Big John WEATHER Summary & Discussion
(Issued 3:00 pm Tuesday December 10th, 2013)
Great example of a passing cold front today.
There's low pressure over Columbia, SC, as of this writing, and it's marching to the northeast with the trailing cold front marching through Carolina and Georgia. "Classic" synoptic weather features ahead and behind the front with this passage.
Front will sweep across the area from west-to-east, getting offshore early afternoon. Ahead of the front, two waves of energy.
The first earlier today featured a brief heavy shower, even a rumble of thunder and briefly gusty winds as it roared by. The second wave, and perhaps the stronger, is closer to the front itself, site of the greatest lift. QPF suggests up to a quarter-of-an-inch of rain.
The day's high was just before the front passed. The strongest winds were along the coast as the front passed with gusts over 40 mph (goodbye sea fog). And now behind the front, skies are clearing, gusty north winds ushering in cooler drier air.
When this happens in springtime, the dynamics are more volatile and we get a risk of severe weather, with exactly the same scenario.
With the drier air, we will cool to the low 40s tonight, even some mid 30s higher elevations of Allendale, Screven and Jenkins Counties. Some "wrap-around" clouds from the system are forecast for tomorrow and only the low 60s.
And we follow that with a couple of dry pretty days for holiday jingle-jangle, or whatever you've got planned in your busy holiday schedule. Next rain chance will be Saturday, more likely Saturday night with another "classic" cold front. We'll be watching.
Meteorologist John Wetherbee, CBM
AMS Broad of Broadcast Meteorology
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