Alert archive / Colorado / Mesoscale Discussions in 2011
Mesoscale Discussion 1615
The Storm Prediction Center issued this mesoscale discussion at Jul 14, 2011, 1:14 PM MDT for 4 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 14, 2011, 1:14 PM MDT (19:14 UTC)
- Expired
- Jul 14, 2011, 3:15 PM MDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 25 counties
Adams County, CO, Arapahoe County, CO, Boulder County, CO, Broomfield County, CO, Denver County, CO, Douglas County, CO, Elbert County, CO, Gilpin County, CO, Jefferson County, CO, Kit Carson County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO, Yuma County, CO, Cheyenne County, KS, Chase County, NE, Cheyenne County, NE, Deuel County, NE, Dundy County, NE, Kimball County, NE, Perkins County, NE, Laramie County, WY
The radar
The Denver radar (KFTG), 109 km from the middle of the area, began a volume at 19:13 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
Denver, CO (KDNR), launched 12:00Z, 7.2 hours before the alert went out and 23 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
- 255 J/kg
- Mixed-layer CIN
- -304 J/kg
- Mixed-layer LCL
- 1170 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 38 m²/s²
- 0-3 km storm-relative helicity
- 68 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 |
|---|---|---|---|---|
| Jul 13, 6:46 PM MDT | Mesoscale Discussion | SPC | Cheyenne, Elbert, Kit Carson, Lincoln | 29 min |
| Jul 13, 8:12 PM MDT | Mesoscale Discussion | SPC | Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 8 more | 63 min |
| Jul 14, 2:43 PM MDT | Severe Thunderstorm Watch | SPC | Adams, Arapahoe, Boulder, Broomfield, Cheyenne, Denver and 13 more | 6 hr |
| Jul 14, 4:55 PM MDT | Mesoscale Discussion | SPC | Decatur, Graham, Norton, Phillips, Rawlins, Rooks and 2 more | 35 min |
| Jul 14, 1:56 PM MDT | Severe Thunderstorm Watch | SPC | Sheridan | 9 hr |
Nearby
Mesoscale Discussions in Colorado, 2011Mesoscale Discussions in Nebraska, 2011Mesoscale Discussions in Kansas, 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.