Alert archive / Illinois / Mesoscale Discussions in 2014

Mesoscale Discussion 536

May 9, 201436 counties in Illinois; 24 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at May 9, 2014, 11:46 AM CDT for 36 counties in Illinois; 24 counties in Missouri. It was in force for 59 min.

The area

The outline as issued.

The facts

Issued: May 9, 2014, 11:46 AM CDT (16:46 UTC)
Expired: May 9, 2014, 12:45 PM CDT
In force: 59 min
Issued by: the Storm Prediction Center
Chance of a watch: 80%

All 60 counties

Bond County, IL, Christian County, IL, Clark County, IL, Clay County, IL, Clinton County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, Douglas County, IL, Edgar County, IL, Effingham County, IL, Fayette County, IL, Franklin County, IL, Hamilton County, IL, Jackson County, IL, Jasper County, IL, Jefferson County, IL, Jersey County, IL, Macon County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Monroe County, IL, Montgomery County, IL, Moultrie County, IL, Perry County, IL, Piatt County, IL, Randolph County, IL, Richland County, IL, Saint Clair County, IL, Sangamon County, IL, Shelby County, IL, Union County, IL, Washington County, IL, Wayne County, IL, Williamson County, IL, Bollinger County, MO, Cape Girardeau County, MO, Carter County, MO, City of Saint Louis, MO, Crawford County, MO, Dent County, MO, Douglas County, MO, Franklin County, MO, Howell County, MO, Iron County, MO, Jefferson County, MO, Madison County, MO, Oregon County, MO, Perry County, MO, Phelps County, MO, Reynolds County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Shannon County, MO, Texas County, MO, Washington County, MO, Wayne County, MO

The radar

The St Louis radar (KLSX), 64 km from the middle of the area, began a volume at 16:49 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.

Severe Thunderstorm Watch 135May 9, 12:50 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
May 9, 12:50 PM CDT	Severe Thunderstorm Watch	SPC	Alexander, Bond, Clark, Clay, Clinton, Coles and 37 more	7 hr
May 9, 2:35 PM CDT	Mesoscale Discussion	SPC	Alexander, Clark, Clay, Clinton, Coles, Crawford and 30 more	115 min
May 9, 6:25 PM CDT	Mesoscale Discussion	SPC	Alexander, Bond, Clark, Clinton, Coles, Crawford and 24 more	65 min
May 8, 9:29 PM CDT	Mesoscale Discussion	SPC	Andrew, Bates, Buchanan, Caldwell, Cass, Clay and 11 more	61 min

Nearby

Mesoscale Discussions in Illinois, 2014 Mesoscale Discussions in Missouri, 2014 Every mesoscale discussion in 2014

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.