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August Discobs 2019


George BM
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1 minute ago, mappy said:

not showing up

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ACUS11 KWNS 071702
SWOMCD
SPC MCD 071702 
MAZ000-NHZ000-RIZ000-CTZ000-NYZ000-VTZ000-NJZ000-PAZ000-MDZ000-DEZ000-VAZ000-DCZ000-WVZ000-071830-

MESOSCALE DISCUSSION 1664

NWS STORM PREDICTION CENTER NORMAN OK
1222 PM CDT WED AUG 07 2019

AREAS AFFECTED...THE MID-ATLANTIC INTO PORTIONS OF THE NORTHEAST

CONCERNING...SEVERE POTENTIAL...WATCH LIKELY 

VALID 071702Z - 071830Z

PROBABILITY OF WATCH ISSUANCE...95 PERCENT

SUMMARY...STRONG TO SEVERE STORMS ARE EXPECTED THIS AFTERNOON AND
EVENING WITH A THREAT FOR LARGE HAIL AND DAMAGING WINDS. A WATCH IS
LIKELY.

DISCUSSION...NUMEROUS STORMS HAVE STARTED TO DEVELOP FROM THE
MID-ATLANTIC INTO PORTIONS OF THE NORTHEAST IN AN ENVIRONMENT WITH
TEMPERATURES IN THE 80S AND DEWPOINTS FROM THE UPPER 60S TO MID 70S.
EFFECTIVE SHEAR AROUND 30 KNOTS WILL SUPPORT MULTICELL CLUSTERS AND
LINES CAPABLE OF BOTH LARGE HAIL AND DAMAGING WINDS. MID-LEVEL LAPSE
RATES AROUND 6.5 TO 7 C/KM WILL SUPPORT A GREATER THREAT FOR LARGE
HAIL IN THIS REGION THAN FARTHER SOUTH ACROSS VIRGINIA AND NORTH
CAROLINA. THE GREATEST THREAT FOR BOTH LARGE HAIL AND DAMAGING WINDS
WILL BE FROM CENTRAL MARYLAND NORTHEAST INTO FAR SOUTHEAST NEW YORK
WHERE STORM COVERAGE, INSTABILITY, AND SHEAR WILL BE MAXIMIZED AHEAD
OF AN MCV CURRENTLY OUT OF FAR EASTERN WEST VIRGINIA. A WATCH WILL
BE ISSUED SOON.



..BENTLEY/GOSS.. 08/07/2019

 

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SVR for Frederick, MD

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he National Weather Service in Sterling Virginia has issued a

* Severe Thunderstorm Warning for...
  Southeastern Frederick County in north central Maryland...

* Until 200 PM EDT.

* At 111 PM EDT, a severe thunderstorm was located near Ballenger
  Creek, or 7 miles south of Harry Grove Stadium, moving northeast at
  20 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...
  Frederick, Harry Grove Stadium, Ballenger Creek, Walkersville, New
  Market, Discovery-Spring Garden, Linganore-Bartonsville, Adamstown,
  Woodsboro, Buckeystown, Libertytown, Monrovia, Ijamsville, Mount
  Pleasant, Doubs, Park Mills and Tuscarora.

 

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BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Baltimore MD/Washington DC
135 PM EDT Wed Aug 7 2019

The National Weather Service in Sterling Virginia has issued a

* Severe Thunderstorm Warning for...
  West central Loudoun County in northern Virginia...
  Southeastern Clarke County in northwestern Virginia...
  Northeastern Warren County in northwestern Virginia...
  Northwestern Fauquier County in northern Virginia...

* Until 215 PM EDT.

* At 135 PM EDT, a severe thunderstorm was located over Linden, or
  near Front Royal, moving northeast at 20 mph.

  HAZARD...60 mph wind gusts and half dollar 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...
  Front Royal, Linden, Delaplane, Chester Gap, Saint Louis, Blue
  Mountain, Howellsville, Upperville, Markha
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7 minutes ago, yoda said:

@BlizzardNole should be getting some rain right now if he is just north of Germantown in MD

Hey Yoda, yeah looks like a cell went through to give my parched yard a drink.  I'm in DC and hoping for a big one to hit here this afternoon (just not at 5 PM LOL).

Looks like some training setting up in Southern FredCo.

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2 minutes ago, batmanbrad said:

STW just issued for central MoCo for the storm near Lowes Island/Great Falls area, moving NE at 25mph

Notice how the outflow from the initial storm in Frederick County has moved east and is energizing the activity in Fairfax and Montgomery.  Decent wind signature just NE of Sugarland Run in Fairfax.

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