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Posted at 3:20 PM ET, 05/26/2010

PM Update: Heat and humidity clobber region

By Ian Livingston

Storms tomorrow? How's the weekend look?

* When a drought is not a drought | Revolving doors in TV weather *
* Outside now? Radar, temps & more: Weather Wall | UnitedCast *

The sun made a pretty solid return today, though there are still some lingering clouds out and about. Temperatures are climbing to and past the highest levels we've seen since the first days of the month as highs reach the upper 80s and low 90s. Good news for people wanting a little more spring? We're already halfway through this summer preview, though tomorrow's part two is looking a little more intense on both the heat and humidity side.

Webcam: Latest view of D.C. from the Netherlands Carillon at Arlington National Cemetery. Courtesy National Park Service. Refresh page to update. See this image bigger on our Weather Wall.

Through Tonight: A summery evening and overnight is ahead -- thankfully we'll see mostly clear skies. Temperatures fall through the 80s as we head toward sunset. Dew points now in the mid-60s will stay in that range or continue to slowly rise toward 70. There's no mistaking those numbers as humid! With all the moisture in the air, lows only fall to around 70 across the area.

Tomorrow (Thursday): Thursday is looking like one of those days where you'll sweat waiting for the bus in the morning and then again each time you head outdoors. Lots of sun helps temperatures soar through the 80s by lunchtime before ending up near 90 and into the low 90s during the afternoon. By evening, thunderstorms that should form well to our north may be charging south into the area. Any storms could be strong to severe, with wind damage a threat.

See Dan Stillman's full forecast through Memorial Day. And if you haven't already, join us on Facebook and follow us on Twitter.

By Ian Livingston  | May 26, 2010; 3:20 PM ET
Categories:  Forecasts  
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Next: Forecast: Steamy day sets stage for thundery night


Posted this a few minutes ago in morning update but will ask question re: it here.

Now that it appears that the front passing thru on Friday is gonna hang up just to our south, keeping us in clouds, showers and an easterly wind into Saturday, when will we see an improvement in the weather?

Could this linger into Sunday too?

Posted by: ThinkSpring | May 26, 2010 3:35 PM | Report abuse


Looking at the latest GFS and NAM runs, it appears that the stormy weather may hold off until after sunset tomorrow evening. Is this a fair assessment or is there something else that leads one to believe that the storms up north will make it into our area before the sun sets? Gotta cut two lawns before they are too wet or else wait until Sunday when they dry out and are too long. UGH!

Posted by: pjdunn1 | May 26, 2010 3:43 PM | Report abuse

any idea on timing of tomorrow night's t-storms? are we talking early or late evening? thanks in advance!

Posted by: rhingo | May 26, 2010 3:53 PM | Report abuse

In terms of overall morning mugginess here, what's the worst that it can get? Temp + dewpoint (or humidity) please. I usually walk to my metro station about 7:30 am and need to either 1) take the bus or 2) run to it in my shorts and take a shower at work. Thanks.

Posted by: jojo2008 | May 26, 2010 4:12 PM | Report abuse

pjdunn1, I would tend to lean toward later evening or into the early overnight... maybe 6-11 (or centered somewhere around sunset)? But something could sneak in before that. I'm still not totally sold we'll get a lot of action but given the instability etc whatever does make it in could be fairly strong.

Posted by: Ian-CapitalWeatherGang | May 26, 2010 4:37 PM | Report abuse

As usual, thanks a bunch Ian! Always can count on you and the gang.

Posted by: pjdunn1 | May 26, 2010 4:42 PM | Report abuse

jojo2008, Once you get into the upper 60s or around 70 for a dew point I don't think there are many who would argue it's not that humid... so you're nearing as muggy as it typically gets. I think we'll end up staying a bit below the "oppresive" level (which in my head is about 70+ for dews) but not far. That said, those types of readings are fairly common during the summer here. It's more rare once you get into the 75-80 range for dew points. So, tomorrow morning should not be too much different than your normal summer morning.

Posted by: Ian-CapitalWeatherGang | May 26, 2010 4:45 PM | Report abuse

Highs: DCA, 90.. IAD, 87.. BWI, 91. Southern New England was roasting. Bradley airport near Hartford hit 99.. highest May temp (tied) on record.

Posted by: Ian-CapitalWeatherGang | May 26, 2010 5:36 PM | Report abuse

Thanks. Yesterday morning wasn't that bad in terms of walking. Lunchtime was. I walked to Union Sta. and my back was drenched. Just wanted to know what to look for.

Posted by: jojo2008 | May 26, 2010 11:31 PM | Report abuse

Two items in off the weather board...

1) There's talk of "very large hail" with tomorrow's severe weather...1" to 2" was mentioned. Largest hail I've seen here was golf-ball size, on two occasions, both in August.

2) Discussion of a severe heat wave in site had 53.5 Celsius, [128+ Fahrenheit], fifth hottest temperature recorded worldwide. For everyone's information, the site is Mohenjo-Daro, one of the major historic sites of ruins from the mysterious, and still little-known Indus Valley civilization...we may surmise that a prime reason for the complete disappearance of the Indus Valley civilization involved intense heat waves and drought, perhaps climate change, Mr. Q.

Posted by: Bombo47jea | May 27, 2010 12:04 AM | Report abuse

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