Alert archive / Colorado / Mesoscale Discussions in 2014

Mesoscale Discussion 387

April 23, 20149 counties in Colorado; Cheyenne County, Kansas; Chase County, Deuel County, Dundy County, Nebraska

The Storm Prediction Center issued this mesoscale discussion at Apr 23, 2014, 2:32 PM MDT for 9 counties in Colorado; Cheyenne County, Kansas; Chase County, Deuel County, Dundy County, Nebraska. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Apr 23, 2014, 2:32 PM MDT (20:32 UTC)
Expired: Apr 23, 2014, 5:00 PM MDT
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 5%

Counties Adams County, CO, Arapahoe County, CO, Kit Carson County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Yuma County, CO, Cheyenne County, KS, Chase County, NE, Deuel County, NE, Dundy County, NE

The radar

The Goodland radar (KGLD), 125 km from the middle of the area, began a volume at 20:35 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 12:00Z, 8.5 hours before the alert went out and 210 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1736 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 621 m²/s²
0-3 km storm-relative helicity: 594 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.

Issued	Product	Office	Counties	Lasted
Apr 23, 1:34 PM MDT	Mesoscale Discussion	SPC	Barton, Ellis, Gove, Graham, Jewell, Lane and 11 more	2 hr
Apr 23, 1:37 PM MDT	Mesoscale Discussion	SPC	Clark, Comanche, Edwards, Finney, Ford, Gray and 5 more	113 min
Apr 23, 2:04 PM MDT	Severe Thunderstorm Watch	SPC	Barton, Cloud, Decatur, Ellis, Gove, Graham and 19 more	8 hr
Apr 23, 2:44 PM MDT	Severe Thunderstorm Watch	SPC	Barber, Clark, Comanche, Edwards, Finney, Ford and 9 more	7 hr
Apr 23, 5:16 PM MDT	Mesoscale Discussion	SPC	Barton, Cloud, Decatur, Ellis, Gove, Graham and 18 more	59 min
Apr 23, 5:54 PM MDT	Mesoscale Discussion	SPC	Barber, Clark, Comanche, Edwards, Finney, Ford and 9 more	96 min

Nearby

Mesoscale Discussions in Colorado, 2014 Mesoscale Discussions in Nebraska, 2014 Mesoscale Discussions in Kansas, 2014 Every 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.