Alert archive / Colorado / Mesoscale Discussions in 2011

Mesoscale Discussion 1185

June 11, 201110 counties in Colorado

The Storm Prediction Center issued this mesoscale discussion at Jun 11, 2011, 3:04 PM MDT for 10 counties in Colorado. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued: Jun 11, 2011, 3:04 PM MDT (21:04 UTC)
Expired: Jun 11, 2011, 4:30 PM MDT
In force: 86 min
Issued by: the Storm Prediction Center

Counties Adams County, CO, Arapahoe County, CO, Elbert County, CO, Kit Carson County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Washington County, CO, Weld County, CO, Yuma County, CO

The radar

The Denver radar (KFTG), 64 km from the middle of the area, began a volume at 21:08 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 464Jun 11, 3:35 PM MDT

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 9.1 hours before the alert went out and 49 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: 155 J/kg
Mixed-layer CIN: -355 J/kg
Mixed-layer LCL: 1833 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 120 m²/s²
0-3 km storm-relative helicity: 76 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
Jun 11, 11:44 AM MDT	Mesoscale Discussion	SPC	Baca, Bent, Crowley, Kiowa, Las Animas, Otero and 2 more	91 min
Jun 11, 12:09 PM MDT	Severe Thunderstorm Watch	SPC	Baca, Bent, Crowley, El Paso, Huerfano, Kiowa and 4 more	7 hr
Jun 11, 3:35 PM MDT	Severe Thunderstorm Watch	SPC	Adams, Arapahoe, Cheyenne, Elbert, Kit Carson, Lincoln and 7 more	6 hr
Jun 11, 4:43 PM MDT	Mesoscale Discussion	SPC	Baca, Bent, Crowley, Kiowa, Las Animas, Otero and 2 more	62 min

Nearby

Mesoscale Discussions in Colorado, 2011 Every mesoscale discussion in 2011

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.