Alert archive / Illinois / Mesoscale Discussions in 2013

Mesoscale Discussion 2013

November 17, 20134 states

The Storm Prediction Center issued this mesoscale discussion at Nov 17, 2013, 10:49 AM CST for 4 states. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued
Nov 17, 2013, 10:49 AM CST (16:49 UTC)
Expired
Nov 17, 2013, 12:15 PM CST
In force
86 min
Issued by
the Storm Prediction Center
All 72 counties

Bond County, IL, Boone County, IL, Bureau County, IL, Calhoun County, IL, Cass County, IL, Champaign County, IL, Christian County, IL, Clay County, IL, Clinton County, IL, Coles County, IL, Cook County, IL, Cumberland County, IL, DeKalb County, IL, DeWitt County, IL, Douglas County, IL, DuPage County, IL, Effingham County, IL, Fayette County, IL, Ford County, IL, Fulton County, IL, Greene County, IL, Grundy County, IL, Iroquois County, IL, Jasper County, IL, Jersey County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, Knox County, IL, Lake County, IL, LaSalle County, IL, Lee County, IL, Livingston County, IL, Logan County, IL, Macon County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Marshall County, IL, Mason County, IL, McHenry County, IL, McLean County, IL, Menard County, IL, Monroe County, IL, Montgomery County, IL, Morgan County, IL, Moultrie County, IL, Ogle County, IL, Peoria County, IL, Piatt County, IL, Putnam County, IL, Saint Clair County, IL, Sangamon County, IL, Scott County, IL, Shelby County, IL, Stark County, IL, Tazewell County, IL, Vermilion County, IL, Washington County, IL, Will County, IL, Winnebago County, IL, Woodford County, IL, Lake County, IN, Newton County, IN, City of Saint Louis, MO, Lincoln County, MO, Saint Charles County, MO, Saint Louis County, MO, Kenosha County, WI, Milwaukee County, WI, Racine County, WI, Walworth County, WI

The radar

The Lincoln radar (KILX), 34 km from the middle of the area, began a volume at 16:49 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, 4.8 hours before the alert went out and 45 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 2013-11-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1021 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, Lincoln, IL at 12:00Z on 2013-11-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 398 square meters per square second.1939587897117Sfc1 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
1021 J/kg
Mixed-layer CIN
-53 J/kg
Mixed-layer LCL
506 m above ground
0-6 km bulk shear
67 kt
0-1 km storm-relative helicity
398 m²/s²
0-3 km storm-relative helicity
396 m²/s²
Significant tornado parameter
2.7
Supercell composite
11.0

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
Nov 16, 11:29 PM CSTMesoscale DiscussionSPCAlexander, Jackson, Johnson, Pulaski, Union, Williamson61 min
Nov 17, 2:06 AM CSTMesoscale DiscussionSPCAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 14 more84 min
Nov 17, 7:47 AM CSTMesoscale DiscussionSPCAdams, Bond, Brown, Bureau, Calhoun, Carroll and 55 more88 min
Nov 17, 8:40 AM CSTTornado Watch PDSSPCAdams, Bond, Boone, Brown, Bureau, Calhoun and 77 more7 hr
Nov 17, 10:17 AM CSTMesoscale DiscussionSPCAlexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 10 more118 min
Nov 17, 10:43 AM CSTTornado WatchSPCAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more8 hr
Nov 17, 11:57 AM CSTMesoscale DiscussionSPCChampaign, Coles, Cook, DeWitt, Douglas, DuPage and 11 more93 min
Nov 17, 11:57 AM CSTMesoscale DiscussionSPCAlexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 10 more93 min
Nov 17, 1:05 PM CSTMesoscale DiscussionSPCAlexander, Hamilton, Johnson, Massac, Pope, Pulaski and 4 more55 min
Nov 17, 1:13 PM CSTMesoscale DiscussionSPCClark, Crawford, Edgar, Edwards, Jasper, Lawrence and 3 more77 min
Nov 17, 2:43 PM CSTMesoscale DiscussionSPCAlexander, Edwards, Gallatin, Hamilton, Hardin, Johnson and 8 more62 min
Nov 17, 10:01 AM CSTMesoscale DiscussionSPCAdams, Allen, Bartholomew, Benton, Blackford, Boone and 56 more119 min
Nov 17, 10:20 AM CSTTornado Watch PDSSPCAdams, Allen, Bartholomew, Blackford, Boone, Brown and 65 more9 hr
Nov 17, 1:34 PM CSTMesoscale DiscussionSPCClark, Crawford, Floyd, Harrison, Perry, Washington56 min
Nov 17, 1:58 PM CSTTornado WatchSPCClark, Crawford, Dubois, Floyd, Harrison, Jefferson and 4 more6 hr
Nov 17, 2:51 PM CSTMesoscale DiscussionSPCAdams, Allen, Bartholomew, Blackford, Brown, Clay and 34 more84 min
Nov 17, 3:46 PM CSTMesoscale DiscussionSPCClark, Crawford, Dubois, Floyd, Harrison, Orange and 7 more89 min
Nov 16, 7:53 PM CSTMesoscale DiscussionSPCAdair, Andrew, Buchanan, Caldwell, Carroll, Chariton and 16 more67 min

Nearby

Mesoscale Discussions in Illinois, 2013Mesoscale Discussions in Missouri, 2013Mesoscale Discussions in Wisconsin, 2013Every mesoscale discussion in 2013

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.