Alert archive / Minnesota / Winter Storm Warnings in 2018

Winter Storm Warning 7, NWS Duluth, MN

February 23, 20189 counties in Minnesota; 8 counties in Wisconsin

NWS Duluth, MN issued this winter storm warning at Feb 23, 2018, 2:05 PM CST for 9 counties in Minnesota; 8 counties in Wisconsin. It took effect at Feb 24, 2018, 6:00 PM CST. It was in force for 15 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Feb 23, 2018, 2:05 PM CST (20:05 UTC)
In effect from: Feb 24, 2018, 6:00 PM CST
Expired: Feb 25, 2018, 9:00 AM CST
In force: 15 hr
Issued by: NWS Duluth, MN

Counties Aitkin County, MN, Carlton County, MN, Cass County, MN, Cook County, MN, Crow Wing County, MN, Itasca County, MN, Lake County, MN, Pine County, MN, Saint Louis County, MN, Ashland County, WI, Bayfield County, WI, Burnett County, WI, Douglas County, WI, Iron County, WI, Price County, WI, Sawyer County, WI, Washburn County, WI

The radar

The Duluth radar (KDLH), 27 km from the middle of the area, began a volume at 20:04 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 12:00Z, 8.1 hours before the alert went out and 230 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: 485 m above ground
0-6 km bulk shear: 93 kt
0-1 km storm-relative helicity: -35 m²/s²
0-3 km storm-relative helicity: 95 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 storm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Duluth, MN wrote its last area forecast discussion before this winter storm warning went out at Feb 23, 12:05 PM CST, 2 hours earlier.

Area forecast discussion, Feb 23, 12:05 PM CST, 2 hours before

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Hazardous weather outlook, Feb 23, 4:49 AM CST, 9 hours 16 minutes before

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In the hours before

Local storm report, Feb 23, 12:33 PM CST, 1 hour 32 minutes before

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Local storm report, Feb 23, 12:53 PM CST, 1 hour 12 minutes before

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Local storm report, Feb 23, 12:54 PM CST, 1 hour 11 minutes before

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Local storm report, Feb 23, 1:29 PM CST, 36 minutes before

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Local storm report, Feb 23, 1:34 PM CST, 31 minutes before

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Local storm report, Feb 23, 2:04 PM CST, 1 minute before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 23, 2:05 PM CST	Winter Weather Advisory	DLH	Cass, Crow Wing, Itasca, Koochiching	43 hr

Nearby

Winter Storm Warnings in Minnesota, 2018 Winter Storm Warnings in Wisconsin, 2018 Every winter storm warning 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.