606
FXUS63 KDLH 260818
AFDDLH

Area Forecast Discussion
National Weather Service Duluth MN
318 AM CDT Thu Sep 26 2024

.KEY MESSAGES...

- Warm and dry weather persists through Monday.

- Early morning fog today dissipated by mid-morning.

- A cold front drops is forecast to move through the area Monday
  night into Tuesday to drop temperatures to seasonable and
  produce a 10-30% chance of scattered rain showers.

- Frost is possible (40% chance) Tuesday night with temperatures
  in the mid to low-30s forecast.

&&

.DISCUSSION...
Issued at 310 AM CDT Thu Sep 26 2024

Infrared satellite imagery Thursday morning shows patchy fog
slowly drifting southward through inland northwest Wisconsin,
while surface observations showing reduced visibility from very
localized fog development elsewhere in the Northland. Although a
lone spot of 1/4 mile dense fog cannot be entirely ruled out.

Warm southerly airmass under high pressure ridging keeps well-
above normal temperatures in place for today through Monday. Dry
weather is also forecast in this time period, even as a weak dry
cool front crosses over the Upper Midwest Friday daytime.

A more potent cold front is forecast to drop southward Monday
afternoon and cross over the Northland Monday night into
Tuesday. While fairly moisture-limited, a 10-30% chance of
scattered rain showers continues in the forecast for this time
period, but widespread light to moderate rainfall is not
expected at this time.

The trailing colder airmass that sets up behind the front,
finally, drops temperatures to near normal in the upper-50s to
around 60 F for Tuesday. By Tuesday night as winds drop off
with the trough well to the east and the pressure gradient
decreasing, that colder airmass is progged to create another
period of fairly widespread frost potential (40% chance) as
overnight temperatures Tuesday night into Wednesday dip into the
low to mid-30s in spots.

Daytime temperatures in the low to mid-60s then return for the
middle of next week as high pressure again builds back in.

&&

.AVIATION /06Z TAFS THROUGH 06Z FRIDAY/...
Issued at 1227 AM CDT Thu Sep 26 2024

Localized fog in northwest Wisconsin presently is expected to
expand in coverage across the state and eventually for as well
in northeast Minnesota into 08-10Z this morning. Forecast
remains for IFR to MVFR visibilities at area terminals through
13Z today. Southerly winds increase in speed across north-
central Minnesota after 16Z today, mainly affecting BRD and INL
into this evening. Outside of morning fog, VFR conditions.

&&

.MARINE /FOR NEAR SHORE WATERS OF WESTERN LAKE SUPERIOR/...
Issued at 254 AM CDT Thu Sep 26 2024

High pressure ridge keeps winds under 15 knots today, with
easterly winds into the head of the lake building waves to 1
foot this afternoon and early evening. Winds shift southwesterly
late Friday as a very weak cold front passes over the region
during the daytime.

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...NLy
AVIATION...NLy
MARINE...NLy