Alert archive / Virginia / Special Weather Statements in 2011

Special Weather Statement, NWS Baltimore/Washington

July 20, 20116 counties in Virginia

NWS Baltimore/Washington issued this special weather statement at Jul 20, 2011, 1:13 PM EDT for 6 counties in Virginia. It was in force for 62 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 20, 2011, 1:13 PM EDT (17:13 UTC)
Expired: Jul 20, 2011, 2:15 PM EDT
In force: 62 min
Issued by: NWS Baltimore/Washington

Counties Albemarle County, VA, City of Charlottesville, VA, Greene County, VA, Madison County, VA, Nelson County, VA, Rappahannock County, VA

The radar

The Sterling radar (KLWX), 139 km from the middle of the area, began a volume at 17:16 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 nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 5.2 hours before the alert went out and 126 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: 975 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 578 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 11 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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>

What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Baltimore/Washington wrote its last area forecast discussion before this special weather statement went out at Jul 20, 10:36 AM EDT, 2 hours 37 minutes earlier.

Area forecast discussion, Jul 20, 10:36 AM EDT, 2 hours 37 minutes before

<!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>

Hazardous weather outlook, Jul 20, 3:23 AM EDT, 9 hours 50 minutes before

<!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>

In the hours before

Special weather statement, Jul 20, 1:13 PM EDT, 0 minutes before

<!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>

The office that day

Everything else NWS Baltimore/Washington issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 19, 8:18 PM EDT	Special Marine Warning	LWX		99 min
Jul 19, 9:11 PM EDT	Special Marine Warning	LWX		49 min
Jul 19, 10:17 PM EDT	Special Marine Warning	LWX		33 min
Jul 19, 10:30 PM EDT	Special Weather Statement	LWX	King George	30 min
Jul 19, 10:37 PM EDT	Severe Thunderstorm Warning	LWX	King George	23 min
Jul 20, 2:50 PM EDT	Special Weather Statement	LWX	Augusta, Highland, City of Staunton	55 min
Jul 20, 2:54 PM EDT	Special Weather Statement	LWX	Madison	66 min
Jul 20, 3:19 PM EDT	Excessive Heat Warning	LWX	Arlington, Clarke, Culpeper, Fairfax, Fauquier, Frederick and 21 more	31 hr
Jul 20, 3:19 PM EDT	Excessive Heat Warning	LWX	Arlington, Clarke, Culpeper, Fairfax, Fauquier, Frederick and 21 more	54 hr
Jul 20, 6:29 PM EDT	Special Weather Statement	LWX	City of Buena Vista	61 min
Jul 20, 6:49 PM EDT	Areal Flood Advisory	LWX	Augusta, Nelson	84 min
Jul 19, 8:02 PM EDT	Severe Thunderstorm Warning	LWX	Calvert, Saint Mary's	43 min
Jul 19, 8:45 PM EDT	Special Weather Statement	LWX	Charles, Saint Mary's	45 min
Jul 19, 10:14 PM EDT	Special Weather Statement	LWX	Baltimore	31 min
Jul 19, 11:17 PM EDT	Special Weather Statement	LWX	Saint Mary's	28 min
Jul 20, 3:05 PM EDT	Special Weather Statement	LWX	Prince George's	55 min
Jul 20, 4:14 PM EDT	Special Weather Statement	LWX	Berkeley	61 min
Jul 20, 4:45 PM EDT	Areal Flood Advisory	LWX	Berkeley, Morgan	48 min

Nearby

Special Weather Statements in Virginia, 2011 Every special weather statement in 2011

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.