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1/5/17-1/8/17 Southern System.


John1122

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7 minutes ago, Wurbus said:

NAM-3K sets up a nice snow band across East TN and the mountains. The low is also north of the 18z run.

 

nam3km_ref_frzn_seus_45.png

That pic reminds me of the storm that shut down Atlanta and Birmingham a few years back.  Several days before the storm, it looked like it would miss East TN.  Then the day before, models starting picking up on a band of snow over East TN separate from the main band to our south--and it verified.  We got about 3 inches of very dry powder out of it here.  And, again, that pic looks amazingly like the radar did during that snow event. 

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4 minutes ago, John1122 said:

If that unfolds it'll be historic. Atlanta almost never exceeds 3 inches of snow. 1st time since 1973 a storm tracked that far south with the current NAO/AO configuration.  Basically a 1 in 50 year type event. 

GFS 0.5 Degree FORECAST FOR: FTY    LAT=  33.77 LON=  -84.52 ELE=   840

                                            00Z JAN05   * - APPROXIMATED
                 SFC     SFC     2 M     SFC     SFC     SFC    6 HR    TOTAL
                 MXT     MNT     TMP     DEW     WIND    PCP     QPF    CLOUD
                 (F)     (F)     (F)     (F)    (KTS)   TYPES   (IN)    (PCT)
THU 00Z 05-JAN                  41.7    34.7    32005                           
THU 06Z 05-JAN  41.8    35.2    35.2    29.1    34004           0.00     100    
THU 12Z 05-JAN  35.1    31.2    31.5    23.9    06001           0.00      21    
THU 18Z 05-JAN  50.5    31.7    50.5    37.7    20005           0.00      33    
FRI 00Z 06-JAN  51.9    41.0    40.9    34.8    29004           0.00      37    
FRI 06Z 06-JAN  40.9    35.5    35.4    29.1    31006           0.00      69    
FRI 12Z 06-JAN  35.5    29.6    29.6    24.3    32006           0.00      86    
FRI 18Z 06-JAN  39.0    29.3    39.0    27.0    33007           0.00      78    
SAT 00Z 07-JAN  40.3    32.9    33.0    26.7    33008     SN    0.01      87    
SAT 06Z 07-JAN  32.8    27.7    27.7    26.4    33007     SN    0.32     100    
SAT 12Z 07-JAN  27.6    22.8    22.8    20.4    33009     SN    0.13      80 
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6 minutes ago, AMZ8990 said:

Gotta think we're all still in for some adjustments come tomorrow.  Should make things interesting as the day unfolds!

There will be adjustments for sure and possibly some surprises.  Euro will be interesting tonight.  Then we're in hi-res nam/rgem/sref/hrrr territory with some wrf loops thrown in for good measure.  Best part of winter!  (even if it doesn't pan out for the backyard).

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let's see here on the 0z German, Latitude 37N, 82W in this almost idealistic model run in my case I am in the third tier of green on the key. Considering I'm within the center of it I can use the median of 17.5mm of precip which translates to 0.68 in of rain then if I assume a snow ratio for this instance let's say 12:1 then if my calculations are correct I get a grand total of 8.16 inches of snow which is pretty great! (did I do it right?)

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13 minutes ago, Touchet said:

I'm about to get dramatic here. But why is it the Bham always ends up dry?  Please someone calm me down. 

Unfortunately the storm develops late and that's why it's good for Atlanta and East of there. The only chance western areas have are if there's earlier development in the Gulf. That said, Birmingham is in a decent spot and models often under perform moisture with gulf systems. So don't give up hope yet. 

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