Alert archive / Nebraska / Mesoscale Discussions in 2005

Mesoscale Discussion 529

April 9, 2005Phillips County, Sedgwick County, Yuma County, Colorado; 39 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Apr 9, 2005, 6:19 PM MDT for Phillips County, Sedgwick County, Yuma County, Colorado; 39 counties in Nebraska. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Apr 9, 2005, 6:19 PM MDT (00:19 UTC)
Expired
Apr 9, 2005, 8:45 PM MDT
In force
2 hr
Issued by
the Storm Prediction Center
All 42 counties

Phillips County, CO, Sedgwick County, CO, Yuma County, CO, Adams County, NE, Antelope County, NE, Arthur County, NE, Blaine County, NE, Boone County, NE, Buffalo County, NE, Chase County, NE, Custer County, NE, Dawson County, NE, Deuel County, NE, Dundy County, NE, Frontier County, NE, Furnas County, NE, Garfield County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Hayes County, NE, Hitchcock County, NE, Holt County, NE, Howard County, NE, Kearney County, NE, Keith County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Merrick County, NE, Nance County, NE, Perkins County, NE, Phelps County, NE, Red Willow County, NE, Rock County, NE, Sherman County, NE, Thomas County, NE, Valley County, NE, Wheeler County, NE

The radar

The North Platte radar (KLNX), 70 km from the middle of the area, began a volume at 00:18 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.3 hours before the alert went out and 34 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 2005-04-10Temperature 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, N. Platte/Lee Bi, NE at 00:00Z on 2005-04-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -18 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
3224 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
-18 m²/s²
0-3 km storm-relative helicity
97 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
Apr 10, 4:32 AM MDTMesoscale DiscussionSPCAdams, Alamosa, Arapahoe, Boulder, Broomfield, Clear Creek and 19 more6 hr
Apr 9, 7:25 PM MDTSevere Thunderstorm WatchSPCAntelope, Blaine, Boone, Brown, Buffalo, Custer and 24 more7 hr
Apr 9, 10:08 PM MDTMesoscale DiscussionSPCAntelope, Blaine, Boyd, Brown, Buffalo, Custer and 21 more2 hr
Apr 10, 1:33 AM MDTMesoscale DiscussionSPCAntelope, Blaine, Boone, Boyd, Brown, Buffalo and 26 more57 min
Apr 10, 12:07 PM MDTMesoscale DiscussionSPCClay, Fillmore, Gage, Jefferson, Johnson, Nuckolls and 4 more113 min
Apr 10, 12:40 PM MDTSevere Thunderstorm WatchSPCAdams, Buffalo, Clay, Fillmore, Franklin, Furnas and 19 more6 hr
Apr 10, 1:57 PM MDTMesoscale DiscussionSPCBurt, Cass, Cuming, Dakota, Dodge, Douglas and 4 more2 hr
Apr 10, 2:31 PM MDTMesoscale DiscussionSPCAdams, Buffalo, Clay, Fillmore, Franklin, Gage and 19 more89 min
Apr 10, 2:55 PM MDTSevere Thunderstorm WatchSPCBurt, Butler, Cass, Colfax, Cuming, Dakota and 14 more7 hr

Nearby

Mesoscale Discussions in Nebraska, 2005Mesoscale Discussions in Colorado, 2005Every mesoscale discussion in 2005

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.