Granite Peak

000
FXUS63 KMKX 261144
AFDMKX

Area Forecast Discussion
National Weather Service Milwaukee/Sullivan WI
644 AM CDT Mon Oct 26 2026

.KEY MESSAGES...

- Cool, crisp start to the week with highs today in the 50s to 
  low 60s. Then milder, above normal temps through at least 
  midweek.

- Scattered sprinkles or very light rain today. Additional  
  chances return Wednesday night through Thursday with 
  additional chances this weekend.


&&

.UPDATE...
Issued 643 AM CDT Mon Oct 26 2026

A stream of vorticity maximums upstream across IA, NE and KS will
track across srn WI today. Very light showers or sprinkles can
be expected. Nely winds and mostly cloudy skies will maintain a
cooler day, mainly in the 50s. 

Gehring

&&

.SHORT TERM...
Issued 1200 AM CDT Mon Oct 26 2026

Today through Tuesday night:

Cold front will continue to slide southward through the early 
morning hours. Expect colder air to filter in behind the front 
and keep temps on the cooler side through the day with 
northeasterly breezy winds. Highs are only looking to climb 
into mid 50s to low 60s, especially with lingering cloud cover. 
High pressure will skirt north overnight and winds will diminish
overnight. Still a cool, crisp fall night with lows in the 40s 
into Tuesday morning. However these cooler fall temps are not 
looking to stick around as low-level WAA quickly returns to 
southern WI as mid-level shortwave trough traverse the region 
along with a weak surface low.

Given this system's track on Tuesday, expect temps to warm back
above normal with daytimes temps in the 60s. While PWATs do 
look to climb to around 1 inch on Tuesday, not looking like we 
will see precip associated with this system as forcing and 
moisture are not looking to align over southern WI and better 
chances remain to north and west. Thus, continue the dry trend 
for Tuesday into Tuesday night. 

Wagner

&&

.LONG TERM...
Issued 1200 AM CDT Mon Oct 26 2026

Wednesday through Sunday:

Looking at another surface low and associated mid-level 
shortwave trough to track across the region for Wednesday. 
Again this system is trending to remain just far enough west 
and north from southern WI to limit moisture and precip chances 
for Wednesday. Still looking at low-level WAA and above normal 
temps for midweek as well. As the low pressure tracks across 
Ontario to Hudson Bay Region Wednesday night into Thursday, the 
associated cold front looks to drag across the Upper Midwest. 
While upper-level forcing looks to remain closer to the surface 
low and upper-level trough to our north, mid-range models do 
prog moisture to increase in the warm sector. Pair the increased
moisture with PWATs above 1 inch and forcing along the cold 
front, this looks to be our best chance to see some measurable 
rainfall across southern WI Thursday. Behind the front a cooler 
airmass will settle in toward the end of the week as high 
pressure builds across the region through the weekend.

Wagner

&&

.AVIATION...
Issued 643 AM CDT Mon Oct 26 2026

Local MVFR Cigs across srn WI today with small pockets over 
very light showers or sprinkles. The local MVFR Cigs may
continue tnt-Tue AM. 


Gehring

&&

.MARINE...
Issued 1200 AM CDT Mon Oct 26 2026

Gusty northeasterly winds are expected to pick up through the 
morning and afternoon as high pressure builds behind the 
overnight cold front. Given the gustier winds and persistent 
onshore component, expect waves and gusts to reach Small Craft 
conditions today into tonight. Then as the high shifts east and
low pressure builds up from the Plains, winds are looking to 
turn southeasterly for Tuesday with small craft conditions 
persisting as well. Similar conditions are looking to develop 
for midweek but with more southerly winds and additional periods
of small craft conditions are possible. Then a cold front will 
track through later this week bringing a return of northerly 
winds.

Wagner

&&

.MKX WATCHES/WARNINGS/ADVISORIES...
WI...None.
LM...Small Craft Advisory...LMZ643-LMZ644 until 10 PM Tuesday.

     Small Craft Advisory...LMZ645-LMZ646 until 1 PM Tuesday.

&&

$$

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