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Posted at 5:00 AM ET, 08/ 6/2010

Forecast: Brief relief, but no doubt it's summer

By Camden Walker

Welcome break from storms & humidity

updated at 10:45 a.m.

* NOAA still expects active hurricane season | Storms leave mess *
* CWG's Twitter feeds: What info do you want? - Follow us *
* Outside now? Temps, clouds, webcam & more: Weather Wall *
* Number of 90+ days so far in 2010: 46; Record: 67 (1980) *

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


Despite highs still in the 90s, decreasing humidity has me feeling generous with today's digit.
Get the 'Digit' on Twitter


Today: Mostly sunny & hot, but less humid. Low 90s. | Tonight: Partly cloudy. Mid-60s to near 70. | Tomorrow: Sunny, low humidity. Upper 80s. | Sunday: Partly sunny & more humid. Small chance of p.m. t'shower. Upper 80s. | A Look Ahead | Get Express Forecast by E-mail


A. Camden WalkerEnjoy a rain-free and less humid couple of days -- courtesy of the cold front that brought yesterday's damaging storms -- before the "Dog Days" seep back into our region starting Sunday. As with many cold fronts this summer, we won't see a dramatic drop in temperatueres with highs still in the upper 80s to low 90s through the weekend. By Sunday, a small chance of thundershowers coincides with the return of increasing mugginess. Looking ahead to next week? Get ready to bake and sweat 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 (Friday): Gradually decreasing humidity and a decent breeze make today's highs in the low 90s somewhat pleasant. We won't sweat profusely like the past couple days as dew points, which had been in the tropical 70s, slowly fall through the 60s and maybe into the 50s later in the day. Winds increasing to 10-15 mph from the west/northwest feel nice. Just remember that sunscreen or sunblock before enjoying the mostly sunny skies. Confidence: High

Tonight: A nice evening to be out with temperatures falling through the 80s and into the 70s. Lows drop to around the mid-60s outside the Beltway, and around 70 downtown. Not quite open-your-windows weather. But cooler and continued less muggy than the past couple nights, with partly cloudy skies and light winds. Confidence: Medium-High

What do you think of today's weather? Vote your call for today's Daily Digit (see Daily Digit box above). And keep reading for the forecast into next week.

Yesterday afternoon's storm, as seen from Tysons Corner. By CWG photographer Kevin Ambrose.

Tomorrow (Saturday): A little cooler and with continued lower levels of humidity. Highs should top off in the upper 80s. Winds stay light as mostly sunny skies make for what should be a pretty great day. Enjoy it while you can -- before higher temperatures and humidity make a rapid return. Confidence: Medium-High

Tomorrow Night: The evening should feel nice with humidity still in check and temperatures dropping into the 70s. But that tinge of moist air begins to creep back overnight on light breezes from the south/southeast. Lows reach the mid-60s (suburbs) to the upper 60s to near 70 (downtown). Confidence: Medium

Sunday: Temperatures should be similar to Saturday with partly sunny skies and highs likely in the upper 80s. But you'll notice a stickier feeling to the air with humidity back up to at least the moderate range. The increased moisture in the air leads to a small chance (less than 20%) of an afternoon/evening shower or thundershower. Lows Sunday night fall back to the upper 60s to near 70. Confidence: Medium


Monday and Tuesday should both be mostly sunny, hot and humid. Haze and questionable air quality could return as well. Highs attempt a return to the low-to-mid 90s as August is back in full force, unfortunately. At this point, I'm not expecting anything more than the chance of an isolated storm each day. Confidence: Medium

By Camden Walker  | August 6, 2010; 5:00 AM ET
Categories:  Forecasts  
Save & Share:  Send E-mail   Facebook   Twitter   Digg   Yahoo Buzz   StumbleUpon   Technorati   Google Buzz   Previous: Storms move out, more tranquil conditions return
Next: AccuWeather's Bastardi predicts quieter D.C. winter


The humidity is sure taking its sweet old time getting out of here! Has the front even passed through yet?

Posted by: HenryFPotter | August 6, 2010 6:42 AM | Report abuse

No need to check Skew-T this morning. CAPE is probably below severe criteria, and precipitable water should be lower. Most of the real damage is to my east in Fairlington, Alexandria and Oxon Hill.

Howard Bernstein is predicting 101 on Wednesday, fortunately I'm heading for Wisconsin that day. Will be out of town one week (8/11--8/18)for a high school reunion, etc.

Posted by: Bombo47jea | August 6, 2010 7:45 AM | Report abuse

Hey guys how much rain did we get yesterday? My layman's guess without measuring is 3". Quite a pounding we got yesterday.

Posted by: j0nx | August 6, 2010 7:57 AM | Report abuse

HenryFPotter - slowly but surely the humidity is heading out! Front has passed through, but in summer, there is lag time often with the cooler dryer airmass behind it, establishing itself

Bombo47jea - lucky! I am worried about the heat next week. Upper 90s look increasingly likely..

j0nx - I don't think many spots got over 1", but I will look around some more. They were heavy but quick-moving storms (their forward speed contributed to the wind damage in the region)

Posted by: Camden-CapitalWeatherGang | August 6, 2010 9:01 AM | Report abuse

At this point in the summer, I am okay with heatwaves. I don't like the ones that occur in June, when we have so much of summer left. I'm not saying I like the heatwaves, but hopefully we've had more hot ones behind us than ones in front. So long as the air conditioning doesn't break, or storms don't knock our power out, I am cool with it.

