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Posted at 3:15 PM ET, 07/15/2010

PM Update: Another heat wave beginning

By Ian Livingston

Hot and humid for near future; Weekend rain threat?

* The thunderstorm that saved Washington | Curious case of Tom Sater *
* Outside now? Radar, lightning, temps & more: Weather Wall *

Highs reaching the low-to-mid 90s today are accompanied by fairly uncomfortable dew points in the mid-and-upper 60s. This combination is creating heat indices about 5 degrees higher than the apparent temperature. So, after a bit of a break, it's pretty hot again. As readers of CWG know, today is the 32nd day of the year at or above 90 in D.C. While it looks like we've got a good number more ahead of us in the coming period, with so many behind us already we must be at least half way done... Right?!

Radar & lightning: Latest D.C. area radar shows movement of precipitation and lightning strikes over past two hours. Refresh page to update. Click here or on image to enlarge. Or see radar bigger on our Weather Wall.

Through Tonight: Watch out for a very isolated shower the rest of the afternoon into evening. Otherwise, another mild and muggy evening is ahead as temperatures fall toward the upper 80s around sunset. Skies are mostly clear through the night with readings falling to around 70 in the suburbs to the mid-70s downtown.

Tomorrow (Friday): We turn up the heat another notch tomorrow under full sunshine and a still humid air mass. Temperatures approaching or past 90 by lunchtime should top out mainly in the mid-90s with a few upper 90s possible. Winds should be light from the southwest.

See David Streit's forecast through Monday to see if there's any more rain coming up. And if you haven't already, join us on Facebook and follow us on Twitter.

Drought watch: Despite the multiple rounds of rain, today's update of the "Drought Monitor" kept the area in moderate drought. While it does not include rain that fell after Tuesday morning, it gives a general sense that the area will likely not lose the dry factor entirely unless we get more rain. Drought conditions also expanded north into New Jersey and parts of Pennsylvania. A small evening shower yesterday pushed D.C.'s 6-day total (ending yesterday) to 3.79", the same amount that fell over the 53 days prior to that.

By Ian Livingston  | July 15, 2010; 3:15 PM ET
Categories:  Forecasts  
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Pouring buckets right now in Rosslyn.

Posted by: egengle | July 15, 2010 4:43 PM | Report abuse

And real strong wind for about 5 minutes. Still hard rain but the sky is clearing. When it first started I heard the rain on the windows and looked out to see huge drops.

Posted by: marathoner | July 15, 2010 4:52 PM | Report abuse

Weird thing going on just south of Reston. A storm popped up out of the blue over an hour ago there and hasn't moved. It seems stuck there for over an hour now.

Posted by: rwalker66 | July 15, 2010 5:38 PM | Report abuse

Sunny and hazy blue skies here in Manassas. Booo. Wish it would storm here. *sigh*

Kim in Manassas

Posted by: ksrgatorfn1 | July 15, 2010 5:48 PM | Report abuse

It seems a bit strange that we were "abnormally dry," but then after we finally got some rain, we're in 'moderate drought'

Posted by: spgass1 | July 15, 2010 9:06 PM | Report abuse

That drought meter was good as of Tuesday morning 8AM, before most areas got 2+ inches.

Posted by: LoudounGeek | July 15, 2010 10:02 PM | Report abuse

spgass1, we entered moderate drought in a previous update -- I believe last week. I would expect next week's update to scale back further in some places around here, but probably not completely drought free especially in Va. as many places south of here didnt get that much rain recently. Bottom line is that we still need to get into more of a rainy pattern.

Posted by: Ian-CapitalWeatherGang | July 15, 2010 11:13 PM | Report abuse

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