Alert archive / Nebraska / Mesoscale Discussions in 2022

Mesoscale Discussion 539

April 22, 20224 states

The Storm Prediction Center issued this mesoscale discussion at Apr 22, 2022, 9:10 PM MDT for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Apr 22, 2022, 9:10 PM MDT (03:10 UTC)
Expired
Apr 22, 2022, 11:15 PM MDT
In force
2 hr
Issued by
the Storm Prediction Center
Concerning
Severe potential...watch possible
Chance of a watch
60%
All 29 counties

Kit Carson County, CO, Phillips County, CO, Sedgwick County, CO, Yuma County, CO, Cheyenne County, KS, Rawlins County, KS, Sherman County, KS, Wallace County, KS, Arthur County, NE, Box Butte County, NE, Chase County, NE, Dawes County, NE, Deuel County, NE, Dundy County, NE, Garden County, NE, Grant County, NE, Hayes County, NE, Hitchcock County, NE, Hooker County, NE, Keith County, NE, McPherson County, NE, Morrill County, NE, Perkins County, NE, Sheridan County, NE, Sioux County, NE, Bennett County, SD, Custer County, SD, Fall River County, SD, Oglala Lakota County, SD

The radar

The North Platte radar (KLNX), 164 km from the middle of the area, began a volume at 03:10 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 3.2 hours before the alert went out and 142 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, N. Platte/Lee Bi, NE at 00:00Z on 2022-04-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1353 joules per kilogram.LCLEL10008507005003002001001 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, N. Platte/Lee Bi, NE at 00:00Z on 2022-04-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 87 square meters per square second.19395878Sfc1 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
1353 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
2999 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
87 m²/s²
0-3 km storm-relative helicity
141 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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
Apr 22, 7:31 PM MDTMesoscale DiscussionSPCDecatur, Finney, Gove, Graham, Gray, Haskell and 6 more119 min
Apr 22, 9:36 PM MDTSevere Thunderstorm WatchSPCGraham, Norton, Osborne, Phillips, Rooks, Smith6 hr
Apr 22, 11:29 PM MDTMesoscale DiscussionSPCEllis, Finney, Ford, Gove, Grant, Gray and 19 more2 hr
Apr 22, 11:56 PM MDTSevere Thunderstorm WatchSPCBarton, Clark, Edwards, Ellis, Finney, Ford and 15 more4 hr
Apr 23, 1:07 AM MDTMesoscale DiscussionSPCGraham, Norton, Phillips, Smith2 hr
Apr 23, 12:16 PM MDTMesoscale DiscussionSPCAtchison, Brown, Butler, Chase, Clay, Dickinson and 25 more119 min
Apr 23, 1:10 PM MDTMesoscale DiscussionSPCAtchison, Brown, Doniphan2 hr
Apr 23, 3:01 PM MDTSevere Thunderstorm WatchSPCAtchison, Brown, Doniphan, Jackson, Johnson, Leavenworth and 4 more6 hr
Apr 23, 4:27 PM MDTMesoscale DiscussionSPCAllen, Anderson, Butler, Chase, Coffey, Cowley and 16 more93 min
Apr 23, 5:00 PM MDTSevere Thunderstorm WatchSPCAllen, Anderson, Butler, Chase, Chautauqua, Coffey and 19 more6 hr
Apr 22, 6:37 PM MDTMesoscale DiscussionSPCBeadle, Brown, Buffalo, Clark, Dewey, Edmunds and 12 more83 min
Apr 23, 11:03 AM MDTMesoscale DiscussionSPCBrookings, Brown, Clark, Codington, Day, Deuel and 7 more87 min
Apr 23, 11:32 AM MDTMesoscale DiscussionSPCButte, Custer, Fall River, Harding, Lawrence, Meade and 2 more5 hr
Apr 23, 11:55 AM MDTTornado WatchSPCDeuel, Grant, Marshall, Roberts6 hr

Nearby

Mesoscale Discussions in Nebraska, 2022Mesoscale Discussions in Colorado, 2022Mesoscale Discussions in Kansas, 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.