Decorah, Iowa Weather Forecast Discussion

697
FXUS63 KARX 272325
AFDARX
Area Forecast Discussion
National Weather Service La Crosse WI
625 PM CDT Sat Sep 27 2025
.KEY MESSAGES...
- It will be dry with above-normal temperatures through Friday.
&&
.DISCUSSION...
Issued at 134 PM CDT Sat Sep 27 2025
Tonight and Sunday Night
While the winds aloft will be decreasing tonight, the overall fog
potential looks to be on the low side due to a downslope winds and
drying moisture in the boundary layer. Low temperatures tonight will
be in the 40s.
Sunday through Friday
A ridge of high pressure will dominate the weather for much of next
week. High temperatures will range from the mid-70s to mid-80s. Like
yesterday, the high temperatures from Wednesday through Friday
look to be on the cool side. Currently, the temperatures are in
the mid- 70s to around 80. If these trends continue, these
temperatures will have to be eventually raised into the 75th
percentile which ranges from the upper 70s to mid-80s.
From looking at the dew points upstream, they are a bit too high.
Will be using the NBM 10th percentile to bring them closer to
reality for Sunday and Monday.
&&
.AVIATION /00Z TAFS THROUGH 00Z MONDAY/...
Issued at 623 PM CDT Sat Sep 27 2025
VFR conditions with mostly clear to clear skies will be
predominant over the next 24 hours. Some fog/stratus could occur
around the usual trouble spots in the Wisconsin River valley but
drier air filtering into the region should limit this greatly.
Similarly, while light winds in the lowest 10 kft of the
atmosphere would support fog formation at LSE, the arrival of
drier air increases confidence that disruption will not occur.
Have therefore trended away from LIFR using a FEW group with a
view toward total removal with the 00z issuance.
&&
.ARX WATCHES/WARNINGS/ADVISORIES...
WI...None.
MN...None.
IA...None.
&&
$$
DISCUSSION...Boyne
AVIATION...Ferguson

NWS ARX Office Area Forecast Discussion