Frost Advisory
URGENT - WEATHER MESSAGE
National Weather Service Green Bay WI
944 PM CDT Wed May 20 2026
WIZ005-010>013-018-019-021-073-211300-
/O.CON.KGRB.FR.Y.0008.260521T0500Z-260521T1300Z/
Vilas-Oneida-Forest-Florence-Northern Marinette County-Lincoln-
Langlade-Northern Oconto County-Southern Marinette County-
Including the cities of High Falls Reservoir, Niagara, Middle Inlet,
Eagle River, Lac Du Flambeau, Lakewood, Loomis, Aurora, Tomahawk,
Wausaukee, Peshtigo, Merrill, Crandon, Spread Eagle, Crivitz,
Commonwealth, Mountain, Porterfield, Harmony, Rhinelander, Townsend,
and Antigo
944 PM CDT Wed May 20 2026
...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM CDT THURSDAY...
* WHAT...Temperatures as low as 30 will result in frost formation.
* WHERE...Langlade, Lincoln, Oneida, Vilas, Florence, Forest,
Northern Marinette County, Northern Oconto County, and Southern
Marinette counties.
* WHEN...Until 8 AM CDT Thursday.
* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive
outdoor plants may be killed if left uncovered.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Take steps now to protect tender plants from the cold.
&&
$$
For more information, visit us at http://www.weather.gov/GreenBay
Bersch
URGENT - WEATHER MESSAGE
National Weather Service Duluth MN
935 PM CDT Wed May 20 2026
MNZ012-019>021-037-WIZ001>004-008-009-211300-
/O.CON.KDLH.FR.Y.0005.260521T0600Z-260521T1300Z/
Northern Cook and Lake-Central St. Louis-Southern Lake-Southern
Cook-Carlton and South St. Louis-Douglas-Bayfield-Ashland-Iron-
Sawyer-Price-
Including the cities of Hurley, Hibbing, Hayward, Isabella, Two
Harbors, Superior, Washburn, Duluth, Ashland, Grand Marais,
Bayfield, Silver Bay, and Phillips
935 PM CDT Wed May 20 2026
...FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 8 AM CDT THURSDAY...
* WHAT...Temperatures as low as 32 will result in frost formation.
* WHERE...In Minnesota, Carlton, South and Central St. Louis, Cook
and Lake Counties. In Wisconsin, Price, Ashland, Bayfield,
Douglas, Iron, and Sawyer Counties. This includes the Tribal Lands
of the northwestern area of the Lac du Flambeau Band, the Fond du
Lac Band, the Bad River Reservation, the Bois Forte Band, Lake
Vermilion area, the Red Cliff Band, the Lac Courte Oreilles
Reservation and the Grand Portage Reservation. Other locations
including Madeline Island and the Apostle Islands National
Lakeshore. This also includes the Boundary Waters eastern and
central area.
* WHEN...From 1 AM to 8 AM CDT Thursday.
* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive
outdoor plants may be killed if left uncovered.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Take steps now to protect tender plants from the cold.
&&
$$
For more information on Northland weather, visit www.weather.
gov/duluth
LE
URGENT - WEATHER MESSAGE
National Weather Service Marquette MI
157 PM EDT Wed May 20 2026
MIZ001>006-009>014-084-085-211300-
/O.NEW.KMQT.FR.Y.0001.260521T0300Z-260521T1300Z/
Keweenaw-Ontonagon-Northern Houghton-Baraga-Marquette-Alger-
Gogebic-Iron-Dickinson-Menominee-Delta-Southern Schoolcraft-
Southern Houghton-Northern Schoolcraft-
Including the cities of L`Anse, Iron River, Copper Harbor,
Menominee, Ontonagon, Gladstone, Sidnaw, Munising, Escanaba,
Kenton, Marquette, Hancock, Seney, Iron Mountain, Manistique,
Gwinn, Grand Marais, Ironwood, and Houghton
157 PM EDT Wed May 20 2026 /1257 PM CDT Wed May 20 2026/
...FROST ADVISORY IN EFFECT FROM 11 PM EDT /10 PM CDT/ THIS EVENING
TO 9 AM EDT /8 AM CDT/ THURSDAY...
* WHAT...Temperatures as low as 28 will result in frost formation.
