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2016-2017 Great Tennessee Valley Winter Discussion


John1122

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Models are coming back warmer today,trending a more wetter scenario than frozen.The control shift concerns me.It went from frozen to seeing a more strong cold front with thunder possibly,next Friday afternoon


I honestly don't like the control . it flips over and over. look at the last 5 runs. big shifts in all directions .

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Models are coming back warmer today,trending a more wetter scenario than frozen.The control shift concerns me.It went from frozen to seeing a more strong cold front with thunder possibly,next Friday afternoon


I honestly don't like the control . it flips over and over. look at the last 5 runs. big shifts in all directions .

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GFS 0.5 Degree FORECAST FOR: BNA    LAT=  36.12 LON=  -86.68 ELE=   591

                                            00Z DEC31   * - APPROXIMATED
                 2 M     850     SFC     SFC     700    6 HR     500    1000 
                 TMP     TMP     PRS     RHU     RHU     QPF     HGT     500 
                 (C)     (C)    (MB)    (PCT)   (PCT)   (IN)    (DM)     THK 
SAT 00Z 31-DEC   1.3    -1.0    1023      78      44             563     544    
SAT 06Z 31-DEC   1.7     4.0    1020      80      32    0.00     564     547    
SAT 12Z 31-DEC   3.1     3.2    1019      74      99    0.01     562     547    
SAT 18Z 31-DEC   4.2     1.7    1017      92     100    0.20     562     548    
SUN 00Z 01-JAN   5.7     3.5    1017      96      99    0.13     563     550    
SUN 06Z 01-JAN   6.6     4.1    1017      99      21    0.07     566     552    
SUN 12Z 01-JAN   6.9     6.6    1018      99      21    0.02     569     554    
SUN 18Z 01-JAN   8.5     8.7    1018      98      58    0.03     571     556    
MON 00Z 02-JAN  10.5     8.6    1019      99      37    0.02     572     557    
MON 06Z 02-JAN  10.9    11.2    1019      99      45    0.00     574     558    
MON 12Z 02-JAN  12.1    11.1    1018      99      66    0.01     574     558    
MON 18Z 02-JAN  17.9    12.4    1017      91      83    0.07     574     561    
TUE 00Z 03-JAN  16.7    11.4    1011      97      95    0.33     571     561    
TUE 06Z 03-JAN  16.8     9.8    1008      97      45    0.26     570     562    
TUE 12Z 03-JAN  14.8     9.9    1011      97       7    0.03     569     560    
TUE 18Z 03-JAN  13.4     5.6    1013      94      12    0.02     566     554    
WED 00Z 04-JAN   7.5     3.9    1016      92      37    0.00     562     548    
WED 06Z 04-JAN   0.9     0.4    1022      82      40    0.00     559     541    
WED 12Z 04-JAN  -2.1    -3.7    1024      71      40    0.00     555     536    
WED 18Z 04-JAN   1.3    -6.4    1025      45      25    0.00     554     534    
THU 00Z 05-JAN  -1.7    -7.1    1025      57      31    0.00     553     533    
THU 06Z 05-JAN  -3.1    -5.7    1025      50      58    0.00     551     531    
THU 12Z 05-JAN  -2.3    -9.0    1025      42      99    0.00     548     529    
THU 18Z 05-JAN   1.6   -10.9    1023      50      86    0.00     545     526    
FRI 00Z 06-JAN  -1.0   -11.5    1023      69       5    0.00     544     526    
FRI 06Z 06-JAN  -3.8   -12.2    1025      76      24    0.00     547     527    
FRI 12Z 06-JAN  -6.2   -10.5    1029      48      12    0.00     550     528    
FRI 18Z 06-JAN   0.0    -8.2    1029      25      34    0.00     554     531    
SAT 00Z 07-JAN  -1.8    -5.8    1029      34      96    0.00     557     535    
SAT 06Z 07-JAN  -2.4    -4.8    1028      45      97    0.00     560     537    
SAT 12Z 07-JAN  -3.5    -3.4    1028      88      99    0.07     561     539    
SAT 18Z 07-JAN  -0.6    -0.1    1023      97      98    0.34     561     542    
SUN 00Z 08-JAN  -0.4    -1.4    1021      98      98    0.15     556     539    
SUN 06Z 08-JAN  -1.8    -1.1    1024      99      70    0.12     557     538    
SUN 12Z 08-JAN  -3.1     0.1    1027      99       6    0.00     562     541    
SUN 18Z 08-JAN  -0.8     3.1    1028      97       8    0.00     568     546    
MON 00Z 09-JAN  -1.2     5.2    1027      98      19    0.01     570     549    
MON 06Z 09-JAN  -3.1     7.3    1025      98      40    0.00     572     552    
MON 12Z 09-JAN  -3.8     8.2    1024      98      38    0.00     573     554    
MON 18Z 09-JAN   1.1     9.0    1021     100      47    0.00     573     556    
TUE 00Z 10-JAN   1.5     6.5    1019     100      62    0.01     572     557
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lol.some mixing maybe from the warm nose

