Alert archive / Wisconsin / Mesoscale Discussions in 2007

Mesoscale Discussion 1236

June 21, 20079 counties in Illinois; 10 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jun 21, 2007, 12:27 PM CDT for 9 counties in Illinois; 10 counties in Wisconsin. It was in force for 63 min.

The area

The outline as issued.

The facts

Issued: Jun 21, 2007, 12:27 PM CDT (17:27 UTC)
Expired: Jun 21, 2007, 1:30 PM CDT
In force: 63 min
Issued by: the Storm Prediction Center

Counties Boone County, IL, Carroll County, IL, DeKalb County, IL, Jo Daviess County, IL, Kane County, IL, McHenry County, IL, Ogle County, IL, Stephenson County, IL, Winnebago County, IL, Columbia County, WI, Dane County, WI, Dodge County, WI, Green County, WI, Iowa County, WI, Jefferson County, WI, Lafayette County, WI, Rock County, WI, Sauk County, WI, Walworth County, WI

The radar

The Milwaukee radar (KMKX), 77 km from the middle of the area, began a volume at 17:28 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

Davenport, (KDVN), launched 12:00Z, 5.5 hours before the alert went out and 149 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: 683 J/kg
Mixed-layer CIN: -148 J/kg
Mixed-layer LCL: 1072 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 23 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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 21, 9:57 AM CDT	Mesoscale Discussion	SPC	Boone, Bureau, Carroll, Champaign, Cook, DeKalb and 42 more	33 min
Jun 21, 3:25 PM CDT	Mesoscale Discussion	SPC	Jo Daviess	35 min
Jun 21, 3:55 PM CDT	Severe Thunderstorm Watch	SPC	Henderson, Mercer, Rock Island, Warren	3 hr
Jun 21, 5:42 PM CDT	Mesoscale Discussion	SPC	Bureau, Carroll, Fulton, Henderson, Henry, Jo Daviess and 15 more	93 min
Jun 21, 6:47 PM CDT	Severe Thunderstorm Watch	SPC	Carroll, Hancock, Henderson, Henry, Jo Daviess, Knox and 6 more	4 hr
Jun 20, 7:25 PM CDT	Mesoscale Discussion	SPC	Adams, Barron, Buffalo, Chippewa, Clark, Dunn and 18 more	95 min
Jun 21, 11:55 AM CDT	Mesoscale Discussion	SPC	Buffalo, Crawford, Grant, Iowa, Jackson, Juneau and 7 more	50 min
Jun 21, 11:59 AM CDT	Severe Thunderstorm Watch	SPC	Buffalo, Crawford, Grant, La Crosse, Monroe, Richland and 2 more	8 hr
Jun 21, 2:13 PM CDT	Mesoscale Discussion	SPC	Buffalo, Crawford, Grant, La Crosse, Monroe, Pierce and 3 more	62 min

Nearby

Mesoscale Discussions in Wisconsin, 2007 Mesoscale Discussions in Illinois, 2007 Every 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.