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Home Return to list Frost Advisory 0005 Issued by the Duluth Forecast Office
Action: New Issued At: 2026-05-20 14:12:56 052 WWUS73 KDLH 201912 NPWDLH URGENT - WEATHER MESSAGE National Weather Service Duluth MN 212 PM CDT Wed May 20 2026 MNZ012-019>021-037-WIZ001>004-008-009-210715- /O.NEW.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 Superior, Two Harbors, Washburn, Duluth, Ashland, Hayward, Silver Bay, Isabella, Hibbing, Phillips, Bayfield, Hurley, and Grand Marais 212 PM CDT Wed May 20 2026 ...FROST ADVISORY 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 Bois Forte Band, Lake Vermilion area, the Lac Courte Oreilles Reservation, the Fond du Lac Band, the Grand Portage Reservation, the Bad River Reservation, the Red Cliff Band and the northwestern area of the Lac du Flambeau Band. 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. && $$ For more information on Northland weather, visit www.weather. gov/duluth BJH Action: Continued Issued At: 2026-05-20 21:36:12 063 WWUS73 KDLH 210235 NPWDLH URGENT - WEATHER MESSAGE National Weather Service Duluth MN 935 PM CDT Wed May 20 2026 MNZ012-019>021-037-WIZ001>004-008-009-211300- /O.CON.KDLH.FR.Y.0005.260521T0600Z-260521T1300Z/ Northern Cook and Lake-Central St. Louis-Southern Lake-Southern Cook-Carlton and South St. Louis-Douglas-Bayfield-Ashland-Iron- Sawyer-Price- Including the cities of Hurley, Hibbing, Hayward, Isabella, Two Harbors, Superior, Washburn, Duluth, Ashland, Grand Marais, Bayfield, Silver Bay, and Phillips 935 PM CDT Wed May 20 2026 ...FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 8 AM CDT THURSDAY... * WHAT...Temperatures as low as 32 will result in frost formation. * WHERE...In Minnesota, Carlton, South and Central St. Louis, Cook and Lake Counties. In Wisconsin, Price, Ashland, Bayfield, Douglas, Iron, and Sawyer Counties. This includes the Tribal Lands of the northwestern area of the Lac du Flambeau Band, the Fond du Lac Band, the Bad River Reservation, the Bois Forte Band, Lake Vermilion area, the Red Cliff Band, the Lac Courte Oreilles Reservation and the Grand Portage Reservation. Other locations including Madeline Island and the Apostle Islands National Lakeshore. This also includes the Boundary Waters eastern and central area. * WHEN...From 1 AM to 8 AM CDT Thursday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ For more information on Northland weather, visit www.weather. gov/duluth LE Action: Continued Issued At: 2026-05-21 02:14:18 275 WWUS73 KDLH 210714 NPWDLH URGENT - WEATHER MESSAGE National Weather Service Duluth MN 214 AM CDT Thu May 21 2026 MNZ012-020-021-WIZ003-004-211300- /O.UPG.KDLH.FR.Y.0005.000000T0000Z-260521T1300Z/ /O.NEW.KDLH.FZ.W.0002.260521T0714Z-260521T1300Z/ Northern Cook and Lake-Southern Lake-Southern Cook-Ashland-Iron- Including the cities of Silver Bay, Hurley, Grand Marais, Ashland, Two Harbors, and Isabella 214 AM CDT Thu May 21 2026 ...FREEZE WARNING IN EFFECT UNTIL 8 AM CDT THIS MORNING... * WHAT...Sub-freezing temperatures as low as 27. * WHERE...In Minnesota, Cook and Lake Counties. In Wisconsin, Ashland and Iron Counties. This includes the Tribal Lands of the northwestern area of the Lac du Flambeau Band, the Grand Portage Reservation and the Bad River Reservation. Other locations including Madeline Island. This also includes the Boundary Waters eastern and central area. * 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. && $$ MNZ019-037-WIZ001-002-008-009-211300- /O.CON.KDLH.FR.Y.0005.000000T0000Z-260521T1300Z/ Central St. Louis-Carlton and South St. Louis-Douglas-Bayfield- Sawyer-Price- Including the cities of Hibbing, Superior, Washburn, Duluth, Bayfield, Hayward, and