Alert archive / Illinois / Mesoscale Discussions in 2003

Mesoscale Discussion 2331

August 31, 200319 counties in Illinois; 18 counties in Indiana

The Storm Prediction Center issued this mesoscale discussion at Aug 31, 2003, 7:11 PM CDT for 19 counties in Illinois; 18 counties in Indiana. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: Aug 31, 2003, 7:11 PM CDT (00:11 UTC)
Expired: Aug 31, 2003, 8:45 PM CDT
In force: 94 min
Issued by: the Storm Prediction Center

All 37 counties

Christian County, IL, Clark County, IL, Clay County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, Edgar County, IL, Edwards County, IL, Effingham County, IL, Fayette County, IL, Jasper County, IL, Lawrence County, IL, Marion County, IL, Montgomery County, IL, Moultrie County, IL, Richland County, IL, Shelby County, IL, Wabash County, IL, Wayne County, IL, Brown County, IN, Clay County, IN, Daviess County, IN, Dubois County, IN, Greene County, IN, Jackson County, IN, Johnson County, IN, Knox County, IN, Lawrence County, IN, Martin County, IN, Monroe County, IN, Morgan County, IN, Orange County, IN, Owen County, IN, Pike County, IN, Sullivan County, IN, Vigo County, IN, Washington County, IN

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 0.2 hours before the alert went out and 355 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 607 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 401 m²/s²
0-3 km storm-relative helicity: 424 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
Aug 31, 9:44 PM CDT	Mesoscale Discussion	SPC	Bond, Clark, Clay, Clinton, Crawford, Cumberland and 8 more	2 hr
Sep 1, 1:43 PM CDT	Mesoscale Discussion	SPC	Crawford, Edwards, Franklin, Gallatin, Hamilton, Hardin and 7 more	2 hr
Sep 1, 2:05 PM CDT	Severe Thunderstorm Watch	SPC	Clark, Clay, Crawford, Edwards, Effingham, Hamilton and 6 more	6 hr
Sep 1, 3:38 PM CDT	Mesoscale Discussion	SPC	Crawford, Edwards, Jasper, Lawrence, Richland, Saline and 3 more	97 min

Nearby

Mesoscale Discussions in Illinois, 2003 Mesoscale Discussions in Indiana, 2003 Every mesoscale discussion in 2003

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.