Eskimo Joe Posted September 8, 2023 Share Posted September 8, 2023 Seems to be a weak surface convergence area in the NW suburbs of DC/Baltimore. Surface observations show NW/SE surface wind convergence along a line from Culpepper to IAD to Westminster to Bel Air. Wonder if we see something ride up along that today? Link to comment Share on other sites More sharing options...
Kmlwx Posted September 8, 2023 Author Share Posted September 8, 2023 The storm just E of Luray has motion of 227/11kts based on the warning. Slow mover. Almost has a little mini supercell appearance to it on base reflectivity. ETA: Actually looking at velocity maybe that cell (and the one back NE of Waynesboro do have some weak/mid level rotation? Link to comment Share on other sites More sharing options...
WxUSAF Posted September 8, 2023 Share Posted September 8, 2023 18z 3k NAM much more robust for the metro areas than 12z 2 Link to comment Share on other sites More sharing options...
Eskimo Joe Posted September 8, 2023 Share Posted September 8, 2023 7 minutes ago, WxUSAF said: 18z 3k NAM much more robust for the metro areas than 12z Just saw, very nice. Link to comment Share on other sites More sharing options...
Kmlwx Posted September 8, 2023 Author Share Posted September 8, 2023 Stuff firing locally now. Lightning strike showing up in extreme southern tip of Loudoun County. Link to comment Share on other sites More sharing options...
midatlanticweather Posted September 8, 2023 Share Posted September 8, 2023 8 minutes ago, Kmlwx said: Stuff firing locally now. Lightning strike showing up in extreme southern tip of Loudoun County. That little thundershower was so small it made it look like lightning out of the blue! I do see what looks like rotation on that storm in Front Royal. Interesting. Link to comment Share on other sites More sharing options...
Eskimo Joe Posted September 8, 2023 Share Posted September 8, 2023 Fauquier cell just got warned...decent hail core on it. Link to comment Share on other sites More sharing options...
aldie 22 Posted September 8, 2023 Share Posted September 8, 2023 The cell west of IAD appears to be moving west which matches my Cloud movement comment Link to comment Share on other sites More sharing options...
aldie 22 Posted September 8, 2023 Share Posted September 8, 2023 Wind picking up and temperature drop is quite noticeable...sitting on the front porch of course Link to comment Share on other sites More sharing options...
aldie 22 Posted September 8, 2023 Share Posted September 8, 2023 Pouring Link to comment Share on other sites More sharing options...
Eskimo Joe Posted September 8, 2023 Share Posted September 8, 2023 7 minutes ago, aldie 22 said: Pouring Where are you located at? Link to comment Share on other sites More sharing options...
aldie 22 Posted September 8, 2023 Share Posted September 8, 2023 Hailing like a mofo Link to comment Share on other sites More sharing options...
Eskimo Joe Posted September 8, 2023 Share Posted September 8, 2023 Several boundaries about to meet up (bay breeze, outflow from NOVA storms, first boundary along NW suburbs) over Montgomery or Howard county. Will be interesting to see if this kicks anything off. Link to comment Share on other sites More sharing options...
aldie 22 Posted September 8, 2023 Share Posted September 8, 2023 6 minutes ago, Eskimo Joe said: Where are you located at? Aldie almost where 15 and 50 intersect Link to comment Share on other sites More sharing options...
Eskimo Joe Posted September 8, 2023 Share Posted September 8, 2023 Looks like IAD / LWX WFO office getting slammed. 4 Link to comment Share on other sites More sharing options...
WxUSAF Posted September 8, 2023 Share Posted September 8, 2023 1 minute ago, Eskimo Joe said: Looks like IAD / LWX WFO office getting slammed. Whoa https://twitter.com/nws_baltwash/status/1700269052776919431?s=46&t=JYOHM881b6groqc0-RqtxA 3 Link to comment Share on other sites More sharing options...
aldie 22 Posted September 8, 2023 Share Posted September 8, 2023 Still pouring flood warnings up now Link to comment Share on other sites More sharing options...
