104
FXUS63 KARX 212324
AFDARX

Area Forecast Discussion
National Weather Service La Crosse WI
624 PM CDT Tue Jul 21 2026

.KEY MESSAGES...

- Mainly dry from Wednesday into Friday Night.

- Becoming hotter this weekend with 90s returning for many on
  Sunday.

&&

.DISCUSSION...
Issued at 1223 PM CDT Tue Jul 21 2026

Through Tonight

A Canadian cold front will move southeast through the area this
afternoon and evening. With cyclonic flow and cold air
advection aloft, the CAMs are indicating isolated to scattered
showers mainly located north of Interstate 90. At this time,
kept the 20 percent chance of showers across north-central
Wisconsin. High temperatures will range from the lower 70s to
lower 80s.

Low temperatures will range from the mid-40s to mid-50s tonight.

Wednesday through Friday night

High pressure will provide mainly dry weather from Wednesday
through Friday night. Even though there is northwest flow
aloft, the fires along the US/Canadian border are far smaller
than those in Canada`s boreal forest, so the HRRR is continuing
to show very low concentrations of surface smoke and the
concentrations of smoke at 6K feet also remain generally light
too.

High temperatures will gradually warm through Friday. High
temperatures will be in the lower and mid-70s on Wednesday, and
range from the mid-70s to lower 80s on Thursday and Friday.

Low temperatures will mainly be in the 50s and lower 60s.

Weekend

A warm front will move east and northeast through the region on
Saturday night and Sunday morning. A mesoscale convective
complex will likely develop over the Northern Plains and then
track into the Upper Mississippi River Valley during the
overnight and Sunday morning. Due to the uncertainty on its
track, kept rain chances in the 20 to 50 percent range. With the
3-6 km shear less than 30 knots, severe weather chances for
organized convection remains on the low side.

High temperatures will be in the lower to mid-80s on Saturday
and ranges from the mid-80s to lower 90s.

&&

.AVIATION /00Z TAFS THROUGH 00Z THURSDAY/...
Issued at 620 PM CDT Tue Jul 21 2026

VFR conditions are forecast at the terminals over the next 24
hours. Mid level clouds continue to stream in from the north but
they should lift overnight into the daytime on Wednesday. The
wind will generally remain out of the north to northeast during
this TAF cycle. Occasional wind gusts up to 20 kts are possible
for another hour or two but the wind will decrease this evening
down to 10 kts or less through Wednesday afternoon.

&&

.ARX WATCHES/WARNINGS/ADVISORIES...
WI...None.
MN...None.
IA...None.

&&

$$

DISCUSSION...Boyne
AVIATION...Muscha