Alert archive / Indiana / Mesoscale Discussions in 2007

Mesoscale Discussion 1532

July 18, 20075 states

The Storm Prediction Center issued this mesoscale discussion at Jul 18, 2007, 9:06 PM CDT for 5 states. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued
Jul 18, 2007, 9:06 PM CDT (02:06 UTC)
Expired
Jul 18, 2007, 10:30 PM CDT
In force
84 min
Issued by
the Storm Prediction Center
All 158 counties

Clinton County, IA, Des Moines County, IA, Henry County, IA, Lee County, IA, Louisa County, IA, Scott County, IA, Bureau County, IL, Carroll County, IL, Champaign County, IL, Coles County, IL, Cook County, IL, DeKalb County, IL, DeWitt County, IL, Douglas County, IL, DuPage County, IL, Edgar County, IL, Ford County, IL, Fulton County, IL, Grundy County, IL, Henderson County, IL, Henry County, IL, Iroquois County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, Knox County, IL, LaSalle County, IL, Lee County, IL, Livingston County, IL, Logan County, IL, Macon County, IL, Marshall County, IL, Mason County, IL, McDonough County, IL, McLean County, IL, Menard County, IL, Mercer County, IL, Moultrie County, IL, Ogle County, IL, Peoria County, IL, Piatt County, IL, Putnam County, IL, Rock Island County, IL, Stark County, IL, Tazewell County, IL, Vermilion County, IL, Warren County, IL, Whiteside County, IL, Will 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, Decatur County, IN, DeKalb County, IN, Delaware County, IN, Elkhart County, IN, Fayette County, IN, Fountain County, IN, Franklin 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, Johnson 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, Morgan County, IN, Newton County, IN, Noble County, IN, Parke County, IN, Porter County, IN, Pulaski County, IN, Putnam County, IN, Randolph County, IN, Rush County, IN, Saint Joseph County, IN, Shelby County, IN, Starke County, IN, Steuben County, IN, Tippecanoe County, IN, Tipton County, IN, Union County, IN, Vermillion County, IN, Wabash County, IN, Warren County, IN, Wayne County, IN, Wells County, IN, White County, IN, Whitley County, IN, Berrien County, MI, Branch County, MI, Cass County, MI, Hillsdale County, MI, Lenawee County, MI, Monroe County, MI, Saint Joseph County, MI, Allen County, OH, Auglaize County, OH, Butler County, OH, Champaign County, OH, Clark County, OH, Clinton County, OH, Crawford County, OH, Darke County, OH, Defiance County, OH, Delaware County, OH, Fayette County, OH, Franklin County, OH, Fulton County, OH, Greene County, OH, Hamilton County, OH, Hancock County, OH, Hardin County, OH, Henry County, OH, Highland County, OH, Logan County, OH, Lucas County, OH, Madison County, OH, Marion County, OH, Mercer County, OH, Miami County, OH, Montgomery County, OH, Morrow County, OH, Ottawa County, OH, Paulding County, OH, Pickaway County, OH, Pike County, OH, Preble County, OH, Putnam County, OH, Ross County, OH, Sandusky County, OH, Seneca County, OH, Shelby County, OH, Union County, OH, Van Wert County, OH, Warren County, OH, Williams County, OH, Wood County, OH, Wyandot County, OH

The radar

The Chicago radar (KLOT), 52 km from the middle of the area, began a volume at 02:09 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

Lincoln, IL (KILX), launched 00:00Z, 2.1 hours before the alert went out and 116 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 00:00Z on 2007-07-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3514 joules per kilogram.LCLEL10008507005003002001001 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 00:00Z on 2007-07-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 98 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
3514 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
1072 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
98 m²/s²
0-3 km storm-relative helicity
171 m²/s²
Significant tornado parameter
1.8
Supercell composite
13.8

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
Jul 18, 7:29 PM CDTSevere Thunderstorm WatchSPCCook, DuPage, Ford, Grundy, Iroquois, Kane and 5 more7 hr
Jul 18, 10:23 PM CDTMesoscale DiscussionSPCMercer, Rock Island97 min
Jul 18, 11:07 PM CDTSevere Thunderstorm WatchSPCBureau, Hancock, Henderson, Henry, McDonough, Mercer and 4 more4 hr
Jul 19, 1:27 PM CDTMesoscale DiscussionSPCBond, Calhoun, Clark, Clay, Clinton, Coles and 26 more93 min
Jul 19, 1:42 PM CDTSevere Thunderstorm WatchSPCBond, Calhoun, Clay, Clinton, Crawford, Edwards and 30 more6 hr
Jul 19, 5:38 PM CDTMesoscale DiscussionSPCClinton, Edwards, Franklin, Gallatin, Hamilton, Hardin and 17 more97 min
Jul 19, 11:45 AM CDTMesoscale DiscussionSPCBartholomew, Brown, Clark, Crawford, Daviess, Dearborn and 31 more60 min
Jul 19, 12:07 PM CDTSevere Thunderstorm WatchSPCBartholomew, Brown, Clark, Dearborn, Decatur, Fayette and 13 more8 hr
Jul 18, 8:39 PM CDTSevere Thunderstorm WatchSPCBuena Vista, Cherokee, Ida, Monona, Plymouth, Woodbury7 hr
Jul 18, 10:39 PM CDTSevere Thunderstorm WatchSPCAdair, Audubon, Black Hawk, Boone, Calhoun, Carroll and 23 more5 hr
Jul 19, 1:41 AM CDTMesoscale DiscussionSPCAdair, Audubon, Black Hawk, Boone, Calhoun, Carroll and 23 more94 min
Jul 19, 2:54 PM CDTMesoscale DiscussionSPCJackson, Lenawee, Monroe, Washtenaw, Wayne96 min
Jul 18, 9:59 PM CDTSevere Thunderstorm WatchSPCAllen, Ashland, Ashtabula, Auglaize, Belmont, Carroll and 56 more6 hr
Jul 19, 9:09 AM CDTMesoscale DiscussionSPCGallia, Lawrence, Meigs96 min
Jul 19, 6:15 PM CDTMesoscale DiscussionSPCAllen, Ashland, Ashtabula, Auglaize, Carroll, Champaign and 31 more90 min

Nearby

Mesoscale Discussions in Indiana, 2007Mesoscale Discussions in Illinois, 2007Mesoscale Discussions in Ohio, 2007Every mesoscale discussion in 2007

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.