Alert archive / Oklahoma / Mesoscale Discussions in 2015

Mesoscale Discussion 763

May 25, 201532 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at May 25, 2015, 12:22 PM CDT for 32 counties in Oklahoma. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued: May 25, 2015, 12:22 PM CDT (17:22 UTC)
Expired: May 25, 2015, 1:45 PM CDT
In force: 83 min
Issued by: the Storm Prediction Center
Chance of a watch: 80%

All 32 counties

Alfalfa County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Cleveland County, OK, Creek County, OK, Custer County, OK, Dewey County, OK, Garfield County, OK, Grady County, OK, Grant County, OK, Hughes County, OK, Kay County, OK, Kingfisher County, OK, Lincoln County, OK, Logan County, OK, Major County, OK, McClain County, OK, McIntosh County, OK, Noble County, OK, Okfuskee County, OK, Oklahoma County, OK, Okmulgee County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Pottawatomie County, OK, Seminole County, OK, Tulsa County, OK, Washita County, OK, Woods County, OK, Woodward County, OK

The radar

The Norman radar (KTLX), 63 km from the middle of the area, began a volume at 17:24 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

Norman, OK (KOUN), launched 12:00Z, 5.4 hours before the alert went out and 63 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: 1332 J/kg
Mixed-layer CIN: -146 J/kg
Mixed-layer LCL: 937 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 177 m²/s²
0-3 km storm-relative helicity: 168 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 9.5

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
May 24, 7:57 PM CDT	Mesoscale Discussion	SPC	Beaver, Ellis, Texas	93 min
May 24, 8:24 PM CDT	Tornado Watch	SPC	Beaver, Ellis, Harper, Texas, Woodward	5 hr
May 25, 10:13 AM CDT	Mesoscale Discussion	SPC	Atoka, Bryan, Carter, Choctaw, Coal, Comanche and 10 more	2 hr
May 25, 10:54 AM CDT	Tornado Watch	SPC	Atoka, Bryan, Caddo, Canadian, Carter, Cleveland and 21 more	7 hr
May 25, 1:54 PM CDT	Mesoscale Discussion	SPC	Carter, Cleveland, Cotton, Garvin, Grady, Jefferson and 8 more	2 hr
May 25, 2:35 PM CDT	Mesoscale Discussion	SPC	Atoka, Bryan, Choctaw, Coal, Latimer, LeFlore and 2 more	55 min
May 25, 2:52 PM CDT	Tornado Watch	SPC	Adair, Cherokee, Choctaw, Delaware, Haskell, Latimer and 7 more	8 hr
May 25, 5:15 PM CDT	Mesoscale Discussion	SPC	Adair, Haskell, LeFlore, McCurtain, Sequoyah	90 min

Nearby

Mesoscale Discussions in Oklahoma, 2015 Every mesoscale discussion in 2015

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.