 

GFS 0.5 Degree FORECAST FOR: CHA    LAT=  35.03 LON=  -85.20 ELE=   689

                                            00Z DEC31   * - APPROXIMATED
                 2 M     850     SFC     SFC     700    6 HR     500    1000 
                 TMP     TMP     PRS     RHU     RHU     QPF     HGT     500 
                 (C)     (C)    (MB)    (PCT)   (PCT)   (IN)    (DM)     THK 
SAT 00Z 31-DEC   1.2    -2.0    1024      76      44             565     545    
SAT 06Z 31-DEC   0.2     2.9    1023      75      31    0.00     566     548    
SAT 12Z 31-DEC   2.1     4.3    1022      70      57    0.00     565     547    
SAT 18Z 31-DEC   3.8     1.9    1020      83      99    0.05     565     548    
SUN 00Z 01-JAN   4.1     3.9    1019      97      99    0.11     567     551    
SUN 06Z 01-JAN   5.4     6.7    1019      98      99    0.08     569     553    
SUN 12Z 01-JAN   6.7     8.6    1019      99      57    0.06     572     556    
SUN 18Z 01-JAN   8.9     9.2    1020      98      80    0.10     574     557    
MON 00Z 02-JAN   9.5     9.3    1020      99      75    0.01     575     558    
MON 06Z 02-JAN  10.1    10.9    1021      99      67    0.04     577     559    
MON 12Z 02-JAN  11.4    11.0    1021      99      80    0.07     577     559    
MON 18Z 02-JAN  14.8    11.2    1020      97      91    0.13     577     561    
TUE 00Z 03-JAN  14.7    11.2    1016      98      75    0.03     575     562    
TUE 06Z 03-JAN  15.8    11.0    1011      98      38    0.71     572     562    
TUE 12Z 03-JAN  14.9     9.4    1012      98       5    0.02     573     563    
TUE 18Z 03-JAN  15.3     8.5    1013      90       4    0.01     570     559    
WED 00Z 04-JAN  11.6     6.2    1014      98      30    0.02     567     555    
WED 06Z 04-JAN   4.1     3.1    1019      90      33    0.00     564     548    
WED 12Z 04-JAN  -0.4     0.4    1023      85      21    0.00     560     543    
WED 18Z 04-JAN   3.5    -3.5    1023      52      33    0.00     558     540    
THU 00Z 05-JAN  -1.1    -4.7    1024      68      37    0.00     557     537    
THU 06Z 05-JAN  -2.4    -3.1    1025      63      55    0.00     555     536    
THU 12Z 05-JAN  -2.9    -3.7    1024      55      99    0.00     554     535    
THU 18Z 05-JAN   1.9    -6.2    1023      38      98    0.00     550     532    
FRI 00Z 06-JAN  -1.2    -8.6    1023      66      23    0.00     550     533    
FRI 06Z 06-JAN  -3.3    -9.2    1025      78      14    0.00     552     532    
FRI 12Z 06-JAN  -4.4    -7.6    1028      77      20    0.00     554     532    
FRI 18Z 06-JAN   1.6    -5.8    1028      23      65    0.00     558     536    
SAT 00Z 07-JAN  -0.1    -3.1    1028      30      96    0.00     561     539    
SAT 06Z 07-JAN  -1.0    -2.1    1028      35      99    0.00     563     541    
SAT 12Z 07-JAN  -2.9    -4.4    1029      80      98    0.05     565     542    
SAT 18Z 07-JAN   0.0    -1.1    1024     100     100    0.99     564     545    
SUN 00Z 08-JAN   0.2     2.2    1020     100     100    0.94     560     544    
SUN 06Z 08-JAN  -0.2    -0.6    1021     100      93    0.27     556     539    
SUN 12Z 08-JAN  -1.6     0.2    1024      99      11    0.01     560     541    
SUN 18Z 08-JAN   0.3     2.9    1026     100       5    0.00     567     546    
MON 00Z 09-JAN   0.0     6.1    1026      99      14    0.01     571     550    
MON 06Z 09-JAN  -6.9     7.0    1027      99      20    0.00     572     551    
MON 12Z 09-JAN  -1.6     7.5    1026     100      41    0.00     574     553    
MON 18Z 09-JAN   0.4     8.8    1024     100      44    0.00     575     555    
TUE 00Z 10-JAN   0.4     9.5    1021     100      71    0.01     574     557    
TUE 12Z 10-JAN   1.2     4.0    1018     100      49    0.03     573     558    
WED 00Z 11-JAN   2.9     6.3    1018     100      40    0.02     574     559    
WED 12Z 11-JAN                                                       
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GFS 0.5 Degree FORECAST FOR: TYS    LAT=  35.82 LON=  -83.98 ELE=   981

