Alert archive / Mississippi / Wind Chill Advisories in 2018

Wind Chill Advisory 1, NWS Jackson, MS

January 15, 201847 counties in Mississippi; 9 parishes in Louisiana; Ashley County, Chicot County, Arkansas

NWS Jackson, MS issued this wind chill advisory at Jan 15, 2018, 2:45 PM CST for 47 counties in Mississippi; 9 parishes in Louisiana; Ashley County, Chicot County, Arkansas. It took effect at Jan 16, 2018, 6:00 AM CST. It was in force for 30 hr.

The area

The counties it named.

The facts

Issued: Jan 15, 2018, 2:45 PM CST (20:45 UTC)
In effect from: Jan 16, 2018, 6:00 AM CST
Expired: Jan 17, 2018, 12:00 PM CST
In force: 30 hr
Issued by: NWS Jackson, MS

All 58 counties

Ashley County, AR, Chicot County, AR, Catahoula Parish, LA, Concordia Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Richland Parish, LA, Tensas Parish, LA, West Carroll Parish, LA, Adams County, MS, Attala County, MS, Bolivar County, MS, Carroll County, MS, Choctaw County, MS, Claiborne County, MS, Clarke County, MS, Clay County, MS, Copiah County, MS, Covington County, MS, Forrest County, MS, Franklin County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Jasper County, MS, Jefferson County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lamar County, MS, Lauderdale County, MS, Lawrence County, MS, Leake County, MS, Leflore County, MS, Lincoln County, MS, Lowndes County, MS, Madison County, MS, Marion County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Simpson County, MS, Smith County, MS, Sunflower County, MS, Warren County, MS, Washington County, MS, Webster County, MS, Winston County, MS, Yazoo County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 32 km from the middle of the area, began a volume at 20:48 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

Slidell Radar S, LA (KSIL), launched 12:00Z, 8.8 hours before the alert went out and 256 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1986 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 110 m²/s²
0-3 km storm-relative helicity: 190 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 wind chill advisory 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 wind chill advisory went out at Jan 15, 11:37 AM CST, 3 hours 8 minutes earlier.

Area forecast discussion, Jan 15, 11:37 AM CST, 3 hours 8 minutes before

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Hazardous weather outlook, Jan 15, 5:38 AM CST, 9 hours 7 minutes before

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  <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 Jackson, MS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 15, 4:14 AM CST	Winter Storm Watch	JAN	Adams, Attala, Carroll, Choctaw, Claiborne, Clay and 22 more	11 hr
Jan 15, 4:14 AM CST	Winter Storm Warning	JAN	Bolivar, Carroll, Grenada, Holmes, Humphreys, Issaquena and 6 more	35 hr
Jan 15, 2:45 PM CST	Winter Weather Advisory	JAN	Adams, Attala, Carroll, Choctaw, Claiborne, Clarke and 37 more	33 hr
Jan 15, 2:56 PM CST	Hard Freeze Warning	JAN	Adams, Attala, Bolivar, Carroll, Choctaw, Claiborne and 41 more	69 hr

Nearby

Wind Chill Advisories in Mississippi, 2018 Wind Chill Advisories in Louisiana, 2018 Wind Chill Advisories in Arkansas, 2018 Every wind chill advisory 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.