426
FXUS63 KDLH 111141
AFDDLH

Area Forecast Discussion
National Weather Service Duluth MN
641 AM CDT Fri Jul 11 2025

.KEY MESSAGES...

- Storms are possible again today, with some being strong to
  severe this afternoon and evening. General storms will
  continue into Saturday.

- Probabilities are increasing for precipitation somewhere in
  the Northland as early as Sunday evening into Monday. Warm
  temperatures return Sunday through Tuesday.

- Our next widespread chance for showers and storms will be
  early Tuesday morning through Tuesday night.

&&

.DISCUSSION...
Issued at 213 AM CDT Fri Jul 11 2025

Patchy fog is present this morning, but should dissipate quickly
with the sun rising. Instability will build throughout the
morning ahead of a cold front which will move through the
Northland this afternoon and tonight. As with the last couple
days, instability is plentiful (1000-3000 J/kg) but shear is
lacking (up to 15 kts). Most high res models still have no clue
how to handle this convection. The HRRR is currently the best
though, so leaning towards that solution for Probability of
Precipitation for now. Convection is expected to initiate as the
cold front dips to the southeast into north central Minnesota.
Main hazards will be damaging winds up to 60 mph and hail up to
1 inch. PWats have decreased slightly in high res models as
well, but storm motion will likely be along the front,
increasing the chance for training. This may lead to heavy
rainfall and localized ponding or flooding. Showers and storms
will continue into Saturday, but the threat for severe weather
towards the morning decreases. Though the cold front passes, the
trough will remain in the area throughout Saturday. Southerly
flow aloft will help to reinvigorate the instability across
portions of northeastern into northwestern Wisconsin. Wind shear
will have increased behind the cold front, with values in the
30s and 40s, and CAPE around 1000 J/kg. The wild card will be
the cap aloft, which will inhibit initiation. If they do, some
could be strong along our eastern CWA border.

Temperatures will have a brief decrease in the 70s across the
Northland before increasing again as warm air is advected into
the region ahead of a trough. The strength of the trough still
differs between models, but they are starting to agree that
there will be showers and storms Sunday afternoon into Monday
ahead of another cold front. Some could, again, be strong to
severe as models show sufficient instability and shear. The
cold front will dip south late Tuesday. Models differ on the
speed of the front, and how long chances for storms will
accompany it.

&&

.AVIATION /12Z TAFS THROUGH 12Z SATURDAY/...
Issued at 637 AM CDT Fri Jul 11 2025

Fog from earlier this morning is starting to clear. Storms are
expected again today, and a cold front will move through later
today, with the highest probabilities for storms as it passes.
However, there will be plenty of fuel for storms to initiate
ahead of time, so cannot rule that out. PROB30s have been added
where storms could form ahead of and/or behind the cold front.
Models are hinting at fog again tomorrow night where there is
rainfall.

&&

.MARINE /FOR NEAR SHORE WATERS OF WESTERN LAKE SUPERIOR/...
Issued at 213 AM CDT Fri Jul 11 2025

Variable winds over western Lake Superior today will only max
out at around 10 kts. Showers and storms are possible over the
lake this evening, and some have the potential to be strong to
severe. Main threats will be gale force winds, hail, and cloud
to water lightning. Winds will then increase out of the
southwest tomorrow, but will still only gust to around 15 kts.
Waves up to 2 ft are possible with the increased winds.

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...KML
AVIATION...KML
MARINE...KML