Sustained wind or frequent gusts of 35 mph or higher,
AND visibility less than 1/4 mile in snow and/or blowing snow for 3 hours or longer.
Ice Storm Warning
Damaging ice accumulations of 1/4″ or more.
Winter Storm Warning
Snowfall of 4″ or more in 12 hours or 6″ or more in 24 hours,
OR sleet accumulation of 1/2″ or more in 24 hours.
Winter Weather Advisory
Snowfall of at least 2″ but less than 4″ in a 12 hour period,
AND/OR visibility reduced to 1/4 mile or less in blowing snow,
AND/OR sleet accumulation of less than 1/2″.
Freezing Rain Advisory
Ice accumulations of less than 1/4″.
Wind Chill Warning
Wind chills of 25 below or colder are expected. In most cases a minimum wind speed of 10 mph should be occurring or forecast before a warning is issued.
Wind Chill Advisory
Wind chills of 10 below to 24 below are expected. In most cases a minimum wind speed of 10 mph or more should be occurring or forecast before an advisory is issued.
