Alert archive / Kansas / Mesoscale Discussions in 2018

Mesoscale Discussion 654

June 6, 20188 counties in Colorado; 23 counties in Kansas; 19 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jun 6, 2018, 2:49 PM MDT for 8 counties in Colorado; 23 counties in Kansas; 19 counties in Nebraska. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued: Jun 6, 2018, 2:49 PM MDT (20:49 UTC)
Expired: Jun 6, 2018, 4:15 PM MDT
In force: 86 min
Issued by: the Storm Prediction Center
Chance of a watch: 80%

All 50 counties

Adams County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO, Yuma County, CO, Cheyenne County, KS, Decatur County, KS, Finney County, KS, Ford County, KS, Gove County, KS, Graham County, KS, Gray County, KS, Greeley County, KS, Haskell County, KS, Hodgeman County, KS, Kearny County, KS, Lane County, KS, Logan County, KS, Ness County, KS, Norton County, KS, Rawlins County, KS, Scott County, KS, Sheridan County, KS, Sherman County, KS, Thomas County, KS, Trego County, KS, Wallace County, KS, Wichita County, KS, Arthur County, NE, Chase County, NE, Cheyenne County, NE, Deuel County, NE, Dundy County, NE, Frontier County, NE, Furnas County, NE, Garden County, NE, Gosper County, NE, Grant County, NE, Hayes County, NE, Hitchcock County, NE, Keith County, NE, Kimball County, NE, Lincoln County, NE, McPherson County, NE, Morrill County, NE, Perkins County, NE, Red Willow County, NE

The radar

The Goodland radar (KGLD), 18 km from the middle of the area, began a volume at 20:48 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.

Severe Thunderstorm Watch 158Jun 6, 4:45 PM MDT

The nearest sounding before it

Denver, CO (KDEN), launched 12:00Z, 8.8 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 3735 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: -16 m²/s²
0-3 km storm-relative helicity: -23 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.

Issued	Product	Office	Counties	Lasted
Jun 6, 4:46 PM MDT	Severe Thunderstorm Watch	SPC	Cheyenne, Kit Carson, Logan, Morgan, Phillips, Sedgwick and 3 more	8 hr
Jun 6, 2:23 PM MDT	Severe Thunderstorm Watch	SPC	Republic, Washington	9 hr
Jun 6, 1:22 PM MDT	Mesoscale Discussion	SPC	Boone, Burt, Butler, Cass, Clay, Colfax and 31 more	113 min
Jun 6, 5:20 PM MDT	Mesoscale Discussion	SPC	Adams, Boone, Burt, Butler, Cass, Clay and 33 more	85 min

Nearby

Mesoscale Discussions in Kansas, 2018 Mesoscale Discussions in Nebraska, 2018 Mesoscale Discussions in Colorado, 2018 Every mesoscale discussion in 2018

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.