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Posted at 11:00 PM ET, 06/23/2008

Storms Winding Down

By Ian Livingston

*Severe Thunderstorm Watch canceled.

ALERTS

10:45 PM: Thunderstorms are now weakening as they head east through southeast Montgomery County and northern Prince George's County towards Anne Arundel County. This should be the last of the storms, with gradual clearing and cooler air filtering in overnight.

Refresh the page to update alerts above. Monitor the progress of storms and the latest warnings, as they are issued by the National Weather Service, using the Severe Weather Tracking Station below, and see our full forecast below that.

Severe Weather Tracking Station
Warning Text: DC | MD | VA
Radar: Latest D.C. area radar loop from Weather Underground. Click here to zoom. Refresh page to update.
LWX Warnings
Warnings: Severe warnings from the National Weather Service. Automatically reloads every minute (most browsers).

3:15 PM Forecast: Typical late-June warmth mixed with a small dose of humidity and an approaching cold front are once again combining to spark thunderstorms this late afternoon, with additional thunderstorms likely during the evening. The main severe threats with the strongest storms will be damaging winds and/or hail.

Tonight: Thunderstorms, some of which are likely to be strong and possibly severe, clear the area by around 11 p.m., followed by a risk of spotty showers until after midnight. Temperatures will fall to the low 60s in the suburbs and mid 60s in the city as a drier northwest wind blows up to 10 mph.

Tomorrow: Tuesday will be less humid than today, but still warm and quite sunny. Expect highs to reach into the mid and upper 80s while a dry northwest wind continues and gusts to 15 mph at times. Six (today's storms could make seven) of the last ten days have featured a thunderstorm report at National Airport, and isolated afternoon thunderstorms cannot be ruled out on Tuesday.

Check out NatCast for tonight's game, and Jason's increasingly warm and humid forecast for the rest of the week and into the weekend. Keep reading for expired alerts

EXPIRED ALERTS

9:45 PM: During the next 45 minutes, the strong thunderstorm currently in northern Fairfax County near Vienna will cross the beltway and move through Tysons Corner and McLean. It will then affect the northern half of the District, Chevy Chase, and Bethesda before heading towards the northern half of Prince George's County. The storms may weaken some as they head east but will still be capable of producing gusty winds and heavy rain.

9:00 PM: A Severe Thunderstorm Warning is now in effect for Fairfax and Prince William Counties. Two separate storms will impact these counties. The stronger storm is headed into Fairfax County and will impact Oakton, Reston, Vienna and the Tysons area in the next 45 minutes. It should approach southern Montgomery County and northwest DC in just about an hour. Small hail and gusty winds are possible with these storms.

8:45 PM: Severe thunderstorm warnings are in effect for Loudoun and Fauquier Counties. These storms are headed due east and may impact Fairfax and Montgomery Counties and the District in the next hour and a half. The storms, stronger than storms earlier tonight, may produce nickel size hail and winds in excess of 60 mph.

8:10 PM: All severe thunderstorm warnings have expired in the immediate area. A strong storm is passing over the Potomac River into Prince George's County. Isolated strong to severe storms have developed to the west, and one will enter Loudoun County over the next 30 minutes. Additional storminess is possible across the metro area over the next several hours.

7:20 PM: A Severe Thunderstorm Warning continues until 7:45 p.m. for northern Charles and southern Prince Georges counties. This storm has weakened a little recently, but is still capable of producing penny-sized hail and wind gusts to 60 mph, in addition to heavy rain and frequent lightning. Additional storms are beginning to develop to the west of the area and may continue to strengthen as they drift towards the region. A beautiful double-rainbow has set up over portions of the area as sunshine comes out behind the first batch of storms.

6:50 PM: The storm moving eastward out of northeastern Prince Georges County and through Anne Arundel County has prompted a Severe Thunderstorm Warning for those areas until 7:15 p.m. Another area of strong storms has triggered a Severe Thunderstorm Warning until 7:45 p.m. for northern Charles and southern Prince Georges counties. Both areas of storminess are capable of producing penny-sized hail and wind gusts to 60 mph, in addition to heavy rain and frequent lightning.

