Alert archive / Mississippi / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 112, NWS Jackson, MS

April 9, 20204 counties in Mississippi

NWS Jackson, MS issued this severe thunderstorm warning at Apr 9, 2020, 4:25 AM CDT for 4 counties in Mississippi. It was in force for 50 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: Apr 9, 2020, 4:25 AM CDT (09:25 UTC)
Expired: Apr 9, 2020, 5:15 AM CDT
In force: 50 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Clay County, MS, Lowndes County, MS, Oktibbeha County, MS, Webster County, MS

The radar

The Columbus AFB radar (KGWX), 62 km from the middle of the area, began a volume at 09:29 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 (KLZK), launched 00:00Z, 9.4 hours before the alert went out and 176 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: 1810 J/kg
Mixed-layer CIN: -112 J/kg
Mixed-layer LCL: 1529 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 113 m²/s²
0-3 km storm-relative helicity: 132 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 8.3

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 Jackson, MS wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 8, 3:32 PM CDT, 12 hours 53 minutes earlier.

Area forecast discussion, Apr 8, 3:32 PM CDT, 12 hours 53 minutes before

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Hazardous weather outlook, Apr 8, 3:44 PM CDT, 12 hours 41 minutes before

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</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.
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        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 Jackson, MS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 9, 4:22 AM CDT	Special Weather Statement	JAN	Clay, Webster	38 min
Apr 9, 4:59 AM CDT	Special Weather Statement	JAN	Oktibbeha	46 min
Apr 9, 5:15 AM CDT	Special Weather Statement	JAN	Noxubee	30 min
Apr 9, 10:10 AM CDT	River Flood Warning	JAN	Franklin	21 days

Nearby

Severe Thunderstorm Warnings in Mississippi, 2020 Every severe thunderstorm warning in 2020

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.