Alert archive / Missouri / Mesoscale Discussions in 2009

Mesoscale Discussion 828

May 15, 20094 states

The Storm Prediction Center issued this mesoscale discussion at May 15, 2009, 2:03 AM CDT for 4 states. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued
May 15, 2009, 2:03 AM CDT (07:03 UTC)
Expired
May 15, 2009, 3:30 AM CDT
In force
87 min
Issued by
the Storm Prediction Center
All 77 counties

Fremont County, IA, Page County, IA, Ringgold County, IA, Taylor County, IA, Atchison County, KS, Brown County, KS, Clay County, KS, Cloud County, KS, Dickinson County, KS, Doniphan County, KS, Douglas County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Johnson County, KS, Leavenworth County, KS, Marshall County, KS, Mitchell County, KS, Nemaha County, KS, Ottawa County, KS, Pottawatomie County, KS, Republic County, KS, Riley County, KS, Shawnee County, KS, Wabaunsee County, KS, Washington County, KS, Wyandotte 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, Cass County, MO, Chariton County, MO, Clay County, MO, Clinton County, MO, Cooper County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Howard County, MO, Jackson County, MO, Johnson County, MO, Knox County, MO, Lafayette County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Mercer County, MO, Moniteau County, MO, Monroe County, MO, Nodaway County, MO, Pettis County, MO, Platte County, MO, Putnam County, MO, Randolph County, MO, Ray County, MO, Saline County, MO, Shelby County, MO, Sullivan County, MO, Worth County, MO, Gage County, NE, Jefferson County, NE, Johnson County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE, Saline County, NE, Thayer County, NE

The radar

The Pleasant Hill radar (KEAX), 86 km from the middle of the area, began a volume at 07:06 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

Topeka, KS (KTOP), launched 00:00Z, 7.1 hours before the alert went out and 73 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 2009-05-15Temperature 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, Topeka, KS at 00:00Z on 2009-05-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 46 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
2203 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
46 m²/s²
0-3 km storm-relative helicity
102 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
May 15, 7:14 AM CDTMesoscale DiscussionSPCAdams, Fremont, Mills, Montgomery, Page, Ringgold and 1 more91 min
May 15, 7:42 AM CDTSevere Thunderstorm WatchSPCFremont, Mills, Montgomery, Page5 hr
May 15, 11:48 AM CDTMesoscale DiscussionSPCFremont, Page57 min
May 15, 1:17 PM CDTMesoscale DiscussionSPCLyon, Osceola58 min
May 15, 12:50 PM CDTTornado WatchSPCAtchison, Doniphan, Johnson, Leavenworth, Linn, Miami and 1 more7 hr
May 15, 2:44 PM CDTMesoscale DiscussionSPCAnderson, Barber, Butler, Chase, Coffey, Comanche and 24 more31 min
May 15, 3:01 PM CDTMesoscale DiscussionSPCJefferson, Leavenworth, Shawnee, Wyandotte59 min
May 15, 3:02 PM CDTTornado WatchSPCAllen, Anderson, Barber, Butler, Chase, Chautauqua and 29 more7 hr
May 15, 3:43 PM CDTMesoscale DiscussionSPCAtchison, Johnson, Leavenworth, Wyandotte62 min
May 15, 5:31 PM CDTMesoscale DiscussionSPCJohnson, Wyandotte119 min
May 15, 5:52 PM CDTMesoscale DiscussionSPCAnderson, Butler, Chase, Coffey, Cowley, Elk and 8 more53 min
May 15, 6:30 PM CDTSevere Thunderstorm WatchSPCBourbon, Cherokee, Crawford, Linn, Miami6 hr
May 15, 2:39 PM CDTTornado WatchSPCFranklin, Jefferson, Saint Charles, Saint Louis, City of Saint Louis7 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.