Gwinnett Under Ice Storm Warning
In what could be the first of three pre-Christmas winter events, Gwinnett County is waking up this morning to an ice storm. Originally predicted to stay north of our area, temperatures dropped enough prior to the onset of rain to create a hazardous situation once the rain began to fall.
The Weather Service gave up shortly after midnight and issued a winter storm warning for Gwinnett County and Northeast Georgia until 6 PM on Thursday. Peering outside, light ice has formed on the trees. Several areas are without power, including parts of Lilburn and Duluth, although the situation so far doesn’t seem too serious.
Here, temperatures dropped as low as 30.9 degrees around 1 AM before starting to rise slightly, although the thermometer hasn’t gone above the present 32.5 degrees. Once day breaks, the question is how fast and far the temperatures will go up. For areas to the south and west, we’re likely to see above freezing temperatures after sunrise. North and east may see temperatures hover in the 32 degree range until afternoon. Both areas will see up to a quarter of an inch of precipitation before things slow down this afternoon.
Forecasters were slightly caught by surprise this morning by the extent of the cold weather’s reach. Atlanta is on the edge of two frontal systems - a high pressure system centered over New England bringing in cold, dry air in from the east, and a low pressure system bringing in the rain from the southwest. This mixture caused a wedge of cold air to get stuck over the north Georgia mountains. Yesterday was expected to make it into the low 40s in northeast Atlanta, with temperatures staying above the freezing mark overnight.
Instead, the wedge was stronger than expected, reaching farther south. the temperature here hit a high of 38 degrees shortly after noon before beginning to fall slightly. By the time the rain arrived in the early evening, the thermometer began to drop even more as dewpoints began to rise.
Even if we manage to dodge the bullet today, there are two more chances of winter weather in the next week - on Sunday, and again on Tuesday or Wednesday. I’ll post more on these possibilities later.
Sphere: Related Content