Alert archive / Kansas / Mesoscale Discussions in 2009

Mesoscale Discussion 1913

August 18, 20095 states

The Storm Prediction Center issued this mesoscale discussion at Aug 18, 2009, 7:41 PM MDT for 5 states. It was in force for 64 min.

The area

The outline as issued.

The facts

Issued: Aug 18, 2009, 7:41 PM MDT (01:41 UTC)
Expired: Aug 18, 2009, 8:45 PM MDT
In force: 64 min
Issued by: the Storm Prediction Center

All 51 counties

Baca County, CO, Cheyenne County, CO, Kiowa County, CO, Kit Carson County, CO, Prowers County, CO, Yuma County, CO, Cheyenne County, KS, Decatur County, KS, Finney County, KS, Gove County, KS, Grant County, KS, Gray County, KS, Greeley County, KS, Hamilton County, KS, Haskell County, KS, Kearny County, KS, Lane County, KS, Logan County, KS, Morton County, KS, Rawlins County, KS, Scott County, KS, Seward County, KS, Sheridan County, KS, Sherman County, KS, Stanton County, KS, Stevens County, KS, Thomas County, KS, Wallace County, KS, Wichita County, KS, Dundy County, NE, Hitchcock County, NE, Red Willow County, NE, Beaver County, OK, Cimarron County, OK, Texas County, OK, Armstrong County, TX, Carson County, TX, Dallam County, TX, Deaf Smith County, TX, Donley County, TX, Gray County, TX, Hansford County, TX, Hartley County, TX, Hutchinson County, TX, Moore County, TX, Ochiltree County, TX, Oldham County, TX, Potter County, TX, Randall County, TX, Roberts County, TX, Sherman County, TX

The radar

The Dodge City radar (KDDC), 192 km from the middle of the area, began a volume at 01:45 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

Dodge City, (KDDC), launched 00:00Z, 1.7 hours before the alert went out and 198 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: 1096 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 1442 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 115 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

<!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
Aug 19, 1:46 PM MDT	Mesoscale Discussion	SPC	Barton, Cloud, Edwards, Ellis, Ellsworth, Finney and 18 more	119 min
Aug 19, 3:02 PM MDT	Tornado Watch	SPC	Barber, Chautauqua, Comanche, Cowley, Harper, Sumner	7 hr
Aug 19, 5:51 PM MDT	Mesoscale Discussion	SPC	Atchison, Brown, Clay, Dickinson, Ellsworth, Geary and 13 more	54 min
Aug 18, 8:41 PM MDT	Mesoscale Discussion	SPC	Blaine, Boyd, Brown, Custer, Holt, Hooker and 6 more	64 min
Aug 19, 4:19 PM MDT	Mesoscale Discussion	SPC	Adams, Burt, Butler, Cass, Clay, Colfax and 28 more	26 min
Aug 19, 4:32 PM MDT	Severe Thunderstorm Watch	SPC	Boone, Burt, Butler, Cass, Cedar, Clay and 32 more	6 hr
Aug 18, 10:54 PM MDT	Severe Thunderstorm Watch	SPC	Beckham, Blaine, Caddo, Canadian, Carter, Cleveland and 22 more	3 hr
Aug 19, 12:24 AM MDT	Mesoscale Discussion	SPC	Blaine, Caddo, Canadian, Carter, Cleveland, Comanche and 18 more	96 min
Aug 19, 1:40 PM MDT	Mesoscale Discussion	SPC	Alfalfa, Blaine, Caddo, Canadian, Custer, Dewey and 12 more	95 min

Nearby

Mesoscale Discussions in Kansas, 2009 Mesoscale Discussions in Texas, 2009 Mesoscale Discussions in Colorado, 2009 Every mesoscale discussion in 2009

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.