Alert archive / Missouri / Mesoscale Discussions in 2016

Mesoscale Discussion 1263

July 13, 201619 counties in Iowa; 29 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Jul 13, 2016, 10:33 AM CDT for 19 counties in Iowa; 29 counties in Missouri. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued
Jul 13, 2016, 10:33 AM CDT (15:33 UTC)
Expired
Jul 13, 2016, 12:30 PM CDT
In force
117 min
Issued by
the Storm Prediction Center
All 48 counties

Appanoose County, IA, Clarke County, IA, Davis County, IA, Decatur County, IA, Jasper County, IA, Jefferson County, IA, Keokuk County, IA, Lucas County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Monroe County, IA, Polk County, IA, Poweshiek County, IA, Tama County, IA, Van Buren County, IA, Wapello County, IA, Warren County, IA, Wayne County, IA, Adair County, MO, Boone County, MO, Caldwell County, MO, Carroll County, MO, Chariton County, MO, Cooper County, MO, Daviess County, MO, Grundy County, MO, Harrison County, MO, Howard County, MO, Johnson County, MO, Knox County, MO, Lafayette County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Mercer County, MO, Moniteau County, MO, Monroe County, MO, Morgan County, MO, Pettis County, MO, Putnam County, MO, Randolph County, MO, Ray County, MO, Saline County, MO, Schuyler County, MO, Scotland County, MO, Shelby County, MO, Sullivan County, MO

The radar

The Des Moines radar (KDMX), 165 km from the middle of the area, began a volume at 15:33 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.

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 3.6 hours before the alert went out and 253 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-pSkew-T log-p diagram, Davenport, at 12:00Z on 2016-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 834 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 12:00Z on 2016-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 61 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
834 J/kg
Mixed-layer CIN
-52 J/kg
Mixed-layer LCL
940 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
61 m²/s²
0-3 km storm-relative helicity
98 m²/s²
Significant tornado parameter
0.2
Supercell composite
0.4

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.

IssuedProductOfficeCountiesLasted
Jul 13, 7:34 AM CDTMesoscale DiscussionSPCBuena Vista, Cerro Gordo, Cherokee, Chickasaw, Clay, Dickinson and 16 more2 hr
Jul 13, 11:14 AM CDTSevere Thunderstorm WatchSPCAppanoose, Benton, Cedar, Clarke, Davis, Decatur and 26 more5 hr
Jul 13, 2:37 PM CDTSevere Thunderstorm WatchSPCClinton, Scott5 hr
Jul 13, 8:07 AM CDTSevere Thunderstorm WatchSPCAndrew, Bates, Buchanan, Cass, Clay, Clinton and 5 more5 hr
Jul 13, 2:10 PM CDTMesoscale DiscussionSPCSainte Genevieve, City of Saint Louis65 min
Jul 13, 5:08 PM CDTMesoscale DiscussionSPCBollinger, Butler, Cape Girardeau, Carter, Crawford, Dent and 18 more2 hr
Jul 13, 6:57 PM CDTMesoscale DiscussionSPCBarry, Barton, Cedar, Christian, Dade, Dallas and 12 more3 hr

Nearby

Mesoscale Discussions in Missouri, 2016Mesoscale Discussions in Iowa, 2016Every mesoscale discussion in 2016

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.