275
FXUS63 KDLH 250022
AFDDLH

Area Forecast Discussion
National Weather Service Duluth MN
722 PM CDT Sun Aug 24 2025

.KEY MESSAGES...

- Frost Advisory for the Borderlands, Arrowhead and Iron Range
  of Minnesota late tonight into Monday morning.

- Frost potential will expand across a greater portion of
  northeast Minnesota and northwest Wisconsin Monday night into
  Tuesday morning.

- For late this week and into the weekend, generally quiet
  weather is expected with high temperatures trending a bit
  below normal in the lower to mid 70s.

&&

.DISCUSSION...
Issued at 121 PM CDT Sun Aug 24 2025

A cool late August night is expected tonight across the
Northland, with good radiational cooling. Low level cloud cover
will decrease from north to south late this afternoon and into
the evening, with decreasing winds tonight as well as the
pressure gradient wanes. When coupled with a cool start to the
evening to begin with, widespread low temperatures in the upper
30s to the lower 40s are forecast, which is closer to the cooler
edge of guidance supported by statistical MOS given good
radiational cooling. The greatest potential for frost is across
the Borderlands, Arrowhead and Iron Range of northeast
Minnesota. Expanded the Frost Advisory to include central St.
Louis county, in addition to Koochiching, and interior Lake and
Cook counties for tonight into Monday morning. An expansion of
the Frost Advisory is possible, a 20 to 40 percent chance,
depending on trends through the evening. A couple points to
watch will be how quickly winds decrease and whether any
additional cloud decks move across the area in cyclonic flow.

Sunny and seasonably cool conditions are forecast on Monday with
high temperatures in the 60s with surface high pressure. Frost
will be a concern across a greater portion of the Northland
Monday night into Tuesday morning with a good radiational
cooling setup with cool and dry high pressure at the surface.

A cold front will move across the region Wednesday and Wednesday
night, bringing rain showers and perhaps a few thunderstorms
back into the forecast. Given modest buoyancy, severe weather
is not expected. Thereafter, northeast Minnesota and northwest
Wisconsin will be under a rather diffuse upper level pattern
between weak troughing across the east coast and modest ridging
across the west. The end result will be high temperatures
likely favoring a bit below normal in the low to mid 70s, with
precipitation potential having low predictability due to a wide
range of solutions of the timing and location of the shortwaves
in the diffuse upper level pattern.

&&

.AVIATION /18Z TAFS THROUGH 18Z TUESDAY/...
Issued at 553 PM CDT Sun Aug 24 2025

Ceilings in stratus and stratocumulus have mostly risen to VFR,
though there are still a few pockets of MVFR ceilings in
northwest Wisconsin. Isolated showers and sprinkles as well for
KHIB/KDLH/KHYR, though these showers and clouds will clear from
north to south as this evening progresses and surface high
pressure slides into the region. Northwest winds with gusts of
15-20 kt will also drop off this evening around sunset, becoming
light overnight. VFR conditions then persist through Monday
with some VFR diurnal cumulus development in the late morning
through early evening along with daytime winds out of the
northwest at 7-11 kt with gusts to 15-20 kt.

&&

.MARINE /FOR NEAR SHORE WATERS OF WESTERN LAKE SUPERIOR/...
Issued at 712 PM CDT Sun Aug 24 2025

Breezy northwest winds continue through tonight, strongest up
to around 20-25 kt with waves of 3 to 4 feet in the Outer
Apostle Islands through late this evening where a Small Craft
Advisory is in effect until 11 PM CDT. All other Small Craft
Advisories dropped off at 7 PM CDT. Expect winds and waves to
gradually subside into Monday with mostly clear skies with
northwest winds of 5 to 10 kt with gusts of 15 kt or less. Waves
will become 1 ft or less on Monday afternoon.

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

&&

.DLH WATCHES/WARNINGS/ADVISORIES...
MN...Frost Advisory from 2 AM to 8 AM CDT Monday for MNZ010>012-019.
WI...None.
MARINE...Small Craft Advisory until 11 PM CDT this evening for LSZ150.

&&

$$

DISCUSSION...PA
AVIATION...Rothstein
MARINE...Rothstein