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2017 Severe Thread


mappy

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12 minutes ago, supernovasky said:

Very windy even with clear skies here. When a good convective burst comes through, it'll translate more of those winds to the surface. I'm looking forward to this.

 

You can now thank me instead of hate me for moving from Louisiana.

I was about to say bring us your hurricanes but then I remembered what N Gulf hurricanes looked like and I decided you can keep them.

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BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Baltimore MD/Washington DC
1156 AM EST WED MAR 1 2017

The National Weather Service in Sterling Virginia has issued a

* Severe Thunderstorm Warning for...
  Central Nelson County in central Virginia...
  Shenandoah County in northwestern Virginia...
  The City of Staunton in western Virginia...
  Rockingham County in western Virginia...
  Western Warren County in northwestern Virginia...
  Page County in northwestern Virginia...
  Northwestern Albemarle County in central Virginia...
  West central Greene County in central Virginia...
  Augusta County in western Virginia...
  The City of Waynesboro in western Virginia...
  The City of Harrisonburg in western Virginia...
  Southeastern Highland County in western Virginia...
  Southeastern Grant County in eastern West Virginia...
  Southeastern Pendleton County in eastern West Virginia...
  Hardy County in eastern West Virginia...

* Until 1245 PM EST

* At 1156 AM EST, severe thunderstorms were located along a line
  extending from near Rough Run to near Yost, moving east at 50 mph.

  HAZARD...60 mph wind gusts.

  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...
  Harrisonburg, Staunton, Waynesboro, Front Royal, Strasburg,
  Woodstock, Moorefield, Stuarts Draft, Bridgewater, Crozet, Luray,
  Broadway, Grottoes, Timberville, Shenandoah, Massanutten, Crimora,
  Mount Jackson, Stanley and Sherando.
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BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Baltimore MD/Washington DC
1212 PM EST WED MAR 1 2017

The National Weather Service in Sterling Virginia has issued a

* Severe Thunderstorm Warning for...
  Northwestern Washington County in north central Maryland...
  Allegany County in western Maryland...
  Northeastern Shenandoah County in northwestern Virginia...
  Frederick County in northwestern Virginia...
  Northwestern Warren County in northwestern Virginia...
  Northwestern Clarke County in northwestern Virginia...
  The City of Winchester in northwestern Virginia...
  Western Jefferson County in the Panhandle of West Virginia...
  Morgan County in the Panhandle of West Virginia...
  Northeastern Hardy County in eastern West Virginia...
  Berkeley County in the Panhandle of West Virginia...
  Hampshire County in eastern West Virginia...

* Until 1245 PM EST

* At 1212 PM EST, severe thunderstorms were located along a line
  extending from 8 miles northeast of Lake Gordon to 7 miles west of
  Wardensville, moving east at 50 mph.

  HAZARD...60 mph wind gusts.

  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...
  Winchester, Cumberland, Martinsburg, Strasburg, Romney, Hancock,
  Paw Paw, Millwood Pike, Inwood, Stephens City, Berkeley Springs,
  Wardensville, Star Tannery, Ridgeley, Potomac Park, Middletown,
  Wiley Ford, Springfield, Great Cacapon and Clear Spring.
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    The SPC mesoanalysis numbers look meh, but that's because the cape hasn't come up fast enough.    If you look at the supercell composite and choose the option that makes a forecast in time, the values become quite healthy in DC/Baltimore metro right ahead of the line.      The low-level shear is quite strong.    If storms were initiating from scratch, I think we'd have supercells for sure.    But the existing linear structure makes that tougher, although I would absolutely not rule out the line developing a few supercell structures as it arrives.

