Alert archive / Missouri / Mesoscale Discussions in 2009

Mesoscale Discussion 574

April 26, 200926 counties in Kansas; 29 counties in Missouri; Nemaha County, Pawnee County, Richardson County, Nebraska

The Storm Prediction Center issued this mesoscale discussion at Apr 26, 2009, 2:10 AM CDT for 26 counties in Kansas; 29 counties in Missouri; Nemaha County, Pawnee County, Richardson County, Nebraska. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued
Apr 26, 2009, 2:10 AM CDT (07:10 UTC)
Expired
Apr 26, 2009, 3:45 AM CDT
In force
95 min
Issued by
the Storm Prediction Center
All 58 counties

Anderson County, KS, Atchison County, KS, Brown County, KS, Clay County, KS, Coffey County, KS, Dickinson County, KS, Doniphan County, KS, Douglas County, KS, Franklin County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Johnson County, KS, Leavenworth County, KS, Linn County, KS, Lyon County, KS, Marshall County, KS, Miami County, KS, Morris County, KS, Nemaha County, KS, Osage County, KS, Pottawatomie County, KS, Riley County, KS, Shawnee County, KS, Wabaunsee County, KS, Wyandotte County, KS, Andrew County, MO, Atchison County, MO, Bates County, MO, Buchanan County, MO, Caldwell County, MO, Carroll County, MO, Cass County, MO, Chariton 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, Jackson County, MO, Johnson County, MO, Lafayette County, MO, Linn County, MO, Livingston County, MO, Mercer County, MO, Nodaway County, MO, Platte County, MO, Putnam County, MO, Ray County, MO, Saline County, MO, Sullivan County, MO, Worth County, MO, Nemaha County, NE, Pawnee County, NE, Richardson County, NE

The radar

The Pleasant Hill radar (KEAX), 81 km from the middle of the area, began a volume at 07:12 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

Topeka, KS (KTOP), launched 00:00Z, 7.2 hours before the alert went out and 61 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, Topeka, KS at 00:00Z on 2009-04-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 421 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, Topeka, KS at 00:00Z on 2009-04-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 298 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
421 J/kg
Mixed-layer CIN
-157 J/kg
Mixed-layer LCL
554 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
298 m²/s²
0-3 km storm-relative helicity
389 m²/s²
Significant tornado parameter
0.0
Supercell composite
10.6

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
Apr 25, 7:17 PM CDTMesoscale DiscussionSPCJohnson, Leavenworth, Wyandotte58 min
Apr 25, 9:58 PM CDTMesoscale DiscussionSPCAllen, Anderson, Butler, Chase, Chautauqua, Clay and 40 more92 min
Apr 25, 10:09 PM CDTSevere Thunderstorm WatchSPCAnderson, Atchison, Brown, Clay, Cloud, Coffey and 24 more6 hr
Apr 25, 10:39 PM CDTTornado WatchSPCAllen, Chautauqua, Cowley, Elk, Harper, Labette and 5 more4 hr
Apr 26, 1:28 AM CDTMesoscale DiscussionSPCAllen, Barber, Chautauqua, Cowley, Elk, Greenwood and 7 more92 min
Apr 26, 2:39 AM CDTTornado WatchSPCAllen, Chautauqua, Cowley, Elk, Harper, Labette and 5 more3 hr
Apr 26, 5:47 AM CDTMesoscale DiscussionSPCBarton, Dickinson, Edwards, Ellsworth, Ford, Lincoln and 8 more58 min
Apr 26, 5:58 AM CDTTornado WatchSPCBarton, Chase, Clark, Clay, Comanche, Dickinson and 24 more7 hr
Apr 26, 9:18 AM CDTMesoscale DiscussionSPCCloud, Jewell, Mitchell, Republic, Washington27 min
Apr 26, 10:19 AM CDTMesoscale DiscussionSPCBarber, Butler, Comanche, Cowley, Dickinson, Ellsworth and 14 more56 min
Apr 26, 10:54 AM CDTMesoscale DiscussionSPCAtchison, Barber, Barton, Butler, Chase, Chautauqua and 42 more66 min
Apr 26, 11:07 AM CDTTornado Watch PDSSPCBarber, Barton, Brown, Butler, Chase, Clark and 40 more7 hr
Apr 26, 12:27 PM CDTMesoscale DiscussionSPCBarton, Clark, Clay, Cloud, Edwards, Ellsworth and 12 more2 hr
Apr 26, 2:41 PM CDTMesoscale DiscussionSPCBarber, Brown, Butler, Chase, Clay, Cloud and 29 more3 hr
Apr 26, 5:02 PM CDTTornado WatchSPCAnderson, Atchison, Brown, Coffey, Doniphan, Douglas and 13 more6 hr
Apr 26, 5:44 PM CDTMesoscale DiscussionSPCBarber, Butler, Cowley, Harper, Harvey, Kingman and 5 more61 min
Apr 26, 6:14 PM CDTMesoscale DiscussionSPCAnderson, Atchison, Brown, Chase, Coffey, Doniphan and 16 more61 min
Apr 26, 6:16 PM CDTTornado Watch PDSSPCAllen, Barber, Butler, Chase, Chautauqua, Comanche and 16 more8 hr
Apr 25, 9:23 PM CDTMesoscale DiscussionSPCAdair, Buchanan, Caldwell, Clark, Clay, Clinton and 12 more67 min
Apr 26, 9:34 AM CDTSevere Thunderstorm WatchSPCAtchison6 hr
Apr 26, 12:30 PM CDTMesoscale DiscussionSPCAtchison60 min
Apr 26, 12:48 PM CDTTornado WatchSPCAndrew, Atchison, Gentry, Harrison, Holt, Nodaway and 1 more4 hr

Nearby

Mesoscale Discussions in Missouri, 2009Mesoscale Discussions in Kansas, 2009Mesoscale Discussions in Nebraska, 2009Every mesoscale discussion in 2009

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.