Alert archive / Missouri / Mesoscale Discussions in 2009

Mesoscale Discussion 77

February 9, 200923 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Feb 9, 2009, 10:28 AM CST for 23 counties in Missouri. It was in force for 62 min.

The area

The outline as issued.

The facts

Issued: Feb 9, 2009, 10:28 AM CST (16:28 UTC)
Expired: Feb 9, 2009, 11:30 AM CST
In force: 62 min
Issued by: the Storm Prediction Center

All 23 counties

Andrew County, MO, Benton County, MO, Caldwell County, MO, Carroll County, MO, Christian County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Greene County, MO, Harrison County, MO, Henry County, MO, Hickory County, MO, Johnson County, MO, Lafayette County, MO, Livingston County, MO, Nodaway County, MO, Pettis County, MO, Polk County, MO, Ray County, MO, Saline County, MO, St. Clair County, MO, Worth County, MO

The radar

The Pleasant Hill radar (KEAX), 44 km from the middle of the area, began a volume at 16:27 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

Topeka, KS (KTOP), launched 12:00Z, 4.5 hours before the alert went out and 126 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: 931 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 355 m²/s²
0-3 km storm-relative helicity: 379 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
Feb 9, 8:43 AM CST	Mesoscale Discussion	SPC	Andrew, Atchison, Barry, Barton, Bates, Benton and 42 more	32 min
Feb 9, 8:49 AM CST	Severe Thunderstorm Watch	SPC	Andrew, Barton, Bates, Buchanan, Caldwell, Cass and 19 more	2 hr

Nearby

Mesoscale Discussions in Missouri, 2009 Every mesoscale discussion in 2009

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.