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Frost Advisory 0008
Issued by the Green Bay Forecast Office

Action Issued Starts Expiration
New 2026-05-20 13:18:24 2026-05-21 00:00:00 2026-05-21 08:00:00
Continued 2026-05-20 21:44:42 2026-05-21 00:00:00 2026-05-21 08:00:00
Continued 2026-05-21 02:01:18 2026-05-21 08:00:00
Area Extended 2026-05-21 04:20:35 2026-05-21 08:00:00
Continued 2026-05-21 04:20:35 2026-05-21 08:00:00
Upgraded 2026-05-21 04:20:35 2026-05-21 08:00:00
Expired 2026-05-21 07:54:12 2026-05-21 08:00:00


Action: New
Issued At: 2026-05-20 13:18:24

461 
WWUS73 KGRB 201817
NPWGRB

URGENT - WEATHER MESSAGE
National Weather Service Green Bay WI
117 PM CDT Wed May 20 2026

WIZ005-010>013-018-019-021-073-210500-
/O.NEW.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 Commonwealth, Dunbar, Breed, Cavour, Pembine,
Merrill, Mc Naughton, Crivitz, Antigo, Starks, Armstrong Creek,
Elcho, Goodman, Mountain, Lac Du Flambeau, Argonne, Klondike, Middle
Inlet, Harmony, High Falls Reservoir, Loomis, Deerbrook, Jeffris,
Kempster, Bloomville, Woodboro, Goodnow, Boulder Junction, Polar,
Arbor Vitae, Crandon, Spread Eagle, Doering, Bryant, Conover, Laona,
Pine River, Harrison, Lakewood, Porterfield, Neva, Winchester,
Rhinelander, Presque Isle, Townsend, Hiles, Blackwell, Lake Tomahawk,
Peshtigo, Niagara, Gleason, Enterprise, Manitowish Waters, and Aurora
117 PM CDT Wed May 20 2026

...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM CDT
THURSDAY...

* WHAT...Temperatures around 30 degrees will result in frost
  formation.

* WHERE...Langlade, Lincoln, Oneida, Vilas, Florence, Forest,
  Northern Marinette County, Northern Oconto County, and Southern
  Marinette counties.

* WHEN...From midnight tonight 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, visit us at http://www.weather.gov/GreenBay

Kurimski


Action: Continued
Issued At: 2026-05-20 21:44:42

324 
WWUS73 KGRB 210244
NPWGRB

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


Action: Continued
Issued At: 2026-05-21 02:01:18

790 
WWUS73 KGRB 210700
NPWGRB

URGENT - WEATHER MESSAGE
National Weather Service Green Bay WI
200 AM CDT Thu May 21 2026

WIZ005-010>013-018-019-021-073-211300-
/O.CON.KGRB.FR.Y.0008.000000T0000Z-260521T1300Z/
Vilas-Oneida-Forest-Florence-Northern Marinette County-Lincoln-
Langlade-Northern Oconto County-Southern Marinette County-
Including the cities of Porterfield, Townsend, Crandon, Wausaukee,
Loomis, High Falls Reservoir, Lakewood, Merrill, Aurora, Harmony,
Eagle River, Spread Eagle, Mountain, Crivitz, Middle Inlet, Lac Du
Flambeau, Tomahawk, Rhinelander, Peshtigo, Commonwealth, Niagara, and
Antigo
200 AM CDT Thu May 21 2026

...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM CDT THIS MORNING...

* 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 this morning.

* 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

Kruk


Action: Area Extended
Issued At: 2026-05-21 04:20:35

826 
WWUS73 KGRB 210920
NPWGRB

URGENT - WEATHER MESSAGE
National Weather Service Green Bay WI
420 AM CDT Thu May 21 2026

WIZ011>013-211300-
/O.UPG.KGRB.FR.Y.0008.000000T0000Z-260521T1300Z/
/O.NEW.KGRB.FZ.W.0004.260521T0920Z-260521T1300Z/
Forest-Florence-Northern Marinette County-
Including the cities of Niagara, Spread Eagle, Crandon, Wausaukee,
Aurora, and Commonwealth
420 AM CDT Thu May 21 2026

...FREEZE WARNING IN EFFECT UNTIL 8 AM CDT THIS MORNING...

* WHAT...Sub-freezing temperatures as low as 28.

* WHERE...Florence, Forest, and Northern Marinette counties.

* WHEN...Until 8 AM CDT this morning.

