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Winter Speculation 17/18 -December Thread


AMZ8990

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Models look less amped today.Not a big sytem as we already knew.Ratios will be a key for a bit more,only .06 BNA,bit more east,orographic spots should produce more.Here's TYS,0z GFS

 

GFS 0.5 Degree FORECAST FOR: TYS    LAT=  35.82 LON=  -83.98 ELE=   981

                                            00Z JAN14   * - 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)
SUN 00Z 14-JAN                  18.3    11.8    36006                           
SUN 06Z 14-JAN  18.3    15.7    15.8     9.9    02005           0.00       4    
SUN 12Z 14-JAN  15.8    14.6    14.8    10.2    03004           0.00      20    
SUN 18Z 14-JAN  29.4    14.5    29.4    15.1    03004           0.00      62    
MON 00Z 15-JAN  31.7    23.0    23.1    10.1    07002           0.00      67    
MON 06Z 15-JAN  24.2    22.3    23.9    12.2    23001           0.00      21    
MON 12Z 15-JAN  26.2    24.5    25.6    15.6    18001           0.00      80    
MON 18Z 15-JAN  41.1    24.6    41.1    23.7    22008           0.00      10    
TUE 00Z 16-JAN  42.4    32.0    32.1    22.2    21004           0.00       0    
TUE 06Z 16-JAN  32.1    28.6    28.7    21.9    22002           0.00       4    
TUE 12Z 16-JAN  29.4    27.3    28.7    24.1    25001           0.00      85    
TUE 18Z 16-JAN  31.0    28.6    30.4    27.2    30003     SN    0.04      98    
WED 00Z 17-JAN  30.5    24.3    24.4    22.9    32004     SN    0.11      99    
WED 06Z 17-JAN  24.2    12.9    13.1    10.9    34004           0.02      57    
WED 12Z 17-JAN  13.0     8.6     8.7     6.1    00004           0.00      25    
WED 18Z 17-JAN  21.5     8.2    21.5    14.6    01005           0.00      26    
THU 00Z 18-JAN  23.5    16.9    17.0    11.5    01003           0.00      52    
THU 06Z 18-JAN  16.9    13.4    13.5    11.0    04002           0.00       3    
THU 12Z 18-JAN  13.7    12.8    13.1    10.0    02002           0.00       1    
THU 18Z 18-JAN  31.2    13.1    31.3    17.5    03003           0.00       0    
FRI 00Z 19-JAN  33.7    23.8    23.8    13.7    09002           0.00       0    
FRI 06Z 19-JAN  24.0    22.0    22.2    13.4    22001           0.00       4  

 

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AO is going into-2 sigma around the 22nd,could stay - days after with a slight even negative EPO,Asia looks to be getting active upcoming into the 3rd week of Jan,could see the potential of another cold blast end of the month.Hopefully a system comes with it,to early to tell IMO right now

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4 minutes ago, Bango said:

Does anyone have GFS TRI soundings? (Or where one gets it?) From the maps it looked a solid 3 inches with 15 to 20:1 ratios, from roughly hour 66-76.

Just ask,i'll shoot you what you want :) if i have it,here's the GFS 0z

 

