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


Kmlwx
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Velocity is NOTHING like it was earlier - but a few decent looking pixels SW of Leesburg. On mesoanalysis earlier I noted a little "tongue" of better MLLRs running through Central Maryland still. Plenty of CAPE - and not lead cells have ruined the airmass in MBY yet. Let's see how strong it can cycle back up to in the next 30 mins or so. It has likely already had it's peak. But not ruling out a wind core forming again. 

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Looks like that southward-moving outflow boundary generated by the earlier storms north o f I-70 has or is about to reach me here in the area between Gaithersburg/Montgomery Village and Laytonsville, per COD radar loop.  Wondering like others whether the approaching storm line from the west will have a chance to interact with it.

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The CIMMS shapefile seems slow to update today. Has routinely been a bit behind the storms. 

Thinking if that outflow from the MD storms gets to/past you, you might be ruled out for severe (but perhaps not for flooding). Matches well with the actual radar picture right now. It looks like it'll get to me before the actual storms. Thinking South of a line from Leesburg to Rockville to Hyattsville perhaps for best odds now. 

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@mappy area right?

Severe Weather Statement
National Weather Service Baltimore MD/Washington DC
511 PM EDT Tue Jul 12 2022

MDC015-025-122145-
/O.CON.KLWX.SV.W.0255.000000T0000Z-220712T2145Z/
Harford MD-Cecil MD-
511 PM EDT Tue Jul 12 2022

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR EASTERN HARFORD AND CECIL COUNTIES...

At 510 PM EDT, a severe thunderstorm was located over Riverside, or
near Aberdeen, moving east at 45 mph.

HAZARD...70 mph wind gusts and ping pong ball size hail.

SOURCE...Radar indicated.

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...
Elkton, Aberdeen, Havre De Grace, Aberdeen Proving Ground, Calvert,
Riverside, North East, Rising Sun, Perryman, Charlestown, Cecilton,
Warwick, Zion, Barksdale, Bohemias Mills, West Nottingham, Octoraro,
Brantwood, Fair Hill and Glen Westover.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

This is a DANGEROUS SITUATION. This storm has produced widespread
wind damage across Baltimore and Harford Counties. SEEK SHELTER NOW
inside a sturdy structure and stay away from windows.

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature`s leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 3938 7582 3936 7588 3938 7596 3937 7598
      3938 7605 3952 7600 3954 7606 3949 7611
      3947 7607 3945 7606 3944 7605 3937 7623
      3953 7624 3970 7627 3972 7579 3938 7577
TIME...MOT...LOC 2110Z 284DEG 41KT 3947 7627

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
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My weenieism is hoping the line can bully the outflow boundary back a bit. Not saying you can't get storms behind the outflow...just that the threat would be more heavy rain oriented versus severe t'storms. I think Potomac to Chevy Chase to College Park looks pretty good for storms. You can tell the outflow has made the northern part of the line really messy/weak looking. Line is fighting hard, though - the part right east of Dulles has a lot of lightning detected on it. 

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