Whenever winter weather threatens, your National Weather Service Forecast Office will issue watches, warnings, advisories, and statements to keep you informed and prepared.
Winter Storm Outlook
Issued when there is a good chance of a major winter weather event beyond 36 hours.
Winter Storm Watch
Issued when the following conditions are possible within 12 to 36 hours: heavy snowfall of 4 or more inches in 12 hours or 6 or more inches in 24 hours; freezing rain and/or freezing drizzle accumulating to a depth of 0.25 inches or greater; or heavy sleet accumulating to a depth of 1/2 inch or more.
Winter Storm Warning
Issued when the hazardous winter weather conditions defined above are occurring or expected to occur within 12 hours.
Issued for the first occurrence of freezing temperatures in the fall, for late freezes during the spring, or for a freeze expected to occur after a prolonged warm spell.
Winter Weather Advisory
Issued when either or all of the following are expected. Snow accumulations less than 4 inches in 6 hours, or less than 6 inches in 24 hours OR freezing rain accumulation less than 0.25 inch. OR freezing drizzle with little or no accumulation.
Wind Chill Advisory
Issued when forecast wind chill values will be below -20 degrees.