Alert archive / Oklahoma / Mesoscale Discussions in 2022

Mesoscale Discussion 2008

December 13, 202210 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Dec 13, 2022, 1:44 AM CST for 10 counties in Oklahoma. It was in force for 61 min.

The area

The outline as issued.

The facts

Issued: Dec 13, 2022, 1:44 AM CST (07:44 UTC)
Expired: Dec 13, 2022, 2:45 AM CST
In force: 61 min
Issued by: the Storm Prediction Center
Concerning: Severe thunderstorm watch 579

Counties Alfalfa County, OK, Garfield County, OK, Grant County, OK, Kay County, OK, Kingfisher County, OK, Lincoln County, OK, Logan County, OK, Noble County, OK, Pawnee County, OK, Payne County, OK

The radar

The Vance AFB radar (KVNX), 91 km from the middle of the area, began a volume at 07:44 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

Norman, OK (KOUN), launched 00:00Z, 7.7 hours before the alert went out and 119 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: 4 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 422 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 470 m²/s²
0-3 km storm-relative helicity: 482 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

<!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
Dec 12, 7:12 PM CST	Mesoscale Discussion	SPC	Beaver, Texas	3 hr
Dec 12, 8:25 PM CST	Tornado Watch	SPC	Beaver, Texas	4 hr
Dec 12, 9:10 PM CST	Mesoscale Discussion	SPC	Beckham, Custer, Dewey, Ellis, Greer, Harmon and 7 more	3 hr
Dec 12, 9:16 PM CST	Tornado Watch	SPC	Ellis, Harper, Woods, Woodward	5 hr
Dec 12, 9:54 PM CST	Tornado Watch	SPC	Alfalfa, Beckham, Blaine, Caddo, Comanche, Cotton and 13 more	6 hr
Dec 12, 11:24 PM CST	Mesoscale Discussion	SPC	Beckham, Custer, Dewey, Ellis, Greer, Harmon and 6 more	2 hr
Dec 13, 3:07 AM CST	Mesoscale Discussion	SPC	Atoka, Bryan, Carter, Cleveland, Coal, Garvin and 12 more	113 min
Dec 13, 3:58 AM CST	Tornado Watch	SPC	Atoka, Bryan, Carter, Coal, Cotton, Hughes and 9 more	7 hr
Dec 13, 6:00 AM CST	Mesoscale Discussion	SPC	Love	90 min
Dec 13, 8:59 AM CST	Mesoscale Discussion	SPC	Bryan, Choctaw, McCurtain, Pushmataha	2 hr
Dec 13, 9:07 AM CST	Tornado Watch	SPC	Choctaw, McCurtain, Pushmataha	8 hr

Nearby

Mesoscale Discussions in Oklahoma, 2022 Every mesoscale discussion in 2022

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.