Alert archive / Minnesota / Winter Weather Advisories in 2013

Winter Weather Advisory 22, NWS Twin Cities, MN

April 17, 201316 counties in Minnesota; 6 counties in Wisconsin

NWS Twin Cities, MN issued this winter weather advisory at Apr 17, 2013, 3:32 PM CDT for 16 counties in Minnesota; 6 counties in Wisconsin. It took effect at Apr 18, 2013, 7:00 AM CDT. It was in force for 30 hr.

The area

The counties it named.

The facts

Issued: Apr 17, 2013, 3:32 PM CDT (20:32 UTC)
In effect from: Apr 18, 2013, 7:00 AM CDT
Expired: Apr 19, 2013, 1:00 PM CDT
In force: 30 hr
Issued by: NWS Twin Cities, MN

All 22 counties

Blue Earth County, MN, Dakota County, MN, Douglas County, MN, Faribault County, MN, Goodhue County, MN, Le Sueur County, MN, Martin County, MN, Ramsey County, MN, Rice County, MN, Scott County, MN, Steele County, MN, Stevens County, MN, Todd County, MN, Waseca County, MN, Washington County, MN, Watonwan County, MN, Barron County, WI, Dunn County, WI, Pierce County, WI, Polk County, WI, Rusk County, WI, Saint Croix County, WI

The radar

The Minneapolis radar (KMPX), 17 km from the middle of the area, began a volume at 20:32 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

Aberdeen, SD (KABR), launched 12:00Z, 8.5 hours before the alert went out and 394 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: 667 m above ground
0-6 km bulk shear: 81 kt
0-1 km storm-relative helicity: -14 m²/s²
0-3 km storm-relative helicity: 116 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 Apr 17, 12:41 PM CDT, 2 hours 51 minutes earlier.

Area forecast discussion, Apr 17, 12:41 PM CDT, 2 hours 51 minutes before

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Hazardous weather outlook, Apr 17, 12:19 PM CDT, 3 hours 13 minutes before

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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
Apr 16, 8:59 PM CDT	Winter Storm Watch	MPX	Anoka, Benton, Blue Earth, Brown, Carver, Chippewa and 30 more	19 hr
Apr 17, 3:32 PM CDT	Winter Storm Warning	MPX	Anoka, Benton, Blue Earth, Brown, Carver, Chippewa and 30 more	42 hr

Nearby

Winter Weather Advisories in Minnesota, 2013 Winter Weather Advisories in Wisconsin, 2013 Every winter weather advisory in 2013

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.