Alert archive / Wisconsin / Frost Advisories in 2020

Frost Advisory 6, NWS Milwaukee, WI

October 4, 202020 counties in Wisconsin

NWS Milwaukee, WI issued this frost advisory at Oct 4, 2020, 9:27 AM CDT for 20 counties in Wisconsin. It took effect at Oct 4, 2020, 11:00 PM CDT. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued: Oct 4, 2020, 9:27 AM CDT (14:27 UTC)
In effect from: Oct 4, 2020, 11:00 PM CDT
Expired: Oct 5, 2020, 8:00 AM CDT
In force: 9 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, Kenosha County, WI, Lafayette County, WI, Marquette County, WI, Milwaukee County, WI, Ozaukee County, WI, Racine 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), 31 km from the middle of the area, began a volume at 14:27 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

Davenport, (KDVN), launched 12:00Z, 2.5 hours before the alert went out and 220 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: 1257 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: -44 m²/s²
0-3 km storm-relative helicity: -8 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 Oct 4, 3:49 AM CDT, 5 hours 38 minutes earlier.

Area forecast discussion, Oct 4, 3:49 AM CDT, 5 hours 38 minutes before

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Hazardous weather outlook, Oct 4, 7:44 AM CDT, 1 hour 43 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Milwaukee/Sullivan WI
744 AM CDT Sun Oct 4 2020

WIZ046-047-051-052-056>060-062>072-051245-
Marquette-Green Lake-Fond du Lac-Sheboygan-Sauk-Columbia-Dodge-
Washington-Ozaukee-Iowa-Dane-Jefferson-Waukesha-Milwaukee-
Lafayette-Green-Rock-Walworth-Racine-Kenosha-
744 AM CDT Sun Oct 4 2020

This Hazardous Weather Outlook is for portions of east central
Wisconsin, south central Wisconsin and southeast Wisconsin.

.DAY ONE...Today and Tonight

Widespread frost is expected across most of the area later
tonight into early Monday.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

LMZ643>646-051245-
Sheboygan to Port Washington WI-
Port Washington to North Point Light WI-
North Point Light to Wind Point WI-
Wind Point WI to Winthrop Harbor IL-
744 AM CDT Sun Oct 4 2020

This Hazardous Weather Outlook is for the nearshore waters from
Sheboygan Wisconsin to Winthrop Harbor Illinois.

.DAY ONE...Today and Tonight

A Small Craft Advisory remains in effect today into this evening for
the Lake Michigan nearshore waters. Gusts to 25 knots will cause
waves to build to 3 to 7 feet.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Breezy south to southwest winds and high waves are expected
Monday afternoon and night. Gusty westerly winds are expected
Wednesday. A Small Craft Advisory will likely be needed for these
periods.

LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-051245-
Lake Michigan Michigan City IN to St. Joseph MI 5 NM offshore to
mid-line of lake.-
Lake Michigan from Seul Choix Point to Rock Island Passage 5NM
offshore to Mid Lake-
Lake Michigan South of a line from Seul Choix Point to the
Mackinac Bridge and North of a line from Charlevoix MI to South
Fox Island 5NM offshore-
Lake Michigan from Charlevoix to Point Betsie MI 5NM Offshore to
mid lake-
Lake Michigan from Point Betsie to Manistee MI 5NM offshore to
Mid Lake-
Lake Michigan from Rock Island Passage to Sturgeon Bay WI 5NM
offshore to mid lake-
Lake Michigan from Sturgeon Bay to Two Rivers WI 5NM offshore to
Mid Lake-
Lake Michigan from Two Rivers to Sheboygan WI 5NM offshore to Mid
Lake-
Lake Michigan from Sheboygan to Port Washington WI 5NM offshore
to Mid Lake-
Lake Michigan from Port Washington to North Point Light WI 5NM
offshore to Mid Lake-
Lake Michigan from North Point Light to Wind Point WI 5NM
offshore to Mid Lake-
Lake Michigan from Wind Point WI to Winthrop Harbor IL 5NM
offshore to Mid Lake-
Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5NM
offshore to Mid Lake-
Lake Michigan from Wilmette Harbor to Michigan City in 5NM
offshore to Mid Lake-
Lake Michigan from Pentwater to Manistee MI 5NM offshore to Mid
Lake-
Lake Michigan from Whitehall to Pentwater MI 5NM offshore to Mid
Lake-
Lake Michigan from Grand Haven to Whitehall MI 5NM offshore to
Mid Lake-
Lake Michigan from Holland to Grand Haven MI 5NM offshore to Mid
Lake-
Lake Michigan from South Haven to Holland MI 5NM offshore to Mid
lake-
Lake Michigan from St Joseph to South Haven MI 5NM offshore to
Mid Lake-
744 AM CDT Sun Oct 4 2020

This Hazardous Weather Outlook is for the open waters of Lake
Michigan.

.DAY ONE...Today and Tonight

There is a slight chance for waterspouts associated with
scattered showers today.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Gusty south winds will develop on Monday and continue into Monday
night. A Gale Watch has been posted for the northern two-thirds of
the Lake Michigan open waters from Monday afternoon through Monday
night. Gusts to 40 knots will be possible. Waves will build to 8
to 12 feet.

Gusty west to northwest winds are expected late Tuesday night and
Wednesday and may also reach gale force across the entire lake.

www.weather.gov/mkx

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 4, 3:13 AM CDT	Gale Watch	MKX		11 hr
Oct 4, 1:58 PM CDT	Gale Warning	MKX		37 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.