Alert archive / Wisconsin / Mesoscale Discussions in 2003

Mesoscale Discussion 1669

July 7, 20034 states

The Storm Prediction Center issued this mesoscale discussion at Jul 7, 2003, 4:22 AM CDT for 4 states. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued
Jul 7, 2003, 4:22 AM CDT (09:22 UTC)
Expired
Jul 7, 2003, 5:45 AM CDT
In force
83 min
Issued by
the Storm Prediction Center
All 32 counties

Allamakee County, IA, Black Hawk County, IA, Bremer County, IA, Buchanan County, IA, Chickasaw County, IA, Clayton County, IA, Delaware County, IA, Dubuque County, IA, Fayette County, IA, Howard County, IA, Winneshiek County, IA, Jo Daviess County, IL, Stephenson County, IL, Fillmore County, MN, Houston County, MN, Olmsted County, MN, Winona County, MN, Adams County, WI, Columbia County, WI, Crawford County, WI, Dane County, WI, Grant County, WI, Green County, WI, Iowa County, WI, Juneau County, WI, La Crosse County, WI, Lafayette County, WI, Marquette County, WI, Monroe County, WI, Richland County, WI, Sauk County, WI, Vernon County, WI

The radar

The La Crosse radar (KARX), 92 km from the middle of the area, began a volume at 09:25 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 00:00Z, 9.4 hours before the alert went out and 162 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-pSkew-T log-p diagram, Davenport, at 00:00Z on 2003-07-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2676 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Davenport, at 00:00Z on 2003-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 77 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
2676 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
1259 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
77 m²/s²
0-3 km storm-relative helicity
157 m²/s²
Significant tornado parameter
0.0
Supercell composite
5.9

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.

IssuedProductOfficeCountiesLasted
Jul 6, 8:46 PM CDTMesoscale DiscussionSPCBoone, Cook, DeKalb, DuPage, Ford, Grundy and 10 more59 min
Jul 7, 1:25 AM CDTMesoscale DiscussionSPCJo Daviess, Stephenson, Winnebago95 min
Jul 7, 2:40 AM CDTSevere Thunderstorm WatchSPCJo Daviess4 hr
Jul 7, 6:23 AM CDTMesoscale DiscussionSPCBureau, Carroll, DeKalb, Grundy, Henry, Kendall and 9 more97 min
Jul 7, 8:30 AM CDTMesoscale DiscussionSPCChampaign, DeWitt, Douglas, Ford, Grundy, Iroquois and 13 more60 min
Jul 7, 8:45 AM CDTSevere Thunderstorm WatchSPCChampaign, Cook, DeWitt, Ford, Grundy, Iroquois and 6 more4 hr
Jul 7, 10:14 AM CDTMesoscale DiscussionSPCChampaign, DeWitt, Ford, Iroquois, McLean, Piatt and 1 more61 min
Jul 7, 12:14 PM CDTMesoscale DiscussionSPCBond, Brown, Cass, Champaign, Christian, Clark and 42 more61 min
Jul 7, 2:35 PM CDTMesoscale DiscussionSPCBoone, Jo Daviess, McHenry, Stephenson, Winnebago115 min
Jul 7, 3:35 PM CDTSevere Thunderstorm WatchSPCRock Island5 hr
Jul 7, 4:34 PM CDTMesoscale DiscussionSPCIroquois, Kankakee, Vermilion, Will56 min
Jul 6, 7:45 PM CDTTornado WatchSPCClay, Dickinson, Lyon, O'Brien, Osceola, Sioux6 hr
Jul 6, 8:57 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Boone, Buena Vista, Calhoun and 35 more3 hr
Jul 6, 9:20 PM CDTTornado WatchSPCAdair, Adams, Appanoose, Audubon, Boone, Buena Vista and 62 more6 hr
Jul 6, 11:06 PM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Audubon, Boone, Buena Vista and 62 more114 min
Jul 7, 3:30 PM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Audubon, Benton, Cass and 31 more3 hr
Jul 6, 8:05 PM CDTTornado WatchSPCAitkin, Carlton, Cass, Cook, Crow Wing, Itasca and 6 more6 hr
Jul 6, 10:31 PM CDTMesoscale DiscussionSPCAitkin, Carlton, Cook, Crow Wing, Kanabec, Morrison and 2 more119 min
Jul 7, 2:56 AM CDTMesoscale DiscussionSPCAnoka, Benton, Carver, Chisago, Dakota, Hennepin and 9 more2 hr
Jul 7, 12:54 PM CDTMesoscale DiscussionSPCAdams, Brown, Calumet, Columbia, Dane, Dodge and 21 more66 min

Nearby

Mesoscale Discussions in Wisconsin, 2003Mesoscale Discussions in Iowa, 2003Mesoscale Discussions in Minnesota, 2003Every 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; radar from the NEXRAD Level II archive.