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2022 Mid-Atlantic Severe Wx Thread (General Discussion Etc)


Kmlwx
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The Loudoun cell is preparing to cross over into Montgomery. That cell seems to have some legs so far. That may be the one to watch for the closer in northern DC burbs and even DC proper. It's heading ESE and continues to look impressive both on KLWX and TIAD. Question is the impact of the lead cells near Gaithersburg and the beltway. Those could leave behind a bit of a stabilized airmass for the larger, more intense cell. 

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1 minute ago, Kmlwx said:

The Loudoun cell is preparing to cross over into Montgomery. That cell seems to have some legs so far. That may be the one to watch for the closer in northern DC burbs and even DC proper. It's heading ESE and continues to look impressive both on KLWX and TIAD. Question is the impact of the lead cells near Gaithersburg and the beltway. Those could leave behind a bit of a stabilized airmass for the larger, more intense cell. 

the lightning showing up from that cell near leesburg is crazy.  would make for an interesting bike ride on the c and o.

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Trained spotters report quarter size hail near Leesburg

Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
348 PM EDT Thu Jun 2 2022

MDC031-VAC107-022015-
/O.CON.KLWX.SV.W.0089.000000T0000Z-220602T2015Z/
Montgomery MD-Loudoun VA-
348 PM EDT Thu Jun 2 2022

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR WEST CENTRAL MONTGOMERY AND EAST CENTRAL LOUDOUN COUNTIES...

At 348 PM EDT, a severe thunderstorm was located over Lansdowne,
moving east at 30 mph.

HAZARD...70 mph wind gusts and half dollar size hail.

SOURCE...Trained weather spotters. Quarter size hail has been
         reported near Leesburg.

IMPACT...Damaging winds will cause some trees and large branches to
         fall. This could injure those outdoors, as well as damage
         homes and vehicles. Roadways may become blocked by downed
         trees. Localized power outages are possible. Unsecured
         light objects may become projectiles.

Locations impacted include...
Leesburg, Lansdowne, Lowes Island, Poolesville, Ashburn, Countryside,
Belmont, Barnesville, Beallsville and Dawsonville.
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ProbSevere numbers are coming down a bit now with the MoCo/Loudoun cell. Let's see if it collapses or pulses back up at some point. It may be encountering some stabilized airmass as it's now entering the area where the front running cells were. 

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@Kmlwx

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Baltimore MD/Washington DC
352 PM EDT Thu Jun 2 2022

The National Weather Service in Sterling Virginia has issued a

* Severe Thunderstorm Warning for...
  Central Montgomery County in central Maryland...
  Eastern Loudoun County in northern Virginia...
  Northeastern Fairfax County in northern Virginia...

* Until 430 PM EDT.

* At 352 PM EDT, a severe thunderstorm was located over Countryside,
  or near Poolesville, moving east at 30 mph.

  HAZARD...60 mph wind gusts and half dollar size hail.

  SOURCE...Trained weather spotters have reported quarter size and
           larger hail near Leesburg.

  IMPACT...Damaging winds will cause some trees and large branches
           to fall. This could injure those outdoors, as well as
           damage homes and vehicles. Roadways may become blocked by
           downed trees. Localized power outages are possible.
           Unsecured light objects may become projectiles.

* Locations impacted include...
  Germantown, Rockville, Bethesda, Gaithersburg, Olney, Lowes Island,
  Aspen Hill, Potomac, North Bethesda, Montgomery Village, North
  Potomac, Redland, Great Falls, Colesville, Kemp Mill, Countryside,
  Chevy Chase, North Kensington, South Kensington and Forest Glen.
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FFW for Alexandria/Fairfax

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Baltimore MD/Washington DC
355 PM EDT Thu Jun 2 2022

The National Weather Service in Sterling Virginia has issued a

* Flash Flood Warning for...
  Southeastern Fairfax County in northern Virginia...
  The West Central City of Alexandria in northern Virginia...

* Until 700 PM EDT.

* At 355 PM EDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Between 0.5 and 1 inch of rain
  has fallen. The expected rainfall rate is 1.5 to 2.5 inches in 1
  hour. Additional rainfall amounts of 0.5 to 1 inch are possible in
  the warned area. Flash flooding is ongoing or expected to begin
  shortly.

  HAZARD...Life threatening flash flooding. Thunderstorms
           producing flash flooding.

  SOURCE...Radar.

  IMPACT...Life threatening flash flooding of creeks and streams,
           urban areas, highways, streets and underpasses.

* Some locations that will experience flash flooding include...
  Alexandria...                      Annandale...
  Springfield...                     Groveton...
  Fort Belvoir...                    Burke...
  Lincolnia...                       Lorton...
  Franconia...                       Newington...
  I395 and I495 Interchange...       West Springfield...
  Mount Vernon...                    Fairfax Station...
  North Springfield...               Hayfield...
  Ravensworth...
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