textproduct: La Crosse

KEY MESSAGES

- Mainly dry and unseasonably warm into next weekend.

DISCUSSION

Issued at 1139 AM CDT Sun Oct 18 2026

Tonight

With the loss of diurnal heating and the surface pressure gradient decreasing, the winds will quickly subside tonight. With light winds and dry dew points, temperatures quickly cool overnight. The NBM looked to be a bit too warm, so did a 50-50 blend of the NBM and the NBM 10th percentile. This lowered temperatures up to 5F. The largest drop was in central and north-central Wisconsin. Low temperatures tonight will range from the lower 30s to mid-40s.

Monday - Friday

A 500 mb ridge will gradually build north into the region early this week and then keep the area dry through Friday. High temperatures will be mainly in the 60s through Wednesday and then range from the upper 60s to mid-70s for the remainder of the week. Low temperatures will range from the mid-30s to mid-40s on Monday and Tuesday nights, and in the 40s and 50s for the remainder of the week.

Next Weekend

A negatively-tilted northern stream shortwave will lift northeast from the Central and Northern Plains into Ontario. In its wake, the upper-level ridge will build back across the area. This trough will provide a chance of rain from Saturday afternoon into Sunday morning. With dry air across the region, the rain amounts will be on light side (generally less than a trace). High temperatures will be in the 60s and lower 70s. Low temperatures will range from the upper 40s to mid-50s.

AVIATION /00Z TAFS THROUGH 00Z TUESDAY/

Issued at 646 PM CDT Sun Oct 18 2026

VFR expected through the 19.00Z TAF period. While overnight river valley fog cannot completely be ruled out, current low dewpoint temperatures limit confidence in extent of saturation.

ARX WATCHES/WARNINGS/ADVISORIES

WI...None. MN...None. IA...None.