Alert archive / Missouri / Mesoscale Discussions in 2017
Mesoscale Discussion 278
The Storm Prediction Center issued this mesoscale discussion at Mar 9, 2017, 4:45 PM CST for 5 states. It was in force for 90 min.
The area
The outline as issued.
The facts
- Issued
- Mar 9, 2017, 4:45 PM CST (22:45 UTC)
- Expired
- Mar 9, 2017, 6:15 PM CST
- In force
- 90 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 95%
All 26 counties
Clay County, AR, Greene County, AR, Randolph County, AR, Alexander County, IL, Ballard County, KY, Carlisle County, KY, Fulton County, KY, Graves County, KY, Hickman County, KY, Bollinger County, MO, Butler County, MO, Carter County, MO, Dunklin County, MO, Mississippi County, MO, New Madrid County, MO, Pemiscot County, MO, Ripley County, MO, Scott County, MO, Stoddard County, MO, Wayne County, MO, Dyer County, TN, Gibson County, TN, Lake County, TN, Lauderdale County, TN, Obion County, TN, Weakley County, TN
The radar
The Paducah radar (KPAH), 125 km from the middle of the area, began a volume at 22:48 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
Little Rock, AR (KBYH), launched 12:00Z, 10.8 hours before the alert went out and 197 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
- 1482 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 89 m²/s²
- 0-3 km storm-relative helicity
- 148 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 |
|---|---|---|---|---|
| Mar 9, 1:04 PM CST | Mesoscale Discussion | SPC | Benton, Carroll | 86 min |
| Mar 9, 3:52 PM CST | Severe Thunderstorm Watch | SPC | Benton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more | 7 hr |
| Mar 9, 5:36 PM CST | Mesoscale Discussion | SPC | Baxter, Benton, Boone, Carroll, Cleburne, Conway and 20 more | 84 min |
| Mar 9, 5:02 PM CST | Severe Thunderstorm Watch | SPC | Alexander, Johnson, Massac, Pulaski, Union | 5 hr |
| Mar 9, 10:02 AM CST | Mesoscale Discussion | SPC | Barton, Bates, Benton, Camden, Cedar, Dade and 9 more | 88 min |
| Mar 9, 11:10 AM CST | Severe Thunderstorm Watch | SPC | Barry, Barton, Bates, Benton, Camden, Cedar and 30 more | 10 hr |
Nearby
Mesoscale Discussions in Missouri, 2017Mesoscale Discussions in Tennessee, 2017Mesoscale Discussions in Kentucky, 2017Every mesoscale discussion in 2017
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.