Alert archive / Louisiana / Winter Weather Advisories in 2021

Winter Weather Advisory 3, NWS New Orleans, LA

February 17, 2021East Feliciana Parish, Pointe Coupee Parish, West Feliciana Parish, Louisiana; Amite County, Pike County, Wilkinson County, Mississippi

NWS New Orleans, LA issued this winter weather advisory at Feb 17, 2021, 12:03 PM CST for East Feliciana Parish, Pointe Coupee Parish, West Feliciana Parish, Louisiana; Amite County, Pike County, Wilkinson County, Mississippi. It was in force for 57 min.

The area

The counties it named.

The facts

Issued: Feb 17, 2021, 12:03 PM CST (18:03 UTC)
Expired: Feb 17, 2021, 1:00 PM CST
In force: 57 min
Issued by: NWS New Orleans, LA

Counties East Feliciana Parish, LA, Pointe Coupee Parish, LA, West Feliciana Parish, LA, Amite County, MS, Pike County, MS, Wilkinson County, MS

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 6.1 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1328 m above ground
0-6 km bulk shear: 92 kt
0-1 km storm-relative helicity: 182 m²/s²
0-3 km storm-relative helicity: 249 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 winter weather advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS New Orleans, LA wrote its last area forecast discussion before this winter weather advisory went out at Feb 17, 10:11 AM CST, 1 hour 52 minutes earlier.

Area forecast discussion, Feb 17, 10:11 AM CST, 1 hour 52 minutes before

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In the hours before

Special weather statement, Feb 17, 6:13 AM CST, 5 hours 50 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 New Orleans, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 16, 6:21 PM CST	Freeze Warning	LIX	Assumption, Saint Bernard, Saint James, Saint John the Baptist	14 hr
Feb 16, 6:21 PM CST	Hard Freeze Warning	LIX	East Baton Rouge, East Feliciana, Iberville, Pointe Coupee, Saint Helena, Tangipahoa and 3 more	14 hr
Feb 16, 10:02 PM CST	Winter Weather Advisory	LIX	Assumption, East Baton Rouge, East Feliciana, Iberville, Pointe Coupee, Saint Bernard and 7 more	14 hr
Feb 17, 2:29 PM CST	Winter Weather Advisory	LIX	East Feliciana, Pointe Coupee, West Feliciana	9 hr

Nearby

Winter Weather Advisories in Louisiana, 2021 Winter Weather Advisories in Mississippi, 2021 Every winter weather advisory in 2021

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.