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

Kmlwx

By Kmlwx,
in Mid Atlantic

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poolz1
poolz1

Bro In law caught this beast of a bolt in Fenwick yesterday.  Too bad the neighbor's roof blocks part of the view but a pretty wild shot nonetheless.           

poolz1
poolz1

Lots of thunder, lightning and heavy rain.  No wind hardly at all.  Perfect rainbow storm with the sun breaking out as the clouds cleared to the west. Saw the rainbow and told my 12 yo daughter to tak

Hank Scorpio
Hank Scorpio

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

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yoda

yoda

Posted
Posted
15 minutes ago, Kmlwx said:

0z HRRR keeps activity forming overnight - appears non-severe of course, but some areas could still be in the game for some quick downpours even as late as 10z. 

Don't really see anything forming west of where the stuff us right now in DC and NE MD on radar attm

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Stormfly

Stormfly

Posted
Posted
1 hour ago, nw baltimore wx said:

Damn. Probably should be inside. Check out this feeler trying to get to us on the porch.

 

 

Great capture!

That would be a lens reflection.  You can make it that it mirrors the bolt and the predominately green wavelength depicted is indicative of remnants of the coating used.

I've seen these many times in videos and some even appear real as the sound in the video reveals a snapping noise.  However the snapping noise is from sideflashes occurring from nearby conductors that picked up enough potential from the nearby strike to arc over to conductive objects of lower potential.  Interestingly enough, energy from those sideflashes often find their way into sensitive electronic equipment often bypassing spike protection in the power supply usually due to alternate paths.

Bolts that long, that close are extremely sharp/loud similar to a centerfire rifle cartridge.  Running a Tesla coil at a "lowly" (in comparison) 50kW input with a secondary coil (magnifier), frequent D'Arsonval discharges were experienced that were about 15-20' long and were quite loud even with ear protection.

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Eskimo Joe

Eskimo Joe

Posted
Posted
12 minutes ago, Kmlwx said:

Backbuilding/new cells developing back towards Seneca in Montgomery Co. Will reinforce any small creek/urban flood threat . Even a minor hail marker showing on the TIAD scans. 

Per USGS Sensor, Sligo Creek @ Takoma Park about to hit minor flood stage.

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yoda

yoda

Posted
Posted

Apparently some don't learn 

Flash Flood Statement
National Weather Service Baltimore MD/Washington DC
1157 PM EDT Sat Jul 2 2022

MDC031-030600-
/O.CON.KLWX.FF.W.0023.000000T0000Z-220703T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Montgomery MD-
1157 PM EDT Sat Jul 2 2022

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 2 AM EDT SUNDAY FOR
CENTRAL MONTGOMERY COUNTY...

At 1157 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 4 and 6 inches of rain
have fallen. The expected rainfall rate is 1 to 2 inches in 1 hour.
Additional rainfall amounts of 0.5 to 1.5 inches are possible in the
warned area. Flash flooding is already occurring.

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

SOURCE...Radar and law enforcement. Norbeck Road was closed due
         to flooding at Rock Creek in Rockville. Several water
         rescues were ongoing in Rockville and Aspen Hill as of
         just before midnight.

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

Some locations that will experience flash flooding include...
Rockville...                       Gaithersburg...
Aspen Hill...                      Potomac...
North Bethesda...                  North Potomac...
Redland...                         Rossmoor...
Wheaton-Glenmont...                Wheaton...
Darnestown...                      Derwood...
Washington Grove...

This includes the following Flood Prone Roads:
Viers Mill Road at Rock Creek...


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&
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yoda

yoda

Posted
Posted

Haven't seen a warning written like this before 

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Baltimore MD/Washington DC
117 AM EDT Sun Jul 3 2022

The National Weather Service in Sterling Virginia has issued a

* Severe Thunderstorm Warning for...
  Central Anne Arundel County in central Maryland...
  Northern Prince Georges County in central Maryland...

* Until 200 AM EDT.

* At 116 AM EDT, a cluster of heavy thunderstorms capable of
  producing localized wet microbursts were located along a line
  extending from Naval Academy to Fort Totten, moving east at 10 mph.

  HAZARD...Localized wind gusts up to 60 mph.

  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...
  Bowie, Annapolis, College Park, Crofton, Greenbelt, Langley Park,
  Largo, Bladensburg, Mayo, Naval Academy, Severn River, South River,
  University of Maryland, Fedex Field, Odenton, Arnold, Landover,
  Hyattsville, Takoma Park and Parole.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Kmlwx

Posted
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Posted

Major outage in Eastern MoCo and western PGCO. Been out since around 2am. Generator picked a great night to fail.... 

Must be a big transmission line or substation. Usually those get isolated quick... No such luck this time. Seems over 20K are impacted. 

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George BM

George BM

Posted
Posted
7 hours ago, yoda said:

00z NAM going with some outlandish soundings late Tuesday evening

ETA: looks like nw flow stuff... cause KPIT at 18z has a nasty sounding

SPC has us in the SLGT for Day 3 (Tuesday). Timing looks better for any potential NW flow cluster than what we usually experience with these regimes. We'll see how it shapes out and how far NE into the region the good CAPE gets.

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