677
FXUS63 KDLH 301809
AFDDLH

Area Forecast Discussion
National Weather Service Duluth MN
109 PM CDT Sat Aug 30 2025

.KEY MESSAGES...

- Warm weather with sunshine through Labor Day with areas of
  fog overnight.

- Widespread rain with a mid-week system. Thunderstorms are
  possible Tuesday and Tuesday night.

- Cooler temperatures expected Wednesday through the rest of the
  week. Frost Advisories may eventually be needed.

&&

.DISCUSSION...
Issued at 110 PM CDT Sat Aug 30 2025

Expect a pleasant weekend with slightly warmer than normal
temperatures in the 70s and 80s. Areas of fog are likely to
develop each night and persist into the morning hours,
potentially impacting travel.

The risk for showers and thunderstorms will increase late Monday
ahead of a cold front set to arrive on Tuesday. This slow moving
front will bring widespread rainfall (perhaps up to 1 of rainfall
in some places) and a period of showers and thunderstorms, a few
of which could become strong, marking the most significant weather
event of the week before exiting Wednesday. CAPE and shear profiles
with this are fairly meager, but height falls aloft will aid in
forcing in concert with the front. Similar to a winter system,
wrap around showers will linger into Thursday and possibly Friday
as the upper low slowly meanders east.

A dramatic shift to much colder, autumnal weather accompanies the
air mass behind the front which will linger through the end of the
week. High temperatures will plummet into the 50s and low 60s. The
primary impact will be the overnight cold, with temperatures widely
dropping into the 30s. This will likely necessitate Frost Advisories
for inland locations away from Lake Superior. The air mass will
be cold enough that the first wet snowflakes of the season may
mix with rain showers overnight, particularly across the higher
terrain of the Northland. This cool, unsettled pattern is expected
to continue until a warming trend returns late next weekend.

&&

.AVIATION /18Z TAFS THROUGH 18Z SUNDAY/...
Issued at 1236 PM CDT Sat Aug 30 2025

VFR with local pockets of IFR ceilings from mixing out of the
boundary layer this morning. Expect VFR cumulus today with a
return of some fog tonight with the highest probably at the
southern TAF sites (KHYR & KBRD and to some degree KDLH and
KHIB) though good radiational cooling could cause some fog to
develop just about anywhere.

&&

.MARINE /FOR NEAR SHORE WATERS OF WESTERN LAKE SUPERIOR/...
Issued at 110 PM CDT Sat Aug 30 2025

High pressure will remain in place over the region for the next
few days. This will keep winds generally less than 10 knots
from the southwest. A cold front is forecast to move
southeastward across western Lake Superior on Tuesday. Showers
and thunderstorms are expected with the front and winds will
veer northwesterly and increase in speed behind the front.
Conditions will become hazardous for small craft for the latter
half of next week.

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

&&

.DLH WATCHES/WARNINGS/ADVISORIES...
MN...None.
WI...None.
MARINE...None.

&&

$$

DISCUSSION...Wolfe
AVIATION...Wolfe
MARINE...Wolfe