yoda Posted September 8, 2023 Share Posted September 8, 2023 Severe Weather Statement National Weather Service Baltimore MD/Washington DC 609 PM EDT Fri Sep 8 2023 VAC059-107-153-082245- /O.CON.KLWX.SV.W.0333.000000T0000Z-230908T2245Z/ Loudoun VA-Fairfax VA-Prince William VA- 609 PM EDT Fri Sep 8 2023 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EDT FOR SOUTHEASTERN LOUDOUN...NORTHWESTERN FAIRFAX AND NORTHWESTERN PRINCE WILLIAM COUNTIES... At 608 PM EDT, a severe thunderstorm was located over Brambleton, moving northeast at 10 mph. HAZARD...Golf ball size hail and 60 mph wind gusts. SOURCE...Trained weather spotters. Numerous reports of wind driven hail have been reported across southern and eastern Loudoun County, mainly up to half dollar size hail. Hail up to golf ball size is possible. IMPACT...Expect wind damage to trees and power lines. Hail is large enough to dent and damage vehicles. Some hail damage to roofs, siding, and windows is possible. Locations impacted include... South Riding, Herndon, Broadlands, Lansdowne, Lowes Island, Brambleton, Dulles International Airport, Ashburn, Sterling, Chantilly, Countryside, Arcola, Belmont, and Sterling Park. PRECAUTIONARY/PREPAREDNESS ACTIONS... This storm is producing large hail. SEEK SHELTER NOW inside a sturdy structure and stay away from windows. To report severe weather contact your nearest law enforcement agency. They will send your report to the National Weather Service office in Sterling Virginia. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 3905 7736 3899 7738 3892 7742 3887 7750 3887 7757 3888 7767 3890 7767 3894 7765 3903 7761 3908 7752 3906 7742 TIME...MOT...LOC 2208Z 205DEG 7KT 3898 7750 THUNDERSTORM DAMAGE THREAT...CONSIDERABLE HAIL THREAT...OBSERVED MAX HAIL SIZE...1.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH Link to comment Share on other sites More sharing options...
Eskimo Joe Posted September 8, 2023 Share Posted September 8, 2023 Quite impressive: Quote Loudoun VA-Fairfax VA-Prince William VA- 609 PM EDT Fri Sep 8 2023 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EDT FOR SOUTHEASTERN LOUDOUN...NORTHWESTERN FAIRFAX AND NORTHWESTERN PRINCE WILLIAM COUNTIES... At 608 PM EDT, a severe thunderstorm was located over Brambleton, moving northeast at 10 mph. HAZARD...Golf ball size hail and 60 mph wind gusts. SOURCE...Trained weather spotters. Numerous reports of wind driven hail have been reported across southern and eastern Loudoun County, mainly up to half dollar size hail. Hail up to golf ball size is possible. IMPACT...Expect wind damage to trees and power lines. Hail is large enough to dent and damage vehicles. Some hail damage to roofs, siding, and windows is possible. Locations impacted include... South Riding, Herndon, Broadlands, Lansdowne, Lowes Island, Brambleton, Dulles International Airport, Ashburn, Sterling, Chantilly, Countryside, Arcola, Belmont, and Sterling Park. Link to comment Share on other sites More sharing options...
Kmlwx Posted September 8, 2023 Author Share Posted September 8, 2023 ProbSevere numbers are starting to come down a bit now on the LWX cell(s). May cycle back up - or pop new activity. Will be interesting to see how the next hour or so plays out - slow movers! Link to comment Share on other sites More sharing options...
yoda Posted September 8, 2023 Share Posted September 8, 2023 Make that outflow boundary do something lol Link to comment Share on other sites More sharing options...
WxUSAF Posted September 8, 2023 Share Posted September 8, 2023 Move east damn it 1 Link to comment Share on other sites More sharing options...
Eskimo Joe Posted September 8, 2023 Share Posted September 8, 2023 M70mph wind gust Brambleton, VA 1 Link to comment Share on other sites More sharing options...
Eskimo Joe Posted September 8, 2023 Share Posted September 8, 2023 That one cell in Loudoun County verified the entire watch box on its own. Link to comment Share on other sites More sharing options...