* IMPACTS...Frost and freeze conditions could kill crops, other
  sensitive vegetation and possibly damage unprotected outdoor
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

WIZ020-022-074-211300-
/O.EXA.KGRB.FR.Y.0008.000000T0000Z-260521T1300Z/
Menominee-Door-Southern Oconto County-
Including the cities of Sturgeon Bay, Sobieski, Little Suamico,
Pensaukee, Sister Bay, Brookside, Fish Creek, Neopit, Keshena, and
Oconto
420 AM CDT Thu May 21 2026

...FROST ADVISORY IN EFFECT UNTIL 8 AM CDT THIS MORNING...

* WHAT...Temperatures as low as 34 will result in frost formation.

* WHERE...Door, Menominee, and Southern Oconto counties.

* WHEN...Until 8 AM CDT this morning.

* 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.

&&

$$

WIZ005-010-018-019-021-073-211300-
/O.CON.KGRB.FR.Y.0008.000000T0000Z-260521T1300Z/
Vilas-Oneida-Lincoln-Langlade-Northern Oconto County-Southern
Marinette County-
Including the cities of Porterfield, High Falls Reservoir, Mountain,
Crivitz, Lakewood, Middle Inlet, Lac Du Flambeau, Townsend, Harmony,
Tomahawk, Rhinelander, Loomis, Merrill, Peshtigo, Eagle River, and
Antigo
420 AM CDT Thu May 21 2026

...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM CDT THIS MORNING...

* WHAT...Temperatures as low as 30 will result in frost formation.

* WHERE...Langlade, Lincoln, Oneida, Vilas, Northern Oconto County,
  and Southern Marinette counties.

* WHEN...Until 8 AM CDT this morning.

* 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

Kruk


Action: Continued
Issued At: 2026-05-21 04:20:35

826 
WWUS73 KGRB 210920
NPWGRB

URGENT - WEATHER MESSAGE
National Weather Service Green Bay WI
420 AM CDT Thu May 21 2026

WIZ011>013-211300-
/O.UPG.KGRB.FR.Y.0008.000000T0000Z-260521T1300Z/
/O.NEW.KGRB.FZ.W.0004.260521T0920Z-260521T1300Z/
Forest-Florence-Northern Marinette County-
Including the cities of Niagara, Spread Eagle, Crandon, Wausaukee,
Aurora, and Commonwealth
420 AM CDT Thu May 21 2026

...FREEZE WARNING IN EFFECT UNTIL 8 AM CDT THIS MORNING...

* WHAT...Sub-freezing temperatures as low as 28.

* WHERE...Florence, Forest, and Northern Marinette counties.

* WHEN...Until 8 AM CDT this morning.

* IMPACTS...Frost and freeze conditions could kill crops, other
  sensitive vegetation and possibly damage unprotected outdoor
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

WIZ020-022-074-211300-
/O.EXA.KGRB.FR.Y.0008.000000T0000Z-260521T1300Z/
Menominee-Door-Southern Oconto County-
Including the cities of Sturgeon Bay, Sobieski, Little Suamico,
Pensaukee, Sister Bay, Brookside, Fish Creek, Neopit, Keshena, and
Oconto
420 AM CDT Thu May 21 2026

...FROST ADVISORY IN EFFECT UNTIL 8 AM CDT THIS MORNING...

* WHAT...Temperatures as low as 34 will result in frost formation.

* WHERE...Door, Menominee, and Southern Oconto counties.

* WHEN...Until 8 AM CDT this morning.

* 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.

&&

$$

WIZ005-010-018-019-021-073-211300-
/O.CON.KGRB.FR.Y.0008.000000T0000Z-260521T1300Z/
Vilas-Oneida-Lincoln-Langlade-Northern Oconto County-Southern
Marinette County-
Including the cities of Porterfield, High Falls Reservoir, Mountain,
Crivitz, Lakewood, Middle Inlet, Lac Du Flambeau, Townsend, Harmony,
Tomahawk, Rhinelander, Loomis, Merrill, Peshtigo, Eagle River, and
Antigo
420 AM CDT Thu May 21 2026

...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM CDT THIS MORNING...

* WHAT...Temperatures as low as 30 will result in frost formation.

* WHERE...Langlade, Lincoln, Oneida, Vilas, Northern Oconto County,
  and Southern Marinette counties.

* WHEN...Until 8 AM CDT this morning.

* 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

Kruk


Action: Upgraded
Issued At: 2026-05-21 04:20:35

826 
WWUS73 KGRB 210920
NPWGRB

URGENT - WEATHER MESSAGE
National Weather Service Green Bay WI
420 AM CDT Thu May 21 2026

WIZ011>013-211300-
/O.UPG.KGRB.FR.Y.0008.000000T0000Z-260521T1300Z/
/O.NEW.KGRB.FZ.W.0004.260521T0920Z-260521T1300Z/
Forest-Florence-Northern Marinette County-
Including the cities of Niagara, Spread Eagle, Crandon, Wausaukee,
Aurora, and Commonwealth
420 AM CDT Thu May 21 2026

...FREEZE WARNING IN EFFECT UNTIL 8 AM CDT THIS MORNING...