GFS 0.5 Degree FORECAST FOR: TRI    LAT=  36.47 LON=  -82.40 ELE=  1519

                                            00Z JAN14   * - 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)
SUN 00Z 14-JAN                  18.9    12.7    00005                           
SUN 06Z 14-JAN  18.9    15.1    15.1     8.9    02004           0.00      71    
SUN 12Z 14-JAN  14.9    12.1    12.1     7.0    03003           0.00      30    
SUN 18Z 14-JAN  28.8    11.8    28.8    11.8    02003           0.00      23    
MON 00Z 15-JAN  31.0    22.5    22.5     5.6    03002           0.00      97    
MON 06Z 15-JAN  22.5    20.6    20.6     7.6    11002           0.00      47    
MON 12Z 15-JAN  22.5    20.1    20.1     8.5    13002           0.00      35    
MON 18Z 15-JAN  38.4    20.2    38.4    23.3    23006           0.00      13    
TUE 00Z 16-JAN  40.5    29.0    29.1    20.6    23002           0.00       0    
TUE 06Z 16-JAN  29.1    26.4    26.5    19.6    19002           0.00       7    
TUE 12Z 16-JAN  27.2    25.6    26.8    21.8    20003           0.00      86    
TUE 18Z 16-JAN  34.6    26.9    34.5    30.9    27005     SN    0.02     100    
WED 00Z 17-JAN  34.0    27.3    27.3    25.6    28004     SN    0.11     100    
WED 06Z 17-JAN  27.2    19.9    20.0    18.1    31005     SN    0.05     100    
WED 12Z 17-JAN  19.7    10.9    10.9     8.9    32003     SN    0.01      88    
WED 18Z 17-JAN  20.1     9.5    20.0    15.3    32004           0.00      61    
THU 00Z 18-JAN  21.2    16.1    16.1    10.7    32003     SN    0.01      93    
THU 06Z 18-JAN  15.5    11.7    12.0     9.7    23002           0.00      47    
THU 12Z 18-JAN  12.2    10.2    10.2     8.0    24002           0.00      76    
THU 18Z 18-JAN  28.8    10.0    28.8    19.7    28001           0.00       3    
FRI 00Z 19-JAN  30.6    20.6    20.6     9.3    18001           0.00       0    
FRI 06Z 19-JAN  21.1    19.1    19.5     8.0    05000           0.00       0    
FRI 12Z 19-JAN  20.0    19.2    19.7     8.6    24002           0.00      59    
FRI 18Z 19-JAN  35.6    19.0    35.6    22.3    25004           0.00      10    
SAT 00Z 20-JAN  36.8    28.7    28.9    19.7    22003           0.00      61    
SAT 06Z 20-JAN  27.6    23.8    23.8    18.8    20002           0.00       2    
SAT 12Z 20-JAN  26.9    23.9    26.9    23.5    23003           0.00      56    
SAT 18Z 20-JAN  41.8    26.9    41.8    37.5    24003           0.00      81    
SUN 00Z 21-JAN  44.3    33.9    33.9    27.9    09002           0.00      35    



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45 minutes ago, Bango said:

Does anyone have GFS TRI soundings? (Or where one gets it?) From the maps it looked a solid 3 inches with 15 to 20:1 ratios, from roughly hour 66-76.

Go to pivotalweather and just click on your location for a given hour and it'll show your skew-t. They also have a ratio map. 

As he's done already, Jax is always very willing to post the text output for cities too!

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8 minutes ago, John1122 said:

Go to pivotalweather and just click on your location for a given hour and it'll show your skew-t. They also have a ratio map. 

As he's done already, Jax is always very willing to post the text output for cities too!

To add what John said,Instantweathermaps.com has the best algorithm of any maps using the GFS and Nam if you're looking at snow totals using these two models

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Euro was .1-.2 as snow for most of the forum area but more from Memphis into Northern Miss to South Arkansas. Went back to the Carolina snow event too. Pops a low off the coast almost miller B fashion. Pretty much in line with the other globals, most would see 1-2 inches, maybe some 3 inch areas, especially far east and far southwest.  A few areas of less than an inch towards Chattanooga and those areas. 

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Snow ratios still looks good,when you get to 18 degrees your ratios are 20:1

 

