Alert archive / Kansas / Mesoscale Discussions in 2018

Mesoscale Discussion 1087

July 19, 201816 counties in Kansas; Platte County, Missouri

The Storm Prediction Center issued this mesoscale discussion at Jul 19, 2018, 2:43 PM CDT for 16 counties in Kansas; Platte County, Missouri. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued: Jul 19, 2018, 2:43 PM CDT (19:43 UTC)
Expired: Jul 19, 2018, 4:15 PM CDT
In force: 92 min
Issued by: the Storm Prediction Center

Counties Atchison County, KS, Douglas County, KS, Franklin County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Johnson County, KS, Leavenworth County, KS, Miami County, KS, Morris County, KS, Osage County, KS, Pottawatomie County, KS, Riley County, KS, Shawnee County, KS, Wabaunsee County, KS, Wyandotte County, KS, Platte County, MO

The radar

The Topeka radar (KTWX), 37 km from the middle of the area, began a volume at 19:44 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

Topeka, KS (KFOE), launched 12:00Z, 7.7 hours before the alert went out and 15 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: 2062 J/kg
Mixed-layer CIN: -69 J/kg
Mixed-layer LCL: 944 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 165 m²/s²
0-3 km storm-relative helicity: 198 m²/s²
Significant tornado parameter: 1.7
Supercell composite: 9.8

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
Jul 18, 9:21 PM CDT	Mesoscale Discussion	SPC	Clay, Cloud, Jewell, Lincoln, Marshall, Mitchell and 6 more	114 min
Jul 19, 12:47 AM CDT	Mesoscale Discussion	SPC	Marshall, Nemaha, Washington	118 min
Jul 19, 1:00 AM CDT	Severe Thunderstorm Watch	SPC	Atchison, Brown, Doniphan, Jackson, Marshall, Nemaha and 3 more	5 hr
Jul 19, 3:52 AM CDT	Mesoscale Discussion	SPC	Atchison, Brown, Doniphan, Geary, Jackson, Jefferson and 7 more	53 min
Jul 19, 11:37 AM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Atchison, Chase, Clay, Cloud and 38 more	113 min
Jul 19, 12:26 PM CDT	Severe Thunderstorm Watch	SPC	Allen, Anderson, Atchison, Barton, Bourbon, Chase and 43 more	8 hr
Jul 19, 5:42 PM CDT	Mesoscale Discussion	SPC	Barber, Clark, Comanche, Edwards, Finney, Ford and 10 more	3 hr
Jul 19, 9:58 AM CDT	Mesoscale Discussion	SPC	Andrew, Bates, Benton, Boone, Caldwell, Callaway and 45 more	2 hr
Jul 19, 11:22 AM CDT	Severe Thunderstorm Watch	SPC	Barry, Barton, Bates, Benton, Caldwell, Callaway and 47 more	10 hr
Jul 19, 2:15 PM CDT	Mesoscale Discussion	SPC	Bollinger, Butler, Carter, Christian, Dallas, Dent and 27 more	2 hr
Jul 19, 2:32 PM CDT	Mesoscale Discussion	SPC	Mercer, Putnam, Schuyler	118 min
Jul 19, 3:11 PM CDT	Tornado Watch	SPC	Clark, Scotland	6 hr
Jul 19, 5:18 PM CDT	Mesoscale Discussion	SPC	Clark, Schuyler, Scotland	57 min
Jul 19, 6:26 PM CDT	Mesoscale Discussion	SPC	Clark, Knox, Lewis, Lincoln, Marion, Pike and 1 more	64 min
Jul 19, 6:49 PM CDT	Severe Thunderstorm Watch	SPC	Knox, Lewis, Lincoln, Marion, Pike, Ralls and 4 more	7 hr

Nearby

Mesoscale Discussions in Kansas, 2018 Mesoscale Discussions in Missouri, 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.