Hazard Report Provided By forecast.weather.gov

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.

$$

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

Flood Advisory
National Weather Service Duluth MN
129 PM CDT Tue May 19 2026

.High water continues across portions of the far eastern Rainy River
watershed due to the effects of runoff from heavy rains and snowmelt
from late April into early May.

MNC075-137-222045-
/O.EXT.KDLH.FA.Y.0008.000000T0000Z-260522T2045Z/
/00000.N.RS.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lake MN-St. Louis MN-
129 PM CDT Tue May 19 2026

...FLOOD ADVISORY NOW IN EFFECT UNTIL 345 PM CDT FRIDAY...

* WHAT...Flooding caused by rain and snowmelt continues.

* WHERE...In Minnesota, Lake and St. Louis Counties.

* WHEN...Until 345 PM CDT Friday.

* IMPACTS...Minor flooding in low-lying and poor drainage areas.
  Some low-water crossings may become impassable. River or stream
  flows are elevated.

* ADDITIONAL DETAILS...
  - At 126 PM CDT Tuesday, Minor flooding and high water levels
    are already occurring.
  - This includes the following streams and drainages...
    Oyster River, Ge-be-on-e-quet Creek, Horse River, Shohola
    Creek, Hustler River, Moose River, Jeanette Creek, Wolfpack
    Creek, Nugget Creek, Heritage Creek, Portage River, Range
    Line Creek and Legend Creek.

  - Some locations that will experience flooding include...
    Basswood Lake, northwestern Boundary Waters Canoe Area
    Wilderness, Lake Agnes, Crooked Lake, Fourtown Lake, Lac la
    Croix, Lac La Croix and Loon Lake.

  - Flood safety information can be found at
    www.weather.gov/safety/flood.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Campers and hikers should avoid flooded trail crossings. If camping
at a site along or near the banks of rivers or streams, move away
from those locations and seek higher ground. Trails in hilly terrain
can quickly become unstable during or shortly after heavy rainfall.

Portage and hiking trails may be impassable and low-lying campsites
may be inundated with excessive runoff in this section of the
Boundary Waters as flooding is occurring or imminent.

Report observed flooding to local emergency services or law
enforcement and to the National Weather Service in Duluth when you
can do so safely. Flooding can be reported to the National Weather
Service at 1-800-685-8612.

&&

LAT...LON 4827 9201 4823 9196 4820 9179 4820 9172
      4811 9171 4811 9165 4810 9164 4811 9156
      4807 9158 4804 9157 4798 9172 4816 9218
      4817 9235 4821 9238 4825 9227 4834 9229
      4836 9206 4830 9201


$$

LE

Hazard Report Provided By forecast.weather.gov