Atlanta, GA, Weather: 11/12/19

Yesterday was humid, warm and sunny.  As I drove north, the clouds increased and the temperature dropped.  After a late dinner in Atlanta, it started raining and got a little colder.

This morning has been rainy, cold and breezy.

From the NWS in Peachtree City, GA:  An impressive trough has brought unseasonably cold temperatures to the south.  Temperatures will continue to fall this afternoon and evening.  Light snow has fallen in the northeastern mountains.

The NWS in Peachtree City, GA, forecasts (for Atlanta, GA) rain in the morning, followed by a sunny day in the afternoon, with a high temperature of 44 F.  The winds will be from the northwest at 15-20 mph, gusting to 30 mph.  This evening will be clear, with a low temperature of 26 F.  The winds will be from the north at 15-20 mph, gusting to 30 mph, but then decreasing to 5-10 mph after midnight.

The NWS in Peachtree, GA, has issued quite a few products.  Most of the state is under a Freeze Watch, and many areas are also under a Wind Advisory.  The NWS Watches and Warnings graphic is shown below:

The visible satellite imagery shows thick bands over the Atlanta area ahead of the approaching with the cold front.

The 12Z upper air sounding is unavailable at this time.

The surface observations chart (from the SPC Mesoscale Analysis Map) shows cold temperatures and high surface humidity.  The skies are cloudy (according to the sensors) and the winds are light and from the northwest.  The Doppler RADAR shows bands of precipitation over the northern half of the state.

The surface pressure chart (from the SPC Mesoscale Analysis Map) shows that high pressure is on its way, and a sharp pressure gradient is moving into the region.  The RAP shows that this trend will continue for at least the next six hours.

The NAM 250 mb chart shows moderate zonal to slightly northwesterly flow.

The NAM 850 mb chart shows strong Cold Air Advection (CAA) today.  It is one of those strange days where the day will get cooler in the afternoon.

The Nested NAM simulated reflectivity chart shows that the rain will clear up later this morning.

The Nested NAM predicts that the high temperatures has already peaked in the mid 40s F today.

The low temperature is predicted to be in the mid 20s F late this evening.

The Nested NAM shows that the dewpoints will drop into the 20s F by this afternoon.

The Nested NAM shows that strong gusts are possible off and on today.

The Nested NAM predicts that the clouds will clear out this morning.  This image has been excluded from today’s post.

Ugh, it’s now winter in Georgia as well.  Yesterday, I debated going to the beach in Florida (I didn’t), now I’m glad I brought a winter coat.

Thank you for reading my post.

Sources:
The forecasts from the National Weather Service are from The NWS Homepage
The upper air soundings and mesoscale analysis plots are from the Storm Prediction Center website.
The satellite data, model data, and forecasted soundings are from College of DuPage – SATRAD

About highplainschasing

This blog is about my tales in storm chasing. My name is Seth Price and I am an instrumentation instructor at New Mexico Tech. My amateur radio call sign is N3MRA.
This entry was posted in Local WX, Practicing Concepts, Predictions, Satellite Imagery, Winter Weather and tagged , , , , , , . Bookmark the permalink.

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