Alert archive / Colorado / Mesoscale Discussions in 2023

Mesoscale Discussion 973

June 11, 202319 counties in Colorado; Cimarron County, Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Jun 11, 2023, 12:44 PM MDT for 19 counties in Colorado; Cimarron County, Oklahoma. It was in force for 61 min.

The area

The outline as issued.

The facts

Issued: Jun 11, 2023, 12:44 PM MDT (18:44 UTC)
Expired: Jun 11, 2023, 1:45 PM MDT
In force: 61 min
Issued by: the Storm Prediction Center
Concerning: Severe potential...watch likely
Chance of a watch: 80%

Counties Adams County, CO, Arapahoe County, CO, Baca County, CO, Bent County, CO, Broomfield County, CO, Crowley County, CO, Custer County, CO, Denver County, CO, Douglas County, CO, El Paso County, CO, Elbert County, CO, Fremont County, CO, Huerfano County, CO, Jefferson County, CO, Las Animas County, CO, Lincoln County, CO, Otero County, CO, Pueblo County, CO, Teller County, CO, Cimarron County, OK

The radar

The Pueblo radar (KPUX), 95 km from the middle of the area, began a volume at 18:46 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.

Severe Thunderstorm Watch 267Jun 11, 2:15 PM MDT

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 6.7 hours before the alert went out and 328 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: 481 J/kg
Mixed-layer CIN: -233 J/kg
Mixed-layer LCL: 1173 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 254 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.9

Open this sounding in Storm Lab

The text

As transmitted.

<!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
Jun 11, 2:18 PM MDT	Severe Thunderstorm Watch	SPC	Adams, Arapahoe, Baca, Bent, Crowley, Denver and 8 more	7 hr
Jun 11, 4:06 PM MDT	Mesoscale Discussion	SPC	Baca, Bent, Las Animas, Otero, Prowers	84 min

Nearby

Mesoscale Discussions in Colorado, 2023 Mesoscale Discussions in Oklahoma, 2023 Every mesoscale discussion in 2023

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.