Alert archive / Illinois / Mesoscale Discussions in 2016

Mesoscale Discussion 1159

July 6, 20165 states

The Storm Prediction Center issued this mesoscale discussion at Jul 6, 2016, 1:27 AM CDT for 5 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jul 6, 2016, 1:27 AM CDT (06:27 UTC)
Expired
Jul 6, 2016, 3:30 AM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 90 counties

Adair County, IA, Appanoose County, IA, Benton County, IA, Cedar County, IA, Clarke County, IA, Clinton County, IA, Davis County, IA, Des Moines County, IA, Henry County, IA, Iowa County, IA, Jackson County, IA, Jasper County, IA, Jefferson County, IA, Johnson County, IA, Jones County, IA, Keokuk County, IA, Lee County, IA, Linn County, IA, Louisa County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Monroe County, IA, Muscatine County, IA, Polk County, IA, Poweshiek County, IA, Scott County, IA, Story County, IA, Tama County, IA, Van Buren County, IA, Wapello County, IA, Warren County, IA, Washington County, IA, Boone County, IL, Bureau County, IL, Carroll County, IL, Cook County, IL, DeKalb County, IL, DeWitt County, IL, DuPage County, IL, Ford County, IL, Fulton County, IL, Grundy County, IL, Hancock County, IL, Henderson County, IL, Henry County, IL, Iroquois 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, Marshall County, IL, Mason County, IL, McDonough County, IL, McHenry County, IL, McLean County, IL, Mercer County, IL, Ogle County, IL, Peoria County, IL, Putnam County, IL, Rock Island County, IL, Schuyler County, IL, Stark County, IL, Stephenson County, IL, Tazewell County, IL, Warren County, IL, Whiteside County, IL, Will County, IL, Winnebago County, IL, Woodford County, IL, Lake County, IN, Newton County, IN, Clark County, MO, Scotland County, MO, Jefferson County, WI, Kenosha County, WI, Milwaukee County, WI, Ozaukee County, WI, Racine County, WI, Rock County, WI, Sheboygan County, WI, Walworth County, WI, Washington County, WI, Waukesha County, WI

The radar

The Quad Cities radar (KDVN), 16 km from the middle of the area, began a volume at 06:29 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 00:00Z, 6.5 hours before the alert went out and 21 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 00:00Z on 2016-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1788 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 00:00Z on 2016-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 94 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
1788 J/kg
Mixed-layer CIN
-111 J/kg
Mixed-layer LCL
1054 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
94 m²/s²
0-3 km storm-relative helicity
140 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.7

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 5, 8:38 PM CDTMesoscale DiscussionSPCCarroll, Jo Daviess, Stephenson67 min
Jul 5, 9:50 PM CDTSevere Thunderstorm WatchSPCBoone, Carroll, DeKalb, Jo Daviess, Lee, Ogle and 4 more7 hr
Jul 5, 10:46 PM CDTMesoscale DiscussionSPCBoone, Carroll, Jo Daviess, Ogle, Stephenson, Winnebago89 min
Jul 6, 1:55 AM CDTSevere Thunderstorm WatchSPCBureau, Cass, Champaign, Cook, DeWitt, DuPage and 33 more6 hr
Jul 6, 5:04 AM CDTMesoscale DiscussionSPCAdams, Brown, Cass, Champaign, Christian, Clark and 41 more116 min
Jul 6, 10:32 AM CDTMesoscale DiscussionSPCAlexander, Pulaski, Union58 min
Jul 6, 10:48 AM CDTSevere Thunderstorm WatchSPCAlexander, Gallatin, Hardin, Jackson, Johnson, Massac and 5 more5 hr
Jul 6, 12:53 PM CDTMesoscale DiscussionSPCAlexander, Franklin, Gallatin, Hardin, Jackson, Johnson and 6 more67 min
Jul 5, 7:38 PM CDTMesoscale DiscussionSPCClay, Dickinson, Emmet, O'Brien, Osceola, Winnebago97 min
Jul 5, 8:10 PM CDTSevere Thunderstorm WatchSPCHarrison, Monona, Pottawattamie, Shelby5 hr
Jul 5, 10:15 PM CDTMesoscale DiscussionSPCAudubon, Boone, Calhoun, Carroll, Crawford, Franklin and 13 more90 min
Jul 5, 10:35 PM CDTSevere Thunderstorm WatchSPCAdair, Audubon, Boone, Calhoun, Carroll, Cass and 22 more5 hr
Jul 6, 1:50 AM CDTMesoscale DiscussionSPCBarton, Jasper85 min
Jul 6, 2:19 AM CDTSevere Thunderstorm WatchSPCBarton, Bates, Cedar, Christian, Dade, Greene and 7 more7 hr
Jul 6, 5:56 AM CDTMesoscale DiscussionSPCBarton, Christian, Dade, Greene, Jasper, Lawrence and 2 more2 hr
Jul 5, 8:39 PM CDTMesoscale DiscussionSPCFlorence3 hr

Nearby

Mesoscale Discussions in Illinois, 2016Mesoscale Discussions in Iowa, 2016Mesoscale Discussions in Wisconsin, 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.