Alert archive / Nebraska / Mesoscale Discussions in 2018
Mesoscale Discussion 944
The Storm Prediction Center issued this mesoscale discussion at Jun 29, 2018, 4:31 PM MDT for 9 counties in Nebraska; Goshen County, Laramie County, Platte County, Wyoming. It was in force for 89 min.
The area
The outline as issued.
The facts
- Issued
- Jun 29, 2018, 4:31 PM MDT (22:31 UTC)
- Expired
- Jun 29, 2018, 6:00 PM MDT
- In force
- 89 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 60%
Counties Banner County, NE, Box Butte County, NE, Dawes County, NE, Garden County, NE, Kimball County, NE, Morrill County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sioux County, NE, Goshen County, WY, Laramie County, WY, Platte County, WY
The radar
The Cheyenne radar (KCYS), 126 km from the middle of the area, began a volume at 22:33 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 (KDEN), launched 12:00Z, 10.5 hours before the alert went out and 246 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 4754 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- -107 m²/s²
- 0-3 km storm-relative helicity
- -98 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 |
|---|---|---|---|---|
| Jun 29, 5:19 PM MDT | Severe Thunderstorm Watch | SPC | Arthur, Banner, Box Butte, Cherry, Cheyenne, Dawes and 9 more | 8 hr |
| Jun 29, 11:23 AM MDT | Mesoscale Discussion | SPC | Big Horn, Fremont, Hot Springs, Sheridan, Washakie | 97 min |
| Jun 29, 12:30 PM MDT | Mesoscale Discussion | SPC | Big Horn, Campbell, Converse, Crook, Johnson, Natrona and 4 more | 60 min |
| Jun 29, 1:06 PM MDT | Severe Thunderstorm Watch | SPC | Campbell, Converse, Crook, Niobrara, Sheridan, Weston | 9 hr |
| Jun 29, 2:29 PM MDT | Mesoscale Discussion | SPC | Campbell, Converse, Crook, Johnson, Niobrara, Sheridan and 1 more | 91 min |
Nearby
Mesoscale Discussions in Nebraska, 2018Mesoscale Discussions in Wyoming, 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.