Alert archive / Oklahoma / Mesoscale Discussions in 2016

Mesoscale Discussion 1274

July 14, 20164 counties in Arkansas; McDonald County, Missouri; 19 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Jul 14, 2016, 11:21 AM CDT for 4 counties in Arkansas; McDonald County, Missouri; 19 counties in Oklahoma. It was in force for 114 min.

The area

The outline as issued.

The facts

Issued: Jul 14, 2016, 11:21 AM CDT (16:21 UTC)
Expired: Jul 14, 2016, 1:15 PM CDT
In force: 114 min
Issued by: the Storm Prediction Center
Chance of a watch: 60%

All 24 counties

Benton County, AR, Crawford County, AR, Sebastian County, AR, Washington County, AR, McDonald County, MO, Adair County, OK, Cherokee County, OK, Craig County, OK, Creek County, OK, Delaware County, OK, Haskell County, OK, LeFlore County, OK, Mayes County, OK, McIntosh County, OK, Muskogee County, OK, Nowata County, OK, Okmulgee County, OK, Osage County, OK, Ottawa County, OK, Rogers County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 25 km from the middle of the area, began a volume at 16:22 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

Springfield, MO (KSGF), launched 12:00Z, 4.4 hours before the alert went out and 162 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: 36 J/kg
Mixed-layer CIN: -347 J/kg
Mixed-layer LCL: 1320 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: -84 m²/s²
0-3 km storm-relative helicity: 223 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 14.7

Open this sounding in Storm Lab

The text

As transmitted.

<!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
Jul 14, 3:10 AM CDT	Mesoscale Discussion	SPC	Howard, Little River, Polk, Sevier	95 min
Jul 14, 11:38 AM CDT	Severe Thunderstorm Watch	SPC	Benton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more	5 hr
Jul 14, 2:14 PM CDT	Mesoscale Discussion	SPC	Clark, Conway, Crawford, Dallas, Franklin, Garland and 20 more	91 min
Jul 14, 3:05 PM CDT	Severe Thunderstorm Watch	SPC	Arkansas, Bradley, Calhoun, Clark, Cleveland, Columbia and 32 more	6 hr
Jul 14, 5:43 PM CDT	Mesoscale Discussion	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 20 more	2 hr
Jul 14, 5:05 PM CDT	Mesoscale Discussion	SPC	Beckham, Caddo, Cimarron, Comanche, Custer, Dewey and 8 more	115 min
Jul 14, 6:25 PM CDT	Severe Thunderstorm Watch	SPC	Beckham, Caddo, Comanche, Cotton, Grady, Greer and 7 more	7 hr

Nearby

Mesoscale Discussions in Oklahoma, 2016 Mesoscale Discussions in Arkansas, 2016 Mesoscale Discussions in Missouri, 2016 Every mesoscale discussion in 2016

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.