The Hudson Hot Air Affair is the premier winter ballooning event and winter festival in the Midwest. Thousands of visitors head to the St. Croix Valley in west central Wisconsin on the first full weekend in February.

Ideal conditions:
–Light winds less than 6     mph
–Good visibility
–Sunshine or if cloudy,
     high cloud ceilings

Unfavorable conditions:
–Too strong wind, over
     8 mph OR no wind at all
–Poor visibility or
     low cloud ceilings
–Snow or rain