Alert archive / Minnesota / Mesoscale Discussions in 2007
Mesoscale Discussion 1996
The Storm Prediction Center issued this mesoscale discussion at Sep 21, 2007, 3:29 AM CDT for 33 counties in Minnesota; 5 counties in North Dakota; 4 counties in South Dakota. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 21, 2007, 3:29 AM CDT (08:29 UTC)
- Expired
- Sep 21, 2007, 5:30 AM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 42 counties
Becker County, MN, Beltrami County, MN, Benton County, MN, Big Stone County, MN, Chippewa County, MN, Clay County, MN, Clearwater County, MN, Douglas County, MN, Grant County, MN, Hubbard County, MN, Isanti County, MN, Kanabec County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, Mahnomen County, MN, Meeker County, MN, Mille Lacs County, MN, Morrison County, MN, Norman County, MN, Otter Tail County, MN, Polk County, MN, Pope County, MN, Red Lake County, MN, Sherburne County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Traverse County, MN, Wadena County, MN, Wilkin County, MN, Wright County, MN, Yellow Medicine County, MN, Cass County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Traill County, ND, Day County, SD, Grant County, SD, Marshall County, SD, Roberts County, SD
The radar
The Fargo/Grand Forks radar (KMVX), 192 km from the middle of the area, began a volume at 08:30 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
Minneapolis, MN (KMPX), launched 00:00Z, 8.5 hours before the alert went out and 221 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
- 1394 J/kg
- Mixed-layer CIN
- -85 J/kg
- Mixed-layer LCL
- 838 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 192 m²/s²
- 0-3 km storm-relative helicity
- 567 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 24.8
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 |
|---|---|---|---|---|
| Sep 20, 8:40 PM CDT | Mesoscale Discussion | SPC | Murray, Nobles, Pipestone, Rock | 95 min |
| Sep 20, 11:13 PM CDT | Severe Thunderstorm Watch | SPC | Aitkin, Carlton, Cass, Cook, Crow Wing, Itasca and 4 more | 7 hr |
| Sep 21, 12:00 AM CDT | Tornado Watch | SPC | Becker, Beltrami, Benton, Big Stone, Chippewa, Clay and 28 more | 6 hr |
| Sep 21, 3:08 AM CDT | Mesoscale Discussion | SPC | Aitkin, Carlton, Cook, Itasca, Koochiching, Lake and 2 more | 2 hr |
| Sep 21, 6:04 AM CDT | Severe Thunderstorm Watch | SPC | Aitkin, Anoka, Benton, Carlton, Carver, Cass and 24 more | 5 hr |
| Sep 21, 1:34 PM CDT | Mesoscale Discussion | SPC | Chisago, Cook, Dakota, Dodge, Fillmore, Freeborn and 10 more | 116 min |
| Sep 21, 3:17 PM CDT | Mesoscale Discussion | SPC | Houston | 88 min |
| Sep 21, 3:53 PM CDT | Severe Thunderstorm Watch | SPC | Houston | 4 hr |
Nearby
Mesoscale Discussions in Minnesota, 2007Mesoscale Discussions in North Dakota, 2007Mesoscale Discussions in South Dakota, 2007Every mesoscale discussion in 2007
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.