Alert archive / Minnesota / Winter Weather Advisories in 2016

Winter Weather Advisory 17, NWS Twin Cities, MN

December 22, 20167 counties in Minnesota; 5 counties in Wisconsin

NWS Twin Cities, MN issued this winter weather advisory at Dec 22, 2016, 2:15 PM CST for 7 counties in Minnesota; 5 counties in Wisconsin. It took effect at Dec 23, 2016, 6:00 AM CST. It was in force for 15 hr.

The area

The counties it named.

The facts

Issued: Dec 22, 2016, 2:15 PM CST (20:15 UTC)
In effect from: Dec 23, 2016, 6:00 AM CST
Expired: Dec 23, 2016, 9:00 PM CST
In force: 15 hr
Issued by: NWS Twin Cities, MN

Counties Faribault County, MN, Freeborn County, MN, Goodhue County, MN, Martin County, MN, Rice County, MN, Steele County, MN, Waseca County, MN, Chippewa County, WI, Dunn County, WI, Eau Claire County, WI, Pepin County, WI, Pierce County, WI

The radar

The Minneapolis radar (KMPX), 84 km from the middle of the area, began a volume at 20:20 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

Green Bay/Straub, WI (KGRB), launched 12:00Z, 8.3 hours before the alert went out and 375 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: 889 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 70 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 Dec 22, 11:55 AM CST, 2 hours 20 minutes earlier.

Area forecast discussion, Dec 22, 11:55 AM CST, 2 hours 20 minutes before

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Hazardous weather outlook, Dec 22, 10:43 AM CST, 3 hours 32 minutes before

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Nearby

Winter Weather Advisories in Minnesota, 2016 Winter Weather Advisories in Wisconsin, 2016 Every winter weather advisory in 2016

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.