Alert archive / Indiana / Mesoscale Discussions in 2006

Mesoscale Discussion 494

April 13, 20065 states

The Storm Prediction Center issued this mesoscale discussion at Apr 13, 2006, 10:31 PM CDT for 5 states. It was in force for 59 min.

The area

The outline as issued.

The facts

Issued
Apr 13, 2006, 10:31 PM CDT (03:31 UTC)
Expired
Apr 13, 2006, 11:30 PM CDT
In force
59 min
Issued by
the Storm Prediction Center
All 160 counties

Cedar County, IA, Clayton County, IA, Clinton County, IA, Delaware County, IA, Dubuque County, IA, Jackson County, IA, Jones County, IA, Muscatine County, IA, Scott County, IA, Boone County, IL, Bureau County, IL, Carroll County, IL, Champaign County, IL, Cook County, IL, DeKalb County, IL, DeWitt County, IL, Douglas County, IL, DuPage County, IL, Ford County, IL, Fulton County, IL, Grundy County, IL, Henry County, IL, Iroquois County, IL, Jo Daviess 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, Marshall County, IL, Mason County, IL, McHenry County, IL, McLean County, IL, Mercer County, IL, Ogle County, IL, Peoria County, IL, Piatt County, IL, Putnam County, IL, Rock Island County, IL, Stark County, IL, Stephenson County, IL, Tazewell County, IL, Vermilion County, IL, Warren County, IL, Whiteside County, IL, Will County, IL, Winnebago County, IL, Woodford County, IL, Adams County, IN, Allen County, IN, Benton County, IN, Blackford County, IN, Boone County, IN, Carroll County, IN, Cass County, IN, Clinton County, IN, DeKalb County, IN, Delaware County, IN, Elkhart County, IN, Fountain County, IN, Fulton County, IN, Grant County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Howard County, IN, Huntington County, IN, Jasper County, IN, Jay County, IN, Kosciusko County, IN, LaGrange County, IN, Lake County, IN, LaPorte County, IN, Madison County, IN, Marion County, IN, Marshall County, IN, Miami County, IN, Montgomery County, IN, Newton County, IN, Noble County, IN, Parke County, IN, Porter County, IN, Pulaski County, IN, Randolph County, IN, Saint Joseph County, IN, Starke County, IN, Steuben County, IN, Tippecanoe County, IN, Tipton County, IN, Vermillion County, IN, Wabash County, IN, Warren County, IN, Wayne County, IN, Wells County, IN, White County, IN, Whitley County, IN, Allegan County, MI, Barry County, MI, Berrien County, MI, Branch County, MI, Calhoun County, MI, Cass County, MI, Eaton County, MI, Ionia County, MI, Kalamazoo County, MI, Kent County, MI, Mason County, MI, Mecosta County, MI, Montcalm County, MI, Muskegon County, MI, Newaygo County, MI, Oceana County, MI, Ottawa County, MI, Saint Joseph County, MI, Van Buren County, MI, Adams County, WI, Brown County, WI, Calumet County, WI, Columbia County, WI, Crawford County, WI, Dane County, WI, Dodge County, WI, Fond du Lac County, WI, Grant County, WI, Green County, WI, Green Lake County, WI, Iowa County, WI, Jefferson County, WI, Juneau County, WI, Kenosha County, WI, Kewaunee County, WI, Lafayette County, WI, Manitowoc County, WI, Marathon County, WI, Marquette County, WI, Milwaukee County, WI, Monroe County, WI, Outagamie County, WI, Ozaukee County, WI, Portage County, WI, Racine County, WI, Richland County, WI, Rock County, WI, Sauk County, WI, Shawano County, WI, Sheboygan County, WI, Vernon County, WI, Walworth County, WI, Washington County, WI, Waukesha County, WI, Waupaca County, WI, Waushara County, WI, Winnebago County, WI, Wood County, WI

The radar

The Milwaukee radar (KMKX), 42 km from the middle of the area, began a volume at 03:34 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, 3.5 hours before the alert went out and 182 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 2006-04-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 774 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 2006-04-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 122 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
774 J/kg
Mixed-layer CIN
-72 J/kg
Mixed-layer LCL
2028 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
122 m²/s²
0-3 km storm-relative helicity
250 m²/s²
Significant tornado parameter
0.0
Supercell composite
5.6

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 13, 7:58 PM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, DeKalb, DuPage, Ford and 26 more92 min
Apr 13, 8:24 PM CDTSevere Thunderstorm WatchSPCBoone, Bureau, Carroll, Cook, DeKalb, DuPage and 26 more7 hr
Apr 13, 11:30 PM CDTSevere Thunderstorm WatchSPCChampaign, Christian, Clark, Coles, Cumberland, DeWitt and 12 more2 hr
Apr 14, 1:34 AM CDTMesoscale DiscussionSPCBoone, Bureau, Champaign, Christian, Clark, Clay and 39 more86 min
Apr 14, 1:58 AM CDTTornado WatchSPCChampaign, Clark, Clay, Coles, Crawford, Cumberland and 21 more4 hr
Apr 14, 7:20 AM CDTMesoscale DiscussionSPCCass, Fulton, Hancock, Henderson, Knox, McDonough and 5 more115 min
Apr 14, 9:15 AM CDTSevere Thunderstorm WatchSPCCass, Champaign, Christian, Clark, Coles, Crawford and 29 more6 hr
Apr 14, 10:05 AM CDTMesoscale DiscussionSPCBrown, Cass, Champaign, Christian, Clark, Coles and 20 more85 min
Apr 14, 4:48 PM CDTMesoscale DiscussionSPCBrown, Bureau, Cass, Champaign, Christian, Clark and 45 more87 min
Apr 14, 5:19 PM CDTTornado WatchSPCBoone, Bureau, Carroll, Cass, Champaign, Christian and 57 more4 hr
Apr 14, 6:57 PM CDTMesoscale DiscussionSPCCass, Champaign, Coles, DeWitt, Douglas, Edgar and 24 more93 min
Apr 13, 11:00 PM CDTSevere Thunderstorm WatchSPCAdams, Allen, Bartholomew, Blackford, Boone, Brown and 49 more5 hr
Apr 14, 3:14 AM CDTMesoscale DiscussionSPCClark, Crawford, Floyd, Harrison, Jefferson, Ohio and 3 more91 min
Apr 14, 1:46 PM CDTMesoscale DiscussionSPCAdams, Allen, Benton, Blackford, Boone, Carroll and 32 more89 min
Apr 14, 2:03 PM CDTSevere Thunderstorm WatchSPCAdams, Allen, Bartholomew, Blackford, Boone, Brown and 41 more9 hr
Apr 14, 4:54 PM CDTMesoscale DiscussionSPCAdams, Allen, Bartholomew, Blackford, Boone, Brown and 51 more66 min
Apr 14, 6:09 PM CDTTornado WatchSPCBartholomew, Boone, Brown, Carroll, Clay, Clinton and 30 more6 hr
Apr 14, 6:58 PM CDTTornado WatchSPCDearborn, Fayette, Franklin, Ohio, Ripley, Switzerland and 2 more6 hr
Apr 13, 8:06 PM CDTMesoscale DiscussionSPCBarron, Chippewa, Clark, Dunn, Eau Claire, Lincoln and 8 more84 min

Nearby

Mesoscale Discussions in Indiana, 2006Mesoscale Discussions in Illinois, 2006Mesoscale Discussions in Wisconsin, 2006Every mesoscale discussion in 2006

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.