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North Georgia Ice Storm
December 4, 2002
by Dean Hutsell, Shirley Lamback, and Jeff Dobur |
OVERVIEW: On Tuesday, the day before the storm, afternoon temperatures
across Georgia ranged from the mid 50s across far northern counties
to the 60s over the rest of the state. Tuesday night, high pressure at the surface
pushed a wedge of cold, dry air that originated in Canada down the east
slopes of the Appalachian Mountains. Meanwhile a low pressure area
was developing
in the south central part of the United States. This storm system began spreading
moisture eastward into Georgia by early Wednesday morning...overrunning the cold,
dry air which was advancing into northeast portions of the state.
PRODUCTS: At 1120 AM Tuesday A Winter Storm Watch was issued for
Wednesday and Wednesday night for the area east and north of a line from Blue
Ridge to Atlanta to Crawfordville. An Ice Storm Warning was issued at 345 PM
Tuesday for the same time and area...which included 29 counties of Northeast Georgia
in Peachtree City's County Warning Area (CWA).
The warning called for ice accumulation of one quarter inch or more.
EVENT: Light rain began falling over far North Georgia
by daybreak Wednesday...where temperatures were still in the upper 30s to middle 40s.
Temperatures fell to around freezing northeast of a line
from Athens to Dawsonville by mid to late morning...and isolated reports of
ice pellets (sleet) and even a few flurries began coming in. By
afternoon, drier air aloft was noted spreading from central Georgia
into the Atlanta and Athens areas...and radar showed a diminishing trend
of the precipitation. A mixture of rain, freezing rain, and sleet continued
further to the north of the Atlanta to Athens line. A larger area of precipitation
from northwestern Alabama to the Louisiana coast then began to advance in a more easterly
direction by early Wednesday evening. The largest rainfall amounts came late Wednesday
night when between 2 and 3 inches fell over parts of Northeast Georgia.
Luckily ground temperatures were still warm and air temperatures fell only to
between 30 and 32 degrees in parts of the area of concern. Freezing rain on
exposed surfaces, such as trees, power lines, and cars accumulated to around
a quarter of an inch, with isolated half inch amounts reported.
Roads were generally just wet, but some bridges and roads did have a thin
layer of ice. Temperatures began to slowly rise before daybreak Thursday...which
melted much of the accumulated ice. There were no power outages reported.
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