221
FXUS63 KDLH 081134
AFDDLH

Area Forecast Discussion
National Weather Service Duluth MN
634 AM CDT Sat Aug 8 2026

.KEY MESSAGES...

- Patchy dense fog possible early this morning, mainly for
  northwest Wisconsin.

- For this weekend and into next week, temperatures will be
  near to below normal across the Northland with high
  temperatures in the 70s and 80s with sporadic, near daily
  chances for rain showers and thunderstorms.

- Widespread severe weather is not expected through next week.

&&

.DISCUSSION...
Issued at 108 PM CDT Fri Aug 7 2026

SPC has upgraded to a Slight Risk, level 2 out of 5 risk, for
much of northwest Wisconsin for this afternoon and into the
early evening. A Marginal Risk, level 1 out of 5 risk, extends
into the I-35 corridor in Minnesota. The biggest question is how
much heating will occur across northwest Wisconsin this
afternoon with a combination of both low level cloud cover
beneath the cap, and anvil spreading across from storms further
south in Minnesota. The longer this cloud cover holds, the less
buoyancy will build which will limit the severe thunderstorm
threat. If clouds are able to dissipate some, MLCAPE values on
the order of 1500-2000 j/kg could materialize across northwest
Wisconsin with surface dewpoints in the mid 60s ahead of the
cold front. Effective deep layer shear of 25-30kts will be
sufficient for some organized convective structures. However,
this modest shear will place somewhat of a limit on storm
organization, intensity and the hazards. Primary threats include
large hail to ping pong ball size, damaging winds to 60 mph,
locally heavy rainfall and dangerous lightning. The time of the
peak threat in northwest Wisconsin looks to be between 21Z and
00Z (4pm-7 pm CDT).

For the rest of the forecast for this weekend and into next
week, quasi zonal flow is favored across the lower 48. This
overall large scale flow pattern favors near normal temperatures
with high temperatures in the 70s to lower 80s. The main storm
track is favored to remain south of the Northland, however, low
predictability impulses embedded in the faster flow aloft and
daytime heating would present a near daily, sporadic coverage of
rain showers and thunderstorms (isolated to scattered
coverage). Overall, with limited buoyancy, severe weather is not
likely.

&&

.AVIATION /12Z TAFS THROUGH 12Z SUNDAY/...
Issued at 634 AM CDT Sat Aug 8 2026

Patchy fog has developed across northeast Minnesota and
northwest Wisconsin early this morning with light winds and high
relative humidity due to rainfall on Friday. Several locations
have been getting intermittent fog with visibilities of a mile
or less, but only KHYR and KHIB have been included. This fog
should linger for another couple hours, then burning off to VFR
conditions by mid morning today. VFR conditions are forecast on
Saturday with a cumulus field developing with cloud bases above
5kft. Showers and a few thunderstorms are expected to develop
after 00z Saturday over northern Minnesota. These should
gradually shift east-southeast overnight. For now I have
included a -SHRA group for KHIB and KDLH where precipitation is
most likely. Have added a VCSH group to KINL and KBRD as they
should be the next most likely sites.

&&

.MARINE /FOR NEARSHORE WATERS OF WESTERN LAKE SUPERIOR/...
Issued at 234 AM CDT Sat Aug 8 2026

Patchy fog early this morning will dissipate by mid-morning.
Southwest winds will increase today, reaching 10 to 15 knots
with afternoon gusts 20 to 25 knots along the North Shore. This
may necessitate Small Craft Advisories north of Taconite Harbor
as waves build to 2 to 4 feet. Winds become lighter and shift to
the northeast and east for Sunday. Scattered showers and storms
are possible tonight through Monday, but widespread severe
storms are not expected.

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

&&

.FIRE WEATHER...
Issued at 234 AM CDT Sat Aug 8 2026

Sunny and dry conditions are expected today with minimum
relative humidity values dropping to 35 to 45 percent, with the
lowest values over the Pine Barrens of northwest Wisconsin. West
winds will remain modest at 5 to 10 mph. Humidity recoveries
improve tonight and Sunday as moisture increases. Showers and a
few thunderstorms are expected to develop this evening and then
slide slowly east-southeast overnight into Sunday morning.
Minimum relative humidity will rise to 45 to 55 percent on
Sunday with northwest winds up to 10 mph. Rain chances to
persist into Sunday into Monday.

See the Fire Weather Forecast product for a more thorough
breakdown of fire weather conditions.

&&

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

&&

$$

DISCUSSION...PA
AVIATION...LE
MARINE...LE
FIRE WEATHER...LE