Alert archive / Minnesota / Winter Weather Advisories in 2013

Winter Weather Advisory 31, NWS Twin Cities, MN

December 9, 201323 counties in Minnesota

NWS Twin Cities, MN issued this winter weather advisory at Dec 9, 2013, 8:44 PM CST for 23 counties in Minnesota. It took effect at Dec 9, 2013, 11:00 PM CST. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: Dec 9, 2013, 8:44 PM CST (02:44 UTC)
In effect from: Dec 9, 2013, 11:00 PM CST
Expired: Dec 10, 2013, 6:00 AM CST
In force: 7 hr
Issued by: NWS Twin Cities, MN

All 23 counties

Blue Earth County, MN, Brown County, MN, Chippewa County, MN, Faribault County, MN, Freeborn County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, Le Sueur County, MN, Martin County, MN, McLeod County, MN, Meeker County, MN, Nicollet County, MN, Pope County, MN, Redwood County, MN, Renville County, MN, Rice County, MN, Sibley County, MN, Steele County, MN, Stevens County, MN, Swift County, MN, Waseca County, MN, Watonwan County, MN, Yellow Medicine County, MN

The radar

The Minneapolis radar (KMPX), 90 km from the middle of the area, began a volume at 02:41 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, 2.7 hours before the alert went out and 88 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: 923 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 202 m²/s²
0-3 km storm-relative helicity: 248 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 9, 6:19 PM CST, 2 hours 25 minutes earlier.

Area forecast discussion, Dec 9, 6:19 PM CST, 2 hours 25 minutes before

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Hazardous weather outlook, Dec 9, 3:22 PM CST, 5 hours 22 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
Dec 10, 4:05 AM CST	Wind Chill Warning	MPX	Benton, Chisago, Douglas, Isanti, Kanabec, Mille Lacs and 6 more	32 hr
Dec 10, 4:05 AM CST	Wind Chill Advisory	MPX	Anoka, Benton, Blue Earth, Brown, Carver, Chippewa and 31 more	47 hr

Nearby

Winter Weather Advisories in Minnesota, 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.