Alert archive / Minnesota / Winter Weather Advisories in 2015

Winter Weather Advisory 4, NWS Twin Cities, MN

January 8, 201528 counties in Minnesota; 9 counties in Wisconsin

NWS Twin Cities, MN issued this winter weather advisory at Jan 8, 2015, 4:20 AM CST for 28 counties in Minnesota; 9 counties in Wisconsin. It took effect at Jan 8, 2015, 9:00 AM CST. It was in force for 15 hr.

The area

The counties it named.

The facts

Issued: Jan 8, 2015, 4:20 AM CST (10:20 UTC)
In effect from: Jan 8, 2015, 9:00 AM CST
Expired: Jan 9, 2015, 12:00 AM CST
In force: 15 hr
Issued by: NWS Twin Cities, MN

All 37 counties

Anoka County, MN, Benton County, MN, Carver County, MN, Chippewa County, MN, Chisago County, MN, Dakota County, MN, Douglas County, MN, Goodhue County, MN, Hennepin County, MN, Isanti County, MN, Kanabec County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, McLeod County, MN, Meeker County, MN, Mille Lacs County, MN, Morrison County, MN, Pope County, MN, Ramsey County, MN, Rice County, MN, Scott County, MN, Sherburne County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Washington County, MN, Wright County, MN, Barron County, WI, Chippewa County, WI, Dunn County, WI, Eau Claire County, WI, Pepin County, WI, Pierce County, WI, Polk County, WI, Rusk County, WI, Saint Croix County, WI

The radar

The Minneapolis radar (KMPX), 41 km from the middle of the area, began a volume at 10:21 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, 10.3 hours before the alert went out and 41 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: 1009 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 215 m²/s²
0-3 km storm-relative helicity: 214 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 Jan 7, 11:13 PM CST, 5 hours 7 minutes earlier.

Area forecast discussion, Jan 7, 11:13 PM CST, 5 hours 7 minutes before

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Hazardous weather outlook, Jan 7, 7:42 PM CST, 8 hours 38 minutes before

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<body>
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    <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>
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        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
Jan 8, 4:20 AM CST	Blizzard Warning	MPX	Blue Earth, Brown, Chippewa, Faribault, Freeborn, Goodhue and 16 more	23 hr
Jan 8, 3:49 PM CST	Wind Chill Advisory	MPX	Anoka, Benton, Blue Earth, Brown, Carver, Chippewa and 36 more	20 hr

Nearby

Winter Weather Advisories in Minnesota, 2015 Winter Weather Advisories in Wisconsin, 2015 Every winter weather advisory in 2015

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.