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

[Kmlwx]

TDCA is seeing some 50-55mph winds with the Montgomery cell still. Wind threat does seem to be a touch lower than before. CIMMS probsevere numbers a bit lower again as well - but could rise again. 

[yoda]

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...

[gunny23]

Sitting in my car near Lowes island.  Car is blowing, it's pouring and car is being hit w hail

[yoda]

2 minutes ago, yoda said:

 

 

[batmanbrad]

That earlier squiggly outflow boundary that was heading north from the earlier storms either has or is about to intersect that Montgomery cell.

[87storms]

not much in the way of storms firing past this first round.  maybe the atmosphere got tired of raining.  i am intrigued by the cell moving through boonsboro though.  that would be a direct hit for mby.

[BlizzardNole]

11 minutes ago, batmanbrad said:

Looks on Radarscope as if that cell is making a bit of a right turn, away from Germantown/Gaithersburg and more towards Derwood/Rockville.

And I appreciate that!  I want no part of large hail

[87storms]

early congrats for the 270 split.

[gunny23]

And here comes the sun.  That was some intense rain and wind but only lasted a few minutes

[yoda]

 

 

 

[leesburg 04]

nothing here in Aldie but there is a cell that looks to be heading this way...

[LeesburgWx]

9 minutes ago, George BM said:

How strong were the winds with that storm IYBY?

Trying to nurse my weather station back but was 35 or so as of my last reading. It was a legit storm

[mappy]

24 minutes ago, Hank Scorpio said:

I was stuck in a meeting and couldn't get outside, but that Loudoun cell was looking pretty beastly from inside on approach. Thankful that the worst stayed just north of me

Great shot!!!

[Kmlwx]

Pea sized hail coming down in Colesville, MD! Torrential rain as well. Funny that the lead cell ended up delivering hail for me. The earlier dominant cell will go S of me it seems. 

[yoda]

Actually quite impressive that the the storm was able to produce hail to ping pong ball size in Loudoun County with ML Lapse Rates so poor... wonder if it just took advantage of the instability and boundary?

[midatlanticweather]

It was good in Purcellville at the start with some serious heavy rain too. Did not last too long but picked up 0.3 inches in about 10 minutes 

[Eskimo Joe]

I walk away for 20 min and come back to two legit baby supercells. Impressive hail reports!

 

[high risk]

3 minutes ago, yoda said:

Actually quite impressive that the the storm was able to produce hail to ping pong ball size in Loudoun County with ML Lapse Rates so poor... wonder if it just took advantage of the instability and boundary?

rotation can compensate for poor lapse rates

[Kmlwx]

2 minutes ago, yoda said:

Actually quite impressive that the the storm was able to produce hail to ping pong ball size in Loudoun County with ML Lapse Rates so poor... wonder if it just took advantage of the instability and boundary?

Juicy 90+ temps can work wonders if the right trigger goes through. We also had enough shear to get some updraft rotation like the earlier discussions. More organized version of the July-style pulse severe we get where a cell goes up but quickly collapses. 

[Eskimo Joe]

Looks like those Montgomery cells fed off that northward propagating boundary.

[Kmlwx]

Marble sized hail at peak in Colesville, MD. Huge runoff down the street and into the creeks near Springbrook HS now. Will be interesting to watch the stream gauge at Kemp Mill. 

[biodhokie]

Heavy rain, getting svr gusts sitting at the Westfield mall by democracy Blvd. No hail

[yoda]

Me: in Amazon Management Chime Room alerting the station to the severe weather

OPS manager:  Thanks Matthew, much appreciated. I didn't even realize it was supposed to storm today

 

 

[yoda]

 

[mattie g]

This untrained not spotter experienced heavy rain, no wind, and the occasional thunder.

Mid-Atlantic severe at its middling best!

[Kmlwx]

Decent CAPE and decent shear equaled this - even in the absence of good ML lapse rates. Also many of us got good sun today. It was a recipe for a good performance of severe weather. Number of LSRs is impressive. This will easily verify the watch and the overall risk area from SPC it looks like. Will be fun to see this show up in future years CIPS guidance. 

[WEATHER53]

Ominous skies east of Kensington .  University Blvd and Georgia Ave intersection flooded 

[yoda]

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

The National Weather Service in Sterling Virginia has issued a

* Severe Thunderstorm Warning for...
  The District of Columbia...
  Southeastern Montgomery County in central Maryland...
  Central Prince Georges County in central Maryland...
  Northern Arlington County in northern Virginia...
  Northeastern Fairfax County in northern Virginia...

* Until 500 PM EDT.

* At 418 PM EDT, a severe thunderstorm was located over Bethesda,
  moving east at 30 mph.

  HAZARD...60 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...
  Arlington, Bethesda, Bowie, College Park, Greenbelt, Langley Park,
  Forestville, Largo, Coral Hills, Bladensburg, Upper Marlboro,
  Mclean, University of Maryland, Fedex Field, Howard University,
  Gallaudet University, American Legion Bridge, Fort Totten, Rosslyn
  and RFK Stadium.

[Mrs.J]

Watching Flightradar24 a lot of big international planes being diverted from IAD. One to Philly and one to Norfolk. Many domestic flights in a continuous holding pattern. 

[09-10 analogy]

It’s booming pretty good in up nw. A LOT of angry lightning bugs with this one.