6:20 PM: Only one severe thunderstorm warning remains in effect -- and that's for the storm in Prince William County headed towards southern Fairfax County. The northern fringe of the storm may graze the District around 7 p.m while heading into southern Prince George's and northern Charles County. Another storm, which is strong but not severe, is impacting northwest Prince George's County near College Park. This storm will continue eastward towards Anne Arundel county by 6:45 p.m.

5:55 PM: A thunderstorm is currently developing over the District and will move eastward into Prince George's County in the next half hour.

5:45 PM: Severe Thunderstorm Warnings remain in effect mainly southwest of the District. These storms should continue moving northeastward, mainly missing DC proper but affecting Prince George's and Charles Counties in the next hour. At the same time, another storm will impact northwest Fairfax and Montgomery Counties. A second batch of storms, developing near Culpeper, Va. and extending into Fauquier County (which are currently severe) may impact the southern parts of metro area, and possibly the District, between 7 and 8 p.m.

5:10 PM: Severe Thunderstorm Warnings are in effect in across portions of the western suburbs. One area of strong storms is moving through the northern part of Stafford and southern Prince William counties. Severe storms are also affecting parts of Loudoun County, with a new batch now moving into western Fauquier County. All of this activity, which may include penny-sized hail and wind gusts to around 60 mph, is expected to progress eastward across the metro area during the late afternoon and evening, with additional storms developing behind and ahead of the current activity.


4:50 PM:Northwestern Montgomery, south central Frederick and northeast Loudoun counties are under a Severe Thunderstorm Warning until 5:45 p.m. This is a northeastward extension of the Severe Thunderstorm Warning for southeastern Loudoun County that remains in effect until 5:30 p.m. New locations that could be impacted with penny-sized hail and wind gusts to 60 mph include Poolesville, Germantown and Gaithersburg. This storm appears to be weakening quickly, though there are more forming behind it to the west.

4:40 PM: A batch of storms southwest of D.C. has sparked a Severe Thunderstorm Warning until 5:30 p.m. for Fauquier and eastern Culpeper counties. Locations impacted include Bealeton, Remington and Opal. Penny-sized hail and wind gusts to 60 mph are possible in the warned area.

4:30 PM: A Severe Thunderstorm Warning has been issued until 5:30 p.m. for southeastern Loudoun County, where a storm has developed capable of producing penny-sized hail and wind gusts to 60 mph. Leesburg, Ashburn and Dulles Airport are among the locations that could be impacted by this storm.

By Ian Livingston  | June 23, 2008; 11:00 PM ET
Categories:  Forecasts  
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Comments

looks like the nasty stuff might pass to the south of the district. i'm headed to the nats game tonight - any ideas on rain delay?

Posted by: Rishi | June 23, 2008 5:01 PM | Report abuse

Posted by: Ian, Capital Weather Gang | June 23, 2008 5:09 PM | Report abuse

Does anyone have an explanation for this really strange cloud pattern that I saw last Saturday? My sister suggested a series of jet contrails, but I think there's a natural cause. Here's the mysterious picture: http://tinyurl.com/622v3w

Posted by: mcleaNed | June 23, 2008 5:12 PM | Report abuse

Ian,

The Severe Thunderstorm Warning for n Loudoun, s/w Frederick, and w Montgomery (here: http://www.weather.gov/view/prodsByState.php?state=MD&prodtype=warnings) is not showing up on Cap Weather or NWS maps.

Posted by: Murre | June 23, 2008 5:15 PM | Report abuse

Isn't this Severe Thunderstorm Watch a taaaaaad late? Thundering in Lake Ridge, sky is awfully ominous

Posted by: weatherdudeVA (Lake Ridge) | June 23, 2008 5:17 PM | Report abuse

Rishi-- The first line is passing to the south, but the second line may not. Would give 50/50 odds of a rain delay--probably early rather than late

Posted by: Capital Weather Gang | June 23, 2008 5:18 PM | Report abuse

Murre -- At the moment, looks like all warnings are showing up as supposed to on NWS and on our map.

weatherdude -- yeah, I'd say they were a bit late with the Tstorm Watch

Posted by: Dan, Capital Weather Gang | June 23, 2008 5:24 PM | Report abuse

Dan, the Fred/Loud/Mont warning is **still** *not* showing up on the NWS map, or your map. It is still on the page I linked to, and Channel 4 has been showing it for at least 15 minutes.