* WHERE...Portions of central Upper and western Upper Michigan.
* WHEN...From 11 PM EDT /10 PM CDT/ this evening to 9 AM EDT /8 AM
CDT/ Thursday.
* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive
outdoor plants may be killed if left uncovered.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Take steps now to protect tender plants from the cold.
&&
$$
77
URGENT - WEATHER MESSAGE
National Weather Service Gaylord MI
135 PM EDT Wed May 20 2026
MIZ016>018-020-021-024>026-030>036-041-042-099-211300-
/O.CON.KAPX.FR.Y.0010.260521T0500Z-260521T1300Z/
Emmet-Cheboygan-Presque Isle-Leelanau-Antrim-Alpena-Benzie-Grand
Traverse-Alcona-Manistee-Wexford-Missaukee-Roscommon-Ogemaw-Iosco-
Gladwin-Arenac-Charlevoix-
135 PM EDT Wed May 20 2026
...FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 9 AM EDT THURSDAY...
* WHAT...Temperatures as low as 33 will result in frost formation.
* WHERE...A portion of Northern Lower Michigan.
* WHEN...From 1 AM to 9 AM EDT Thursday.
* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive
outdoor plants may be killed if left uncovered.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Take steps now to protect tender plants from the cold.
&&
$$
ELD
URGENT - WEATHER MESSAGE
National Weather Service Grand Rapids MI
133 PM EDT Wed May 20 2026
MIZ037>040-043>046-210145-
/O.NEW.KGRR.FR.Y.0011.260521T0500Z-260521T1300Z/
Mason-Lake-Osceola-Clare-Oceana-Newaygo-Mecosta-Isabella-
Including the cities of Big Rapids, Baldwin, Reed City, Clare,
Hart, Ludington, Fremont, and Mount Pleasant
133 PM EDT Wed May 20 2026
...FROST ADVISORY IN EFFECT FROM 1 AM TO 9 AM EDT THURSDAY...
* WHAT...Temperatures as low as 32 will result in frost formation.
* WHERE...Clare, Isabella, Mecosta, Osceola, Lake, Mason, Newaygo,
and Oceana Counties.
* WHEN...From 1 AM to 9 AM EDT Thursday.
* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive
outdoor plants may be killed if left uncovered.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Take steps now to protect tender plants from the cold.
&&
$$
RAH
Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Duluth MN
332 PM CDT Wed May 20 2026
MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-212045-
Koochiching-North St. Louis-Northern Cook/Northern Lake-
North Itasca-Central St. Louis-Southern Lake/North Shore-
Southern Cook/North Shore-North Cass-South Itasca-South Cass-
Crow Wing-Northern Aitkin-South Aitkin-Carlton/South St. Louis-
Pine-Douglas-Bayfield-Ashland-Iron-Burnett-Washburn-Sawyer-Price-
332 PM CDT Wed May 20 2026
This Hazardous Weather Outlook is for portions of northeast
Minnesota and northwest Wisconsin.
.DAY ONE...This afternoon and Tonight
Frost is expected for the Arrowhead towards the Twin Ports and
much of northwest Wisconsin tonight. Frost advisories are in
effect.
Localized minor flooding continues over portions of the Boundary
Waters.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday
Dry weather is expected through Friday. Near-critical fire weather
may be possible for localized areas.
.SPOTTER INFORMATION STATEMENT...
Skywarn spotter activation will not be needed today or tonight.
$$
Hazardous Weather Outlook
National Weather Service Marquette MI
343 PM EDT Wed May 20 2026
MIZ001>007-009>014-084-085-211945-
Keweenaw-Ontonagon-Northern Houghton-Baraga-Marquette-Alger-Luce-
Gogebic-Iron-Dickinson-Menominee-Delta-Southern Schoolcraft-
Southern Houghton-Northern Schoolcraft-
343 PM EDT Wed May 20 2026 /243 PM CDT Wed May 20 2026/
This Hazardous Weather Outlook is for portions of central Upper
Michigan and western Upper Michigan.
.DAY ONE...Tonight
Widespread frost tonight. This may impact vulnerable plants and
agriculture.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday
Widespread frost Thursday morning. Areas of frost possible
Thursday night into Friday morning in the interior UP (30-50%
chance). This may impact vulnerable plants and agriculture.
