Words & Terms to Know ...
Note: The criteria differs for other areas of Missouri that are covered by other NWS offices. Consult the office responsible for your area.
Outlook - The Hazardous Weather Outlook (HWOSGF, FLUS43 KSGF) will contain any and all information pertaining to potential winter storms that may occur in the latter days of the forecast.
Watch - A watch is used when the risk of hazardous winter weather has increased significantly, there is a strong possibility it will reach warning criteria, and falls in the 12 to 48 hour portion of the forecast.
Warning - The following warnings are issued when an event is occurring, is imminent, or has a high probability of occurrence. Warnings are issued for events that can be life threatening. The following warnings can be issued.
Blizzard Warning: Sustained wind or frequent gusts greater than or equal to 35 mph accompanied by falling and/ or blowing snow, frequently reducing visibility to less than 1/4 mile for three hours or more.
Ice Storm Warning: Ice accumulation of 1/4 inch or more.
Winter Storm Warning: Issued for snow events of 6 inches or more, sleet accumulations of 1/2 inch or more, or a combination of winter precipitation which will create life threatening conditions. For parts of Southern Missouri, the criteria for snow is 4 inches or more. Consult with your local NWS office.
Wind Chill Warning: Wind chill temperature of minus 25 degrees F or colder. :
Advisory - The following advisories will be issued when an event is occurring, is imminent, or has a high probability of occurrence. These are issued for lesser events that while presenting an inconvenience, do not pose an immediate threat of death, injury, or significant property damage.
Winter Weather Advisory: Issued for lesser snowfall amounts. Depending on when the snow will fall and the temperatures an advisory could be issued for anywhere from 1 to 5 inches of snowfall. An advisory will be issued for sleet accumulations of less than 1/2 inch, or an advisory can be issued when a combination of winter precipitation which will produce hazardous conditions. .
Freezing Rain Advisory: Light freezing rain which produces ice accumulations less than 1/4 inch.
Wind Chill Advisory: Wind chill values of minus 15 to minus 24 degrees F.
Situation Report: Issued when Winter weather hazards will be impacting across the area.
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