Alert archive / Missouri / Mesoscale Discussions in 2005

Mesoscale Discussion 2018

August 18, 20054 states

The Storm Prediction Center issued this mesoscale discussion at Aug 18, 2005, 4:49 PM CDT for 4 states. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued: Aug 18, 2005, 4:49 PM CDT (21:49 UTC)
Expired: Aug 18, 2005, 6:45 PM CDT
In force: 116 min
Issued by: the Storm Prediction Center

All 52 counties

Adams County, IL, Brown County, IL, Hancock County, IL, Pike County, IL, Schuyler County, IL, Atchison County, KS, Brown County, KS, Doniphan County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Leavenworth County, KS, Marshall County, KS, Nemaha County, KS, Pottawatomie County, KS, Riley County, KS, Shawnee County, KS, Wabaunsee County, KS, Wyandotte County, KS, Adair County, MO, Andrew County, MO, Buchanan County, MO, Caldwell County, MO, Carroll County, MO, Chariton County, MO, Clark County, MO, Clay County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Knox County, MO, Lewis County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Marion County, MO, Mercer County, MO, Monroe County, MO, Platte County, MO, Ralls County, MO, Randolph County, MO, Ray County, MO, Schuyler County, MO, Scotland County, MO, Shelby County, MO, Sullivan County, MO, Pawnee County, NE, Richardson County, NE

The radar

The Pleasant Hill radar (KEAX), 101 km from the middle of the area, began a volume at 21:53 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 731Aug 18, 5:35 PM CDT

The nearest sounding before it

Topeka, KS (KTOP), launched 12:00Z, 9.8 hours before the alert went out and 133 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: 1214 J/kg
Mixed-layer CIN: -109 J/kg
Mixed-layer LCL: 855 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 118 m²/s²
0-3 km storm-relative helicity: 158 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 4.9

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 18, 9:00 AM CDT	Mesoscale Discussion	SPC	Boone, Bureau, Carroll, Cook, DeKalb, DeWitt and 34 more	2 hr
Aug 18, 9:25 AM CDT	Severe Thunderstorm Watch	SPC	Boone, Cook, DeKalb, DuPage, Grundy, Kane and 8 more	6 hr
Aug 18, 1:16 PM CDT	Mesoscale Discussion	SPC	Ford, Grundy, Iroquois, Kankakee, Kendall, LaSalle and 2 more	89 min
Aug 18, 2:09 PM CDT	Mesoscale Discussion	SPC	Boone, Bureau, Carroll, Henry, Jo Daviess, Lee and 6 more	96 min
Aug 18, 5:35 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Brown, Cass, Fulton, Greene, Hancock and 9 more	6 hr
Aug 17, 7:56 PM CDT	Mesoscale Discussion	SPC	Boyd	2 hr
Aug 17, 9:22 PM CDT	Mesoscale Discussion	SPC	Boyd	23 min
Aug 18, 2:05 PM CDT	Mesoscale Discussion	SPC	Box Butte, Dawes, Scotts Bluff, Sioux	115 min

Nearby

Mesoscale Discussions in Missouri, 2005 Mesoscale Discussions in Kansas, 2005 Mesoscale Discussions in Illinois, 2005 Every mesoscale discussion in 2005

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.