So again, not all warnings are going through.

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
438 PM EDT MON JUN 23 2008

THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
NORTHWEST MONTGOMERY COUNTY IN CENTRAL MARYLAND...
SOUTH CENTRAL FREDERICK COUNTY IN NORTH CENTRAL MARYLAND...
NORTHEAST LOUDOUN COUNTY IN NORTHERN VIRGINIA...

* UNTIL 545 PM EDT

* AT 438 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM. THIS STORM WAS LOCATED NEAR LEESBURG...AND
MOVING NORTHEAST AT 18 MPH.

* LOCATIONS IMPACTED INCLUDE...
POOLESVILLE...
POOLESVILLE...
BOYDS...
BOYDS...
GERMANTOWN...
GAITHERSBURG...

HAIL TO THE SIZE OF PENNIES AND WIND GUSTS TO 60 MPH CAN BE EXPECTED
IN THE WARNED AREA. STAY INDOORS AND AWAY FROM WINDOWS UNTIL THE
STORM HAS PASSED.

LAT...LON 3942 7739 3913 7718 3908 7763 3915 7768
TIME...MOT...LOC 2038Z 246DEG 15KT 3911 7754

$$

ROGOWSKI

Posted by: Murre | June 23, 2008 5:32 PM | Report abuse

McleaNed, that is actually a man-made phenomenon. It was created by Ken.

Posted by: Dave | June 23, 2008 5:46 PM | Report abuse

In the words of Blind Melon, "I start to complain when (storms miss DC to the north, south, east, and west)"

Posted by: Dave | June 23, 2008 5:48 PM | Report abuse

Some storms forming right on top of DC now.

Posted by: Ian, Capital Weather Gang | June 23, 2008 5:52 PM | Report abuse

For the second straight evening, we seem to be in the severe weather strikezone. Round one came through with a torrential downpour, and rounds two and three are on their way. I wouldn't be surprised if we received another 1-2" of rain on top of yesterday's 1.5".

Posted by: David A. in Stafford | June 23, 2008 6:04 PM | Report abuse

Another day, another severe storm warning. This is getting monot, monoton, umm boring.

BTW, no wireless alert but it came through the desktop. Good thing I was home. Someday, I am not gonna get one of the wireless warnings, it will be really severe weather and I will be dead. A certaine wireless company will be happy then I suppose.

Posted by: ep | June 23, 2008 6:16 PM | Report abuse

Severe Thunderstorm Warnings on Channel 7 that are not on the NWS page or the Cap Weather page are for these counties: se Fairfax, se Prince William, Anne Arundel, and ne PG.

Posted by: Murre | June 23, 2008 6:42 PM | Report abuse

It looks like those warnings are now on the NWS page.
:-)

Posted by: Murre | June 23, 2008 6:54 PM | Report abuse

one of the most beautiful rainbows i've ever seen occurring now southwest of mclean, west of falls church; its a rainbow with double refraction, according to my friend with a physics major

Posted by: Peter L | June 23, 2008 7:12 PM | Report abuse

Double rainbow in upper NW very bright.

Posted by: Ian, Capital Weather Gang | June 23, 2008 7:20 PM | Report abuse

McleaNed

Though I cannot be totally sure, the cloud phenomena you saw most likely was a standing wave pattern induced by the relatively strong westerly flow at Jet level across the "mountainous" terrain to the west.

Not withstanding "Dave's facetious reply, Ken (whoever that is), nor any other flesh and blood being, had anything to with it.

