Alert archive / Colorado / Mesoscale Discussions in 2011
Mesoscale Discussion 1447
The Storm Prediction Center issued this mesoscale discussion at Jun 30, 2011, 8:51 AM MDT for 16 counties in Colorado; 7 counties in Utah. It was in force for 54 min.
The area
The outline as issued.
The facts
- Issued
- Jun 30, 2011, 8:51 AM MDT (14:51 UTC)
- Expired
- Jun 30, 2011, 9:45 AM MDT
- In force
- 54 min
- Issued by
- the Storm Prediction Center
All 23 counties
Delta County, CO, Dolores County, CO, Eagle County, CO, Garfield County, CO, Gunnison County, CO, Hinsdale County, CO, Mesa County, CO, Mineral County, CO, Moffat County, CO, Montrose County, CO, Ouray County, CO, Pitkin County, CO, Rio Blanco County, CO, Routt County, CO, San Juan County, CO, San Miguel County, CO, Carbon County, UT, Daggett County, UT, Duchesne County, UT, Emery County, UT, Grand County, UT, Uintah County, UT, Wayne County, UT
The radar
The Grand Junction radar (KGJX), 58 km from the middle of the area, began a volume at 14:54 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
Grand Junction, CO (KGJT), launched 12:00Z, 2.9 hours before the alert went out and 33 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.
- Mixed-layer CAPE
- 28 J/kg
- Mixed-layer CIN
- -222 J/kg
- Mixed-layer LCL
- 2557 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 279 m²/s²
- 0-3 km storm-relative helicity
- 248 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 30, 9:06 AM MDT | Severe Thunderstorm Watch | SPC | Delta, Dolores, Eagle, Garfield, Gunnison, La Plata and 10 more | 7 hr |
| Jun 30, 11:57 AM MDT | Mesoscale Discussion | SPC | Adams, Boulder, Broomfield, Chaffee, Clear Creek, Denver and 14 more | 63 min |
| Jun 30, 12:18 PM MDT | Severe Thunderstorm Watch | SPC | Adams, Arapahoe, Boulder, Broomfield, Chaffee, Clear Creek and 17 more | 9 hr |
| Jun 30, 1:49 PM MDT | Mesoscale Discussion | SPC | Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Delta and 25 more | 116 min |
| Jun 30, 4:17 PM MDT | Mesoscale Discussion | SPC | Adams, Arapahoe, Boulder, Broomfield, Chaffee, Clear Creek and 25 more | 118 min |
Nearby
Mesoscale Discussions in Colorado, 2011Mesoscale Discussions in Utah, 2011Every 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.