Alert archive / Missouri / Mesoscale Discussions in 2015

Mesoscale Discussion 189

April 2, 20154 states

The Storm Prediction Center issued this mesoscale discussion at Apr 2, 2015, 4:47 PM CDT for 4 states. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued: Apr 2, 2015, 4:47 PM CDT (21:47 UTC)
Expired: Apr 2, 2015, 6:15 PM CDT
In force: 88 min
Issued by: the Storm Prediction Center
Chance of a watch: 80%

All 30 counties

Benton County, AR, Carroll County, AR, Chautauqua County, KS, Cherokee County, KS, Cowley County, KS, Crawford County, KS, Elk County, KS, Labette County, KS, Montgomery County, KS, Neosho County, KS, Wilson County, KS, Barry County, MO, Barton County, MO, Cedar County, MO, Christian County, MO, Dade County, MO, Greene County, MO, Jasper County, MO, Lawrence County, MO, McDonald County, MO, Newton County, MO, Polk County, MO, Stone County, MO, Craig County, OK, Delaware County, OK, Mayes County, OK, Nowata County, OK, Ottawa County, OK, Rogers County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 108 km from the middle of the area, began a volume at 21:48 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.

Tornado Watch 17Apr 2, 7:05 PM CDT

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 9.8 hours before the alert went out and 147 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: 543 J/kg
Mixed-layer CIN: -253 J/kg
Mixed-layer LCL: 822 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 395 m²/s²
0-3 km storm-relative helicity: 286 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
Apr 2, 11:50 AM CDT	Mesoscale Discussion	SPC	Clay, Craighead, Crittenden, Cross, Greene, Jackson and 4 more	85 min
Apr 1, 7:26 PM CDT	Mesoscale Discussion	SPC	Harper	64 min
Apr 1, 8:25 PM CDT	Mesoscale Discussion	SPC	Cloud, Jewell, Mitchell, Osborne, Republic, Smith and 1 more	95 min
Apr 1, 11:36 PM CDT	Mesoscale Discussion	SPC	Cloud, Marshall, Republic, Washington	54 min
Apr 2, 1:37 AM CDT	Mesoscale Discussion	SPC	Atchison, Brown, Doniphan, Douglas, Geary, Jackson and 9 more	113 min
Apr 2, 5:22 AM CDT	Mesoscale Discussion	SPC	Bourbon, Cherokee, Crawford, Linn, Miami	113 min
Apr 2, 2:46 PM CDT	Mesoscale Discussion	SPC	Camden, Crawford, Dallas, Dent, Douglas, Franklin and 22 more	89 min
Apr 2, 3:41 PM CDT	Mesoscale Discussion	SPC	Carter, Johnston, Love, Marshall, Murray, Pontotoc	2 hr

Nearby

Mesoscale Discussions in Missouri, 2015 Mesoscale Discussions in Kansas, 2015 Mesoscale Discussions in Oklahoma, 2015 Every mesoscale discussion in 2015

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.