Alert archive / South Dakota / Mesoscale Discussions in 2009
Mesoscale Discussion 338
The Storm Prediction Center issued this mesoscale discussion at Mar 30, 2009, 7:59 PM CDT for 6 counties in Nebraska; Dickey County, Sargent County, North Dakota; 24 counties in South Dakota. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 30, 2009, 7:59 PM CDT (00:59 UTC)
- Expired
- Mar 31, 2009, 12:00 AM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
All 32 counties
Dickey County, ND, Sargent County, ND, Blaine County, NE, Boyd County, NE, Brown County, NE, Cherry County, NE, Keya Paha County, NE, Rock County, NE, Aurora County, SD, Beadle County, SD, Brown County, SD, Brule County, SD, Buffalo County, SD, Charles Mix County, SD, Day County, SD, Edmunds County, SD, Faulk County, SD, Gregory County, SD, Hand County, SD, Hughes County, SD, Hyde County, SD, Jerauld County, SD, Jones County, SD, Lyman County, SD, Marshall County, SD, McPherson County, SD, Mellette County, SD, Potter County, SD, Spink County, SD, Sully County, SD, Todd County, SD, Tripp County, SD
The radar
The Aberdeen radar (KABR), 167 km from the middle of the area, began a volume at 00:58 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 nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 1.0 hours before the alert went out and 111 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
- 710 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 385 m²/s²
- 0-3 km storm-relative helicity
- 548 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 |
|---|---|---|---|---|
| Mar 31, 1:22 AM CDT | Mesoscale Discussion | SPC | Keya Paha | 4 hr |
| Mar 31, 7:02 AM CDT | Mesoscale Discussion | SPC | Richland | 4 hr |
| Mar 31, 1:26 PM CDT | Mesoscale Discussion | SPC | Brookings, Clark, Codington, Deuel, Grant, Hamlin and 12 more | 3 hr |
Nearby
Mesoscale Discussions in South Dakota, 2009Mesoscale Discussions in Nebraska, 2009Mesoscale Discussions in North Dakota, 2009Every mesoscale discussion in 2009
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.