Alert archive / Minnesota / Winter Weather Advisories in 2009

Winter Weather Advisory 4, NWS Twin Cities, MN

January 13, 200929 counties in Minnesota

NWS Twin Cities, MN issued this winter weather advisory at Jan 13, 2009, 3:31 AM CST for 29 counties in Minnesota. It took effect at Jan 13, 2009, 12:00 PM CST. It was in force for 16 hr.

The area

The counties it named.

The facts

Issued: Jan 13, 2009, 3:31 AM CST (09:31 UTC)
In effect from: Jan 13, 2009, 12:00 PM CST
Expired: Jan 14, 2009, 4:00 AM CST
In force: 16 hr
Issued by: NWS Twin Cities, MN

All 29 counties

Blue Earth County, MN, Brown County, MN, Carver County, MN, Chippewa County, MN, Dakota County, MN, Faribault County, MN, Freeborn County, MN, Goodhue County, MN, Hennepin 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, Scott County, MN, Sibley County, MN, Steele County, MN, Stevens County, MN, Swift County, MN, Waseca County, MN, Watonwan County, MN, Wright County, MN, Yellow Medicine County, MN

The radar

The Minneapolis radar (KMPX), 70 km from the middle of the area, began a volume at 09:37 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 00:00Z, 9.5 hours before the alert went out and 320 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: 992 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: -57 m²/s²
0-3 km storm-relative helicity: -13 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 13, 3:23 AM CST, 8 minutes earlier.

Area forecast discussion, Jan 13, 3:23 AM CST, 8 minutes before

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Hazardous weather outlook, Jan 12, 9:55 PM CST, 5 hours 36 minutes before

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In the hours before

Local storm report, Jan 12, 9:32 PM CST, 5 hours 59 minutes before

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Local storm report, Jan 12, 9:40 PM CST, 5 hours 51 minutes before

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Local storm report, Jan 12, 9:45 PM CST, 5 hours 46 minutes before

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Local storm report, Jan 12, 9:52 PM CST, 5 hours 39 minutes before

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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Nearby

Winter Weather Advisories in Minnesota, 2009 Every winter weather advisory in 2009

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.