Alert archive / Wisconsin / Winter Storm Watches in 2018

Winter Storm Watch 3, NWS La Crosse, WI

February 18, 201811 counties in Wisconsin; 6 counties in Iowa; Fillmore County, Houston County, Winona County, Minnesota

NWS La Crosse, WI issued this winter storm watch at Feb 18, 2018, 3:48 AM CST for 11 counties in Wisconsin; 6 counties in Iowa; Fillmore County, Houston County, Winona County, Minnesota. It took effect at Feb 19, 2018, 6:00 PM CST. It was in force for .

The area

The counties it named.

The facts

Issued: Feb 18, 2018, 3:48 AM CST (09:48 UTC)
In effect from: Feb 19, 2018, 6:00 PM CST
Expired: Feb 19, 2018, 1:32 AM CST
In force
Issued by: NWS La Crosse, WI

Counties Allamakee County, IA, Chickasaw County, IA, Clayton County, IA, Fayette County, IA, Howard County, IA, Winneshiek County, IA, Fillmore County, MN, Houston County, MN, Winona County, MN, Adams County, WI, Clark County, WI, Crawford County, WI, Jackson County, WI, Juneau County, WI, La Crosse County, WI, Monroe County, WI, Richland County, WI, Taylor County, WI, Trempealeau County, WI, Vernon County, WI

The radar

The La Crosse radar (KARX), 11 km from the middle of the area, began a volume at 09:53 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, 9.8 hours before the alert went out and 230 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: 1747 m above ground
0-6 km bulk shear: 71 kt
0-1 km storm-relative helicity: 80 m²/s²
0-3 km storm-relative helicity: 143 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 storm watch 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 storm watch went out at Feb 18, 3:35 AM CST, 13 minutes earlier.

Area forecast discussion, Feb 18, 3:35 AM CST, 13 minutes before

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Hazardous weather outlook, Feb 17, 6:00 PM CST, 9 hours 48 minutes before

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In the hours before

Special weather statement, Feb 18, 1:48 AM CST, 2 hours before

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Special weather statement, Feb 18, 3:44 AM CST, 4 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 18, 3:48 AM CST	Winter Weather Advisory	ARX	Adams, Buffalo, Clark, Jackson, Juneau, La Crosse and 3 more	58 hr
Feb 18, 3:30 AM CST	Wind Advisory	ARX	Chickasaw, Fayette, Floyd, Howard, Mitchell, Winneshiek	12 hr

Nearby

Winter Storm Watches in Wisconsin, 2018 Winter Storm Watches in Iowa, 2018 Winter Storm Watches in Minnesota, 2018 Every winter storm watch in 2018

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.