Alert archive / Missouri / Mesoscale Discussions in 2011

Mesoscale Discussion 398

April 10, 201110 counties in Illinois; 18 counties in Iowa; 37 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Apr 10, 2011, 5:03 PM CDT for 10 counties in Illinois; 18 counties in Iowa; 37 counties in Missouri. It was in force for 57 min.

The area

The outline as issued.

The facts

Issued
Apr 10, 2011, 5:03 PM CDT (22:03 UTC)
Expired
Apr 10, 2011, 6:00 PM CDT
In force
57 min
Issued by
the Storm Prediction Center
All 65 counties

Cedar County, IA, Clinton County, IA, Davis County, IA, Delaware County, IA, Des Moines County, IA, Dubuque County, IA, Henry County, IA, Jackson County, IA, Jefferson County, IA, Johnson County, IA, Jones County, IA, Lee County, IA, Linn County, IA, Louisa County, IA, Muscatine County, IA, Scott County, IA, Van Buren County, IA, Washington County, IA, Adams County, IL, Hancock County, IL, Henderson County, IL, Henry County, IL, Knox County, IL, McDonough County, IL, Mercer County, IL, Rock Island County, IL, Schuyler County, IL, Warren County, IL, Adair County, MO, Audrain County, MO, Barton County, MO, Benton County, MO, Boone County, MO, Callaway County, MO, Camden County, MO, Cedar County, MO, Chariton County, MO, Clark County, MO, Cole County, MO, Cooper County, MO, Dade County, MO, Dallas County, MO, Greene County, MO, Henry County, MO, Hickory County, MO, Howard County, MO, Jasper County, MO, Knox County, MO, Lawrence County, MO, Lewis County, MO, Macon County, MO, Marion County, MO, Miller County, MO, Moniteau County, MO, Monroe County, MO, Morgan County, MO, Pettis County, MO, Polk County, MO, Ralls County, MO, Randolph County, MO, Saline County, MO, Schuyler County, MO, Scotland County, MO, Shelby County, MO, St. Clair County, MO

The radar

The Quad Cities radar (KDVN), 204 km from the middle of the area, began a volume at 22:05 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, 10.1 hours before the alert went out and 209 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 2011-04-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 400 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 2011-04-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 549 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
400 J/kg
Mixed-layer CIN
-550 J/kg
Mixed-layer LCL
1420 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
549 m²/s²
0-3 km storm-relative helicity
529 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.

IssuedProductOfficeCountiesLasted
Apr 10, 1:30 PM CDTMesoscale DiscussionSPCCarroll, Jo Daviess, Stephenson2 hr
Apr 10, 6:05 PM CDTTornado WatchSPCAdams, Boone, Brown, Bureau, Calhoun, Carroll and 48 more7 hr
Apr 9, 7:42 PM CDTSevere Thunderstorm WatchSPCAllamakee, Chickasaw, Floyd, Howard, Mitchell, Winneshiek7 hr
Apr 9, 9:06 PM CDTMesoscale DiscussionSPCAudubon, Buena Vista, Calhoun, Carroll, Cass, Cherokee and 31 more54 min
Apr 9, 10:43 PM CDTMesoscale DiscussionSPCAllamakee, Black Hawk, Bremer, Buena Vista, Butler, Cerro Gordo and 25 more62 min
Apr 9, 11:01 PM CDTTornado WatchSPCAllamakee, Bremer, Buena Vista, Butler, Cerro Gordo, Cherokee and 19 more5 hr
Apr 10, 1:26 AM CDTMesoscale DiscussionSPCAllamakee, Buena Vista, Cerro Gordo, Chickasaw, Clay, Dickinson and 14 more64 min
Apr 10, 3:19 PM CDTTornado Watch PDSSPCAllamakee, Clayton, Fayette, Howard, Winneshiek7 hr

Nearby

Mesoscale Discussions in Missouri, 2011Mesoscale Discussions in Iowa, 2011Mesoscale Discussions in Illinois, 2011Every mesoscale discussion in 2011

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.