Alert archive / Nebraska / Mesoscale Discussions in 2009

Mesoscale Discussion 967

June 7, 2009Logan County, Phillips County, Sedgwick County, Colorado; 14 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jun 7, 2009, 12:35 AM MDT for Logan County, Phillips County, Sedgwick County, Colorado; 14 counties in Nebraska. It was in force for 55 min.

The area

The outline as issued.

The facts

Issued
Jun 7, 2009, 12:35 AM MDT (06:35 UTC)
Expired
Jun 7, 2009, 1:30 AM MDT
In force
55 min
Issued by
the Storm Prediction Center

Counties Logan County, CO, Phillips County, CO, Sedgwick County, CO, Arthur County, NE, Chase County, NE, Cheyenne County, NE, Deuel County, NE, Dundy County, NE, Garden County, NE, Hayes County, NE, Hitchcock County, NE, Keith County, NE, Kimball County, NE, Lincoln County, NE, McPherson County, NE, Morrill County, NE, Perkins County, NE

The radar

The North Platte radar (KLNX), 144 km from the middle of the area, began a volume at 06:38 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 6.6 hours before the alert went out and 103 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, N. Platte/Lee Bi, NE at 00:00Z on 2009-06-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 63 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, N. Platte/Lee Bi, NE at 00:00Z on 2009-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -6 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
63 J/kg
Mixed-layer CIN
-295 J/kg
Mixed-layer LCL
2465 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
-6 m²/s²
0-3 km storm-relative helicity
242 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.2

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
Jun 7, 10:44 AM MDTMesoscale DiscussionSPCAdams, Arapahoe, Boulder, Broomfield, Denver, Gilpin and 4 more61 min
Jun 7, 11:02 AM MDTSevere Thunderstorm WatchSPCAdams, Arapahoe, Boulder, Broomfield, Denver, Douglas and 8 more6 hr
Jun 7, 2:30 PM MDTMesoscale DiscussionSPCAdams, Arapahoe, Broomfield, Denver, Douglas, Elbert and 9 more60 min
Jun 7, 4:31 PM MDTSevere Thunderstorm WatchSPCKit Carson, Yuma5 hr
Jun 6, 8:01 PM MDTSevere Thunderstorm WatchSPCCass, Clay, Fillmore, Gage, Jefferson, Johnson and 8 more6 hr
Jun 6, 8:28 PM MDTMesoscale DiscussionSPCAdams, Arthur, Blaine, Brown, Buffalo, Chase and 32 more92 min
Jun 6, 10:04 PM MDTMesoscale DiscussionSPCCass, Clay, Fillmore, Gage, Jefferson, Johnson and 8 more86 min
Jun 6, 11:44 PM MDTMesoscale DiscussionSPCCass, Douglas, Gage, Johnson, Lancaster, Nemaha and 5 more61 min
Jun 7, 3:45 AM MDTMesoscale DiscussionSPCJohnson, Nemaha, Pawnee, Richardson30 min
Jun 7, 10:16 AM MDTMesoscale DiscussionSPCAntelope, Boyd, Burt, Cedar, Cuming, Dakota and 12 more119 min
Jun 7, 1:31 PM MDTMesoscale DiscussionSPCBanner, Cheyenne, Deuel, Garden, Kimball, Morrill59 min
Jun 7, 1:36 PM MDTMesoscale DiscussionSPCCass, Gage, Johnson, Nemaha, Otoe, Pawnee and 1 more114 min
Jun 7, 2:45 PM MDTTornado WatchSPCCass, Douglas, Gage, Jefferson, Johnson, Lancaster and 7 more7 hr

Nearby

Mesoscale Discussions in Nebraska, 2009Mesoscale Discussions in Colorado, 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.