Alert archive / Nebraska / Mesoscale Discussions in 2009

Mesoscale Discussion 241

March 23, 20095 states

The Storm Prediction Center issued this mesoscale discussion at Mar 23, 2009, 3:11 PM CDT for 5 states. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued
Mar 23, 2009, 3:11 PM CDT (20:11 UTC)
Expired
Mar 23, 2009, 4:45 PM CDT
In force
94 min
Issued by
the Storm Prediction Center
All 109 counties

Crawford County, IA, Fremont County, IA, Harrison County, IA, Mills County, IA, Monona County, IA, Plymouth County, IA, Pottawattamie County, IA, Shelby County, IA, Woodbury County, IA, Brown County, KS, Butler County, KS, Chase County, KS, Chautauqua County, KS, Clay County, KS, Cloud County, KS, Cowley County, KS, Dickinson County, KS, Elk County, KS, Geary County, KS, Greenwood County, KS, Harper County, KS, Harvey County, KS, Jackson County, KS, Kingman County, KS, Lyon County, KS, Marion County, KS, Marshall County, KS, McPherson County, KS, Morris County, KS, Nemaha County, KS, Ottawa County, KS, Pottawatomie County, KS, Reno County, KS, Republic County, KS, Rice County, KS, Riley County, KS, Saline County, KS, Sedgwick County, KS, Shawnee County, KS, Sumner County, KS, Wabaunsee County, KS, Washington County, KS, Antelope County, NE, Boone County, NE, Boyd County, NE, Brown County, NE, Burt County, NE, Butler County, NE, Cass County, NE, Cedar County, NE, Clay County, NE, Colfax County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Dodge County, NE, Douglas County, NE, Fillmore County, NE, Gage County, NE, Garfield County, NE, Greeley County, NE, Hamilton County, NE, Holt County, NE, Howard County, NE, Jefferson County, NE, Johnson County, NE, Keya Paha County, NE, Knox 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, Pierce County, NE, Platte County, NE, Polk County, NE, Richardson County, NE, Rock County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Stanton County, NE, Thayer County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE, Wheeler County, NE, York County, NE, Alfalfa County, OK, Garfield County, OK, Grant County, OK, Kay County, OK, Noble County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Bon Homme County, SD, Charles Mix County, SD, Clay County, SD, Gregory County, SD, Hutchinson County, SD, Lincoln County, SD, Turner County, SD, Union County, SD, Yankton County, SD

The radar

The Grand Island radar (KUEX), 54 km from the middle of the area, began a volume at 20:12 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

Omaha, NE (KOAX), launched 12:00Z, 8.2 hours before the alert went out and 156 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 2009-03-23Temperature 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 2009-03-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 504 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1023 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
504 m²/s²
0-3 km storm-relative helicity
539 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

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
Mar 22, 11:28 PM CDTMesoscale DiscussionSPCCerro Gordo, Dickinson, Emmet, Franklin, Hamilton, Hancock and 8 more3 hr
Mar 23, 3:50 PM CDTTornado WatchSPCAdams, Audubon, Cass, Crawford, Fremont, Harrison and 11 more6 hr
Mar 23, 6:04 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Buena Vista, Carroll, Cass and 26 more116 min
Mar 23, 12:39 PM CDTMesoscale DiscussionSPCButler, Chase, Clay, Cloud, Dickinson, Ellsworth and 22 more96 min
Mar 23, 1:03 PM CDTTornado WatchSPCBrown, Butler, Chase, Clay, Cloud, Cowley and 29 more6 hr
Mar 23, 5:08 PM CDTMesoscale DiscussionSPCAllen, Anderson, Atchison, Bourbon, Brown, Butler and 40 more97 min
Mar 23, 6:47 PM CDTTornado WatchSPCAllen, Anderson, Brown, Butler, Chase, Chautauqua and 32 more5 hr
Mar 23, 10:13 AM CDTMesoscale DiscussionSPCAdams, Antelope, Blaine, Boone, Boyd, Brown and 43 more2 hr
Mar 23, 12:16 PM CDTTornado WatchSPCAdams, Antelope, Blaine, Boone, Boyd, Brown and 46 more4 hr
Mar 23, 5:19 PM CDTTornado WatchSPCBlaine, Caddo, Canadian, Cleveland, Comanche, Cotton and 24 more7 hr
Mar 23, 4:59 AM CDTMesoscale DiscussionSPCButte, Custer, Harding, Lawrence6 hr
Mar 23, 12:06 PM CDTMesoscale DiscussionSPCButte, Harding, Lawrence, Meade, Pennington, Perkins5 hr
Mar 23, 6:56 PM CDTMesoscale DiscussionSPCButte, Campbell, Corson, Custer, Dewey, Haakon and 13 more3 hr

Nearby

Mesoscale Discussions in Nebraska, 2009Mesoscale Discussions in Kansas, 2009Mesoscale Discussions in Iowa, 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.