                                            00Z DEC31   * - APPROXIMATED
                 2 M     850     SFC     SFC     700    6 HR     500    1000 
                 TMP     TMP     PRS     RHU     RHU     QPF     HGT     500 
                 (C)     (C)    (MB)    (PCT)   (PCT)   (IN)    (DM)     THK 
SAT 00Z 31-DEC  -0.6    -4.1    1023      80      48             561     542    
SAT 06Z 31-DEC  -0.6     0.3    1023      73      32    0.00     564     545    
SAT 12Z 31-DEC  -0.4     3.4    1021      61      25    0.00     563     545    
SAT 18Z 31-DEC   6.1     0.4    1020      56      99    0.02     563     547    
SUN 00Z 01-JAN   3.5     2.1    1019      91      99    0.03     564     549    
SUN 06Z 01-JAN   4.1     4.9    1019      97      99    0.11     567     551    
SUN 12Z 01-JAN   5.6     6.7    1020      97      76    0.04     570     553    
SUN 18Z 01-JAN   8.8     8.3    1021      95      99    0.02     573     556    
MON 00Z 02-JAN   8.1     9.3    1022      97      57    0.03     575     557    
MON 06Z 02-JAN   9.4    10.1    1022      97      71    0.03     576     558    
MON 12Z 02-JAN  10.0    10.3    1022      97      64    0.02     577     559    
MON 18Z 02-JAN  14.2    10.9    1021      94      98    0.11     577     560    
TUE 00Z 03-JAN  12.3    11.0    1017      98      86    0.04     576     562    
TUE 06Z 03-JAN  13.6    11.4    1012      97      99    0.32     571     561    
TUE 12Z 03-JAN  14.8    10.2    1010      98      53    0.09     571     563    
TUE 18Z 03-JAN  15.8     7.2    1012      88      10    0.02     568     558    
WED 00Z 04-JAN  10.9     5.5    1013      98      29    0.02     564     553    
WED 06Z 04-JAN   3.9     1.5    1017      90      42    0.01     561     546    
WED 12Z 04-JAN  -0.9    -2.9    1021      87      29    0.00     557     540    
WED 18Z 04-JAN   1.9    -8.2    1021      56      20    0.00     555     537    
THU 00Z 05-JAN  -2.3    -8.2    1023      67      21    0.00     553     534    
THU 06Z 05-JAN  -3.8    -6.5    1024      59      41    0.00     552     533    
THU 12Z 05-JAN  -3.9    -5.9    1024      49      94    0.00     551     532    
THU 18Z 05-JAN  -0.2    -8.6    1022      49      98    0.00     547     529    
FRI 00Z 06-JAN  -1.5    -9.2    1022      64       6    0.00     545     528    
FRI 06Z 06-JAN  -4.4   -11.9    1024      84      13    0.00     547     528    
FRI 12Z 06-JAN  -6.1   -11.7    1027      83      13    0.00     550     528    
FRI 18Z 06-JAN   0.8    -9.4    1027      22      12    0.00     554     532    
SAT 00Z 07-JAN  -2.6    -5.0    1029      30      60    0.00     558     535    
SAT 06Z 07-JAN  -2.2    -4.5    1029      35      99    0.00     560     537    
SAT 12Z 07-JAN  -2.0    -5.8    1030      45      99    0.00     562     539    
SAT 18Z 07-JAN  -0.9    -0.6    1027      97      99    0.31     563     542    
SUN 00Z 08-JAN  -0.7     0.1    1022      99      99    0.53     560     543    
SUN 06Z 08-JAN  -1.2    -0.7    1022      99      99    0.18     556     538    
SUN 12Z 08-JAN  -3.3    -3.4    1024     100      51    0.02     557     537   
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I swear it seems like the Para is leading the way on the models. Whatever it shows 6-12 hours before the next OP run seems to happen. It was super suppressed, then modeling went that way. It was amped up and north and the op went that way, today it was back to a good hit and the op went that way. It's doing well at 500, right alongside the Euro in verification scores, trailing one ENS models.

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5 minutes ago, John1122 said:

I swear it seems like the Para is leading the way on the models. Whatever it shows 6-12 hours before the next OP run seems to happen. It was super suppressed, then modeling went that way. It was amped up and north and the op went that way, today it was back to a good hit and the op went that way. It's doing well at 500, right alongside the Euro in verification scores, trailing one ENS models.

Really hoping the ensembles agree with the OP runs from the GFS and GEM

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1 minute ago, John1122 said:

8-12 over Hamilton County that run. Also upwards of 1/2 inch of freezing rain. Would be an all time type winter event if it were to verify.

This storm's 'look' reminds of Feb '14 storm, where we got about 8 inches... although that one came after a long stint of very cold weather. 

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I Kuchera higher than  10:1 in that run. Southern areas Kuchera slightly lower. 10:1 is 10-14 inches over the Southern Valley. 8-12 Kuchera. I'm 6-8 10:1 and 8-10 Kuchera. Temps across my area are in the  mid 20s during the event as modeled with 850s getting to around 30.  Southern Valley gets to right at 32 and has a period of 850s around 35 for some mix issues.

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