Posted by: Steve Tracton, Capital Weather Gang | June 23, 2008 7:24 PM | Report abuse

Steve: We just had a magnificent double rainbow in Arlington. I have a pic if you're interested. E-mail me: kim.odonnel@washingtonpost.com

Posted by: Kim O'Donnel | June 23, 2008 7:33 PM | Report abuse

Okay...this was in the NWS discussion. Doesn't waiting for severe weather to occur defeat the purpose of a watch to begin with?

"WE SAT ON NOT ISSUING THE WATCH AS LONG AS POSSIBLE WITH MARGINAL STBLTY
...THEN WE STARTED TO RECEIVE PENNY HAIL REPORTS DOWN IN
PAGE/MADISON COUNTIES AND IN COORD WITH SPC PULLED THE TRIGGER.

18Z NAM HAS STRONG UVV SIGNATURE ACROSS REGION AT 8 PM TONIGHT.
ALTHO STABILITY IS MARGINAL...BELIEVE INCOMING DYNAMICS ARE SOLID
FOR ENUF SVR TSTMS TO WARRANT THE WATCH."

A thunderstorm popped up over PWC and it's raining at a good clip here in Lake Ridge. Few loud claps of thunder, too.

Sue Palka of Fox5 said that there are more storms in PA and WV that will cross the mountains and get here later on. What do you guys say?

Posted by: weatherdudeVA (Lake Ridge) | June 23, 2008 7:34 PM | Report abuse

Don't care much for the endless streak of storms, but am loving the double rainbow outside my window!

Posted by: alexandria | June 23, 2008 7:35 PM | Report abuse

Thanks for the heads-up, Steve--but I think I'm going to have to go with Dave on this one. :-) jk

Posted by: mcleaNed | June 23, 2008 7:45 PM | Report abuse

Sunshine, clouds, and no rainbows in Silver Spring.

Posted by: Murre | June 23, 2008 7:50 PM | Report abuse

We had the double-rainbow here in Bethesda, too. The most amazing rainbow I have ever seen. I took some photos if you're interested.... http://dartmouth05.livejournal.com/10347.html#cutid1

Posted by: Anonymous | June 23, 2008 7:53 PM | Report abuse

(feel free to share the photos, I merely ask for attribution to Jedidiah Sorokin-Altmann)

Posted by: Anonymous | June 23, 2008 7:57 PM | Report abuse

McleaNed

Sorry for taking seriously your query about the origin of the clouds. I'll know better next time

But, no harm done - unlike you, I suspect there are some out there who really did want to know where these clouds came from

Posted by: Steve Tracton, Capital Weather Gang | June 23, 2008 8:11 PM | Report abuse

Bethesda,
Those are great photos. You certainly had a very vibrant double rainbow.

Posted by: alexandria | June 23, 2008 8:44 PM | Report abuse

Wow, double rainbow sitings all over. Add this from Glen Burnie:

http://rocket9.net/Rainbow-Pano-800.jpg

Was certainly the brightest rainbow seen in a very long time, can't recall a double or even the last full rainbow in years.

Posted by: Bernie | June 23, 2008 8:46 PM | Report abuse

We had the spectacular double rainbow here in Riverdale Park, too! :-)

Posted by: Chickenlady | June 23, 2008 8:49 PM | Report abuse

Definitely about to get popped here in the LoCo bootheel...extremely cool wall cloud right over the Bull Run Mts...I expect a very nasty gust in the next 7-10 minutes...my wife saw the double rainbow on her way to Fairfax Hospital tonight near 495 and Gallows in Merrifield...mustve been pretty sweet...

Posted by: Dulles ARC | June 23, 2008 8:57 PM | Report abuse

NWS STORM PREDICTION CENTER NORMAN OK
0730 PM CDT MON JUN 23 2008

AREAS AFFECTED...DELMARVA

CONCERNING...SEVERE THUNDERSTORM WATCH 600...

VALID 240030Z - 240130Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 600
CONTINUES.

