Alert archive / Wisconsin / Frost Advisories in 2020

Frost Advisory 1, NWS Milwaukee, WI

May 10, 202016 counties in Wisconsin

NWS Milwaukee, WI issued this frost advisory at May 10, 2020, 3:32 PM CDT for 16 counties in Wisconsin. It took effect at May 11, 2020, 2:00 AM CDT. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued: May 10, 2020, 3:32 PM CDT (20:32 UTC)
In effect from: May 11, 2020, 2:00 AM CDT
Expired: May 11, 2020, 8:00 AM CDT
In force: 6 hr
Issued by: NWS Milwaukee, WI

Counties Columbia County, WI, Dane County, WI, Dodge County, WI, Fond du Lac County, WI, Green County, WI, Green Lake County, WI, Iowa County, WI, Jefferson County, WI, Lafayette County, WI, Marquette County, WI, Rock County, WI, Sauk County, WI, Sheboygan County, WI, Walworth County, WI, Washington County, WI, Waukesha County, WI

The radar

The Milwaukee radar (KMKX), 50 km from the middle of the area, began a volume at 20:34 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, 8.5 hours before the alert went out and 159 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: 499 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 196 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 frost advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Milwaukee, WI wrote its last area forecast discussion before this frost advisory went out at May 10, 2:15 PM CDT, 1 hour 17 minutes earlier.

Area forecast discussion, May 10, 2:15 PM CDT, 1 hour 17 minutes before

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Hazardous weather outlook, May 10, 3:29 AM CDT, 12 hours 3 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 9, 8:56 PM CDT	Gale Warning	MKX		24 hr

Nearby

Frost Advisories in Wisconsin, 2020 Every frost advisory in 2020

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.