Alert archive / Virginia / Mesoscale Discussions in 2005

Mesoscale Discussion 1696

July 7, 2005Charles County, Maryland; 26 counties in North Carolina; 45 counties in Virginia

The Storm Prediction Center issued this mesoscale discussion at Jul 7, 2005, 6:01 PM EDT for Charles County, Maryland; 26 counties in North Carolina; 45 counties in Virginia. It was in force for 59 min.

The area

The outline as issued.

The facts

Issued: Jul 7, 2005, 6:01 PM EDT (22:01 UTC)
Expired: Jul 7, 2005, 7:00 PM EDT
In force: 59 min
Issued by: the Storm Prediction Center

All 72 counties

Charles County, MD, Bertie County, NC, Camden County, NC, Chatham County, NC, Chowan County, NC, Currituck County, NC, Dare County, NC, Edgecombe County, NC, Franklin County, NC, Gates County, NC, Granville County, NC, Guilford County, NC, Halifax County, NC, Hertford County, NC, Hyde County, NC, Martin County, NC, Montgomery County, NC, Nash County, NC, Northampton County, NC, Pasquotank County, NC, Perquimans County, NC, Randolph County, NC, Rockingham County, NC, Stanly County, NC, Tyrrell County, NC, Union County, NC, Washington County, NC, Albemarle County, VA, Appomattox County, VA, Buckingham County, VA, Campbell County, VA, Caroline County, VA, Charlotte County, VA, Chesterfield County, VA, City of Charlottesville, VA, City of Chesapeake, VA, City of Franklin, VA, City of Fredericksburg, VA, City of Hampton, VA, City of Hopewell, VA, City of Lynchburg, VA, City of Manassas, VA, City of Manassas Park, VA, City of Newport News, VA, City of Norfolk, VA, City of Poquoson, VA, City of Portsmouth, VA, City of Richmond, VA, City of Suffolk, VA, City of Virginia Beach, VA, Culpeper County, VA, Cumberland County, VA, Essex County, VA, Fauquier County, VA, Fluvanna County, VA, Franklin County, VA, Goochland County, VA, Greene County, VA, Halifax County, VA, Hanover County, VA, Isle of Wight County, VA, King George County, VA, King William County, VA, Louisa County, VA, Madison County, VA, Nelson County, VA, Orange County, VA, Powhatan County, VA, Prince William County, VA, Spotsylvania County, VA, Stafford County, VA, Surry County, VA

The radar

The Norfolk radar (KAKQ), 115 km from the middle of the area, began a volume at 22:02 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Tornado Watch 624Jul 7, 9:40 PM EDT

The nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 10.0 hours before the alert went out and 109 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: 279 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 933 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 43 m²/s²
0-3 km storm-relative helicity: 98 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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
Jul 7, 1:47 AM EDT	Mesoscale Discussion	SPC	Cherokee, Clay, Macon, Polk, Transylvania	28 min
Jul 7, 3:10 AM EDT	Tornado Watch	SPC	Cabarrus, Catawba, Cleveland, Davie, Gaston, Henderson and 8 more	6 hr
Jul 7, 5:44 AM EDT	Mesoscale Discussion	SPC	Alexander, Burke, Cabarrus, Catawba, Cleveland, Davie and 10 more	91 min
Jul 7, 8:43 AM EDT	Mesoscale Discussion	SPC	Alamance, Alexander, Anson, Burke, Cabarrus, Caldwell and 33 more	32 min
Jul 7, 9:00 AM EDT	Tornado Watch	SPC	Alamance, Alexander, Burke, Cabarrus, Caldwell, Caswell and 27 more	7 hr
Jul 7, 12:33 PM EDT	Mesoscale Discussion	SPC	Alexander, Burke, Caldwell, Caswell, Catawba, Cleveland and 15 more	117 min
Jul 7, 1:17 PM EDT	Mesoscale Discussion	SPC	Bertie, Chowan, Dare, Edgecombe, Halifax, Hertford and 8 more	88 min
Jul 7, 2:05 PM EDT	Tornado Watch	SPC	Bertie, Camden, Chowan, Currituck, Dare, Edgecombe and 14 more	8 hr
Jul 7, 3:45 PM EDT	Tornado Watch	SPC	Alamance, Cabarrus, Caswell, Chatham, Davidson, Davie and 17 more	6 hr
Jul 7, 4:47 PM EDT	Mesoscale Discussion	SPC	Halifax, Northampton	118 min

Nearby

Mesoscale Discussions in Virginia, 2005 Mesoscale Discussions in North Carolina, 2005 Mesoscale Discussions in Maryland, 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; radar from the NEXRAD Level II archive.