Alert archive / Oklahoma / Mesoscale Discussions in 2022

Mesoscale Discussion 161

February 21, 20227 counties in Arkansas; 24 counties in Oklahoma; 14 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Feb 21, 2022, 6:41 PM CST for 7 counties in Arkansas; 24 counties in Oklahoma; 14 counties in Texas. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
Feb 21, 2022, 6:41 PM CST (00:41 UTC)
Expired
Feb 21, 2022, 9:15 PM CST
In force
3 hr
Issued by
the Storm Prediction Center
Concerning
Severe potential...watch likely
Chance of a watch
95%
All 45 counties

Benton County, AR, Crawford County, AR, Franklin County, AR, Johnson County, AR, Madison County, AR, Sebastian County, AR, Washington County, AR, Adair County, OK, Atoka County, OK, Bryan County, OK, Carter County, OK, Cherokee County, OK, Choctaw County, OK, Coal County, OK, Garvin County, OK, Haskell County, OK, Hughes County, OK, Jefferson County, OK, Johnston County, OK, Latimer County, OK, LeFlore County, OK, Love County, OK, Marshall County, OK, McIntosh County, OK, Murray County, OK, Muskogee County, OK, Pittsburg County, OK, Pontotoc County, OK, Pushmataha County, OK, Seminole County, OK, Sequoyah County, OK, Archer County, TX, Baylor County, TX, Clay County, TX, Cooke County, TX, Denton County, TX, Grayson County, TX, Jack County, TX, Montague County, TX, Palo Pinto County, TX, Shackelford County, TX, Stephens County, TX, Throckmorton County, TX, Wise County, TX, Young County, TX

The radar

The Norman radar (KTLX), 125 km from the middle of the area, began a volume at 00:42 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.

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 0.7 hours before the alert went out and 118 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-pSkew-T log-p diagram, Norman, OK at 00:00Z on 2022-02-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 00:00Z on 2022-02-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 420 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2214 m above ground
0-6 km bulk shear
75 kt
0-1 km storm-relative helicity
420 m²/s²
0-3 km storm-relative helicity
514 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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.

IssuedProductOfficeCountiesLasted
Feb 21, 8:49 PM CSTTornado WatchSPCBaxter, Benton, Boone, Carroll, Cleburne, Conway and 32 more7 hr
Feb 21, 11:37 PM CSTMesoscale DiscussionSPCConway, Franklin, Garland, Hot Spring, Howard, Johnson and 11 more113 min
Feb 22, 1:36 AM CSTMesoscale DiscussionSPCCleburne, Conway, Faulkner, Franklin, Garland, Johnson and 13 more84 min
Feb 22, 3:00 AM CSTMesoscale DiscussionSPCBaxter, Clay, Cleburne, Conway, Craighead, Cross and 24 more90 min
Feb 22, 3:52 AM CSTTornado WatchSPCClay, Cleburne, Craighead, Crittenden, Cross, Faulkner and 19 more6 hr
Feb 22, 5:46 AM CSTMesoscale DiscussionSPCCraighead, Crittenden, Cross, Lonoke, Mississippi, Monroe and 7 more89 min
Feb 22, 7:30 AM CSTMesoscale DiscussionSPCCrittenden, Cross, Lee, Monroe, St. Francis90 min
Feb 21, 7:22 PM CSTSevere Thunderstorm WatchSPCAtoka, Bryan, Carter, Coal, Cotton, Garvin and 9 more7 hr
Feb 21, 10:36 PM CSTMesoscale DiscussionSPCBryan, Love, Marshall114 min
Feb 22, 12:55 AM CSTMesoscale DiscussionSPCCallahan, Denton, Eastland, Fannin, Grayson, Palo Pinto and 2 more65 min

Nearby

Mesoscale Discussions in Oklahoma, 2022Mesoscale Discussions in Texas, 2022Mesoscale Discussions in Arkansas, 2022Every 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.