Alert archive / Virginia / Mesoscale Discussions in 2005

Mesoscale Discussion 1996

August 16, 200547 counties in Virginia

The Storm Prediction Center issued this mesoscale discussion at Aug 16, 2005, 6:21 PM EDT for 47 counties in Virginia. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued: Aug 16, 2005, 6:21 PM EDT (22:21 UTC)
Expired: Aug 16, 2005, 7:45 PM EDT
In force: 84 min
Issued by: the Storm Prediction Center

All 47 counties

Amelia County, VA, Brunswick County, VA, Caroline County, VA, Charles City County, VA, Chesterfield County, VA, City of Chesapeake, VA, City of Colonial Heights, VA, City of Emporia, VA, City of Franklin, VA, City of Hampton, VA, City of Hopewell, VA, City of Newport News, VA, City of Norfolk, VA, City of Petersburg, VA, City of Poquoson, VA, City of Portsmouth, VA, City of Richmond, VA, City of Suffolk, VA, City of Virginia Beach, VA, City of Williamsburg, VA, Dinwiddie County, VA, Essex County, VA, Gloucester County, VA, Goochland County, VA, Greensville County, VA, Hanover County, VA, Henrico County, VA, Isle of Wight County, VA, James City County, VA, King and Queen County, VA, King William County, VA, Lancaster County, VA, Louisa County, VA, Lunenburg County, VA, Mathews County, VA, Middlesex County, VA, New Kent County, VA, Northampton County, VA, Nottoway County, VA, Powhatan County, VA, Prince George County, VA, Richmond County, VA, Southampton County, VA, Spotsylvania County, VA, Surry County, VA, Sussex County, VA, York County, VA

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 12:00Z, 10.4 hours before the alert went out and 175 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 477 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 686 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: -8 m²/s²
0-3 km storm-relative helicity: 27 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.7

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 16, 1:13 PM EDT	Mesoscale Discussion	SPC	Albemarle, Alleghany, Amherst, Appomattox, Augusta, Bath and 38 more	62 min
Aug 16, 1:30 PM EDT	Severe Thunderstorm Watch	SPC	Alleghany, Amherst, Appomattox, Augusta, Bath, Bedford and 39 more	8 hr
Aug 16, 3:09 PM EDT	Mesoscale Discussion	SPC	Amelia, Brunswick, Caroline, Charles City, Chesterfield, Cumberland and 43 more	36 min
Aug 16, 3:55 PM EDT	Severe Thunderstorm Watch	SPC	Albemarle, Amelia, Brunswick, Buckingham, Caroline, Charles City and 57 more	6 hr
Aug 16, 5:02 PM EDT	Mesoscale Discussion	SPC	Albemarle, Alleghany, Amherst, Appomattox, Augusta, Bath and 43 more	58 min
Aug 16, 7:57 PM EDT	Mesoscale Discussion	SPC	Amelia, Brunswick, Charles City, Charlotte, Chesterfield, Dinwiddie and 29 more	93 min

Nearby

Mesoscale Discussions in Virginia, 2005 Every mesoscale discussion in 2005

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.