... Dense fog advisory now in effect until 10 am EST this
* locations... all of southeast Georgia... including Savannah and
Statesboro... as well as areas in southeast South Carolina
along the Savannah River.
* Visibilities... one quarter mile or less at times.
* Impacts... low visibility will make travel difficult.
Be prepared for increased travel time. If driving... slow down...
use low beam headlights... and leave plenty of distance ahead of
you in case a sudden stop is needed.
Severe Weather Get Mobile & Email Alerts
Coastal McIntosh Severe Watches & Warnings NOAA Weather Radio
Dense Fog Advisory
Statement as of 5:35 AM EST op 01 december 2015
Public Information Statement
Statement as of 6:00 am EST on December 1, 2015
... Winter weather awareness week continues across South Carolina
and winter weather preparedness week continue across Georgia...
Today we will discuss the impacts of snow and sleet across southeast
Georgia and southeast South Carolina.
Our region averages less than one inch of snowfall per year. The
probability for snow and sleet during any given winter ranges from
less than 10 to 15 percent across coastal counties and counties
along and south of Interstate 16 to 15 to 25 percent farther north
and across inland locations.
Snow and sleet are rare at our latitude because necessary
ingredients such as moisture and cold air seldom develop or arrive
here at the same time. However... during rare occasions when these
factors combine... we can experience significant snowstorms. Snow
buried parts of the region in February 1973... December 1989 and most
recently in February 2010.
Snow will accumulate most readily on bridges... overpasses and on
non-paved surfaces such as trees... automobiles and wooden decks.
Since the ground temperature normally remains above freezing
in our region... and since the sun can warm the ground and the
atmosphere even on cloudy days... most light snow will tend to melt
at temperatures close to freezing. However... heavy snow will
accumulate anywhere and can quickly create dangerous travel
conditions. Further... even a few inches of heavy wet snow can bring
down trees... tree limbs and power lines.
In our region... infrequent snow events usually occur at temperatures
close to freezing... and snow will normally melt fairly quickly after
precipitation ends especially during the day. However... if
temperatures are exceptionally cold snow will accumulate more
efficiently on more surfaces and will melt very slowly even after
precipitation ends. This was the case during the snowstorm of
December 23 1989... when frigid temperatures topped out at 20 degrees
in Charleston and 22 degrees in Savannah.
Sleet commonly forms when snow partially melts as it falls through
warm air aloft. While sleet will typically accumulate less rapidly
than snow and can reduce total snow accumulation during a given
storm... heavy sleet can still produce hazardous travel conditions.
The National Weather Service in Charleston South Carolina will issue
a Winter Storm Warning for heavy snow and/or sleet when we expect at
least 2 inches of accumulation within a 12 hour period... or when
lesser amounts of snow and sleet will accumulate quickly and will
produce travel conditions which endanger lives.
Your response to National Weather Service outlooks... watches...
warnings and advisories can dictate the Success of our services.
Friday... we will address winter weather preparedness plans.
Check out additional severe weather awareness week information on
our web Page at www.Weather.Gov/chs/... as well on facebook at
www.Facebook.Com/US.Nationalweatherservice.Charlestonsc.Gov. You can
also follow @nwscharlestonsc on twitter.