wpostServer: http://css.washingtonpost.com/wpost2

Most Read: Local

Posted at 11:00 PM ET, 07/26/2012

PM Update: More heat and storm chances Friday

The Severe Thunderstorm Watch has been cancelled except for Prince George’s and Anne Arundel counties. A few gusty showers with a bit of lightning remain in the area but should dissipate or move away over the next hour or two. Ovenight lows only fall to the mid-70s to near 80.

Tomorrow (Friday): With a warm start to the morning, we should be off to the races in no time. Think today, but perhaps with a little less humidity if we’re lucky. Highs should reach the mid-90s to near 100 under partly cloudy skies. Storm chances are up late in the day, to about 30% or so, perhaps rising into the evening. Given the heat and winds aloft, any storms might become strong or severe with wind the main threat.

See David Streit’s forecast through the weekend. And if you haven’t already, join us on Facebook and follow us on Twitter. For related traffic news, check out Dr. Gridlock.

100 degrees, again: The high temperature in Washington, D.C. has hit 100 today for the eighth time this year, which puts 2012 in second place for 100-degree days behind the 11 in 1930. It’s also the seventh 100-degree day this month - a record for the most 100-degree days in any month. While D.C. fell short of today’s record of 103, Dulles tied its record for the date with a high of 98.

Pollen update: Grass, tree and weed pollen is currently LOW across the area (grass is MODERATE for the area, LOW overall). Mold spores are also in the LOW range.

Keep reading for earlier storm updates...

9:40 p.m. update: The closest severe storms are currently up around the Baltimore metro area and headed east. Scattered showers and storms are moving through the far west, northwest and north D.C. suburbs and may work their way closer to the city over the next couple hours. Most of these may remain below severe levels, but always head indoors if you hear thunder.

8:05 p.m. update: The storms to our north have had trouble making it much further south than the Maryland-Pennsylvania border. But we still need to watch a line of strong to severe storms in West Virginia and Western Maryland. If they make it to the D.C. area, and that’s uncertain as of now, it would be after 9-10 p.m. with the best chance north of D.C. Isolated pop-up storms could form before then - again northern suburbs have the best chance.

6:40 p.m. update:A severe thunderstorm watch has been issued for the entire area until 1 a.m. Storms are currently lined up from northern West Virgina through southern Pennsylvania. Movement is mainly to the east, but there is also a bit of a southeast push. It’s still somewhat uncertain how much of this storminess will impact the immediate area, but for now, the further north you are, the better your odds remain. Additional storms further west may be the ones to really watch, but they’re still several hours out.

From 4:45 p.m...

After morning clouds slowed temperature rises for a bit, the sun broke through and turned things toasty and pretty gross. Along with highs in the mid-and-upper 90s, we’ve been unfortunate enough to have heat indices as high as 105 to 110 thanks to oppressive humidity. The major severe weather event ongoing to the north should largely stay there, but we’ll watch to see if it skirts the area, as well as for some “home grown” pop ups before the day is out.

Through Tonight: While we don’t expect widespread severe weather, we can’t rule out a few storms. Anything that does form in this environment could easily go severe, and in fact Storm Prediction Center has placed northern parts of the area under a moderate risk of severe storms. The main threat would be damaging winds with any storm, along with heavy rain and lightning. Chances of seeing a storm are around 20-40% (highest odds north). If you don’t get any rain, don’t expect to cool off fast. Lows only reach the mid-70s to near 80 most spots.

Severe weather: Severe storm watches currently line up from western New England back into southern Missouri as a very active afternoon takes shape to our north and west. Reports of numerous trees down are already coming in across Pennsylvania in particular. The squall line to our north is expected to quickly travel toward the East Coast, putting cities like Philadelphia and New York in the path of potential widespread damaging winds.

By  |  11:00 PM ET, 07/26/2012

 
Read what others are saying
     

    © 2011 The Washington Post Company