Alert archive / Utah / Mesoscale Discussions in 2011

Mesoscale Discussion 1245

June 16, 20114 counties in Colorado; 5 counties in Utah; Albany County, Laramie County, Platte County, Wyoming

The Storm Prediction Center issued this mesoscale discussion at Jun 16, 2011, 12:37 PM MDT for 4 counties in Colorado; 5 counties in Utah; Albany County, Laramie County, Platte County, Wyoming. It was in force for 113 min.

The area

The outline as issued.

The facts

Issued: Jun 16, 2011, 12:37 PM MDT (18:37 UTC)
Expired: Jun 16, 2011, 2:30 PM MDT
In force: 113 min
Issued by: the Storm Prediction Center

Counties Jackson County, CO, Moffat County, CO, Rio Blanco County, CO, Routt County, CO, Carbon County, UT, Emery County, UT, Sanpete County, UT, Sevier County, UT, Uintah County, UT, Albany County, WY, Laramie County, WY, Platte County, WY

The radar

The Grand Junction radar (KGJX), 149 km from the middle of the area, began a volume at 18:37 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 484Jun 16, 1:55 PM MDT

The nearest sounding before it

Grand Junction, CO (KGJT), launched 12:00Z, 6.6 hours before the alert went out and 146 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: 3417 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 46 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 16, 1:34 PM MDT	Mesoscale Discussion	SPC	Weld	56 min
Jun 16, 1:55 PM MDT	Severe Thunderstorm Watch	SPC	Elbert, Larimer, Lincoln, Logan, Morgan, Phillips and 3 more	9 hr
Jun 16, 4:49 PM MDT	Mesoscale Discussion	SPC	Logan, Morgan, Phillips, Sedgwick, Washington, Weld	86 min
Jun 16, 5:18 PM MDT	Mesoscale Discussion	SPC	Kit Carson, Yuma	87 min
Jun 16, 5:34 PM MDT	Severe Thunderstorm Watch	SPC	Cheyenne, Kit Carson, Yuma	7 hr

Nearby

Mesoscale Discussions in Utah, 2011 Mesoscale Discussions in Colorado, 2011 Mesoscale Discussions in Wyoming, 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.