Posted by: authorofpoetry | August 6, 2010 9:57 AM | Report abuse

I had some real damage from the storm yesterday. Several heavy limbs down in the yard, one of which crushed a gutter and damaged the roof on its way down. Plus the power is out and PEPCO's offering no guess as to when it might be back.

Posted by: mhardy1 | August 6, 2010 10:02 AM | Report abuse

I also have a question about rainfall. Your Almanac says IAD got just over an inch yesterday. I live a few miles southwest of that...Granted I have no scientific collection devices, but I have a flat bottomed bowl with flat sides that is about 3 inches high. It filled up almost twice with rain. WAAAAAAY over the 1" the official stats are listing. How is this possible?

Posted by: silencedogoodreturns | August 6, 2010 10:09 AM | Report abuse


The heaviest rain was very localized. Locations just a few miles to the south and southeast of Dulles -- according to Doppler estimated rainfall totals -- were in the two to three inch range...but it was a limited area.

Posted by: CapitalWeatherGang | August 6, 2010 10:32 AM | Report abuse

authorofpoetry - I think I understand where you're coming from. August is when we've mostly acclimated to heat. I know I have, whether I've wanted to or not! I like seeing the light at the end of the tunnel (autumn); however, we need to watch next week.. it could really heat up :-/ ugh

mhardy1 - so sorry for your troubles. It has been really rough for the region. Power keeps going out for so many people. Very unpleasant (having no a/c and property damage). eeesh.

Posted by: Camden-CapitalWeatherGang | August 6, 2010 11:03 AM | Report abuse

Camden - Exactly. I think a certain part of it is psychological. You are starting to see Fall's flavors already being marketed so no matter how hot it gets, it won't feel as hot as if it were June 6th. Of course, there is 'too hot,' and I am sure you'll find me on here whining about it next week.

Posted by: authorofpoetry | August 6, 2010 11:21 AM | Report abuse

i know the hottest days of the year are around july 22 or so. from that point on, average highs begin to drop. but some people think august somehow seems hotter... i read somewhere, maybe here, that august is more humid. so, are records kept for "humiture" or "heat index" or maybe it's even dew points for july and august? basically, is there any data to back up the notion that august "feels" hotter?

Posted by: walter-in-fallschurch | August 6, 2010 11:46 AM | Report abuse

Camden, the storms trained over the area so they were not terribly quick moving if you factor that in.

Posted by: Ian-CapitalWeatherGang | August 6, 2010 12:34 PM | Report abuse

My "rain bucket" on the deck in Centreville measured 2.5 inches yesterday.
It was a LOT of rain, but thank goodness without the drama of falling trees & lost power.

Posted by: FIREDRAGON47 | August 6, 2010 12:44 PM | Report abuse

so I see FIREDRAGON47 & silencedogoodreturns both have different rain measuring devices ;-) allow me to point out that NWS/NOAA-approved rain gauges really are the best & only truly accurate devices that adhere to the proper geometrics.

To measure liquid precipitation-fall in the full spectrum of weather it has to be a somewhat protected hollow cylinder. To measure volume of a hollow cylinder, well, I can't use symbols in this text box. So check out:

Posted by: Camden-CapitalWeatherGang | August 6, 2010 1:00 PM | Report abuse

walter-in-fallschurch, using the info I found (link below) I have found the following supporting evidence that August (so far this year) has been more humid than May, June, July
May avg dewpoint = 54 (24-70F range)
June avg dewpoint= 62 (39-74F range)
July avg dewpoint= 64 (40-76F range)
Aug avg dewpoint = 68 (60-75F range)

remind me to check again at the end of this month?

Posted by: Camden-CapitalWeatherGang | August 6, 2010 1:44 PM | Report abuse

GFS MOS guidance is already pumping out 100 for next Wed at DCA, with some upper 90s around it. That's pretty bullish for this range, especially since it factors in climo norms.

Posted by: Ian-CapitalWeatherGang | August 6, 2010 1:45 PM | Report abuse

I believe it's possible for "training"
storm cells to move rapidly--depends on the "storm direction" airspeed not on where the cells are forming.

Not sure if Tom Sater may have been doing the weather rather than Howard Bernstein--Channel 9 says Bernstein is on leave today...Sater was doing the noon weather. According to Tom Skilling, the train of MCS' affecting Chicago has shut down for the moment, but more heat is due out there next week...they have five days of nineties on deck after Sunday...could mean more heat here. Wisconsin outlooks [Eau Claire area] have highs in the eighties to ninety next week. websites are for WEAU-13 or WQOW-18 in Eau Claire. The Rhinelander TV station also gives good Northwoods predictions. Hope to find some of that Leinenkugels Summer Shandy [beer + lemonade] up there...I see the Baileys Crossroads Giant has it back in stock.

Posted by: Bombo47jea | August 6, 2010 2:50 PM | Report abuse

thanks camden. looks like there might be something to the idea of july being hotter, but august feeling hotter.

Posted by: walter-in-fallschurch | August 6, 2010 3:36 PM | Report abuse

Camden - I hear ya, but we've killed 3 rain gauges in the past couple years. The galvanized steel straight sided water bucket will have to serve.......until perhaps Santa brings me a fancy weather station unit.

Posted by: FIREDRAGON47 | August 6, 2010 6:15 PM | Report abuse

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