Alert archive / Minnesota / Winter Weather Advisories in 2011

Winter Weather Advisory 7, NWS La Crosse, WI

February 1, 20115 counties in Wisconsin; 7 counties in Minnesota; 5 counties in Iowa

NWS La Crosse, WI issued this winter weather advisory at Feb 1, 2011, 4:37 AM CST for 5 counties in Wisconsin; 7 counties in Minnesota; 5 counties in Iowa. It took effect at Feb 1, 2011, 12:00 PM CST. It was in force for 22 hr.

The area

The counties it named.

The facts

Issued: Feb 1, 2011, 4:37 AM CST (10:37 UTC)
In effect from: Feb 1, 2011, 12:00 PM CST
Expired: Feb 2, 2011, 9:44 AM CST
In force: 22 hr
Issued by: NWS La Crosse, WI

Counties Chickasaw County, IA, Floyd County, IA, Howard County, IA, Mitchell County, IA, Winneshiek County, IA, Dodge County, MN, Fillmore County, MN, Houston County, MN, Mower County, MN, Olmsted County, MN, Wabasha County, MN, Winona County, MN, Adams County, WI, Juneau County, WI, La Crosse County, WI, Monroe County, WI, Vernon County, WI

The radar

The La Crosse radar (KARX), 49 km from the middle of the area, began a volume at 10:38 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, 10.6 hours before the alert went out and 194 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: 968 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 109 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 La Crosse, WI wrote its last area forecast discussion before this winter weather advisory went out at Feb 1, 3:52 AM CST, 45 minutes earlier.

Area forecast discussion, Feb 1, 3:52 AM CST, 45 minutes before

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Hazardous weather outlook, Jan 31, 8:48 AM CST, 19 hours 49 minutes before

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In the hours before

Special weather statement, Feb 1, 3:58 AM CST, 39 minutes before

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The office that day

Everything else NWS La Crosse, WI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 1, 4:37 AM CST	Winter Storm Warning	ARX	Crawford, Grant, Richland	29 hr

Nearby

Winter Weather Advisories in Minnesota, 2011 Winter Weather Advisories in Wisconsin, 2011 Winter Weather Advisories in Iowa, 2011 Every winter weather advisory in 2011

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.