Alert archive / Montana / Mesoscale Discussions in 2015
Mesoscale Discussion 1072
The Storm Prediction Center issued this mesoscale discussion at Jun 19, 2015, 12:53 PM MDT for 13 counties in Montana; 11 counties in North Dakota. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 19, 2015, 12:53 PM MDT (18:53 UTC)
- Expired
- Jun 19, 2015, 3:00 PM MDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 60%
All 24 counties
Blaine County, MT, Daniels County, MT, Dawson County, MT, Fergus County, MT, Garfield County, MT, McCone County, MT, Petroleum County, MT, Phillips County, MT, Richland County, MT, Roosevelt County, MT, Sheridan County, MT, Valley County, MT, Wibaux County, MT, Billings County, ND, Burke County, ND, Divide County, ND, Dunn County, ND, Golden Valley County, ND, McKenzie County, ND, McLean County, ND, Mercer County, ND, Mountrail County, ND, Ward County, ND, Williams County, ND
The radar
The Glasgow radar (KGGW), 94 km from the middle of the area, began a volume at 18:56 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
Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 6.9 hours before the alert went out and 93 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
- 181 J/kg
- Mixed-layer CIN
- -225 J/kg
- Mixed-layer LCL
- 1086 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 86 m²/s²
- 0-3 km storm-relative helicity
- 85 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 18, 8:10 PM MDT | Mesoscale Discussion | SPC | Big Horn, Carbon, Powder River, Rosebud, Stillwater, Treasure and 1 more | 65 min |
| Jun 18, 11:02 PM MDT | Severe Thunderstorm Watch | SPC | Carter, Powder River | 3 hr |
| Jun 19, 2:01 PM MDT | Severe Thunderstorm Watch | SPC | Daniels, Dawson, Garfield, McCone, Prairie, Richland and 4 more | 9 hr |
| Jun 19, 2:04 PM MDT | Mesoscale Discussion | SPC | Big Horn, Carbon, Carter, Custer, Fallon, Golden Valley and 8 more | 116 min |
| Jun 19, 2:51 PM MDT | Tornado Watch | SPC | Big Horn, Carbon, Carter, Custer, Fallon, Musselshell and 5 more | 7 hr |
| Jun 19, 4:48 PM MDT | Mesoscale Discussion | SPC | Dawson, Fallon, McCone, Prairie, Richland, Roosevelt and 2 more | 57 min |
Nearby
Mesoscale Discussions in Montana, 2015Mesoscale Discussions in North Dakota, 2015Every mesoscale discussion in 2015
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.