Alert archive / Illinois / Mesoscale Discussions in 2010

Mesoscale Discussion 424

April 30, 201019 counties in Illinois; 19 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Apr 30, 2010, 2:08 PM CDT for 19 counties in Illinois; 19 counties in Missouri. It was in force for 67 min.

The area

The outline as issued.

The facts

Issued: Apr 30, 2010, 2:08 PM CDT (19:08 UTC)
Expired: Apr 30, 2010, 3:15 PM CDT
In force: 67 min
Issued by: the Storm Prediction Center

All 38 counties

Adams County, IL, Brown County, IL, Calhoun County, IL, Cass County, IL, Fulton County, IL, Greene County, IL, Hancock County, IL, Jersey County, IL, Logan County, IL, Macoupin County, IL, Madison County, IL, Mason County, IL, Menard County, IL, Morgan County, IL, Pike County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Tazewell County, IL, Audrain County, MO, Callaway County, MO, City of Saint Louis, MO, Cole County, MO, Crawford County, MO, Franklin County, MO, Gasconade County, MO, Jefferson County, MO, Lincoln County, MO, Maries County, MO, Marion County, MO, Montgomery County, MO, Osage County, MO, Pike County, MO, Ralls County, MO, Saint Charles County, MO, Saint Louis County, MO, Warren County, MO, Washington County, MO

The radar

The St Louis radar (KLSX), 52 km from the middle of the area, began a volume at 19:11 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.

Tornado Watch 115Apr 30, 2:40 PM CDT

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
Apr 30, 9:18 AM CDT	Mesoscale Discussion	SPC	Adams, Hancock, Henderson, Mercer, Rock Island	57 min
Apr 30, 12:41 PM CDT	Mesoscale Discussion	SPC	Boone, Bureau, Carroll, DeKalb, Grundy, Jo Daviess and 9 more	64 min
Apr 30, 1:05 PM CDT	Tornado Watch	SPC	Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 28 more	9 hr
Apr 30, 2:40 PM CDT	Tornado Watch	SPC	Adams, Bond, Brown, Calhoun, Cass, Christian and 29 more	6 hr
Apr 30, 2:41 PM CDT	Mesoscale Discussion	SPC	Boone, Bureau, Carroll, DeKalb, Henderson, Henry and 17 more	64 min
Apr 30, 5:37 PM CDT	Mesoscale Discussion	SPC	Boone, Bureau, Carroll, DeKalb, Henry, Jo Daviess and 16 more	53 min
Apr 29, 7:12 PM CDT	Mesoscale Discussion	SPC	Atchison, Holt	63 min
Apr 29, 11:04 PM CDT	Mesoscale Discussion	SPC	Atchison, Holt	26 min
Apr 29, 11:46 PM CDT	Severe Thunderstorm Watch	SPC	Andrew, Atchison, Buchanan, Holt, Nodaway	4 hr
Apr 30, 2:12 AM CDT	Mesoscale Discussion	SPC	Andrew, Buchanan, Holt, Nodaway	93 min
Apr 30, 10:20 AM CDT	Severe Thunderstorm Watch	SPC	Adair, Audrain, Benton, Boone, Caldwell, Callaway and 36 more	5 hr
Apr 30, 1:11 PM CDT	Mesoscale Discussion	SPC	Barry, Camden, Christian, Dade, Dallas, Douglas and 12 more	2 hr
Apr 30, 1:22 PM CDT	Mesoscale Discussion	SPC	Adair, Bates, Benton, Boone, Caldwell, Carroll and 25 more	53 min
Apr 30, 1:46 PM CDT	Tornado Watch	SPC	Barry, Christian, Dallas, Dent, Douglas, Greene and 14 more	5 hr
Apr 30, 5:53 PM CDT	Mesoscale Discussion	SPC	Butler, Carter, Douglas, Howell, Oregon, Ozark and 6 more	37 min
Apr 30, 6:24 PM CDT	Tornado Watch	SPC	Butler, Carter, Dent, Douglas, Howell, Oregon and 5 more	3 hr

Nearby

Mesoscale Discussions in Illinois, 2010 Mesoscale Discussions in Missouri, 2010 Every 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; radar from the NEXRAD Level II archive.