Geoscience Reference
In-Depth Information
Figure 5.7 Downed tree and snow-covered automobile attest to the magnitude
of snowfall in the Asheville, North Carolina, area. Photo taken March 14, 1993.
(National Oceanic and Atmospheric Administration.)
Preparation and Planning
Emergency Managers must be knowledgeable of the different watches and warn-
ings that can be issued for winter weather. Knowledge of these definitions will assist
the Emergency Management official in determining appropriate action to take to
protect their organization, as well as the public. Winter weather watches and warn-
ings include
Winter Weather Advisory—Winter weather conditions are expected to cause
significant inconveniences and may be hazardous.
Winter Storm Watch—A winter storm is possible in your area. Tune in
to NOAA All Hazards Radio, commercial radio, or television for more
information.
Winter Storm Warning—A winter storm is occurring or will soon occur in
your area. Finish all precautionary measures immediately.
Blizzard Warning—Sustained winds or frequent gusts to 35 miles per hour
or greater and considerable amounts of falling or blowing snow (reducing vis-
ibility to less than a quarter mile) are expected to prevail for a period of three
hours or longer.
Severe Blizzard Warning—A severe blizzard warning means that very heavy
snow is expected with winds exceeding 45 miles per hour and temperatures
below 10°C. Visibility can be reduced to a few feet.
Frost/Freeze Warning—Below freezing temperatures are expected in the area.
Emergency Managers must work with their organizations and the public to prepare
before a winter storm occurs. This includes encouraging constituents to build a
winter storm survival kit for their home as well as their vehicle. The winter storm
