Tornado Warning 1, NWS Duluth, MN

Area Forecast Discussion...CORRECTED
National Weather Service Duluth MN
358 PM CDT Fri Apr 17 2026

Corrected Key Messages...

.KEY MESSAGES...

- Showers and storms, some of which may be severe over northwest
  Wisconsin, will move east out of the Northland this evening.
  Large hail and damaging winds are the main threats and there is
  a small chance of a tornado.

- Colder into the weekend with breezy northwest winds. Some
  snowflakes are possible along the International Border
  Saturday afternoon.

- Warmer temperatures return next week with near-critical fire
  weather possible Monday and Wednesday.

&&

.DISCUSSION...
Issued at 353 PM CDT Fri Apr 17 2026

This afternoon through tonight...

Rain and thunderstorms will advance eastward across northeast
Minnesota and northwest Wisconsin through this evening. The
greatest severe weather risk remains over northwest Wisconsin.
Large hail and damaging wind gusts are the greatest threat. A
small risk of a brief tornado remains, though that potential is
trending lower with time. Storms have formed several broken
lines and will continue to propagate northeastward at 50-60 mph
over northwest Wisconsin.

Farther west cold temperatures at the surface and aloft may
cause a transition from rain to snow or sleet before
precipitation ends. Strong cold air advection develops behind
the front tonight leading to strong and gusty northwest winds.
Temperatures tonight will drop well below normal with lows in
the upper teens north to the upper 20s south.

Gusty northwest winds persist Saturday with well below normal
temperatures. There may be enough moisture and cold air
advection to generate spotty flurries or convective snow showers
over the Iron Range to the Canadian border and over the
Arrowhead. Highs will reach the low 30s north to around 40 in
central Minnesota and northwest Wisconsin.

Sunday through next week...

Temperatures trend warmer Sunday through the week. Southerly
winds and deep mixing may lead to near-critical fire weather
conditions Monday ahead of a dry cold front. Wednesday may be
dry and gusty as well. Precipitation chances return Thursday and
Friday.

&&

.AVIATION /18Z TAFS THROUGH 18Z SATURDAY/...
Issued at 115 PM CDT Fri Apr 17 2026

A low pressure system will move across the region this
afternoon and tonight. A cold front from near the Minnesota/
Wisconsin border to near KELO will propagate eastward this
afternoon and evening. HYR will start out with VFR conditions
descending to MVFR behind the front. Scattered showers and
thunderstorms will persist through early evening and will taper
off from west to east through tonight. Low stratus may loiter
behind the front for tonight. Winds will turn northwesterly
behind the front and will be gusty overnight and Saturday
morning. A few snow showers are possible Saturday afternoon and
evening after 18.18Z and could impact INL and HIB.

&&

.MARINE /FOR NEARSHORE WATERS OF WESTERN LAKE SUPERIOR/...
Issued at 353 PM CDT Fri Apr 17 2026

A low pressure system and cold front will propagate eastward
over the waters this afternoon and evening. Rain and
thunderstorms, some strong to severe, are forecast ahead of and
behind the front. Winds will back northwesterly and strengthen
behind the front and remain strong through Saturday night. Gales
of 35-40 knots are forecast for portions of the North Shore
tonight and Gale Warnings are in effect. Conditions will be
hazardous to small craft through Saturday evening. Quieter
conditions are forecast Sunday and Monday. Another cold front
will pass over the waters Monday night and Tuesday and could
pose a risk to small craft.

For the open water discussion, refer to the NWS Marquette Area
Forecast Discussion at weather.gov/mqt.

&&

.FIRE WEATHER...
Issued at 115 PM CDT Fri Apr 17 2026

A low pressure system and associated cold front will propagate
through the region this afternoon and tonight. Showers and
thunderstorms will gradually pass eastward through the
afternoon. A few severe storms are possible with large hail,
damaging winds, and a few tornadoes. The greatest severe weather
risk will be over northwest Wisconsin through this evening.
Precipitation may turn over to snow before ending over central
and north-central Minnesota. Saturday will feature strong and
gusty northwest winds. RH values will dip into the 30-35% range.
Temperatures begin to trend warmer on Sunday and closer to
normal on Monday. The warmer temperatures Monday and again on
Wednesday may pose a risk of near-critical fire weather
conditions due to low RH values and gusty winds.