DEEPER CONVERGENCE APPEARS TO BE SHIFTING EAST ACROSS THE TIDEWATER
REGION...IN LINE WITH LEADING EDGE OF STRONGER CONVECTION. 00Z
SOUNDING FROM WAL CERTAINLY SUPPORTS ROBUST UPDRAFTS WITH STRONG
DEEP LAYER WLY SHEAR AND MODERATE POTENTIAL INSTABILITY. LARGE HAIL
AND DAMAGING WINDS REMAIN POSSIBLE WITH THESE STORMS AS THEY SPREAD
TOWARD THE COAST.

IN THE WAKE OF THE LEADING STORMS...BOUNDARY LAYER AIRMASS HAS SEEN
CONSIDERABLE CONVECTIVE OVERTURNING FROM CNTRL MD/VA INTO SCNTRL
PA..THOUGH POCKETS OF INSTABILITY REMAIN. THIS MAY LIMIT UPDRAFT
INTENSITY WITH INCOMING ACTIVITY DESPITE SEMI ORGANIZED NATURE.
HAIL OR PERHAPS SOME GUSTY WINDS WILL BE THE MAIN THREAT WITH THIS
SECONDARY CONVECTION.

Posted by: next line of storms | June 23, 2008 9:16 PM | Report abuse

Got a shot of the double rainbow over the Potomac from here in Old Town

http://farm4.static.flickr.com/3173/2606148162_292896079c_b.jpg

Posted by: alex | June 23, 2008 9:17 PM | Report abuse

Cool lightning off to my southeast associated with a building thunderstorm here in Sterling. Looks like I'm missing the worst of it, although there are some storms behind this one.

Dulles ARC: How's the storm?

About the rainbows, I seem to get double rainbows fairly often here... any explanation why?

Posted by: Anonymous | June 23, 2008 9:18 PM | Report abuse

Oops. I claim that comment.

Posted by: Model Monkey | June 23, 2008 9:20 PM | Report abuse

Alex! Love the picture!

Posted by: alexandria | June 23, 2008 9:22 PM | Report abuse

Wind is kicking up and I can see a lot of lightning in the distance. Can I open my windows after this round?

Posted by: Sara in Oakton | June 23, 2008 9:33 PM | Report abuse

I glance over at the radar screen to find--gasp! The biggest thunderstorm yet headed right for McLean. Expecting to hear thunder momentarily.

Steve: trust me--I was looking for the serious explanation, and I'm glad to have received it from you. Then again, you never know--Ken might just be proven right. :-)

Posted by: mcleaNed | June 23, 2008 9:36 PM | Report abuse

We had the beautiful double rainbow here in Merrifield too, and once again have barely been grazed by the storms. Nevertheless, I had some chocolate, and recommend it to all.

Posted by: ~sg | June 23, 2008 9:37 PM | Report abuse

Heavy, heavy rain rolled through Vienna at 9:45 but rolled out quickly. Didn't hear much thunder.

Posted by: Viennan | June 23, 2008 9:50 PM | Report abuse

Alex-- Amazing shot. Likewise, Bernie

Posted by: Jason, Capital Weather Gang | June 23, 2008 9:56 PM | Report abuse

Rainbows in Odenton, between 7:30 and 8:00 PM:

http://www.facebook.com/album.php?aid=41338&l=e9e5f&id=628151315

Posted by: WDC 21113 | June 23, 2008 10:12 PM | Report abuse

The cell that moved into Fairfax Co after 9 PM obviously weakened very quickly. Severe thunderstorm warnings were out and then were cancelled just a few minutes later.

Radar looks clear (finally) to the west. Hope this is finally the cold front.

Posted by: Mike | June 23, 2008 10:29 PM | Report abuse

All's quiet on the Cleveland Park front. But I can hear rain, and thunder in the background (or, possibly foreground?).

Seems to have passed though.

Posted by: CJ | June 23, 2008 10:38 PM | Report abuse

To Alex, Bernie, Dartmouth05 and WDC 21113: We would like to use some of your photos that you provided links to above in a blog post. Contact us by 10 a.m. Tuesday if this is a problem.

Posted by: Capital Weather Gang | June 24, 2008 1:13 AM | Report abuse

The comments to this entry are closed.

 
 
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