• Hello, please take a minute to check out our awesome content, contributed by the wonderful members of our community. We hope you'll add your own thoughts and opinions by making a free account!

Wintry December 28-29th Possible Winter Storm

18z Canadian:

I_nw_EST_2017122412_113.png
Is the 18z Canadian model stronger than 12z Canadian run
 
The high resolution global German model (DWD-ICON) held serve, and produced a big, snow/ice storm for the Carolinas & GA, a coastal low developed off the mid-atlantic coast and dropped significant snow along the I-95 corridor. It's much further NW of most guidance atm.
Gave areas in/around Fayetteville, NC accumulating snow w/ the system on the 27th
Screen Shot 2017-12-24 at 4.54.08 PM.png
Screen Shot 2017-12-24 at 4.57.36 PM.png
Screen Shot 2017-12-24 at 4.57.51 PM.png
 

Attachments

  • Screen Shot 2017-12-24 at 4.55.18 PM.png
    Screen Shot 2017-12-24 at 4.55.18 PM.png
    753.1 KB · Views: 47
With the Jan system this year it was the most amped (and warmest) and held serve. I believe it picked up on that trend even before the NAM did.

Yeah, I definitely noticed, the model is pretty respectable. Worth mentioning that the German model's resolution is highest of any global model atm (even higher than the ECMWF) and its slow physics scheme is imported from ECMWF.
 
Do we have any verification scores for at least precipitation amounts/verification / 500mb or something for German Model?
 
Last edited:
Oh believe me, FFC used to be worse with conservatism, I actually think they sometimes get too bold now but the bottom line is, unless we see a lot of change from the models, that forecast will change...

I just hope the CMC is right as I really don't want an ice storm, but I'd like to see sleet. I'd be good with a glaze too but anything much more than that will be a headache.
 
NAM by 84, showing our moisture and icy spots around N.LA
 
Oh believe me, FFC used to be worse with conservatism.
FFC tends to be conservative because so many schools/businesses/organizations in metro Atlanta - heck, even here in Athens - link their inclement weather policies directly to NWS watches/warnings (at least that was the case when I was responsible for risk management at a corporate travel company in Atlanta from 2001-2008). In fact public school districts tend to use such NWS advisories as the sole trigger for class cancellations...so you better be danged sure you're right if you make a prediction that disrupts the lives and commerce of a metroplex containing six million people. I don't envy their job one single bit.
 
So, for my Midlands of SC friends. This is the German model output for Lexington, SC. This should give you an idea of a worst case scenario for your areas if it were to verify: 1.41 inches of liquid as icy.


german-model.png
 
FFC tends to be conservative because so many schools/businesses/organizations in metro Atlanta - heck, even here in Athens - link their inclement weather policies directly to NWS watches/warnings (at least that was the case when I was responsible for risk management at a corporate travel company in Atlanta from 2001-2008). In fact public school districts tend to use such NWS advisories as the sole trigger for class cancellations...so you better be danged sure you're right if you make a prediction that disrupts the lives and commerce of a metroplex containing six million people. I don't envy their job one single bit.
There are some counties that are on school break
 
The NAM is agreeing that cold will not be an issue for most areas, even Coastal SC & Southern GA. Bad signs, unless you want a ZR monster.
 
That would go along with what I was saying earlier about the model resolution needed to try and resolve all the vorticity. Let's see if it holds haha!
Check out the images from the nam I posted. That screams wedge. And building in
 
So, for my Midlands of SC friends. This is the German model output for Lexington, SC. This should give you an idea of a worst case scenario for your areas if it were to verify: 1.41 inches of liquid as icy.


german-model.png
What about the Anderson sc area
 
No offense to anyone on here , but most of you were not born yet, but the January 8th ice storm of 1973 in ATL and NGA was utterly epic and possibly may never be repeated again..26 degrees for a week, and continuous waves of rain..Deforestation was massive, power out at my parents house for 17 days and no water..I have had a lot of Champagne tonight but will never forget that one even when I am drooling in a nursing home...LOL
 
Back
Top