Phillips 214 AM CDT Thu May 21 2026 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM CDT THIS MORNING... * WHAT...Temperatures as low as 31 will result in frost formation. * WHERE...In Minnesota, Carlton and South and Central St. Louis Counties. In Wisconsin, Price, Bayfield, Douglas, and Sawyer Counties. This includes the Tribal Lands of the Lac Courte Oreilles Reservation, the Fond du Lac Band, the Bois Forte Band, Lake Vermilion area and the Red Cliff Band. Other locations including the Apostle Islands National Lakeshore. * WHEN...Until 8 AM CDT this morning. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ For more information on Northland weather, visit www.weather. gov/duluth KML Action: Upgraded Issued At: 2026-05-21 02:14:18 275 WWUS73 KDLH 210714 NPWDLH URGENT - WEATHER MESSAGE National Weather Service Duluth MN 214 AM CDT Thu May 21 2026 MNZ012-020-021-WIZ003-004-211300- /O.UPG.KDLH.FR.Y.0005.000000T0000Z-260521T1300Z/ /O.NEW.KDLH.FZ.W.0002.260521T0714Z-260521T1300Z/ Northern Cook and Lake-Southern Lake-Southern Cook-Ashland-Iron- Including the cities of Silver Bay, Hurley, Grand Marais, Ashland, Two Harbors, and Isabella 214 AM CDT Thu May 21 2026 ...FREEZE WARNING IN EFFECT UNTIL 8 AM CDT THIS MORNING... * WHAT...Sub-freezing temperatures as low as 27. * WHERE...In Minnesota, Cook and Lake Counties. In Wisconsin, Ashland and Iron Counties. This includes the Tribal Lands of the northwestern area of the Lac du Flambeau Band, the Grand Portage Reservation and the Bad River Reservation. Other locations including Madeline Island. This also includes the Boundary Waters eastern and central area. * 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. && $$ MNZ019-037-WIZ001-002-008-009-211300- /O.CON.KDLH.FR.Y.0005.000000T0000Z-260521T1300Z/ Central St. Louis-Carlton and South St. Louis-Douglas-Bayfield- Sawyer-Price- Including the cities of Hibbing, Superior, Washburn, Duluth, Bayfield, Hayward, and Phillips 214 AM CDT Thu May 21 2026 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM CDT THIS MORNING... * WHAT...Temperatures as low as 31 will result in frost formation. * WHERE...In Minnesota, Carlton and South and Central St. Louis Counties. In Wisconsin, Price, Bayfield, Douglas, and Sawyer Counties. This includes the Tribal Lands of the Lac Courte Oreilles Reservation, the Fond du Lac Band, the Bois Forte Band, Lake Vermilion area and the Red Cliff Band. Other locations including the Apostle Islands National Lakeshore. * WHEN...Until 8 AM CDT this morning. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ For more information on Northland weather, visit www.weather. gov/duluth KML Action: Expired Issued At: 2026-05-21 07:59:42 567 WWUS73 KDLH 211259 NPWDLH URGENT - WEATHER MESSAGE National Weather Service Duluth MN 759 AM CDT Thu May 21 2026 MNZ012-020-021-WIZ003-004-211400- /O.EXP.KDLH.FZ.W.0002.000000T0000Z-260521T1300Z/ Northern Cook and Lake-Southern Lake-Southern Cook-Ashland-Iron- Including the cities of Silver Bay, Two Harbors, Hurley, Grand Marais, Ashland, and Isabella 759 AM CDT Thu May 21 2026 ...FREEZE WARNING WILL EXPIRE AT 8 AM CDT THIS MORNING... The threat has ended. $$ MNZ019-037-WIZ001-002-008-009-211400- /O.EXP.KDLH.FR.Y.0005.000000T0000Z-260521T1300Z/ Central St. Louis-Carlton and South St. Louis-Douglas-Bayfield- Sawyer-Price- Including the cities of Washburn, Hibbing, Bayfield, Superior, Duluth, Phillips, and Hayward 759 AM CDT Thu May 21 2026 ...FROST ADVISORY WILL EXPIRE AT 8 AM CDT THIS MORNING... Temperatures have warmed and frost is no longer expected. $$ For more information on Northland weather, visit www.weather. gov/duluth Wolfe | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||