Alert archive / Missouri / Mesoscale Discussions in 2004

Mesoscale Discussion 949

May 27, 200417 counties in Illinois; Johnson County, Wyandotte County, Kansas; 59 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at May 27, 2004, 5:01 PM CDT for 17 counties in Illinois; Johnson County, Wyandotte County, Kansas; 59 counties in Missouri. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued
May 27, 2004, 5:01 PM CDT (22:01 UTC)
Expired
May 27, 2004, 6:30 PM CDT
In force
89 min
Issued by
the Storm Prediction Center
All 78 counties

Bond County, IL, Calhoun County, IL, Clinton County, IL, Fayette County, IL, Greene County, IL, Jackson County, IL, Jersey County, IL, Macoupin County, IL, Madison County, IL, Monroe County, IL, Montgomery County, IL, Perry County, IL, Pike County, IL, Randolph County, IL, Saint Clair County, IL, Union County, IL, Washington County, IL, Johnson County, KS, Wyandotte County, KS, Andrew County, MO, Audrain County, MO, Benton County, MO, Boone County, MO, Buchanan County, MO, Caldwell County, MO, Callaway County, MO, Camden County, MO, Cape Girardeau County, MO, Carroll County, MO, Cass County, MO, Chariton County, MO, City of Saint Louis, MO, Clay County, MO, Clinton County, MO, Cole County, MO, Cooper County, MO, Crawford County, MO, Daviess County, MO, DeKalb County, MO, Dent County, MO, Franklin County, MO, Gasconade County, MO, Henry County, MO, Howard County, MO, Iron County, MO, Jackson County, MO, Jefferson County, MO, Johnson County, MO, Laclede County, MO, Lafayette County, MO, Lincoln County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Madison County, MO, Maries County, MO, Miller County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Morgan County, MO, Osage County, MO, Perry County, MO, Pettis County, MO, Phelps County, MO, Pike County, MO, Platte County, MO, Pulaski County, MO, Ralls County, MO, Randolph County, MO, Ray County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Saline County, MO, Warren County, MO, Washington County, MO

The radar

The St Louis radar (KLSX), 48 km from the middle of the area, began a volume at 22:01 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

Lincoln, IL (KILX), launched 12:00Z, 10.0 hours before the alert went out and 288 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, Lincoln, IL at 12:00Z on 2004-05-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 577 joules per kilogram.LCLLFCEL10008507005003002001001 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, Lincoln, IL at 12:00Z on 2004-05-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 119 square meters per square second.1939587897Sfc1 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
577 J/kg
Mixed-layer CIN
-123 J/kg
Mixed-layer LCL
465 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
119 m²/s²
0-3 km storm-relative helicity
147 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.8

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 26, 7:57 PM CDTMesoscale DiscussionSPCAlexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 13 more63 min
May 26, 8:55 PM CDTTornado WatchSPCEdwards, Franklin, Gallatin, Hamilton, Hardin, Jackson and 16 more5 hr
May 26, 9:36 PM CDTMesoscale DiscussionSPCAdams, Bond, Brown, Calhoun, Cass, Christian and 25 more54 min
May 26, 11:14 PM CDTMesoscale DiscussionSPCAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 17 more2 hr
May 27, 1:53 AM CDTMesoscale DiscussionSPCChristian, Clark, Clay, Coles, Crawford, Cumberland and 9 more3 hr
May 27, 11:10 AM CDTMesoscale DiscussionSPCAdams, Brown, Calhoun, Cass, Christian, DeWitt and 25 more2 hr
May 27, 11:55 AM CDTSevere Thunderstorm WatchSPCAdams, Brown, Hancock, Henderson, McDonough, Pike and 3 more6 hr
May 27, 1:07 PM CDTMesoscale DiscussionSPCChampaign, Clark, Coles, DeWitt, Douglas, Edgar and 12 more113 min
May 27, 1:30 PM CDTSevere Thunderstorm WatchSPCCass, Champaign, Christian, Coles, DeWitt, Douglas and 22 more7 hr
May 27, 1:52 PM CDTMesoscale DiscussionSPCAdams, Calhoun, Greene, Jersey, Macoupin, Pike and 1 more113 min
May 27, 2:25 PM CDTSevere Thunderstorm WatchSPCBond, Calhoun, Clinton, Fayette, Franklin, Greene and 12 more7 hr
May 27, 3:12 PM CDTMesoscale DiscussionSPCChampaign, Christian, Clark, Coles, Cumberland, DeWitt and 13 more2 hr
May 27, 3:37 PM CDTMesoscale DiscussionSPCBond, Calhoun, Clay, Clinton, Edwards, Effingham and 22 more113 min
May 27, 4:00 PM CDTSevere Thunderstorm WatchSPCClark, Clay, Crawford, Cumberland, Edwards, Effingham and 7 more4 hr
May 27, 6:00 PM CDTMesoscale DiscussionSPCChampaign, DeWitt, Douglas, Edgar, Macon, Morgan and 4 more90 min
May 26, 8:30 PM CDTTornado WatchSPCAllen, Anderson, Bourbon, Butler, Chautauqua, Coffey and 10 more6 hr
May 26, 11:40 PM CDTSevere Thunderstorm WatchSPCChase, Douglas, Franklin, Geary, Jefferson, Johnson and 9 more5 hr
May 27, 1:16 AM CDTMesoscale DiscussionSPCDouglas, Franklin, Jefferson, Johnson, Leavenworth, Lyon and 5 more119 min
May 27, 3:55 AM CDTMesoscale DiscussionSPCAtchison, Brown, Doniphan, Johnson, Leavenworth, Nemaha and 1 more95 min
May 26, 8:29 PM CDTMesoscale DiscussionSPCMcDonald91 min
May 27, 1:50 AM CDTTornado WatchSPCBarton, Camden, Cedar, Christian, Dade, Dallas and 15 more4 hr
May 27, 3:27 AM CDTMesoscale DiscussionSPCCedar, Christian, Dade, Dallas, Douglas, Greene and 12 more2 hr

Nearby

Mesoscale Discussions in Missouri, 2004Mesoscale Discussions in Illinois, 2004Mesoscale Discussions in Kansas, 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.