COLUMBUS, Ga. (WRBL) —You may heard of the term "wedge" or "the wedge" especially after extreme heat and humidity but what it exactly is it and how can it impact our forecast?
The wedge is the common name of the weather phenomenon called Cold Air Damming and sometimes referred to as the backdoor cold front.
Low-level cold air masses are trapped topographically, in our case by the Appalachian Mountains. Cold air then becomes entrenched on the east side of the mountains and slowly filters down across Upstate South Carolina and the Piedmont region of Georgia.
When this happens, we usually experience cooler temperatures, increased cloud cover and increased chances for rain, especially when we have an influx of moisture from the gulf to work with.
During the winter, temperatures may be cold enough to produce freezing precipitation across northeast Georgia .
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