FXUS63 KARX 191730
AFDARX

Area Forecast Discussion
National Weather Service La Crosse WI
1230 PM CDT Tue May 19 2026

.KEY MESSAGES...

- Cooler and dry through midweek with highs in the upper 50s to
  low 60s.

- Patchy to areas of frost possible in north-central and central Wisconsin
  tonight and Wednesday night. 

- Periodic shower and storms chances from Friday into early next
  week.

&&

.DISCUSSION...
Issued at 1225 PM CDT Tue May 19 2026

Cooler and Dry for the Rest of Today Through Thursday

After the cold front moves through, surface high pressure builds in 
and remains over the area through Thursday. This will keep the CWA 
under dry conditions and with the Upper Midwest on the edge of a 
longwave trough, temperatures will be on the cooler side with highs 
in the upper 50s to low 60s. Low temperatures tonight and Wednesday 
night get down into the upper 30s to potentially the mid 30s for 
portions of Clark and Taylor counties. There could be some patchy 
areas of frost with these low temperatures. There is a shortwave 
that pushes north from the Plains into the Upper Midwest, however 
uncertainty exists on if we get any precipitation from it. Currently 
the LREF gives a 30 to 50% chance for measurable rainfall to occur. 

Periodic Shower and Storm Chances From Friday into Early Next Week

Deterministic and ensemble forecasts both favor the upper-level 
pattern remaining in the zonal to southwest flow. During this same 
time period there are a few disturbances that move into the Upper 
Midwest that increase precipitation chances. Heading into early next 
week, temperatures warm back up into the low 80s as some southwest 
flow returns.

&&

.AVIATION /18Z TAFS THROUGH 18Z WEDNESDAY/...
Issued at 1226 PM CDT Tue May 19 2026

An OVC to BKN cloud deck gradually thins and lifts through this
evening, with VFR conditions after 03-05Z through the day on
Wednesday. Northwest winds of 10-15G20-25kts gradually diminish
this evening and veer to the north around 5 kts for Wednesday
morning.

&&

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

&&

$$

DISCUSSION...Cecava
AVIATION...Skow