Alert archive / Minnesota / Winter Weather Advisories in 2023

Winter Weather Advisory 9, NWS Twin Cities, MN

February 20, 202311 counties in Minnesota; Barron County, Polk County, Rusk County, Wisconsin

NWS Twin Cities, MN issued this winter weather advisory at Feb 20, 2023, 8:55 PM CST for 11 counties in Minnesota; Barron County, Polk County, Rusk County, Wisconsin. It took effect at Feb 21, 2023, 12:00 PM CST. It was in force for 30 hr.

The area

The counties it named.

The facts

Issued: Feb 20, 2023, 8:55 PM CST (02:55 UTC)
In effect from: Feb 21, 2023, 12:00 PM CST
Expired: Feb 22, 2023, 6:00 PM CST
In force: 30 hr
Issued by: NWS Twin Cities, MN

Counties Benton County, MN, Chisago County, MN, Douglas County, MN, Faribault County, MN, Freeborn County, MN, Isanti County, MN, Kanabec County, MN, Martin County, MN, Mille Lacs County, MN, Morrison County, MN, Todd County, MN, Barron County, WI, Polk County, WI, Rusk County, WI

The radar

The Minneapolis radar (KMPX), 49 km from the middle of the area, began a volume at 02:56 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

Minneapolis, MN (KMPX), launched 00:00Z, 2.9 hours before the alert went out and 49 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: 933 m above ground
0-6 km bulk shear: 72 kt
0-1 km storm-relative helicity: 100 m²/s²
0-3 km storm-relative helicity: 153 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 Twin Cities, MN wrote its last area forecast discussion before this winter weather advisory went out at Feb 20, 5:55 PM CST, 3 hours earlier.

Area forecast discussion, Feb 20, 5:55 PM CST, 3 hours before

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Hazardous weather outlook, Feb 20, 2:44 PM CST, 6 hours 11 minutes before

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In the hours before

Special weather statement, Feb 20, 6:11 PM CST, 2 hours 44 minutes before

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  <link rel="stylesheet" href="index.css">
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<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.
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        Please try again in a few minutes.
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The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 21, 3:27 AM CST	Blizzard Warning	MPX	Blue Earth, Brown, Carver, Chippewa, Douglas, Faribault and 22 more	57 hr

Nearby

Winter Weather Advisories in Minnesota, 2023 Winter Weather Advisories in Wisconsin, 2023 Every winter weather advisory in 2023

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.