Alert archive / Kentucky / Mesoscale Discussions in 2017

Mesoscale Discussion 1262

July 7, 20174 states

The Storm Prediction Center issued this mesoscale discussion at Jul 7, 2017, 6:34 PM EDT for 4 states. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued: Jul 7, 2017, 6:34 PM EDT (22:34 UTC)
Expired: Jul 7, 2017, 8:00 PM EDT
In force: 86 min
Issued by: the Storm Prediction Center

All 62 counties

Clark County, IN, Floyd County, IN, Jackson County, IN, Jefferson County, IN, Jennings County, IN, Lawrence County, IN, Martin County, IN, Monroe County, IN, Orange County, IN, Scott County, IN, Switzerland County, IN, Washington County, IN, Bath County, KY, Bourbon County, KY, Boyd County, KY, Bracken County, KY, Carroll County, KY, Carter County, KY, Clark County, KY, Elliott County, KY, Fayette County, KY, Fleming County, KY, Franklin County, KY, Gallatin County, KY, Grant County, KY, Greenup County, KY, Harrison County, KY, Henry County, KY, Jefferson County, KY, Johnson County, KY, Lawrence County, KY, Lewis County, KY, Martin County, KY, Mason County, KY, Menifee County, KY, Montgomery County, KY, Morgan County, KY, Nicholas County, KY, Oldham County, KY, Owen County, KY, Pendleton County, KY, Robertson County, KY, Rowan County, KY, Scott County, KY, Shelby County, KY, Trimble County, KY, Woodford County, KY, Adams County, OH, Gallia County, OH, Jackson County, OH, Lawrence County, OH, Scioto County, OH, Boone County, WV, Cabell County, WV, Clay County, WV, Jackson County, WV, Kanawha County, WV, Lincoln County, WV, Mason County, WV, Putnam County, WV, Roane County, WV, Wayne County, WV

The radar

The Cincinnati radar (KILN), 93 km from the middle of the area, began a volume at 22:38 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

Cncnati-Daytn, OH (KILN), launched 12:00Z, 10.6 hours before the alert went out and 95 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: 678 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 863 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 171 m²/s²
0-3 km storm-relative helicity: 169 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 3.8

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 7, 8:51 AM EDT	Mesoscale Discussion	SPC	Adams, Allen, Blackford, Boone, Carroll, Cass and 25 more	114 min
Jul 7, 9:46 AM EDT	Severe Thunderstorm Watch	SPC	Adams, Allen, Blackford, Cass, DeKalb, Delaware and 20 more	7 hr
Jul 7, 11:22 AM EDT	Mesoscale Discussion	SPC	Adams, Allen, Blackford, Cass, DeKalb, Delaware and 17 more	53 min
Jul 7, 1:19 PM EDT	Mesoscale Discussion	SPC	Benton, Boone, Carroll, Clay, Clinton, Daviess and 23 more	56 min
Jul 7, 1:45 PM EDT	Severe Thunderstorm Watch	SPC	Bartholomew, Benton, Boone, Brown, Carroll, Clay and 32 more	7 hr
Jul 7, 3:54 PM EDT	Mesoscale Discussion	SPC	Bartholomew, Brown, Clark, Dearborn, Decatur, Fayette and 19 more	96 min
Jul 7, 4:24 PM EDT	Severe Thunderstorm Watch	SPC	Clark, Dearborn, Fayette, Floyd, Franklin, Harrison and 8 more	7 hr
Jul 7, 1:27 PM EDT	Severe Thunderstorm Watch	SPC	Boyd, Carter, Greenup, Lawrence	8 hr
Jul 7, 8:02 AM EDT	Mesoscale Discussion	SPC	Belmont, Carroll, Columbiana, Coshocton, Geauga, Guernsey and 11 more	2 hr
Jul 7, 1:07 PM EDT	Mesoscale Discussion	SPC	Athens, Belmont, Gallia, Guernsey, Jackson, Lawrence and 11 more	53 min
Jul 7, 3:35 PM EDT	Mesoscale Discussion	SPC	Athens, Belmont, Gallia, Meigs, Monroe, Morgan and 3 more	85 min

Nearby

Mesoscale Discussions in Kentucky, 2017 Mesoscale Discussions in Indiana, 2017 Mesoscale Discussions in West Virginia, 2017 Every mesoscale discussion in 2017

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.