This means to expect winds will average 40 miles per hour or higher for at least one hour. Or, that wind gusts will be greater than 58 miles per hour. Trees and utility lines can be blown down. A high wind watch may precede a high wind warning if the strong winds are not expected to be occurring for at least 12 hours. This means life-threatening cold with windchill temperatures computed to be 40 degrees below zero or colder for at least three hours.
Long exposures can be fatal.
This is issued for snowfalls greater than four inches, but less than seven inches, in a 24-hour period. The heavy snowfall is usually expected to begin within the next 12 hours. When the visibility is expected to be significantly reduced, or when the roads become snow-covered over a large area this advisory is posted. This is issued for cold temperatures and winds, with wind chill temperatures computed to be 25 degrees below zero or colder for at least three hours. Prolonged exposure may be fatal.