Alert archive / Oklahoma / Mesoscale Discussions in 2003

Mesoscale Discussion 885

May 9, 200323 counties in Oklahoma; 13 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 9, 2003, 5:36 PM CDT for 23 counties in Oklahoma; 13 counties in Texas. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued
May 9, 2003, 5:36 PM CDT (22:36 UTC)
Expired
May 9, 2003, 7:00 PM CDT
In force
84 min
Issued by
the Storm Prediction Center
All 36 counties

Blaine County, OK, Caddo County, OK, Canadian County, OK, Carter County, OK, Cleveland County, OK, Comanche County, OK, Cotton County, OK, Creek County, OK, Garvin County, OK, Grady County, OK, Jefferson County, OK, Kingfisher County, OK, Kiowa County, OK, Lincoln County, OK, Logan County, OK, Love County, OK, McClain County, OK, Murray County, OK, Oklahoma County, OK, Pottawatomie County, OK, Seminole County, OK, Stephens County, OK, Tillman County, OK, Archer County, TX, Baylor County, TX, Clay County, TX, Haskell County, TX, Jack County, TX, Knox County, TX, Montague County, TX, Palo Pinto County, TX, Throckmorton County, TX, Wichita County, TX, Wilbarger County, TX, Wise County, TX, Young County, TX

The radar

The Altus AFB radar (KFDR), 46 km from the middle of the area, began a volume at 22:36 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

Norman, OK (KOUN), launched 12:00Z, 10.6 hours before the alert went out and 166 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-pSkew-T log-p diagram, Norman, OK at 12:00Z on 2003-05-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 9 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 12:00Z on 2003-05-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 65 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
9 J/kg
Mixed-layer CIN
-506 J/kg
Mixed-layer LCL
2120 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
65 m²/s²
0-3 km storm-relative helicity
217 m²/s²
Significant tornado parameter
0.0
Supercell composite
6.5

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.

IssuedProductOfficeCountiesLasted
May 8, 8:30 PM CDTMesoscale DiscussionSPCAlfalfa, Blaine, Caddo, Canadian, Carter, Cleveland and 25 more60 min
May 8, 11:14 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Coal, Garvin, Haskell and 16 more91 min
May 9, 2:52 PM CDTMesoscale DiscussionSPCCaddo, Carter, Cleveland, Comanche, Cotton, Creek and 15 more113 min
May 9, 3:35 PM CDTTornado WatchSPCBlaine, Caddo, Canadian, Carter, Cleveland, Comanche and 18 more5 hr
May 9, 4:45 PM CDTTornado WatchSPCCraig, Delaware, Mayes, Nowata, Osage, Ottawa and 4 more6 hr
May 9, 9:08 AM CDTMesoscale DiscussionSPCBorden, Callahan, Coke, Dickens, Fisher, Foard and 16 more3 hr
May 9, 4:58 PM CDTMesoscale DiscussionSPCCallahan, Coke, Concho, Crockett, Fisher, Glasscock and 11 more32 min
May 9, 5:30 PM CDTSevere Thunderstorm WatchSPCCallahan, Coke, Crockett, Fisher, Irion, Jones and 10 more6 hr

Nearby

Mesoscale Discussions in Oklahoma, 2003Mesoscale Discussions in Texas, 2003Every mesoscale discussion in 2003

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.