Alert archive / Wisconsin / Special Weather Statements in 2020

Special Weather Statement, NWS Milwaukee, WI

October 12, 2020Dodge County, Fond du Lac County, Wisconsin

NWS Milwaukee, WI issued this special weather statement at Oct 12, 2020, 10:48 AM CDT for Dodge County, Fond du Lac County, Wisconsin. It was in force for 27 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Oct 12, 2020, 10:48 AM CDT (15:48 UTC)
Expired
Oct 12, 2020, 11:15 AM CDT
In force
27 min
Issued by
NWS Milwaukee, WI

Counties Dodge County, WI, Fond du Lac County, WI

The radar

The Milwaukee radar (KMKX), 81 km from the middle of the area, began a volume at 15:47 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, 3.8 hours before the alert went out and 91 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-pSkew-T log-p diagram, Green Bay/Straub, WI at 12:00Z on 2020-10-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Green Bay/Straub, WI at 12:00Z on 2020-10-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 258 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
735 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
258 m²/s²
0-3 km storm-relative helicity
283 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Oct 12, 10:31 AM CDT, 17 minutes earlier.

Area forecast discussion, Oct 12, 10:31 AM CDT, 17 minutes before
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Hazardous weather outlook, Oct 12, 3:37 AM CDT, 7 hours 11 minutes before
Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
337 AM CDT Mon Oct 12 2020

WIZ046-047-051-052-056>060-062>072-130845-
Marquette-Green Lake-Fond du Lac-Sheboygan-Sauk-Columbia-Dodge-
Washington-Ozaukee-Iowa-Dane-Jefferson-Waukesha-Milwaukee-
Lafayette-Green-Rock-Walworth-Racine-Kenosha-
337 AM CDT Mon Oct 12 2020

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

.DAY ONE...Today and Tonight

There is a chance of thunderstorms this morning and early this
afternoon. Strong westerly winds behind a cold front could bring
brief wind gusts of 35 to 40 mph this afternoon.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Frost and freezing temperatures are looking more likely Friday and
Saturday mornings.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

LMZ643>646-130845-
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-
337 AM CDT Mon Oct 12 2020

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

.DAY ONE...Today and Tonight

Southeast winds will continue to increase through the morning with
winds of 15 to 25 knots. A few gusts to 30 knots are possible. A
Small Craft Advisory remains in effect. A cold front will move
through late this morning, early this afternoon and winds quickly
shift to the west behind the front. Winds quickly increase to gale
force with gusts of 35 to 40 knots expected this afternoon and
evening. A Small Craft Advisory is in effect until mid morning and
is then upgraded to a Gale Warning.

There is a small chance for thunderstorms late this morning.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Several passing low pressure systems will likely bring a few more
periods of Small Craft conditions to the nearshore waters from
Tuesday through Friday.

LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-130845-
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-
337 AM CDT Mon Oct 12 2020

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

.DAY ONE...Today and Tonight

A passing cold front will result in several periods of gusty
winds over the Lake Michigan open waters today. Occasional gusts
to 40 knots are expected. A Gale Warning has been posted from
mid- morning today through the evening.

There is a small chance for thunderstorms today.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Several passing low pressure systems will bring periods of gusty
winds approaching gale force at times later this week.

www.weather.gov/mkx

In the hours before

Local storm report, Oct 12, 9:22 AM CDT, 1 hour 26 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
922 AM CDT MON OCT 12 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0905 AM     HAIL             ENDEAVOR                43.72N 89.47W
10/12/2020  M0.88 INCH       MARQUETTE          WI   FIRE DEPT/RESCUE

            NICKEL SIZE HAIL LASTED ABOUT A MINUTE AND A
            HALF.

&&

WOOD
Special weather statement, Oct 12, 10:13 AM CDT, 35 minutes before
Special Weather Statement
National Weather Service Milwaukee/Sullivan WI
1013 AM CDT Mon Oct 12 2020

WIZ057-058-063-121545-
Dodge-Columbia-Dane-

...SEVERAL STRONG THUNDERSTORMS WILL AFFECT COLUMBIA...NORTHWESTERN
DANE AND NORTHWESTERN DODGE COUNTIES...

At 1011 AM CDT, a strong thunderstorm was located near Rio, or 10
miles northwest of Columbus, moving northeast quickly at 65 mph.

Another strong thunderstorms was Spring Green, moving rapidly
northeast.

Winds of 30 to 40 mph and penny size hail are possible with these
storms

Locations that may be impacted include...

Sun Prairie, Waunakee, Portage, Windsor, Lake Wisconsin, Deforest,
Lodi, Poynette, Pardeeville, Randolph, Rio, Cambria, Dane,
Arlington, Wyocena, Otsego, Friesland, Doylestown, Harmony Grove and
Morrisonville.

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 4320 8925 4319 8972 4363 8939 4362 8890
TIME...MOT...LOC 1511Z 213DEG 57KT 4341 8920

MBK
Special weather statement, Oct 12, 10:48 AM CDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Oct 12, 10:13 AM CDTSpecial Weather StatementMKXColumbia32 min

Nearby

Special Weather Statements in Wisconsin, 2020Every special weather statement 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.