Climate of Georgia (U.S. State) - Winter

Winter

Southern and southeast areas of the state experience snow much less frequently than other parts of Georgia. The Georgia Piedmont, sometimes referred to as the Blue Ridge province, is somewhat cooler in winter than the coastal areas. The Southern areas of the Piedmont may receive snow every other year, while areas close to the foothills get snow several times a year. The mountains of Georgia have the coolest climate and most frequent snowfall in the state, although snowfall is less than any other part of the Appalachian Mountains. The main winter weather hazard in northern Georgia is "freezing rain - or rain which freezes upon contact with the ground - which is 2 inches (5.1 cm) or more of snow falling in a 12 hour period, or 4 inches (10 cm) or more in a 24 hour period." The exception to this is the mountain areas of Fannin, Gilmer, Pickens, and other surrounding counties heavy snow is "3 inches (7.6 cm) or more of snow in a 12 hour period or 4 inches (10 cm) or more of snow in a 24 hour period". Watches for heavy snow are issued when a 50 percent or greater chance of 2 inches (5.1 cm) or more of snow falling in a 12 hour period, or 4 inches (10 cm) or more in a 24 hour period is expected. Again, there are exceptionsthan a trace of frozen precipitation has been recorded officially for Atlanta. The criteria for the mountain counties is "3 inches (7.6 cm) inches or more of snow in a 12 hour period or 4 inches (100 mm) or more of snow in a 24 hour period".

Winter weather watches are issued when there is a "50 percent or greater chance of significant and damaging accumulations of ice during freezing rain situations"; these watches are normally issued 12 to 48 hours in advance. A winter storm warning for an ice storm means that icy conditions are "occurring, imminent, or have a very high probability of occurring". These warnings are usually issued when there is an 80 percent or greater chance of meeting ice storm conditions.

Blizzards in Georgia are rare. The last blizzard the state had was in March 1993.

Winter in South Georgia, which lasts from December to January, is much more mild. Daytime highs range from approximately 50 °F (10 °C) in the northernmost interior areas to near 70 °F (21 °C) along the coast and in the extreme south.

Winters in Georgia are determined by the Pacific Ocean. During El Niño, the jet stream is located along the Southern U.S., allowing for colder and wetter conditions with greater snowfall. The opposite phase, La Niña, keeps the jet stream further north, thus winters are warmer and drier across Georgia.