* WHAT...Sub-freezing temperatures as low as 28.

* WHERE...Florence, Forest, and Northern Marinette counties.

* WHEN...Until 8 AM CDT this morning.

* IMPACTS...Frost and freeze conditions could kill crops, other
  sensitive vegetation and possibly damage unprotected outdoor
  plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

&&

$$

WIZ020-022-074-211300-
/O.EXA.KGRB.FR.Y.0008.000000T0000Z-260521T1300Z/
Menominee-Door-Southern Oconto County-
Including the cities of Sturgeon Bay, Sobieski, Little Suamico,
Pensaukee, Sister Bay, Brookside, Fish Creek, Neopit, Keshena, and
Oconto
420 AM CDT Thu May 21 2026

...FROST ADVISORY IN EFFECT UNTIL 8 AM CDT THIS MORNING...

* WHAT...Temperatures as low as 34 will result in frost formation.

* WHERE...Door, Menominee, and Southern Oconto counties.

* WHEN...Until 8 AM CDT this morning.

* 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.

&&

$$

WIZ005-010-018-019-021-073-211300-
/O.CON.KGRB.FR.Y.0008.000000T0000Z-260521T1300Z/
Vilas-Oneida-Lincoln-Langlade-Northern Oconto County-Southern
Marinette County-
Including the cities of Porterfield, High Falls Reservoir, Mountain,
Crivitz, Lakewood, Middle Inlet, Lac Du Flambeau, Townsend, Harmony,
Tomahawk, Rhinelander, Loomis, Merrill, Peshtigo, Eagle River, and
Antigo
420 AM CDT Thu May 21 2026

...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM CDT THIS MORNING...

* WHAT...Temperatures as low as 30 will result in frost formation.

* WHERE...Langlade, Lincoln, Oneida, Vilas, Northern Oconto County,
  and Southern Marinette counties.

* WHEN...Until 8 AM CDT this morning.

* 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

Kruk


Action: Expired
Issued At: 2026-05-21 07:54:12

367 
WWUS73 KGRB 211253
NPWGRB

URGENT - WEATHER MESSAGE
National Weather Service Green Bay WI
753 AM CDT Thu May 21 2026

WIZ011>013-211400-
/O.EXP.KGRB.FZ.W.0004.000000T0000Z-260521T1300Z/
Forest-Florence-Northern Marinette County-
Including the cities of Dunbar, Commonwealth, Pembine, Crandon,
Niagara, Laona, Argonne, Hiles, Spread Eagle, Cavour, Aurora,
Goodman, Blackwell, and Armstrong Creek
753 AM CDT Thu May 21 2026

...FREEZE WARNING WILL EXPIRE AT 8 AM CDT THIS MORNING...

Temperatures have warmed into the upper 30s to lower 40s; therefore,
the Freeze Warning will be allowed to expire.

$$

WIZ005-010-018>022-073-074-211400-
/O.EXP.KGRB.FR.Y.0008.000000T0000Z-260521T1300Z/
Vilas-Oneida-Lincoln-Langlade-Menominee-Northern Oconto County-
Door-Southern Marinette County-Southern Oconto County-
Including the cities of Potawatomi State Park, Merrill, Institute,
Middle Inlet, Goodnow, Elcho, Antigo, Lakewood, Woodboro, Jeffris,
Pine River, Bryant, Bloomville, Pensaukee, Breed, Klondike, Presque
Isle, Conover, Neva, Crivitz, Boulder Junction, Polar, Townsend,
Keshena, Harmony, Mountain, Deerbrook, High Falls Reservoir,
Enterprise, Rhinelander, Doering, Lake Tomahawk, Lac Du Flambeau,
Peshtigo, Harrison, Porterfield, Valmy, Loomis, Manitowish Waters,
Gleason, Brookside, Starks, Little Suamico, Oconto, Kempster, Clay
Banks, Arbor Vitae, Winchester, Mc Naughton, Neopit, and Sobieski
753 AM CDT Thu May 21 2026

...FROST ADVISORY WILL EXPIRE AT 8 AM CDT THIS MORNING...

Temperatures have warmed into the upper 30s to lower 40s; therefore,
the Frost Advisory will be allowed to expire.

$$

For more information, visit us at http://www.weather.gov/GreenBay

Kurimski



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