Alert archive / Oklahoma / Mesoscale Discussions in 2024

Mesoscale Discussion 587

May 1, 202432 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at May 1, 2024, 1:02 AM CDT for 32 counties in Oklahoma. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued: May 1, 2024, 1:02 AM CDT (06:02 UTC)
Expired: May 1, 2024, 2:30 AM CDT
In force: 88 min
Issued by: the Storm Prediction Center
Concerning: Severe thunderstorm watch 169

All 32 counties

Alfalfa County, OK, Blaine County, OK, Bryan County, OK, Caddo County, OK, Canadian County, OK, Carter County, OK, Cleveland County, OK, Coal County, OK, Garfield County, OK, Garvin County, OK, Grady County, OK, Grant County, OK, Hughes County, OK, Jefferson County, OK, Johnston County, OK, Kay County, OK, Kingfisher County, OK, Lincoln County, OK, Logan County, OK, Love County, OK, Major County, OK, Marshall County, OK, McClain County, OK, Murray County, OK, Noble County, OK, Oklahoma County, OK, Pawnee County, OK, Payne County, OK, Pontotoc County, OK, Pottawatomie County, OK, Seminole County, OK, Stephens County, OK

The radar

The Norman radar (KTLX), 37 km from the middle of the area, began a volume at 06:06 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 00:00Z, 6.0 hours before the alert went out and 51 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: 2804 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 1037 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 167 m²/s²
0-3 km storm-relative helicity: 255 m²/s²
Significant tornado parameter: 2.1
Supercell composite: 13.2

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
Apr 30, 8:45 PM CDT	Severe Thunderstorm Watch	SPC	Craig, Creek, Mayes, Nowata, Osage, Pawnee and 4 more	3 hr
Apr 30, 9:45 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Garfield, Grant, Kay, Noble, Nowata and 3 more	60 min
Apr 30, 10:27 PM CDT	Tornado Watch	SPC	Cotton, Jefferson, Stephens, Tillman	93 min
Apr 30, 11:40 PM CDT	Mesoscale Discussion	SPC	Cherokee, Delaware, Garfield, Mayes, Noble, Pawnee and 3 more	2 hr
Apr 30, 11:56 PM CDT	Severe Thunderstorm Watch	SPC	Alfalfa, Atoka, Bryan, Canadian, Carter, Cleveland and 29 more	5 hr
May 1, 2:57 PM CDT	Mesoscale Discussion	SPC	Beaver, Ellis, Harmon, Harper, Texas	2 hr
May 1, 3:24 PM CDT	Tornado Watch	SPC	Beaver, Beckham, Ellis, Greer, Harmon, Jackson and 2 more	8 hr
May 1, 6:07 PM CDT	Mesoscale Discussion	SPC	Harmon	83 min

Nearby

Mesoscale Discussions in Oklahoma, 2024 Every mesoscale discussion in 2024

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.