Alert archive / Kentucky / Mesoscale Discussions in 2011

Mesoscale Discussion 1389

June 25, 20117 counties in Illinois; 11 counties in Indiana; 17 counties in Kentucky

The Storm Prediction Center issued this mesoscale discussion at Jun 25, 2011, 10:22 PM CDT for 7 counties in Illinois; 11 counties in Indiana; 17 counties in Kentucky. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued: Jun 25, 2011, 10:22 PM CDT (03:22 UTC)
Expired: Jun 25, 2011, 11:15 PM CDT
In force: 53 min
Issued by: the Storm Prediction Center

All 35 counties

Gallatin County, IL, Hardin County, IL, Pope County, IL, Saline County, IL, Wabash County, IL, White County, IL, Williamson County, IL, Crawford County, IN, Daviess County, IN, Dubois County, IN, Gibson County, IN, Knox County, IN, Perry County, IN, Pike County, IN, Posey County, IN, Spencer County, IN, Vanderburgh County, IN, Warrick County, IN, Breckinridge County, KY, Butler County, KY, Caldwell County, KY, Crittenden County, KY, Daviess County, KY, Grayson County, KY, Hancock County, KY, Henderson County, KY, Hopkins County, KY, Livingston County, KY, Logan County, KY, McLean County, KY, Muhlenberg County, KY, Ohio County, KY, Todd County, KY, Union County, KY, Webster County, KY

The radar

The Evansville,IN radar (KVWX), 63 km from the middle of the area, began a volume at 03:22 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.

Severe Thunderstorm Watch 554Jun 26, 2:00 AM CDT

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 3.4 hours before the alert went out and 201 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: 966 J/kg
Mixed-layer CIN: -47 J/kg
Mixed-layer LCL: 1153 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: -14 m²/s²
0-3 km storm-relative helicity: 201 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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.

Issued	Product	Office	Counties	Lasted
Jun 25, 7:36 PM CDT	Severe Thunderstorm Watch	SPC	Alexander, Bond, Calhoun, Clinton, Edwards, Fayette and 27 more	6 hr
Jun 25, 9:30 PM CDT	Severe Thunderstorm Watch	SPC	Christian, Clay, Crawford, Cumberland, Effingham, Jasper and 4 more	5 hr
Jun 26, 1:21 AM CDT	Mesoscale Discussion	SPC	Alexander, Clinton, Edwards, Franklin, Gallatin, Hamilton and 20 more	84 min
Jun 26, 1:58 AM CDT	Severe Thunderstorm Watch	SPC	Alexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 12 more	4 hr
Jun 26, 4:14 AM CDT	Mesoscale Discussion	SPC	Massac	91 min
Jun 26, 2:24 PM CDT	Severe Thunderstorm Watch	SPC	Monroe, Randolph	5 hr
Jun 26, 6:22 PM CDT	Mesoscale Discussion	SPC	Adams, Brown, Calhoun, Cass, Greene, Hancock and 9 more	83 min

Nearby

Mesoscale Discussions in Kentucky, 2011 Mesoscale Discussions in Indiana, 2011 Mesoscale Discussions in Illinois, 2011 Every mesoscale discussion in 2011

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.