Alert archive / Nebraska / Mesoscale Discussions in 2014

Mesoscale Discussion 1696

September 9, 20144 states

The Storm Prediction Center issued this mesoscale discussion at Sep 9, 2014, 3:06 PM CDT for 4 states. It was in force for 114 min.

The area

The outline as issued.

The facts

Issued
Sep 9, 2014, 3:06 PM CDT (20:06 UTC)
Expired
Sep 9, 2014, 5:00 PM CDT
In force
114 min
Issued by
the Storm Prediction Center
Chance of a watch
80%
All 49 counties

Adams County, IA, Decatur County, IA, Fremont County, IA, Mills County, IA, Montgomery County, IA, Page County, IA, Ringgold County, IA, Taylor County, IA, Union County, IA, Brown County, KS, Doniphan County, KS, Jewell County, KS, Marshall County, KS, Nemaha County, KS, Republic County, KS, Smith County, KS, Washington County, KS, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Caldwell County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Mercer County, MO, Nodaway County, MO, Worth County, MO, Cass County, NE, Clay County, NE, Fillmore County, NE, Franklin County, NE, Gage County, NE, Jefferson County, NE, Johnson County, NE, Lancaster County, NE, Nemaha County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE, Saline County, NE, Sarpy County, NE, Seward County, NE, Thayer County, NE, Webster County, NE

The radar

The Omaha radar (KOAX), 115 km from the middle of the area, began a volume at 20:07 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, 8.1 hours before the alert went out and 115 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 2014-09-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1246 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, Omaha, NE at 12:00Z on 2014-09-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 71 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
1246 J/kg
Mixed-layer CIN
-266 J/kg
Mixed-layer LCL
1436 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
71 m²/s²
0-3 km storm-relative helicity
96 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
Sep 9, 12:13 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Cass, Clarke, Decatur and 11 more62 min
Sep 9, 3:34 PM CDTTornado WatchSPCAdair, Adams, Appanoose, Audubon, Cass, Clarke and 17 more8 hr
Sep 9, 5:06 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Cass, Fremont, Guthrie and 9 more54 min
Sep 9, 6:45 PM CDTMesoscale DiscussionSPCAppanoose, Decatur, Fremont, Monroe, Page, Ringgold and 2 more90 min
Sep 9, 3:36 PM CDTMesoscale DiscussionSPCCheyenne, Decatur, Rawlins, Sherman, Thomas114 min
Sep 9, 4:05 PM CDTSevere Thunderstorm WatchSPCCheyenne, Decatur, Ellis, Gove, Graham, Logan and 7 more7 hr
Sep 9, 5:26 PM CDTMesoscale DiscussionSPCBarton, Clay, Dickinson, Edwards, Ellsworth, Finney and 23 more94 min
Sep 9, 6:17 PM CDTMesoscale DiscussionSPCCheyenne, Decatur, Ellis, Gove, Graham, Logan and 9 more88 min
Sep 9, 9:44 AM CDTMesoscale DiscussionSPCCity of Saint Louis2 hr
Sep 9, 1:25 PM CDTMesoscale DiscussionSPCBenton, Boone, Callaway, Camden, Carter, Christian and 40 more2 hr
Sep 9, 5:02 PM CDTMesoscale DiscussionSPCAudrain, Jefferson, Lincoln, Monroe, Montgomery, Pike and 5 more88 min

Nearby

Mesoscale Discussions in Nebraska, 2014Mesoscale Discussions in Missouri, 2014Mesoscale Discussions in Iowa, 2014Every mesoscale discussion in 2014

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.