Alert archive / Kansas / Mesoscale Discussions in 2017

Mesoscale Discussion 495

April 15, 2017Clark County, Comanche County, Kiowa County, Kansas; Ellis County, Harper County, Oklahoma; Lipscomb County, Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 15, 2017, 3:32 PM CDT for Clark County, Comanche County, Kiowa County, Kansas; Ellis County, Harper County, Oklahoma; Lipscomb County, Texas. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued: Apr 15, 2017, 3:32 PM CDT (20:32 UTC)
Expired: Apr 15, 2017, 5:00 PM CDT
In force: 88 min
Issued by: the Storm Prediction Center
Chance of a watch: 80%

Counties Clark County, KS, Comanche County, KS, Kiowa County, KS, Ellis County, OK, Harper County, OK, Lipscomb County, TX

The radar

The Dodge City radar (KDDC), 119 km from the middle of the area, began a volume at 20:30 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 144Apr 15, 4:00 PM CDT

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 8.5 hours before the alert went out and 234 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: 661 J/kg
Mixed-layer CIN: -358 J/kg
Mixed-layer LCL: 1199 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 227 m²/s²
0-3 km storm-relative helicity: 282 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
Apr 14, 9:17 PM CDT	Mesoscale Discussion	SPC	Jewell, Norton, Phillips, Republic, Smith	88 min
Apr 15, 4:00 PM CDT	Severe Thunderstorm Watch	SPC	Barber, Clark, Comanche, Edwards, Ford, Hodgeman and 4 more	7 hr
Apr 15, 4:30 PM CDT	Mesoscale Discussion	SPC	Atchison, Barton, Clay, Dickinson, Ellsworth, Geary and 14 more	90 min
Apr 15, 5:05 PM CDT	Severe Thunderstorm Watch	SPC	Atchison, Brown, Clay, Dickinson, Doniphan, Geary and 10 more	7 hr
Apr 14, 8:37 PM CDT	Mesoscale Discussion	SPC	Bailey, Castro, Deaf Smith, Hale, Lamb, Parmer and 2 more	113 min

Nearby

Mesoscale Discussions in Kansas, 2017 Mesoscale Discussions in Oklahoma, 2017 Mesoscale Discussions in Texas, 2017 Every mesoscale discussion in 2017

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.