Alert archive / Tennessee / Mesoscale Discussions in 2010

Mesoscale Discussion 2000

October 26, 201013 counties in Alabama; Itawamba County, Monroe County, Tishomingo County, Mississippi; 29 counties in Tennessee

The Storm Prediction Center issued this mesoscale discussion at Oct 26, 2010, 8:54 AM CDT for 13 counties in Alabama; Itawamba County, Monroe County, Tishomingo County, Mississippi; 29 counties in Tennessee. It was in force for 66 min.

The area

The outline as issued.

The facts

Issued
Oct 26, 2010, 8:54 AM CDT (13:54 UTC)
Expired
Oct 26, 2010, 10:00 AM CDT
In force
66 min
Issued by
the Storm Prediction Center
All 45 counties

Colbert County, AL, Cullman County, AL, Franklin County, AL, Jackson County, AL, Lauderdale County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marion County, AL, Marshall County, AL, Morgan County, AL, Walker County, AL, Winston County, AL, Itawamba County, MS, Monroe County, MS, Tishomingo County, MS, Bedford County, TN, Cannon County, TN, Cheatham County, TN, Coffee County, TN, Davidson County, TN, DeKalb County, TN, Dickson County, TN, Franklin County, TN, Giles County, TN, Grundy County, TN, Hickman County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Marion County, TN, Marshall County, TN, Maury County, TN, Moore County, TN, Perry County, TN, Rutherford County, TN, Smith County, TN, Sumner County, TN, Trousdale County, TN, Van Buren County, TN, Warren County, TN, Wayne County, TN, White County, TN, Williamson County, TN, Wilson County, TN

The radar

The Northeast Alabama radar (KHTX), 91 km from the middle of the area, began a volume at 13:58 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 1.9 hours before the alert went out and 120 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-pSkew-T log-p diagram, Nashville Metro, TN at 12:00Z on 2010-10-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 324 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Nashville Metro, TN at 12:00Z on 2010-10-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 403 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
324 J/kg
Mixed-layer CIN
-17 J/kg
Mixed-layer LCL
796 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
403 m²/s²
0-3 km storm-relative helicity
486 m²/s²
Significant tornado parameter
0.8
Supercell composite
3.4

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.

IssuedProductOfficeCountiesLasted
Oct 26, 6:00 AM CDTMesoscale DiscussionSPCColbert, Franklin, Lauderdale, Lawrence, Limestone2 hr
Oct 26, 9:27 AM CDTTornado Watch PDSSPCBlount, Colbert, Cullman, DeKalb, Fayette, Franklin and 12 more11 hr
Oct 26, 11:57 AM CDTMesoscale DiscussionSPCDeKalb, Jackson, Lauderdale, Lawrence, Limestone, Madison and 3 more93 min
Oct 26, 2:59 PM CDTTornado WatchSPCAutauga, Bibb, Blount, Calhoun, Chambers, Cherokee and 25 more5 hr
Oct 26, 3:44 PM CDTMesoscale DiscussionSPCDeKalb, Jackson, Lawrence, Madison, Morgan61 min
Oct 26, 6:32 PM CDTMesoscale DiscussionSPCBibb, Blount, Calhoun, Cherokee, Chilton, Clay and 18 more58 min
Oct 26, 3:38 AM CDTMesoscale DiscussionSPCAlcorn, Benton, DeSoto, Marshall, Tate, Tippah and 2 more2 hr
Oct 26, 4:05 AM CDTTornado WatchSPCAlcorn, Benton, Calhoun, Chickasaw, Coahoma, DeSoto and 16 more8 hr
Oct 26, 10:05 AM CDTMesoscale DiscussionSPCAttala, Carroll, Choctaw, Claiborne, Copiah, Hinds and 20 more115 min
Oct 26, 11:26 AM CDTMesoscale DiscussionSPCAlcorn, Attala, Calhoun, Carroll, Chickasaw, Choctaw and 24 more64 min
Oct 26, 11:42 AM CDTTornado WatchSPCAlcorn, Attala, Calhoun, Carroll, Chickasaw, Choctaw and 35 more7 hr
Oct 26, 3:12 PM CDTMesoscale DiscussionSPCAttala, Choctaw, Claiborne, Clay, Copiah, Hinds and 14 more93 min
Oct 26, 1:16 PM CDTTornado WatchSPCAnderson, Bledsoe, Blount, Bradley, Campbell, Carter and 27 more8 hr

Nearby

Mesoscale Discussions in Tennessee, 2010Mesoscale Discussions in Alabama, 2010Mesoscale Discussions in Mississippi, 2010Every mesoscale discussion in 2010

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.