See the Fire Weather Forecast product for a more thorough
breakdown of fire weather conditions.

&&

.DLH WATCHES/WARNINGS/ADVISORIES...
MN...None.
WI...None.
MARINE...Small Craft Advisory until 10 PM CDT Saturday for LSZ121-
     143>148.
     Gale Warning until midnight CDT tonight for LSZ140>142.
     Small Craft Advisory until 4 AM CDT Sunday for LSZ150.

&&

DISCUSSION...Huyck
AVIATION...Huyck
MARINE...Huyck
FIRE WEATHER...Huyck

Hazardous Weather Outlook
National Weather Service Duluth MN
604 AM CDT Fri Apr 17 2026

MNZ010>012-018>021-025-026-033>038-WIZ001>004-006>009-181115-
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-
604 AM CDT Fri Apr 17 2026

This Hazardous Weather Outlook is for portions of northeast
Minnesota and northwest Wisconsin.

.DAY ONE...Today and Tonight

Scattered strong to severe thunderstorms are possible this afternoon
and evening. Large hail, damaging winds, and perhaps a tornado
are all possible hazards. The Storm Prediction Center has a Slight
Risk for much of northwest WI.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Near-critical fire weather conditions are possible for all or
portions of the Northland Saturday and again Monday due to
blustery winds and low relative humidity.

.SPOTTER INFORMATION STATEMENT...

Skywarn spotters may be needed this afternoon and evening, mainly
over northwest Wisconsin.

LSZ121-140>148-150-181115-
Bayfield to Oak Point WI-Grand Portage to Grand Marais MN-
Grand Marais to Taconite Harbor MN-
Taconite Harbor to Silver Bay Harbor MN-
Silver Bay Harbor to Two Harbors MN-Two Harbors to Duluth MN-
Duluth MN to Port Wing WI-Port Wing to Sand Island WI-
Sand Island to Bayfield WI-Oak Point to Saxon Harbor WI-
Outer Apostle Islands Beyond 5 NM from Mainland-
604 AM CDT Fri Apr 17 2026

This Hazardous Weather Outlook is for portions of Lake Superior
and the Nearshore waters of western Lake Superior.

.DAY ONE...Today and Tonight

Scattered thunderstorms are possible this afternoon and evening.
Some storms could be strong to severe.

Gusty northwesterly winds are forecast starting this evening and
overnight tonight. Gale Warnings and Small Craft Advisories have
been issued for late this afternoon and tonight.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Gusty northwesterly winds are likely Saturday and Saturday night.
Small Craft Advisories are in effect through Saturday night.

LE

More information may be obtained at the following web address:
http://www.weather.gov/duluth

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Preliminary Local Storm Report
National Weather Service Duluth MN
336 PM CDT Fri Apr 17 2026

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

0312 PM     Hail             2 ENE Two Harbors       47.05N 91.63W
04/17/2026  M1.00 Inch       Lake               MN   Public

            Report via social media.

&&

JJM

Preliminary Local Storm Report
National Weather Service Duluth MN
340 PM CDT Fri Apr 17 2026

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

0245 PM     Hail             1 E Esko                46.71N 92.35W
04/17/2026  M0.50 Inch       Carlton            MN   Trained Spotter

&&

JJM

Preliminary Local Storm Report
National Weather Service Duluth MN
401 PM CDT Fri Apr 17 2026

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

0340 PM     Marine Tstm Wind 1 N Port Wing           46.79N 91.39W
04/17/2026  M40 MPH          Bayfield           WI   Mesonet

            PNGW3 Port Wing.

&&

JJM

Preliminary Local Storm Report
National Weather Service Duluth MN
402 PM CDT Fri Apr 17 2026

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

0353 PM     Tstm Wnd Gst     3 SW Ashland            46.55N 90.92W
04/17/2026  M54 MPH          Ashland            WI   ASOS

            ASOS station KASX Ashland Airport.

&&

JJM