decent rain chance comes on Tuesday Jul 13th. That's 2 weeks for measly half inch of liquid from heaven. For a second I thought we were living in the desert. (For the record, Las Vegas, NV AVERAGEs .44 in for the month of July)

Happy 4th everyone.

Posted by: LoudounGeek | July 4, 2010 2:23 PM | Report abuse

Tuesday the 13th gets me past my big dance this coming Friday...there's still a 20% rain threat that evening, the 9th.

If the atmosphere is well "capped" by an inversion layer, it's hard for rain to form even with very high dewpoints...just ask someone around the Persian Gulf where temps can hit 110 with dewpoints in the high seventies or low eighties. Possible troughs or vorticity lobes around here can spark airmass convection before Friday by weakening the "cap". This would be most likely around late afternoon or early evening.

Posted by: Bombo47jea | July 4, 2010 2:58 PM | Report abuse

There has also been a bit of modest speculation regarding next winter. The pattern shapes up to be some sort of La Nina with a negative NAO, among other large-scale patterns. The PDO [Pacific Decadal Oscillation] figures to be positive. One of the close analog seasons is the 2009/10 winter of two years ago--little snow, but a large number of non-accumulating flurries...the one big accumulation was in early March just outside meteorological winter. The message: Expect far less snow than last season, perhaps less than ten inches for the whole season,

Posted by: Bombo47jea | July 4, 2010 3:24 PM | Report abuse

No rain since June 3, 32 days, with little or no rain in sight. My early winter outlook is 4 above temps, 3-4 degrees, & very little snow.

Posted by: VaTechBob | July 4, 2010 3:45 PM | Report abuse

This week's forecast is expletive deleted horrible and the idea of little snow next winter is just as expletive deleted.

After the July-September inferno of 1980, there was a very little snow in 80-81, but then the next two winters' snowfall came in about 50% above average.

A snowy whale will swim in Falls Church sometime in the next 2-3 winters!

Posted by: JerryFloyd1 | July 4, 2010 8:49 PM | Report abuse

Hope everyone had a happy 4th. Very warm and a touch humid, but was still pretty decent weather for fireworks. Nice that we didn't have to worry whatsoever about t'storms today/tonight. Wish we could get some raindrops timed for the coming work week, though looks unlikely through at least Wednesday.

Posted by: Dan-CapitalWeatherGang | July 4, 2010 10:51 PM | Report abuse

Just saw a fireworks rebroadcast on Channel 26. They were promising us a "much better" fireworks display than in previous years...

Maybe in quantity, but certainly more of the same in QUALITY...I will believe this spiel on "better fireworks display" when I start seeing images of Washington, Jefferson, Lincoln, etc. in pyrotechnic form...I believe they now have the technology to do this!

And another question of relevance...were these fireworks made in the USA, or did we just shoot off a few million dollars worth of Chinese imports???

Gosh, it's fun to be watching "Cheaters" now, while I await "much-needed-rain's" latest plot to spoil my Friday night dance @ the Elks Lodge with a power-busting bout of severe weather the evening of July 9th. At least the Tuesday night dance at Clarendon Ballroom looks safe, though the night could be sultry--CB always has great AC.

Posted by: Bombo47jea | July 5, 2010 12:26 AM | Report abuse

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