textproduct: La Crosse

KEY MESSAGES

- Mostly dry week with gradual warming to slightly above normal temperatures by midweek. Weaker winds today, becoming cloudy.

DISCUSSION

Issued at 840 AM CDT Mon Oct 19 2026

Calmer Winds Today, Turning Cloudier:

While calmer winds are expected today, cloudier skies are expected to affect the local forecast area, building through the daytime hours before eventually exiting tonight. The responsible final stages of upstream trougholysis advects a band of increased low level moisture across the forecast area before subsequent anticyclonic flow fills in across the Upper Mississippi River Valley. Have increased daytime high temperatures a couple of degrees off of National Blend in collaboration with neighboring forecast offices based on forecast trends and recent observations. Resultant daytime highs will feel more like the start of October instead of the penultimate week to the month.

Lowering Confidence in Subsequent Precipitation Chances:

A temporary, weak synoptic omega pattern keeps the local forecast area in a dry pattern with slightly above normal temperatures through the week. Local precipitation chances this weekend are decreasing in confidence due to a stronger solution to the upper level ridge through the central CONUS. Resultant advection of the required synoptic forcing lifts farther west/northwest than previous forecasts.

AVIATION /12Z TAFS THROUGH 12Z TUESDAY/

Issued at 631 AM CDT Mon Oct 19 2026

VFR expected through most of the 19.12Z TAF period. Light winds through the daytime mostly remain out of the south although may vary some.

River valley fog possible late in the TAF period into early Tuesday morning. Current confidence remains low (<20%) and therefore have abstained from including in KLSE TAF. Will require additional fine-tuning in coming TAF issuances.

ARX WATCHES/WARNINGS/ADVISORIES

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