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


Kmlwx
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3 minutes ago, NorthArlington101 said:


Radar really had me thinking this would be a memorable summer storm. Feel like I got the rug pulled out under me

Agreed. I was pretty pumped, but I noticed that there wasn’t much thunder as the line approached. That dampened my enthusiasm a little.

I’ll take the rain though…and it’s looking like we might stay in it for a bit as that train develops to the west.

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21 minutes ago, vastateofmind said:

Some middling lightning/thunder, steady rain for about 10-15 min now, none of which I feel deserves a ST warning....but the most impressive thing was the boiling pot of mammatus clouds just prior to the "main" weather kicking in on this line...

PXL_20220712_215617710_3a.thumb.jpg.048921a4848ec3acef75e297e968ca0f.jpg

Nice!  Was a pretty good storm. I saw some weak rotation in that soup of fun clouds as it passed here. Horizontal in nature but was rolling. 
 

Needed this last night when we did a B meet at the pool in your hood 

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For those east of DC metro

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

MDC003-009-017-033-037-122300-
/O.CON.KLWX.SV.W.0260.000000T0000Z-220712T2300Z/
Anne Arundel MD-St. Marys MD-Calvert MD-Prince Georges MD-Charles MD-
633 PM EDT Tue Jul 12 2022

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR SOUTHEASTERN ANNE ARUNDEL...NORTHERN ST. MARYS...NORTHWESTERN
CALVERT...SOUTHEASTERN PRINCE GEORGES AND NORTHEASTERN CHARLES
COUNTIES...

At 632 PM EDT, severe thunderstorms were located along a line
extending from Londontowne to near Waldorf, moving east at 45 mph.

HAZARD...70 mph wind gusts and quarter 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...
Waldorf, Bowie, Clinton, Mayo, Shady Side, Chesapeake Beach, Deale,
Prince Frederick, Upper Marlboro, South River, Breezy Point, Rhode
River, Parole, Kettering, Rosaryville, Marlton, Dunkirk, Saint
Charles, Londontowne and Accokeek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

This is an EXTREMELY DANGEROUS SITUATION. These storms are producing
widespread wind damage across Anne Arundel and Calvert counties in
Maryland. SEEK SHELTER NOW inside a sturdy structure and stay away
from windows.

Continuous cloud to ground lightning is occurring with these storms.
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.
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https://www.wpc.ncep.noaa.gov/metwatch/metwatch_mpd_multi.php?md=488&yr=2022

Mesoscale Precipitation Discussion 0488
NWS Weather Prediction Center College Park MD
642 PM EDT Tue Jul 12 2022

Areas affected...Northern Virginia...Southern Central
Maryland...District of Columbia...

Concerning...Heavy rainfall...Flash flooding possible

Valid 122245Z - 130245Z

SUMMARY...Very intense short-term rain rates aligning for
favorable training/repeating resulting in possible localized flash
flooding through late evening.

DISCUSSION...Severe weather scenrio continues to unfold across the
Mid-Atlantic with very strong thunderstorms and high wind gusts. 
This is also resulting in intense moisture convergence with these
cells within a very moist and unstable environment.  The mass
loading into the cells have resulted in numerous reports of 1"/30
minutes with each individual cell.   In the short-term, the
overall speed has limited flooding concerns in all but the most
prone areas, ie urban settings.

However, larger scale synoptic setup has favored the cell moving
across DC toward Annapolis MD in a very favorable placement to the
right entrance region of the jet, but the speed max is exiting
toward the northeast.   Upstream across WV a secondary subtle
speed max is starting to round the base of the upper trof.  This
has reduced the forward speed of the cold front crossing the
central Applachians resulting in a weak kink or wave around W MD. 
As such, the outflow boundary from the initial storm as oriented
favorably west to east for increased west-southwesterly flow ahead
of the approaching speed max/synopic ascent.  As a result oblique
but sufficient isentropic ascent for additional similar but
slightly less intense thunderstorms have formed generally parallel
to the mean flow suggesting increased training potential across
Northern VA into southern central MD.  Given potential of
backbuilding/training as supported by recent runs of the HRRR, an
axis 2-4" totals are possible likely from Rockingham, VA toward
Prince William and across into Charles county this evening.  This
crosses a few areas of lowered FFG due to recent heavy rainfall
increasing the potential for flash flooding to occur.   

Gallina

ATTN...WFO...AKQ...LWX...

ATTN...RFC...MARFC...NWC...
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12 minutes ago, H2O said:

Nice!  Was a pretty good storm. I saw some weak rotation in that soup of fun clouds as it passed here. Horizontal in nature but was rolling. 

Needed this last night when we did a B meet at the pool in your hood 

I know, right? That stuff was really rotating when it first started to move in...mesmerizing.

And nice indeed on the 'hood meet! My wife and I were wondering if last night was the HF/VH B meet. Pretty sure you probably know our awesome next-door neighbors (the Garcias) who live here in HF, but are still members at VH. They are SUCH a cool fam...  :) 

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Middletown, DE and Cheasapeake City City was hit very hard.  Numerous trees down, Pine trees and Oaks especially. Local flooding, I estimated winds from the damage to have been near 70 mph,  maybe more.  I missed the storm , as I was driving back from Chestertown, MD.  Very impressive swath of damage for sure.   

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6 minutes ago, vastateofmind said:

I know, right? That stuff was really rotating when it first started to move in...mesmerizing.

And nice indeed on the 'hood meet! My wife and I were wondering if last night was the HF/VH B meet. Pretty sure you probably know our awesome next-door neighbors (the Garcias) who live here in HF, but are still members at VH. They are SUCH a cool fam...  :) 

I do know them!  Sorry to have poached them from y'alls hood.  

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