Alert archive / Wisconsin / Winter Storm Watches in 2011

Winter Storm Watch 1, NWS Green Bay, WI

February 18, 201122 counties in Wisconsin

NWS Green Bay, WI issued this winter storm watch at Feb 18, 2011, 3:08 PM CST for 22 counties in Wisconsin. It took effect at Feb 20, 2011, 6:00 AM CST. It was in force for .

The area

The counties it named.

The facts

Issued: Feb 18, 2011, 3:08 PM CST (21:08 UTC)
In effect from: Feb 20, 2011, 6:00 AM CST
Expired: Feb 19, 2011, 2:08 PM CST
In force
Issued by: NWS Green Bay, WI

All 22 counties

Brown County, WI, Calumet County, WI, Door County, WI, Florence County, WI, Forest County, WI, Kewaunee County, WI, Langlade County, WI, Lincoln County, WI, Manitowoc County, WI, Marathon County, WI, Marinette County, WI, Menominee County, WI, Oconto County, WI, Oneida County, WI, Outagamie County, WI, Portage County, WI, Shawano County, WI, Vilas County, WI, Waupaca County, WI, Waushara County, WI, Winnebago County, WI, Wood County, WI

The radar

The Green Bay radar (KGRB), 63 km from the middle of the area, began a volume at 21:09 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

Green Bay/Straub, WI (KGRB), launched 12:00Z, 9.1 hours before the alert went out and 65 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: 1150 m above ground
0-6 km bulk shear: 104 kt
0-1 km storm-relative helicity: -46 m²/s²
0-3 km storm-relative helicity: 18 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 Green Bay, WI wrote its last area forecast discussion before this winter storm watch went out at Feb 18, 10:02 AM CST, 5 hours 6 minutes earlier.

Area forecast discussion, Feb 18, 10:02 AM CST, 5 hours 6 minutes before

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Hazardous weather outlook, Feb 18, 11:51 AM CST, 3 hours 17 minutes before

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In the hours before

Special weather statement, Feb 18, 10:42 AM CST, 4 hours 26 minutes before

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The office that day

Everything else NWS Green Bay, WI issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 18, 4:19 AM CST	Gale Warning	GRB		26 hr

Nearby

Winter Storm Watches in Wisconsin, 2011 Every winter storm watch 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.