Soudan, Minnesota Weather Forecast Discussion

179
FXUS63 KDLH 230730
AFDDLH
Area Forecast Discussion
National Weather Service Duluth MN
230 AM CDT Tue Sep 23 2025
.KEY MESSAGES...
- After the fog this morning dissipates, additional rounds of
  overnight fog are possible again tonight into Wednesday
  morning. Additional Dense Fog Advisories may be needed.
- Mostly dry with above normal temperatures are expected
  Tuesday and beyond.
&&
.DISCUSSION...
Issued at 230 AM CDT Tue Sep 23 2025
Dense fog is the main concern the next few days as a ridge of
high pressure settles into the forecast area through Wednesday.
Fog has developed over a large portion of the area this morning,
with visibilities ranging from a quarter mile or less, to
around a mile where the fog has developed, and we have issued a
Dense Fog Advisory for a large portion of the forecast area
through 10 AM Tuesday. With plenty of moisture lingering over
the area and light winds with the ridge of high pressure, I
expect we will be dealing with fog once again tonight, and we
may need additional Dense Fog Advisories once again tonight into
Wednesday morning, and perhaps once again Wednesday night into
Thursday morning.
The forecast becomes much quieter and gradually warms up
through the rest of the work week with high temperatures rising
in the mid to upper 70s for a large part of the area for
Wednesday and Thursday. Our warmest day this week is likely to
be Thursday. There is a surface ridge and upper level ridging
that will produce that quiet weather through at least Wednesday.
After that, there is a series of upper level shortwaves that
pass across the region Thursday through the weekend. These
appear dry for the most part, but we have some slight pops
Friday night with a stronger wave as it moves across the area.
&&
.AVIATION /06Z TAFS THROUGH 06Z WEDNESDAY/...
Issued at 1254 AM CDT Tue Sep 23 2025
Fog and stratus has developed over the terminals, with
conditions ranging from IFR to VLIFR are expected to linger
overnight and through approximately 14z, followed by gradually
improving conditions through the rest of the morning and early
afternoon. With a lot of lingering moisture, conditions will
deteriorate again this evening, with IFR conditions developing
once again after 03z, and another night of LIFR/VLIFR conditions
expected. Winds for this TAF period to remain less than 5kts.
&&
.MARINE /FOR NEAR SHORE WATERS OF WESTERN LAKE SUPERIOR/...
Issued at 230 AM CDT Tue Sep 23 2025
Light northeast winds of 5 to 10 knots this morning are expected
to continue today before backing into the north on tonight into
Wednesday, then becoming light and variable Wednesday night
before becoming southwest and increasing slightly on Thursday.
There may be some afternoon gusts each day which approach 15
knots. Waves remain generally 1 foot or less through Thursday.
These light winds and lingering moisture have produced fog over
western Lake Superior this morning, which should improve
significantly for this afternoon and early evening. There may be
another round of fog tonight as temperatures drop off tonight
into Wednesday morning.
For the open water discussion, refer to the NWS Marquette Area
Forecast Discussion at weather.gov/mqt.
&&
.DLH WATCHES/WARNINGS/ADVISORIES...
MN...Dense Fog Advisory until 11 AM CDT this morning for MNZ010>012-
     018>021-025-026-033>038.
WI...Dense Fog Advisory until 11 AM CDT this morning for WIZ001>004-
     006>008.
MARINE...Dense Fog Advisory until 10 AM CDT this morning for LSZ121-
     140>148-150.
&&
$$
DISCUSSION...LE
AVIATION...LE
MARINE...LE

NWS DLH Office Area Forecast Discussion