Alert archive / Kansas / Winter Weather Advisories in 2021

Winter Weather Advisory 3, NWS Topeka, KS

January 24, 202117 counties in Kansas

NWS Topeka, KS issued this winter weather advisory at Jan 24, 2021, 3:48 AM CST for 17 counties in Kansas. It took effect at Jan 25, 2021, 3:00 AM CST. It was in force for 25 hr.

The area

The counties it named.

The facts

Issued: Jan 24, 2021, 3:48 AM CST (09:48 UTC)
In effect from: Jan 25, 2021, 3:00 AM CST
Expired: Jan 26, 2021, 3:59 AM CST
In force: 25 hr
Issued by: NWS Topeka, KS

Counties Brown County, KS, Clay County, KS, Cloud County, KS, Dickinson County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Marshall County, KS, Morris County, KS, Nemaha County, KS, Ottawa County, KS, Pottawatomie County, KS, Republic County, KS, Riley County, KS, Shawnee County, KS, Wabaunsee County, KS, Washington County, KS

The radar

The Topeka radar (KTWX), 50 km from the middle of the area, began a volume at 09:46 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

Topeka, KS (KTOP), launched 00:00Z, 9.8 hours before the alert went out and 91 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: 1837 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: 390 m²/s²
0-3 km storm-relative helicity: 477 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 Topeka, KS wrote its last area forecast discussion before this winter weather advisory went out at Jan 23, 11:39 PM CST, 4 hours 9 minutes earlier.

Area forecast discussion, Jan 23, 11:39 PM CST, 4 hours 9 minutes before

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Hazardous weather outlook, Jan 23, 3:09 PM CST, 12 hours 39 minutes before

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In the hours before

Special weather statement, Jan 24, 2:14 AM CST, 1 hour 34 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 Topeka, KS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 24, 3:48 AM CST	Winter Storm Warning	TOP	Brown, Clay, Cloud, Marshall, Nemaha, Ottawa and 2 more	44 hr

Nearby

Winter Weather Advisories in Kansas, 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; radar from the NEXRAD Level II archive.