.SPOTTER INFORMATION STATEMENT...
The need for weather spotter reports is not anticipated at this
time.
$$
Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
207 PM CDT Wed May 20 2026
LMZ643>646-211915-
Sheboygan to Port Washington WI-
Port Washington to North Point Light WI-
North Point Light to Wind Point WI-
Wind Point WI to Winthrop Harbor IL-
207 PM CDT Wed May 20 2026
This Hazardous Weather Outlook is for the nearshore waters from
Sheboygan Wisconsin to Winthrop Harbor Illinois.
.DAY ONE...Tonight
A Small Craft Advisory is in effect from this afternoon into
Thursday afternoon for zones south of North Point Light for high
waves.
.DAYS TWO THROUGH SEVEN...Thursday through Wednesday
A Small Craft Advisory continues through Friday evening due to
persistent easterly winds, and may be needed through Saturday.
$$
Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
207 PM CDT Wed May 20 2026
WIZ046-047-051-052-056>060-062>072-211915-
Marquette-Green Lake-Fond du Lac-Sheboygan-Sauk-Columbia-Dodge-
Washington-Ozaukee-Iowa-Dane-Jefferson-Waukesha-Milwaukee-
Lafayette-Green-Rock-Walworth-Racine-Kenosha-
207 PM CDT Wed May 20 2026
This Hazardous Weather Outlook is for portions of east central
Wisconsin, south central Wisconsin and southeast Wisconsin.
.DAY ONE...Tonight
A High Swim Risk is anticipated at beaches in Milwaukee, Racine,
and Kenosha Counties this afternoon through tonight. Stay out of
the water and avoid the north sides of piers and breakwalls.
Dangerous currents are expected.
.DAYS TWO THROUGH SEVEN...Thursday through Wednesday
A High Swim Risk continues into Thursday afternoon.
Another High Swim Risk may occur Thursday night through Friday.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed.
$$
Hazardous Weather Outlook
National Weather Service Green Bay WI
126 PM CDT Wed May 20 2026
WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-211830-
Vilas-Oneida-Forest-Florence-Northern Marinette County-Lincoln-
Langlade-Menominee-Northern Oconto County-Door-Marathon-Shawano-
Wood-Portage-Waupaca-Outagamie-Brown-Kewaunee-Waushara-Winnebago-
Calumet-Manitowoc-Southern Marinette County-
Southern Oconto County-
126 PM CDT Wed May 20 2026
This Hazardous Weather Outlook is for north-central and northeast
Wisconsin.
.DAY ONE...Tonight
A Frost Advisory is in effect for northern Wisconsin tonight.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday
Areas of frost are possible across northern Wisconsin Thursday
night.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed tonight.
$$
Hazardous Weather Outlook
National Weather Service Gaylord MI
317 AM EDT Wed May 20 2026
MIZ016>018-020>036-041-042-086>088-095>099-210730-
Emmet-Cheboygan-Presque Isle-Leelanau-Antrim-Otsego-Montmorency-
Alpena-Benzie-Grand Traverse-Kalkaska-Crawford-Oscoda-Alcona-
Manistee-Wexford-Missaukee-Roscommon-Ogemaw-Iosco-Gladwin-Arenac-
Western Chippewa-Central Chippewa-Southeast Chippewa-
Western Mackinac-Eastern Mackinac-
Mackinac Island/Bois Blanc Island-
Beaver Island and surrounding islands-Charlevoix-
317 AM EDT Wed May 20 2026
This hazardous weather outlook is for Eastern Upper Michigan and
Northern Lower Michigan.
**This will be the final issuance of the Hazardous Weather
Outlook. For any forecast details, please view the Area Forecast
Discussion.**
.DAY ONE...Today and tonight.
Widespread frost/freeze possible tonight. See the latest Freeze
Watch for additional details.
.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.
No hazardous weather is expected at this time.
.SPOTTER INFORMATION STATEMENT...
Spotters are encouraged to report any significant weather and
rainfall amounts to the National Weather Service. Reports may be
made one of three ways:
Online: weather.gov/gaylord
Facebook: facebook.com/nwsgaylord
Twitter: twitter.com/nwsgaylord
For more information visit http://weather.gov/gaylord.
$$
