Alert archive / Mississippi / Mesoscale Discussions in 2019

Mesoscale Discussion 601

May 9, 20194 states

The Storm Prediction Center issued this mesoscale discussion at May 9, 2019, 1:34 PM CDT for 4 states. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued
May 9, 2019, 1:34 PM CDT (18:34 UTC)
Expired
May 9, 2019, 3:30 PM CDT
In force
116 min
Issued by
the Storm Prediction Center
All 32 counties

Baldwin County, AL, Choctaw County, AL, Clarke County, AL, Conecuh County, AL, Escambia County, AL, Mobile County, AL, Monroe County, AL, Washington County, AL, Wilcox County, AL, Escambia County, FL, Santa Rosa County, FL, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Livingston Parish, LA, Pointe Coupee Parish, LA, Saint Helena Parish, LA, Saint Tammany Parish, LA, Tangipahoa Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, Forrest County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Jones County, MS, Lamar County, MS, Pearl River County, MS, Perry County, MS, Stone County, MS, Wayne County, MS

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 6.6 hours before the alert went out and 90 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, Slidell Radar S, LA at 12:00Z on 2019-05-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1983 joules per kilogram.LCLEL10008507005003002001001 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, Slidell Radar S, LA at 12:00Z on 2019-05-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 138 square meters per square second.193958Sfc1 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
1983 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
541 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
138 m²/s²
0-3 km storm-relative helicity
273 m²/s²
Significant tornado parameter
1.6
Supercell composite
8.3

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.

IssuedProductOfficeCountiesLasted
May 9, 11:22 AM CDTMesoscale DiscussionSPCChoctaw, Clarke, Greene, Hale, Marengo, Sumter and 2 more113 min
May 9, 11:46 AM CDTTornado WatchSPCChoctaw, Mobile, Washington6 hr
May 9, 12:03 PM CDTMesoscale DiscussionSPCBibb, Blount, Calhoun, Chambers, Cherokee, Chilton and 20 more57 min
May 9, 1:47 PM CDTMesoscale DiscussionSPCCalhoun, Cherokee, Cleburne, DeKalb, Etowah, Jackson88 min
May 9, 3:35 PM CDTMesoscale DiscussionSPCBaldwin, Barbour, Bullock, Butler, Coffee, Conecuh and 10 more115 min
May 8, 7:02 PM CDTMesoscale DiscussionSPCCatahoula, East Carroll, Franklin, Madison, Morehouse, Richland and 2 more58 min
May 8, 10:31 PM CDTMesoscale DiscussionSPCBeauregard, Bienville, Bossier, Caddo, Caldwell, Claiborne and 13 more89 min
May 9, 6:58 AM CDTMesoscale DiscussionSPCCatahoula, Franklin, Grant, LaSalle, Madison, Rapides and 1 more62 min
May 8, 9:28 PM CDTMesoscale DiscussionSPCAttala, Carroll, Copiah, Grenada, Hinds, Holmes and 12 more62 min
May 9, 8:09 AM CDTSevere Thunderstorm WatchSPCAdams, Attala, Claiborne, Clarke, Copiah, Covington and 20 more6 hr

Nearby

Mesoscale Discussions in Mississippi, 2019Mesoscale Discussions in Alabama, 2019Mesoscale Discussions in Louisiana, 2019Every mesoscale discussion in 2019

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.