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BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Baltimore MD/Washington DC
1226 PM EST WED MAR 1 2017

The National Weather Service in Sterling Virginia has issued a

* Severe Thunderstorm Warning for...
  Southwestern Loudoun County in northern Virginia...
  East central Shenandoah County in northwestern Virginia...
  South central Frederick County in northwestern Virginia...
  Northern Orange County in central Virginia...
  Fauquier County in northern Virginia...
  Rappahannock County in northwestern Virginia...
  Culpeper County in northern Virginia...
  Northwestern Prince William County in northern Virginia...
  Madison County in northwestern Virginia...
  Southeastern Rockingham County in western Virginia...
  Warren County in northwestern Virginia...
  Southern Clarke County in northwestern Virginia...
  Page County in northwestern Virginia...
  Northern Albemarle County in central Virginia...
  Greene County in central Virginia...

* Until 115 PM EST

* At 1226 PM EST, severe thunderstorms were located along a line
  extending from near Strasburg to 8 miles southeast of Massanutten,
  moving east at 55 mph.

  HAZARD...60 mph wind gusts.

  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...
  Leesburg, Culpeper, Front Royal, Broadlands, Lansdowne, Brambleton,
  Warrenton, Strasburg, Orange, Madison, Ashburn, Linton Hall, Luray,
  Bealeton, Shenandoah, Stephens City, Haymarket, Stanley, Middleburg
  and Stanardsville.
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Mesoscale Discussion 0242
   NWS Storm Prediction Center Norman OK
   1125 AM CST Wed Mar 01 2017

   Areas affected...South-central PA...far eastern
   WV...MD...DC...VA...and far northwestern NC

   Concerning...Severe Thunderstorm Watch 56...

   Valid 011725Z - 011830Z

   The severe weather threat for Severe Thunderstorm Watch 56
   continues.

   SUMMARY...Although storms have weakened recently, they are expected
   to strengthen again and pose a damaging wind threat across the
   remainder of Severe Thunderstorm Watch 56 through the afternoon.

   DISCUSSION...Recent radar trends have shown weakening in the
   vertical depth of the line of convection as it crossed the higher
   terrain of the Appalachian Mountains and encountered only a
   marginally unstable airmass. Lightning trends have trended downward
   as well. With time, this line should re-intensify across
   central/western VA and into far northwestern NC as it encounters a
   more buoyant airmass characterized by surface dewpoints in the upper
   50s to lower 60s and MLCAPE ranging from 250-1000 J/kg. Damaging
   winds will remain the primary threat. Although not immediately
   likely, there may also be some increase in the threat for a tornado
   or two with eastward extent across Severe Thunderstorm Watch 56
   (including the DC and Baltimore metro areas), as southerly to
   southwesterly low-level flow veers and strengthens with height, with
   enough effective SRH to support embedded circulations within the
   line.

   ..Gleason.. 03/01/2017


   ATTN...WFO...CTP...LWX...RNK...
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Days like this I really miss TWC. It was always hilariously overhyped but it was good background noise to listen to when I was in weather mode. Accuweather looks like it's being televised from a local elementary school on a budget of popsicle sticks.

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BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Baltimore MD/Washington DC
1232 PM EST WED MAR 1 2017

The National Weather Service in Sterling Virginia has issued a

* Severe Thunderstorm Warning for...
  Nelson County in central Virginia...
  Southeastern Madison County in northwestern Virginia...
  The City of Charlottesville in central Virginia...
  Orange County in central Virginia...
  Southeastern Rockingham County in western Virginia...
  Albemarle County in central Virginia...
  Southern Greene County in central Virginia...
  East central Augusta County in western Virginia...

* Until 115 PM EST

* At 1232 PM EST, severe thunderstorms were located along a line
  extending from 10 miles southeast of Massanutten to near
  Lowesville, moving east at 50 mph.

  HAZARD...60 mph wind gusts.

  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...
  Charlottesville, Orange, Crozet, Shipman, Schuyler, Free Union,
  Wintergreen, Afton, Campbell, Westmoreland, Hollymead,
  Gordonsville, Ruckersville, Nellysford, Ivy, Arrington,
  Scottsville, Esmont, Lovingston and Piney River.
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