Alert archive / Mississippi / Special Weather Statements in 2017

Special Weather Statement, NWS Jackson, MS

August 15, 2017Rankin County, Simpson County, Mississippi

NWS Jackson, MS issued this special weather statement at Aug 15, 2017, 4:28 PM CDT for Rankin County, Simpson County, Mississippi. It was in force for 62 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 15, 2017, 4:28 PM CDT (21:28 UTC)
Expired: Aug 15, 2017, 5:30 PM CDT
In force: 62 min
Issued by: NWS Jackson, MS

Counties Rankin County, MS, Simpson County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 32 km from the middle of the area, began a volume at 21:30 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, 9.5 hours before the alert went out and 314 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: 1709 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 516 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 106 m²/s²
0-3 km storm-relative helicity: 104 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 4.3

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 14, 6:46 PM CDT, 21 hours 42 minutes earlier.

Area forecast discussion, Aug 14, 6:46 PM CDT, 21 hours 42 minutes before

<!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.
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    </section>
  </main>
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</body>
</html>

The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 14, 7:15 PM CDT	Special Weather Statement	JAN	Lincoln	30 min
Aug 15, 2:27 PM CDT	Special Weather Statement	JAN	Lamar	33 min
Aug 15, 3:32 PM CDT	Special Weather Statement	JAN	Lawrence	43 min
Aug 15, 4:19 PM CDT	Special Weather Statement	JAN	Lawrence	26 min
Aug 15, 4:58 PM CDT	Special Weather Statement	JAN	Adams	47 min
Aug 15, 5:10 PM CDT	Special Weather Statement	JAN	Issaquena	50 min
Aug 15, 5:36 PM CDT	Special Weather Statement	JAN	Rankin	39 min

Nearby

Special Weather Statements in Mississippi, 2017 Every special weather statement in 2017

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.