Kmlwx Posted September 8, 2023 Author Share Posted September 8, 2023 That may be one of the most perfectly round outflow boundaries I've seen recently. Near perfect arc heading ESE. 2 Link to comment Share on other sites More sharing options...
yoda Posted September 8, 2023 Share Posted September 8, 2023 Wow, 15 minutes of hail up to half dollar size at the LWX FO that covered the ground Preliminary Local Storm Report National Weather Service Baltimore MD/Washington DC 622 PM EDT Fri Sep 08 2023 ..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 0600 PM Hail 3 NW Dulles Internation 38.98N 77.49W 09/08/2023 M1.25 inch Loudoun VA NWS Office Hail of up to half dollar size was observed for about 15 minutes from 6:00 to 6:15 PM at the NWS Office in Sterling. Hail covered the ground. && Event Number LWX2302457 Link to comment Share on other sites More sharing options...
Kmlwx Posted September 8, 2023 Author Share Posted September 8, 2023 Also looks like the boundaries if they collide will occur in eastern Montgomery and DC. Link to comment Share on other sites More sharing options...
yoda Posted September 8, 2023 Share Posted September 8, 2023 7 minutes ago, Eskimo Joe said: M70mph wind gust Brambleton, VA Preliminary Local Storm Report...Corrected National Weather Service Baltimore MD/Washington DC 624 PM EDT Fri Sep 08 2023 ..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 0615 PM Tstm Wnd Gst 1 N Arcola 38.97N 77.53W 09/08/2023 M71 mph Loudoun VA Mesonet Wind gusts of up to 62 knots (71 MPH) were measured by a Tempest station (23370) between Arcola and Brambleton. && Corrected event...remarks Event Number LWX2302455 Link to comment Share on other sites More sharing options...
Eskimo Joe Posted September 8, 2023 Share Posted September 8, 2023 4 minutes ago, yoda said: Wow, 15 minutes of hail up to half dollar size at the LWX FO that covered the ground Preliminary Local Storm Report National Weather Service Baltimore MD/Washington DC 622 PM EDT Fri Sep 08 2023 ..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 0600 PM Hail 3 NW Dulles Internation 38.98N 77.49W 09/08/2023 M1.25 inch Loudoun VA NWS Office Hail of up to half dollar size was observed for about 15 minutes from 6:00 to 6:15 PM at the NWS Office in Sterling. Hail covered the ground. && Event Number LWX2302457 Outright HP supercell. 1 Link to comment Share on other sites More sharing options...
yoda Posted September 8, 2023 Share Posted September 8, 2023 Woah BULLETIN - EAS ACTIVATION REQUESTED Severe Thunderstorm Warning National Weather Service Baltimore MD/Washington DC 639 PM EDT Fri Sep 8 2023 The National Weather Service in Sterling Virginia has issued a * Severe Thunderstorm Warning for... Southeastern Loudoun County in northern Virginia... Northwestern Fairfax County in northern Virginia... Northwestern Prince William County in northern Virginia... * Until 715 PM EDT. * At 637 PM EDT, a severe thunderstorm was located over Dulles International Airport, moving northeast at 10 mph. HAZARD...Two inch hail and 60 mph wind gusts. SOURCE...Trained weather spotters. Numerous reports of significant wind driven hail, of at least ping pong ball size, is ongoing with storms across eastern Loudoun and Northeast Prince William Counties. Hail up to two inches is possible. IMPACT...Expect wind damage to trees and power lines. Hail is large enough to dent and damage vehicles. Some hail damage to roofs, siding, and windows is possible. * Locations impacted include... South Riding, Herndon, Broadlands, Lansdowne, Lowes Island, Brambleton, Dulles International Airport, Ashburn, Sterling, Chantilly, Great Falls, Countryside, Haymarket, Arcola, Gainesville, Belmont, Catharpin, Woolsey, and Sterling Park. PRECAUTIONARY/PREPAREDNESS ACTIONS... This storm is producing large hail. SEEK SHELTER NOW inside a sturdy structure and stay away from windows! To report severe weather, contact your nearest law enforcement agency. They will send your report to the National Weather Service office in Sterling Virginia. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 3907 7742 3906 7734 3905 7730 3879 7758 3881 7769 3888 7769 3899 7759 3908 7746 TIME...MOT...LOC 2237Z 226DEG 7KT 3897 7749 THUNDERSTORM DAMAGE THREAT...CONSIDERABLE HAIL THREAT...OBSERVED MAX HAIL SIZE...2.00 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH Link to comment Share on other sites More sharing options...
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