Alert archive / Wyoming / Mesoscale Discussions in 2018
Mesoscale Discussion 1068
The Storm Prediction Center issued this mesoscale discussion at Jul 17, 2018, 2:47 PM MDT for 4 states. It was in force for 118 min.
The area
The outline as issued.
The facts
- Issued
- Jul 17, 2018, 2:47 PM MDT (20:47 UTC)
- Expired
- Jul 17, 2018, 4:45 PM MDT
- In force
- 118 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 60%
All 26 counties
Logan County, CO, Morgan County, CO, Weld County, CO, Banner County, NE, Box Butte County, NE, Cheyenne County, NE, Dawes County, NE, Kimball County, NE, Morrill County, NE, Scotts Bluff County, NE, Sioux County, NE, Custer County, SD, Fall River County, SD, Lawrence County, SD, Albany County, WY, Campbell County, WY, Converse County, WY, Crook County, WY, Goshen County, WY, Johnson County, WY, Laramie County, WY, Natrona County, WY, Niobrara County, WY, Platte County, WY, Sheridan County, WY, Weston County, WY
The radar
The Cheyenne radar (KCYS), 173 km from the middle of the area, began a volume at 20:49 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
Rapid City, SD (KRAP), launched 12:00Z, 8.8 hours before the alert went out and 241 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
- 859 J/kg
- Mixed-layer CIN
- -59 J/kg
- Mixed-layer LCL
- 1217 m above ground
- 0-6 km bulk shear
- 4 kt
- 0-1 km storm-relative helicity
- -31 m²/s²
- 0-3 km storm-relative helicity
- 36 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| Jul 16, 11:36 PM MDT | Mesoscale Discussion | SPC | Logan, Phillips, Sedgwick, Yuma | 114 min |
| Jul 17, 3:09 PM MDT | Severe Thunderstorm Watch | SPC | Cheyenne, Kit Carson, Logan, Morgan, Phillips, Sedgwick and 3 more | 10 hr |
| Jul 17, 5:49 PM MDT | Mesoscale Discussion | SPC | Logan, Morgan, Phillips, Sedgwick, Washington, Weld and 1 more | 116 min |
| Jul 16, 6:23 PM MDT | Mesoscale Discussion | SPC | Arthur, Banner, Box Butte, Dawes, Garden, Grant and 4 more | 2 hr |
Nearby
Mesoscale Discussions in Wyoming, 2018Mesoscale Discussions in Nebraska, 2018Mesoscale Discussions in Colorado, 2018Every mesoscale discussion in 2018
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.