Alert archive / Indiana / Mesoscale Discussions in 2009

Mesoscale Discussion 912

June 1, 20094 states

The Storm Prediction Center issued this mesoscale discussion at Jun 1, 2009, 6:34 PM CDT for 4 states. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued: Jun 1, 2009, 6:34 PM CDT (23:34 UTC)
Expired: Jun 1, 2009, 8:00 PM CDT
In force: 86 min
Issued by: the Storm Prediction Center

All 81 counties

Bureau County, IL, DuPage County, IL, Ford County, IL, Grundy County, IL, Iroquois County, IL, Kankakee County, IL, Kendall County, IL, Knox County, IL, LaSalle County, IL, Livingston County, IL, Marshall County, IL, McLean County, IL, Peoria County, IL, Putnam County, IL, Stark County, IL, Tazewell County, IL, Warren County, IL, Will County, IL, Woodford County, IL, Adams County, IN, Allen County, IN, Benton County, IN, Blackford County, IN, Carroll County, IN, Cass County, IN, Clinton County, IN, DeKalb County, IN, Delaware County, IN, Elkhart County, IN, Fulton County, IN, Grant 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, Marshall County, IN, Miami County, IN, Newton County, IN, Noble 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, Wabash County, IN, Warren County, IN, Wells County, IN, White County, IN, Whitley County, IN, Berrien County, MI, Allen County, OH, Auglaize County, OH, Champaign County, OH, Crawford County, OH, Darke County, OH, Defiance County, OH, Delaware County, OH, Hancock County, OH, Hardin County, OH, Henry County, OH, Logan County, OH, Marion County, OH, Mercer County, OH, Miami County, OH, Morrow County, OH, Paulding County, OH, Putnam County, OH, Shelby County, OH, Union County, OH, Van Wert County, OH, Williams County, OH, Wood County, OH, Wyandot County, OH

The radar

The Northern Indiana radar (KIWX), 102 km from the middle of the area, began a volume at 23:35 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, 11.6 hours before the alert went out and 183 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 335 J/kg
Mixed-layer CIN: -222 J/kg
Mixed-layer LCL: 1332 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 197 m²/s²
0-3 km storm-relative helicity: 155 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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.

Issued	Product	Office	Counties	Lasted
Jun 1, 1:31 PM CDT	Mesoscale Discussion	SPC	Bureau, Carroll, Cook, DeKalb, DuPage, Ford and 15 more	59 min
Jun 1, 2:37 PM CDT	Severe Thunderstorm Watch	SPC	Bureau, Champaign, Cook, DeKalb, DeWitt, DuPage and 32 more	7 hr
Jun 1, 5:25 PM CDT	Severe Thunderstorm Watch	SPC	Wayne	5 hr
Jun 1, 4:36 PM CDT	Mesoscale Discussion	SPC	Hillsdale, Lenawee, Monroe	54 min

Nearby

Mesoscale Discussions in Indiana, 2009 Mesoscale Discussions in Ohio, 2009 Mesoscale Discussions in Illinois, 2009 Every mesoscale discussion in 2009

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.