Alert archive / Illinois / Mesoscale Discussions in 2016

Mesoscale Discussion 603

May 11, 201639 counties in Illinois; Gibson County, Indiana; 6 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at May 11, 2016, 2:19 PM CDT for 39 counties in Illinois; Gibson County, Indiana; 6 counties in Missouri. It was in force for 56 min.

The area

The outline as issued.

The facts

Issued
May 11, 2016, 2:19 PM CDT (19:19 UTC)
Expired
May 11, 2016, 3:15 PM CDT
In force
56 min
Issued by
the Storm Prediction Center
All 46 counties

Bond County, IL, Brown County, IL, Calhoun County, IL, Cass County, IL, Christian County, IL, Clark County, IL, Clay County, IL, Clinton County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, Douglas County, IL, Edgar County, IL, Edwards County, IL, Effingham County, IL, Fayette County, IL, Greene County, IL, Jasper County, IL, Jefferson County, IL, Jersey County, IL, Lawrence County, IL, Macon County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Monroe County, IL, Montgomery County, IL, Morgan County, IL, Moultrie County, IL, Piatt County, IL, Pike County, IL, Richland County, IL, Saint Clair County, IL, Sangamon County, IL, Scott County, IL, Shelby County, IL, Wabash County, IL, Washington County, IL, Wayne County, IL, Gibson County, IN, City of Saint Louis, MO, Franklin County, MO, Jefferson County, MO, Lincoln County, MO, Saint Charles County, MO, Saint Louis County, MO

The radar

The Lincoln radar (KILX), 102 km from the middle of the area, began a volume at 19:22 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

Lincoln, IL (KILX), launched 12:00Z, 7.3 hours before the alert went out and 134 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, Lincoln, IL at 12:00Z on 2016-05-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Lincoln, IL at 12:00Z on 2016-05-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
905 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
120 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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
May 11, 11:20 AM CDTMesoscale DiscussionSPCBond, Calhoun, Christian, Clay, Clinton, Effingham and 11 more55 min
May 11, 12:10 PM CDTSevere Thunderstorm WatchSPCBond, Calhoun, Cass, Champaign, Christian, Clark and 48 more12 hr
May 11, 3:39 PM CDTMesoscale DiscussionSPCLawrence, Wabash66 min
May 11, 5:30 PM CDTMesoscale DiscussionSPCGallatin, Hardin2 hr
May 11, 6:30 PM CDTSevere Thunderstorm WatchSPCBond, Calhoun, Clinton, Franklin, Gallatin, Greene and 19 more7 hr
May 11, 3:55 PM CDTSevere Thunderstorm WatchSPCBartholomew, Brown, Clay, Crawford, Daviess, Dubois and 25 more5 hr
May 11, 2:02 AM CDTMesoscale DiscussionSPCAndrew, Atchison, Bates, Buchanan, Caldwell, Cass and 9 more118 min
May 11, 3:10 AM CDTSevere Thunderstorm WatchSPCAndrew, Atchison, Bates, Buchanan, Caldwell, Cass and 12 more5 hr
May 11, 5:34 AM CDTMesoscale DiscussionSPCAndrew, Atchison, Bates, Benton, Buchanan, Caldwell and 28 more101 min
May 11, 3:07 PM CDTMesoscale DiscussionSPCAudrain, Boone, Callaway, Camden, Christian, Cole and 27 more53 min

Nearby

Mesoscale Discussions in Illinois, 2016Mesoscale Discussions in Missouri, 2016Mesoscale Discussions in Indiana, 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.