Alert archive / Mississippi / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 180, NWS Memphis, TN

June 13, 2018Coahoma County, Mississippi

NWS Memphis, TN issued this severe thunderstorm warning at Jun 13, 2018, 9:22 AM CDT for Coahoma County, Mississippi. It was in force for 38 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 13, 2018, 9:22 AM CDT (14:22 UTC)
Expired
Jun 13, 2018, 10:00 AM CDT
In force
38 min
Issued by
NWS Memphis, TN
Area
Storm-based polygon
Hail
1.25 in
Wind
60.0 mph

County Coahoma County, MS

The radar

The Memphis radar (KNQA), 141 km from the middle of the area, began a volume at 14:22 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

Little Rock, AR (KBYH), launched 12:00Z, 2.4 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, Little Rock, AR at 12:00Z on 2018-06-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2218 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, Little Rock, AR at 12:00Z on 2018-06-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 4 square meters per square second.1939Sfc1 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
2218 J/kg
Mixed-layer CIN
-42 J/kg
Mixed-layer LCL
1019 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
4 m²/s²
0-3 km storm-relative helicity
100 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Memphis, TN wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 13, 7:13 AM CDT, 2 hours 9 minutes earlier.

Area forecast discussion, Jun 13, 7:13 AM CDT, 2 hours 9 minutes before
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Hazardous weather outlook, Jun 13, 3:26 AM CDT, 5 hours 56 minutes before
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<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.
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      <p id="message2">
        Please try again in a few minutes.
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      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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In the hours before

Local storm report, Jun 13, 8:24 AM CDT, 58 minutes before
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<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.
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The office that day

Everything else NWS Memphis, TN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 12, 7:00 PM CDTSevere Thunderstorm WarningMEGFayette30 min
Jun 12, 8:29 PM CDTSpecial Weather StatementMEGShelby31 min
Jun 12, 8:47 PM CDTSevere Thunderstorm WarningMEGFayette, Shelby43 min
Jun 13, 9:44 AM CDTAreal Flood AdvisoryMEGBenton, Decatur2 hr
Jun 13, 11:00 AM CDTSpecial Weather StatementMEGHardin45 min
Jun 12, 7:21 PM CDTSpecial Weather StatementMEGMarshall24 min
Jun 12, 7:28 PM CDTSpecial Weather StatementMEGBenton17 min
Jun 12, 7:51 PM CDTSpecial Weather StatementMEGBenton24 min
Jun 12, 9:33 PM CDTSpecial Weather StatementMEGPrentiss, Tishomingo27 min
Jun 12, 9:58 PM CDTSpecial Weather StatementMEGBenton47 min
Jun 12, 11:16 PM CDTSpecial Weather StatementMEGUnion29 min
Jun 12, 11:38 PM CDTSpecial Weather StatementMEGPrentiss37 min
Jun 12, 11:48 PM CDTFlash Flood WarningMEGAlcorn, Benton, Marshall, Prentiss, Tippah3 hr
Jun 12, 11:51 PM CDTSpecial Weather StatementMEGItawamba, Lee39 min
Jun 13, 12:56 AM CDTFlash Flood WarningMEGBenton, Lafayette, Marshall, Tippah, Union2 hr
Jun 13, 8:18 AM CDTAreal Flood AdvisoryMEGUnion117 min
Jun 13, 9:25 AM CDTAreal Flood AdvisoryMEGYalobusha2 hr
Jun 13, 9:39 AM CDTAreal Flood AdvisoryMEGPrentiss2 hr
Jun 13, 2:46 PM CDTSpecial Weather StatementMEGCoahoma29 min
Jun 12, 9:50 PM CDTSevere Thunderstorm WarningMEGMississippi23 min
Jun 12, 10:38 PM CDTAreal Flood AdvisoryMEGMississippi112 min
Jun 13, 3:14 PM CDTSpecial Weather StatementMEGPhillips31 min
Jun 13, 3:45 PM CDTSpecial Weather StatementMEGPhillips30 min

Nearby

Severe Thunderstorm Warnings in Mississippi, 2018Every severe thunderstorm warning in 2018

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.