Alert archive / Illinois / Mesoscale Discussions in 2008

Mesoscale Discussion 144

February 4, 20085 states

The Storm Prediction Center issued this mesoscale discussion at Feb 4, 2008, 9:21 PM CST for 5 states. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued
Feb 4, 2008, 9:21 PM CST (03:21 UTC)
Expired
Feb 4, 2008, 10:45 PM CST
In force
84 min
Issued by
the Storm Prediction Center
All 68 counties

Clay County, AR, Fulton County, AR, Greene County, AR, Randolph County, AR, Sharp County, AR, Alexander County, IL, Clinton County, IL, Edwards County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jackson County, IL, Jefferson County, IL, Johnson County, IL, Massac County, IL, Monroe County, IL, Perry County, IL, Pope County, IL, Pulaski County, IL, Randolph County, IL, Saint Clair County, IL, Saline County, IL, Union County, IL, Wabash County, IL, Washington County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Posey County, IN, Vanderburgh County, IN, Ballard County, KY, Caldwell County, KY, Carlisle County, KY, Crittenden County, KY, Fulton County, KY, Graves County, KY, Henderson County, KY, Hickman County, KY, Hopkins County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, Union County, KY, Webster County, KY, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, Dent County, MO, Howell County, MO, Iron County, MO, Madison County, MO, Mississippi County, MO, New Madrid County, MO, Oregon County, MO, Perry County, MO, Reynolds County, MO, Ripley County, MO, Saint Francois County, MO, Sainte Genevieve County, MO, Scott County, MO, Shannon County, MO, Stoddard County, MO, Texas County, MO, Washington County, MO, Wayne County, MO

The radar

The Paducah radar (KPAH), 154 km from the middle of the area, began a volume at 03:21 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

Springfield, MO (KSGF), launched 00:00Z, 3.4 hours before the alert went out and 295 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, Springfield, MO at 00:00Z on 2008-02-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 267 joules per kilogram.LCLEL10008507005003002001001 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, Springfield, MO at 00:00Z on 2008-02-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 166 square meters per square second.1939587897Sfc1 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
267 J/kg
Mixed-layer CIN
-12 J/kg
Mixed-layer LCL
1572 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
166 m²/s²
0-3 km storm-relative helicity
214 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.2

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
Feb 5, 6:39 AM CSTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Clark, Cleburne and 32 more3 hr
Feb 5, 9:47 AM CSTMesoscale DiscussionSPCClay, Craighead, Crittenden, Cross, Greene, Jackson and 5 more88 min
Feb 5, 10:18 AM CSTMesoscale DiscussionSPCBenton, Boone, Carroll, Crawford, Franklin, Johnson and 7 more87 min
Feb 5, 11:16 AM CSTMesoscale DiscussionSPCArkansas, Ashley, Baxter, Bradley, Calhoun, Clark and 53 more89 min
Feb 5, 11:56 AM CSTTornado WatchSPCHoward, Little River, Miller, Sevier7 hr
Feb 5, 12:11 PM CSTMesoscale DiscussionSPCArkansas, Ashley, Chicot, Crittenden, Cross, Desha and 7 more94 min
Feb 5, 12:39 PM CSTTornado WatchSPCBaxter, Benton, Boone, Carroll, Crawford, Franklin and 14 more7 hr
Feb 5, 2:08 PM CSTTornado Watch PDSSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 33 more10 hr
Feb 5, 3:09 PM CSTTornado Watch PDSSPCClay, Craighead, Crittenden, Cross, Greene, Lawrence and 6 more9 hr
Feb 5, 3:17 PM CSTMesoscale DiscussionSPCBaxter, Boone, Carroll, Crawford, Franklin, Johnson and 9 more88 min
Feb 5, 3:36 PM CSTMesoscale DiscussionSPCAshley, Bradley, Calhoun, Clark, Cleburne, Cleveland and 19 more84 min
Feb 5, 5:39 PM CSTMesoscale DiscussionSPCArkansas, Baxter, Bradley, Calhoun, Clark, Clay and 42 more96 min
Feb 4, 6:20 PM CSTMesoscale DiscussionSPCAdams, Bond, Brown, Calhoun, Cass, Clinton and 13 more85 min
Feb 4, 7:14 PM CSTSevere Thunderstorm WatchSPCBond, Calhoun, Cass, Champaign, Christian, Clark and 33 more6 hr
Feb 4, 9:44 PM CSTMesoscale DiscussionSPCCalhoun, Champaign, Christian, DeWitt, Douglas, Ford and 13 more91 min
Feb 5, 6:45 AM CSTMesoscale DiscussionSPCMassac2 hr
Feb 5, 4:46 PM CSTMesoscale DiscussionSPCBond, Christian, Clark, Clay, Clinton, Coles and 17 more119 min
Feb 4, 7:18 PM CSTMesoscale DiscussionSPCAdams, Allen, Benton, Blackford, Carroll, Cass and 23 more117 min
Feb 4, 7:27 PM CSTMesoscale DiscussionSPCAdams, Allen, Benton, Blackford, Carroll, Cass and 23 more2 hr
Feb 4, 7:28 PM CSTMesoscale DiscussionSPCAdams, Allen, Benton, Blackford, Carroll, Cass and 23 more2 hr
Feb 5, 7:07 AM CSTMesoscale DiscussionSPCAndrew, Buchanan, Caldwell, Clay, Clinton, Daviess and 6 more6 hr
Feb 5, 5:26 PM CSTMesoscale DiscussionSPCAndrew, Atchison, Buchanan, Caldwell, Clay, Clinton and 8 more5 hr

Nearby

Mesoscale Discussions in Illinois, 2008Mesoscale Discussions in Missouri, 2008Mesoscale Discussions in Kentucky, 2008Every 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.