Ruby Junction, Minnesota Weather Forecast Discussion

779
FXUS63 KDLH 221128
AFDDLH
Area Forecast Discussion
National Weather Service Duluth MN
628 AM CDT Mon Sep 22 2025
.KEY MESSAGES...
- There is a chance for afternoon showers and thunderstorms
  Monday, mainly over the Arrowhead and portions of northwest
  Wisconsin.
- After the fog this morning dissipates, additional rounds of
  overnight fog are possible again tonight into Tuesday morning,
  and again Tuesday night into Wednesday morning. Additional
  Dense Fog Advisories may be needed.
- Largely dry with above normal temperatures Tuesday and
  beyond.
&&
.DISCUSSION...
Issued at 400 AM CDT Mon Sep 22 2025
The cut off low which has brought several days of clouds,
scattered rain showers, a few rumbles of thunder, fog, damp and
cool conditions will finally slide off to our east today. An
area of rain showers currently over east-central MN and western
WI will affect a few of our counties in northwest WI today,
though we may get a lull about mid-day before more showers pop
up over parts of NW WI and the MN Arrowhead for this afternoon.
Farther west, from the Brainerd lakes north through the
International Falls area, there should be quite a bit of
sunshine this afternoon, with slightly warmer temperatures in
the low 70s, vs the 60s to around 70 for areas with more clouds.
Dense fog formed around the Twin Ports and up the North Shore
last evening, and expanded rapidly overnight to a large portion
of the forecast area this morning. It seems the fog around the
Twin Ports and up the North Shore is advection/terrain induced,
with much of the remaining area getting radiational fog. This
radiational fog should burn off more quickly in the morning than
the advection fog, so the Advisory for areas away from Lake
Superior extend until 16z this morning, with areas closer to the
lake continuing until 17z or even 18z depending on location.
Unfortunately, this pattern repeats again tonight, with areas of
fog, and guidance indicates it will be dense once again. We may
need additional Dense Fog Advisories once again tonight.
The forecast becomes much quieter and gradually warms up through
the work week with high temperatures rising in the low to mid
70s for a large part of the area for Wednesday and Thursday.
There is a surface ridge and upper level ridging that will
produce that quiet weather through at least Wednesday. There is
an upper level shortwave and trough axis that should slide
through the forecast area Thursday night into Friday, followed
by another Friday night into Saturday. However, there is enough
uncertainty in the timing and strength of these waves and how
much moisture they may have with them that the forecast remains
effectively dry for now.
&&
.AVIATION /12Z TAFS THROUGH 12Z TUESDAY/...
Issued at 628 AM CDT Mon Sep 22 2025
Fog and stratus has developed over the terminals this morning,
with LIFR/VLIFR conditions and will linger through approximately
15z, 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 most sites
are expected to dip to LIFR for several hours during the early
morning. Winds for this TAF period to remain less than 5kts.
&&
.MARINE /FOR NEAR SHORE WATERS OF WESTERN LAKE SUPERIOR/...
Issued at 400 AM CDT Mon Sep 22 2025
Light northeast winds of 5 to 10 knots this morning are expected
to continue through Tuesday night before backing into the north
on Wednesday, remaining light. There may be some afternoon gusts
which approach 15 knots. These light winds and lingering
moisture from the last few days is going to contribute to
persistent fog over western Lake Superior today and tonight.
There may be a few hours, mainly during the afternoon where
visibilities improve to a mile or better, but the fog will close
back in once we get cooler in the evening. A Dense Fog Advisory
has been issued for all the nearshore waters through Tuesday
morning. This pattern may repeat once again Tuesday night 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-
     018-019-025-026-033>036.
     Dense Fog Advisory until 1 PM CDT this afternoon for MNZ020-
     021.
     Dense Fog Advisory until noon CDT today for MNZ037.
WI...Dense Fog Advisory until noon CDT today for WIZ001>004.
MARINE...Dense Fog Advisory until 10 AM CDT Tuesday for LSZ121-140>148-
     150.
&&
$$
DISCUSSION...LE
AVIATION...LE
MARINE...LE

NWS DLH Office Area Forecast Discussion