Duluth, Minnesota 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

418
FXUS63 KDLH 152346
AFDDLH

Area Forecast Discussion
National Weather Service Duluth MN
646 PM CDT Sun Mar 15 2026

.KEY MESSAGES...

- Moderate to heavy snow with occasional blizzard conditions
  will continue in northwest Wisconsin tonight, especially in
  Iron/Ashland counties.

- Cold weather is expected through Tuesday. Wind chills in the
  teens to 20s below zero are expected Monday morning.

- A quick-hitting system may bring an inch or two of snow for
  some places Tuesday afternoon and evening.

- A notable warmup back to spring weather is expected late-week
  with highs in the 40s to low 50s.

&&

.DISCUSSION...
Issued at 327 PM CDT Sun Mar 15 2026

Current Conditions:
Well, it`s snowing and blowing out there, though not at the
intensity we were anticipating at this time yesterday for most
places. The storm has taken more of a southerly track, keeping
the big 20"+ snow reports down towards Wausau. Dry air has kept
the Iron Range and north of the Brainerd Lakes dry today.

Headline Changes and Tonight`s Forecast:
We have seen some gusty winds out there and some occasional
visibility below a mile, but generally we haven`t see the
widespread blizzard conditions we were expecting. Therefore,
most Blizzard Warnings have been downgraded to Winter Storm
Warnings. The only reason for keeping warnings instead of
downgrading to advisories is that lake-effect snow has been
persistent from Carlton county on east along the South Shore,
and as winds continue to turn more northerly, the lake-effect is
expected to persist and perhaps extend a bit further inland for
a while this evening. Couple this with strong winds, and wintry
conditions should prevail into the evening. Once the bulk of the
lake-effect moves out of Carlton/Pine counties later this
afternoon, we may be able to downgrade those areas to an
advisory or even cancel altogether.

For now, with winds expected to further increase slightly in-
tandem with snowfall rates increasing due to lake and terrain
enhancement in Ashland/Iron counties, we will keep the Blizzard
Warning going. Additional snowfall over there from around 6 to
12 inches is not out of the question along the Penokee ridge,
though amounts and impacts will be less away from there. We will
hold on to Price County for now as well with the possibility for
more accumulating snow to make its way to the eastern and
northern part of the county overnight, both lake-effect and
synoptic, which will combine with the strong winds to reduce
visibility.

Outside of northwest Wisconsin, the snow is expected to wrap up
this evening with quickly improving conditions (though winds
will remain gusty tonight, so there will probably be some
areas of blowing snow).

North Shore High Winds Tonight:
There is a ~70% probability of seeing wind gusts to around 60
mph around Grand Marais tonight. With such cold air streaming in
from the northwest, there`s enough confidence to upgrade the
previous Wind Advisory to a High Wind Warning there. High winds
will be most likely from about 2 AM to 10 AM, then expect winds
to decrease gradually in the afternoon after that.

Monday-Tuesday Forecast - Wrapping up the storm and cold
weather:

Moderate to heavy wraparound snow along the northwest side of
the low-pressure center will keep the snow ongoing in the UP,
and it may graze eastern Price/Iron counties during the morning,
combining with some lingering lake-enhancement in Ashland/Iron
counties. Lake-effect is likely to persist into Monday afternoon
and night for Iron and possibly Ashland counties with plenty of
cold air advection, though drier air moving in should
dramatically reduce the intensity to light snow showers.

High pressure passing by to the south Monday night with pretty
strong cold air advection will create favorable conditions for a
cold Monday morning. Wind chills in the teens to 20s below zero
are expected Monday morning with blustery winds persisting, then
temperatures below zero and wind chills in the teens below zero
Tuesday morning.

Tuesday clipper:
As high pressure departs on Tuesday, a quick clipper is expected
to pass through and bring around an inch or two of snow to parts
of the Northland. This will be most likely around the Brainerd
Lakes as of now, and timing is likely to be during the afternoon
and evening.

Mid to late week warmup:
Strong ridging across the western CONUS will infiltrate the
Northland with warm southwesterly flow developing on Wednesday
post-clipper. It`s looking like a relatively toasty end to the
week with highs in the 40s and even some 50s. We will still see
lows below freezing, so there will be a freeze/thaw cycle and
plenty of frozen surfaces at night and during the morning. We
could have some more weak clippers Friday and into the weekend
riding along the ridge, which could be in the form of light rain
or snow depending on what time of day/night the precipitation
passes through.

&&

.AVIATION /00Z TAFS THROUGH 00Z TUESDAY/...
Issued at 646 PM CDT Sun Mar 15 2026

A narrow, convergent band of snow from Two Harbors has been
producing IFR conditions with some occasional LIFR visibilities
for locations it sets up over. Luckily, the worst conditions
with this snow band have been just southeast of the DLH
terminal. Expect this band to shift into northwest Wisconsin
later this evening into tonight as winds shift northerly.
Additionally, lake-enhanced snow streamers will produce IFR to
LIFR visibility and MVFR ceilings for HYR and much of northwest
Wisconsin this evening, with gradually improving conditions at
HYR later tonight as snow shifts into north-central Wisconsin,
though ceilings should remain MVFR there. At most terminals,
cold air advection behind the departing storm may result in some
SCT to BKN low clouds with low-VFR to near-MVFR ceilings this
evening into tonight, though have hedged towards VFR for now as
MVFR ceiling probabilities have been decreasing with those low
clouds. Winds will be gusty at all terminals from this evening
through Monday afternoon, with winds weakening Monday evening
and night. Off and on blowing snow continues with these winds at
terminals that saw at least a couple inches of snow into
tonight, namely at BRD/HYR/DLH.

&&

.MARINE /FOR NEARSHORE WATERS OF WESTERN LAKE SUPERIOR/...
Issued at 327 PM CDT Sun Mar 15 2026

Gales and heavy freezing spray are expected into Monday, along
with storm force winds from around Grand Marais to Grand
Portage. Wave heights over 10 ft are expected into Monday as
well, especially along the South Shore. Winds will gradually
decrease Monday night, and Small Craft Advisories will be
needed. Winds will become lighter on Tuesday as high pressure
passes by to the south. Expect snow to continue now through
Monday as well, especially along the South Shore.

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

&&

.DLH WATCHES/WARNINGS/ADVISORIES...
MN...Wind Advisory until 2 PM CDT Monday for MNZ020.
     High Wind Warning until 2 PM CDT Monday for MNZ021.
     Winter Storm Warning until 10 PM CDT this evening for MNZ037-
     038.
WI...Winter Storm Warning until 1 AM CDT Monday for WIZ001-006-007.
     Winter Storm Warning until 4 AM CDT Monday for WIZ002-008.
     Blizzard Warning until 1 PM CDT Monday for WIZ003-004.
     Blizzard Warning until 7 AM CDT Monday for WIZ009.
MARINE...Gale Warning until 7 PM CDT this evening for LSZ140.
     Heavy Freezing Spray Warning until 4 PM CDT Monday for
     LSZ140>142-147-148-150.
     Storm Warning until 4 PM CDT Monday for LSZ140.
     Gale Warning until 1 AM CDT Tuesday for LSZ141.
     Gale Warning until 4 PM CDT Monday for LSZ142-147-148-150.
     Wind Advisory until 2 PM CDT Monday for LSZ142.
     Gale Warning until noon CDT Monday for LSZ143>146.
     Heavy Freezing Spray Warning until noon CDT Monday for
     LSZ143>146.

&&

$$

DISCUSSION...JDS
AVIATION...Rothstein
MARINE...JDS