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Wintry Winter Storm Dec 7-10

tractor girl said:
Wonder if that pocket of higher ground temps is due to Stone Mountain and Arabia Mountain exposed granite (acting like a heat sink)...
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I think that certainly contributes to this observed anomaly, probably doesnt also help you have the big urban heat island of the Atlanta Metro area
 
Webberweather53 said:
I think that certainly contributes to this observed anomaly, probably doesnt also help you have the big urban heat island of the Atlanta Metro area
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Acknowledged, though Metro ATL is about 40 miles due west of Stone Mountain. It's in the county of Fulton, dissected to the left of the green circle. Actual downtown ATL shows cooler ground temps per this map.
 
tractor girl said:
Acknowledged, though Metro ATL is about 40 miles due west of Stone Mountain. It's in the county of Fulton, dissected to the left of the green circle. Actual downtown ATL shows cooler ground temps per this map.
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Hmm maybe there is a distortion in the map or something. But i'm not sure. A similar look is displayed say on the GFS with overnight lows also. The lows never get as cold in the cities and stuff like that.
 
WPC Model Discussion...

PREFERENCE: 12Z ECMWF/UKMET/CMC

BLEND CONFIDENCE: AVERAGE

THE FIRST SHORTWAVE WEAKENING SOUTHEASTWARD FROM CA/AZ SHOWS GOOD AGREEMENT IN THE MODEL GUIDANCE BUT THERE ARE DIFFERENCES TO TALK ABOUT REGARDING A SHORTWAVE AMPLIFYING SOUTHWARD ACROSS THE CNTRL ROCKIES WED/WED NIGHT. MODEL AND DETERMINISTIC TRENDS HAVE BEEN TOWARD THE WEST/MORE AMPLIFIED WITH THE SHORTWAVE VALID THU EVENING.

THE 12Z GFS IS THE WEAKEST AND MOST PROGRESSIVE WITH THE POSITIVELY TILTED TROUGH AXIS STRETCHING FROM THE MS VALLEY INTO NRN MEXICO FRI MORNING. GIVEN THE ENSEMBLE TRENDS TOWARD A SLOWER/DEEPER TROUGH AXIS...AWAY FROM THE 12Z GFS AND 00/06/12Z GEFS...DO NOT WANT TO BE ON THE FASTER EDGE OF THE MODELS. THE 12Z UKMET REPRESENTS THE MOST AMPLIFIED SIDE OF THE LATEST DETERMINISTIC MODEL SPREAD BUT IT HAS WEAKENED SOME FROM ITS 00Z CYCLE. FOR FRIDAY...THE 12Z ECMWF TRENDED SLIGHTLY WEST WITH THE NRN PORTION OF THE TROUGH AXIS AND FASTER/EAST WITH THE SRN PORTION OVER SOUTH TEXAS. THE PREVIOUSLY PREFERRED 00Z ECMWF MEAN IS CURRENTLY NEAR A BLEND OF THE 12Z ECMWF/UKMET/CMC. WHICH IS BETWEEN THE PREVIOUSLY MORE AGGRESSIVE DIGGING SEEN IN THE 00Z UKMET/ECMWF AND FLATTER/MORE PROGRESSIVE 12Z NAM/GFS.
 
theskbl17 said:
"New Euro run (12Z ECMWF) hints at a few snowflakes across parts of Central Alabama Friday morning. Temps should be above feeezing, and for now it looks like there will be little impact. More details later this afternoon..."
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Thanks!
 
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