Alert archive / Iowa / Mesoscale Discussions in 2005

Mesoscale Discussion 436

March 30, 200513 counties in Iowa; 8 counties in Minnesota; 7 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Mar 30, 2005, 2:00 PM CST for 13 counties in Iowa; 8 counties in Minnesota; 7 counties in Wisconsin. It was in force for 30 min.

The area

The outline as issued.

The facts

Issued: Mar 30, 2005, 2:00 PM CST (20:00 UTC)
Expired: Mar 30, 2005, 2:30 PM CST
In force: 30 min
Issued by: the Storm Prediction Center

All 28 counties

Boone County, IA, Butler County, IA, Cerro Gordo County, IA, Floyd County, IA, Franklin County, IA, Hamilton County, IA, Hardin County, IA, Marshall County, IA, Mitchell County, IA, Polk County, IA, Story County, IA, Worth County, IA, Wright County, IA, Dodge County, MN, Freeborn County, MN, Goodhue County, MN, Mower County, MN, Olmsted County, MN, Steele County, MN, Wabasha County, MN, Winona County, MN, Buffalo County, WI, Eau Claire County, WI, Jackson County, WI, La Crosse County, WI, Monroe County, WI, Pepin County, WI, Trempealeau County, WI

The radar

The La Crosse radar (KARX), 142 km from the middle of the area, began a volume at 20:00 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.

Tornado Watch 106Mar 30, 2:15 PM CST

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 8.0 hours before the alert went out and 244 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: 1316 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 140 m²/s²
0-3 km storm-relative helicity: 316 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

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
Mar 30, 6:03 AM CST	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Boone, Buena Vista, Calhoun and 32 more	117 min
Mar 30, 8:40 AM CST	Severe Thunderstorm Watch	SPC	Adair, Adams, Audubon, Boone, Butler, Calhoun and 38 more	5 hr
Mar 30, 10:46 AM CST	Mesoscale Discussion	SPC	Allamakee, Appanoose, Benton, Black Hawk, Bremer, Buchanan and 29 more	119 min
Mar 30, 10:50 AM CST	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Boone, Calhoun, Carroll and 29 more	85 min
Mar 30, 11:05 AM CST	Tornado Watch	SPC	Allamakee, Appanoose, Benton, Black Hawk, Bremer, Buchanan and 28 more	5 hr
Mar 30, 1:14 PM CST	Mesoscale Discussion	SPC	Boone, Butler, Cerro Gordo, Floyd, Franklin, Hamilton and 7 more	61 min
Mar 30, 1:23 PM CST	Mesoscale Discussion	SPC	Allamakee, Benton, Black Hawk, Bremer, Buchanan, Cedar and 25 more	97 min
Mar 30, 2:15 PM CST	Tornado Watch	SPC	Allamakee, Benton, Black Hawk, Bremer, Buchanan, Butler and 20 more	6 hr
Mar 30, 3:54 PM CST	Mesoscale Discussion	SPC	Allamakee, Clayton, Clinton, Dubuque, Jackson, Winneshiek	66 min

Nearby

Mesoscale Discussions in Iowa, 2005 Mesoscale Discussions in Minnesota, 2005 Mesoscale Discussions in Wisconsin, 2005 Every mesoscale discussion in 2005

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.