Alert archive / Iowa / Mesoscale Discussions in 2004

Mesoscale Discussion 874

May 24, 20045 states

The Storm Prediction Center issued this mesoscale discussion at May 24, 2004, 5:26 PM CDT for 5 states. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued
May 24, 2004, 5:26 PM CDT (22:26 UTC)
Expired
May 24, 2004, 7:00 PM CDT
In force
94 min
Issued by
the Storm Prediction Center
All 162 counties

Adair County, IA, Adams County, IA, Appanoose County, IA, Audubon County, IA, Benton County, IA, Black Hawk County, IA, Boone County, IA, Bremer County, IA, Butler County, IA, Carroll County, IA, Cass County, IA, Cerro Gordo County, IA, Clarke County, IA, Crawford County, IA, Dallas County, IA, Davis County, IA, Decatur County, IA, Des Moines County, IA, Emmet County, IA, Floyd County, IA, Franklin County, IA, Fremont County, IA, Greene County, IA, Grundy County, IA, Guthrie County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Harrison County, IA, Henry County, IA, Humboldt County, IA, Iowa County, IA, Jasper County, IA, Jefferson County, IA, Johnson County, IA, Keokuk County, IA, Kossuth County, IA, Lee County, IA, Louisa County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Mills County, IA, Monona County, IA, Monroe County, IA, Montgomery County, IA, Page County, IA, Polk County, IA, Pottawattamie County, IA, Poweshiek County, IA, Ringgold County, IA, Shelby County, IA, Story County, IA, Tama County, IA, Taylor County, IA, Union County, IA, Van Buren County, IA, Wapello County, IA, Warren County, IA, Washington County, IA, Wayne County, IA, Webster County, IA, Winnebago County, IA, Worth County, IA, Wright County, IA, Adams County, IL, Brown County, IL, Hancock County, IL, Henderson County, IL, McDonough County, IL, Pike County, IL, Schuyler County, IL, Scott County, IL, Atchison County, KS, Brown County, KS, Doniphan County, KS, Marshall County, KS, Nemaha County, KS, Republic County, KS, Washington County, KS, Adair County, MO, Andrew County, MO, Atchison County, MO, Audrain County, MO, Boone County, MO, Buchanan County, MO, Caldwell County, MO, Callaway County, MO, Carroll County, MO, Chariton County, MO, Clark County, MO, Clay County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Howard County, MO, Knox County, MO, Lafayette County, MO, Lewis County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Marion County, MO, Mercer County, MO, Monroe County, MO, Montgomery County, MO, Nodaway County, MO, Pike County, MO, Platte County, MO, Putnam County, MO, Ralls County, MO, Randolph County, MO, Ray County, MO, Saline County, MO, Schuyler County, MO, Scotland County, MO, Shelby County, MO, Sullivan County, MO, Worth County, MO, Boone County, NE, Burt County, NE, Butler County, NE, Cass County, NE, Clay County, NE, Colfax County, NE, Cuming County, NE, Dodge County, NE, Douglas County, NE, Fillmore County, NE, Gage County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Howard County, NE, Jefferson County, NE, Johnson County, NE, Lancaster County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Nemaha County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Platte County, NE, Polk County, NE, Richardson County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Stanton County, NE, Thayer County, NE, Washington County, NE, Wheeler County, NE, York County, NE

The radar

The Des Moines radar (KDMX), 77 km from the middle of the area, began a volume at 22:28 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 10.4 hours before the alert went out and 152 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, Omaha, NE at 12:00Z on 2004-05-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Omaha, NE at 12:00Z on 2004-05-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 210 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
731 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
210 m²/s²
0-3 km storm-relative helicity
289 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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
May 23, 8:40 PM CDTMesoscale DiscussionSPCBond, Calhoun, Christian, Clark, Clay, Clinton and 31 more65 min
May 24, 1:54 PM CDTMesoscale DiscussionSPCAlexander, Gallatin, Hardin, Jackson, Johnson, Massac and 5 more96 min
May 24, 5:45 PM CDTTornado WatchSPCAdams, Brown, Calhoun, Hancock, Henderson, McDonough and 3 more5 hr
May 24, 9:30 AM CDTMesoscale DiscussionSPCAdams, Cass, Fremont, Mills, Montgomery, Page and 2 more2 hr
May 24, 10:10 AM CDTSevere Thunderstorm WatchSPCBuena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 6 more6 hr
May 24, 11:30 AM CDTTornado WatchSPCAdair, Adams, Audubon, Boone, Carroll, Cass and 19 more11 hr
May 24, 1:24 PM CDTMesoscale DiscussionSPCBlack Hawk, Bremer, Butler, Calhoun, Cerro Gordo, Chickasaw and 17 more96 min
May 24, 2:08 PM CDTMesoscale DiscussionSPCBuena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 6 more67 min
May 24, 2:35 PM CDTTornado WatchSPCAppanoose, Boone, Butler, Cerro Gordo, Clarke, Dallas and 26 more7 hr
May 24, 2:39 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Boone, Carroll, Cass and 18 more96 min
May 24, 12:37 PM CDTMesoscale DiscussionSPCAnderson, Atchison, Brown, Chase, Clay, Cloud and 26 more83 min
May 24, 1:10 PM CDTTornado WatchSPCAnderson, Atchison, Brown, Chase, Clay, Cloud and 27 more9 hr
May 24, 3:28 PM CDTMesoscale DiscussionSPCAnderson, Atchison, Brown, Chase, Clay, Cloud and 28 more92 min
May 24, 3:57 PM CDTMesoscale DiscussionSPCButler, Cowley, Greenwood, Sedgwick, Sumner93 min
May 24, 4:30 PM CDTTornado WatchSPCAllen, Anderson, Bourbon, Butler, Chautauqua, Cherokee and 16 more6 hr
May 24, 5:40 PM CDTMesoscale DiscussionSPCAllen, Bourbon, Butler, Chautauqua, Cherokee, Cowley and 9 more95 min
May 24, 6:57 PM CDTMesoscale DiscussionSPCAnderson, Atchison, Brown, Chase, Clay, Cloud and 31 more48 min
May 23, 9:54 PM CDTMesoscale DiscussionSPCBarry, Christian, Crawford, Dent, Douglas, Greene and 11 more96 min
May 24, 8:41 AM CDTMesoscale DiscussionSPCBoyd, Knox2 hr

Nearby

Mesoscale Discussions in Iowa, 2004Mesoscale Discussions in Missouri, 2004Mesoscale Discussions in Nebraska, 2004Every mesoscale discussion in 2004

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.