Alert archive / Mississippi / Mesoscale Discussions in 2008

Mesoscale Discussion 407

March 14, 200830 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Mar 14, 2008, 10:36 PM CDT for 30 counties in Mississippi. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued: Mar 14, 2008, 10:36 PM CDT (03:36 UTC)
Expired: Mar 15, 2008, 12:00 AM CDT
In force: 84 min
Issued by: the Storm Prediction Center

All 30 counties

Attala County, MS, Calhoun County, MS, Carroll County, MS, Chickasaw County, MS, Choctaw County, MS, Clarke County, MS, Clay County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Jasper County, MS, Kemper County, MS, Lauderdale County, MS, Leake County, MS, Leflore County, MS, Lowndes County, MS, Madison County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Webster County, MS, Winston County, MS, Yalobusha County, MS, Yazoo County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 102 km from the middle of the area, began a volume at 03:37 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 (KLZK), launched 00:00Z, 3.6 hours before the alert went out and 218 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1631 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 167 m²/s²
0-3 km storm-relative helicity: 283 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 14, 7:14 PM CDT	Tornado Watch	SPC	Bolivar, Claiborne, Humphreys, Issaquena, Sharkey, Sunflower and 2 more	7 hr
Mar 14, 9:50 PM CDT	Mesoscale Discussion	SPC	Bolivar, Claiborne, Humphreys, Issaquena, Sharkey, Sunflower and 2 more	55 min
Mar 14, 11:01 PM CDT	Tornado Watch	SPC	Attala, Calhoun, Carroll, Chickasaw, Choctaw, Clarke and 27 more	3 hr
Mar 14, 11:55 PM CDT	Mesoscale Discussion	SPC	Bolivar, Claiborne, Humphreys, Issaquena, Sharkey, Sunflower and 2 more	65 min
Mar 14, 11:55 PM CDT	Severe Thunderstorm Watch	SPC	Alcorn, Benton, Coahoma, DeSoto, Itawamba, Lafayette and 11 more	7 hr
Mar 15, 1:47 AM CDT	Mesoscale Discussion	SPC	Attala, Carroll, Choctaw, Clarke, Clay, Copiah and 25 more	88 min
Mar 15, 2:12 AM CDT	Mesoscale Discussion	SPC	Alcorn, Benton, Coahoma, DeSoto, Lafayette, Lee and 10 more	93 min
Mar 15, 4:30 AM CDT	Mesoscale Discussion	SPC	Alcorn, Benton, Calhoun, Chickasaw, Coahoma, DeSoto and 15 more	90 min
Mar 15, 6:58 AM CDT	Mesoscale Discussion	SPC	Tishomingo	62 min
Mar 15, 10:23 AM CDT	Mesoscale Discussion	SPC	Alcorn, Benton, DeSoto, Lafayette, Marshall, Panola and 6 more	67 min

Nearby

Mesoscale Discussions in Mississippi, 2008 Every mesoscale discussion in 2008

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.