ECMWF Deterministic FORECAST FOR: BNA    LAT=  36.12 LON=  -86.68 ELE=   591

                                            00Z JAN14
                 2 M     2 M     2 M     SFC     SFC    6 HR    FROZN   TOTAL
                 MXT     MNT     TMP     DEW     WIND    QPF     PCP    CLOUD
                 (F)     (F)     (F)     (F)    (KTS)   (IN)    (IN)    (PCT)
SUN 00Z 14-JAN                  19.0    10.6    00005   0.00    0.00       3    
SUN 06Z 14-JAN  19.1    15.6    15.6     6.6    04004   0.00    0.00       0    
SUN 12Z 14-JAN  15.5    13.5    13.7     4.5    05004   0.00    0.00      99    
SUN 18Z 14-JAN  26.9    13.7    27.3    -1.7    06003   0.00    0.00      74    
MON 00Z 15-JAN  31.0    24.6    24.8     3.1    04002   0.00    0.00      97    
MON 06Z 15-JAN  27.0    24.3    26.4    -0.8    17004   0.00    0.00      84    
MON 12Z 15-JAN  26.6    25.1    25.2     2.3    19006   0.00    0.00      25    
MON 18Z 15-JAN  43.3    24.9    43.6    15.4    22009   0.00    0.00      21    
TUE 00Z 16-JAN  46.5    34.6    34.3    23.8    29004   0.00    0.00      88    
TUE 06Z 16-JAN  34.3    27.0    27.8    23.7    33006   0.00    0.00      98    
TUE 12Z 16-JAN  27.9    20.4    20.3     8.3    35007   0.03    0.03     100    
TUE 18Z 16-JAN  20.2    18.3    18.7     5.7    33005   0.05    0.05     100    
WED 00Z 17-JAN  19.2    15.1    15.3     0.1    34005   0.03    0.03      74    
WED 06Z 17-JAN  15.4    10.7    10.7    -5.2    35005   0.00    0.00       0    
WED 12Z 17-JAN  10.7     8.2     8.2    -4.5    33004   0.00    0.00       5    
WED 18Z 17-JAN  23.1     7.7    23.4     2.3    34005   0.00    0.00      31    
THU 00Z 18-JAN  25.9    20.1    20.0     5.8    32005   0.00    0.00       0    
THU 06Z 18-JAN  20.0    15.5    15.4     6.2    28003   0.00    0.00       0    
THU 12Z 18-JAN  15.5    13.9    14.4     4.7    24003   0.00    0.00       0    
THU 18Z 18-JAN  33.7    13.9    34.1     0.4    19002   0.00    0.00       0  
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Still looks like a weak system,couple inches somewhere but it's snow and no mixing

 

ECMWF Deterministic FORECAST FOR: TYS    LAT=  35.82 LON=  -83.98 ELE=   981

                                            00Z JAN14
                 2 M     2 M     2 M     SFC     SFC    6 HR    FROZN   TOTAL
                 MXT     MNT     TMP     DEW     WIND    QPF     PCP    CLOUD
                 (F)     (F)     (F)     (F)    (KTS)   (IN)    (IN)    (PCT)
SUN 00Z 14-JAN                  17.6     6.7    36008   0.00    0.00      11    
SUN 06Z 14-JAN  17.6    13.2    13.2     2.8    02005   0.00    0.00       1    
SUN 12Z 14-JAN  13.3    12.4    12.6     2.1    02004   0.00    0.00       0    
SUN 18Z 14-JAN  27.6    12.5    27.8    -2.9    02004   0.00    0.00      99    
MON 00Z 15-JAN  30.4    21.7    21.8    -4.1    08003   0.00    0.00      88    
MON 06Z 15-JAN  23.6    19.2    22.4     0.9    13002   0.00    0.00      27    
MON 12Z 15-JAN  26.7    21.6    26.4     5.8    19003   0.00    0.00      58    
MON 18Z 15-JAN  42.2    25.1    42.4    14.5    22008   0.00    0.00       0    
TUE 00Z 16-JAN  44.6    33.7    33.6    18.5    21006   0.00    0.00       4    
TUE 06Z 16-JAN  33.6    28.7    28.6    22.3    22004   0.00    0.00       0    
TUE 12Z 16-JAN  28.8    24.6    25.7    22.4    04002   0.00    0.00      75    
TUE 18Z 16-JAN  33.1    25.6    32.7    21.9    33003   0.01    0.01      98    
WED 00Z 17-JAN  32.9    24.2    24.1    18.4    35004   0.09    0.09      99    
WED 06Z 17-JAN  24.1    19.0    18.8    10.2    35006   0.04    0.04      98    
WED 12Z 17-JAN  18.8    11.4    11.3    -1.2    36006   0.01    0.01      68    
WED 18Z 17-JAN  21.3    10.6    21.5    -2.6    35007   0.00    0.00       1    
THU 00Z 18-JAN  23.9    18.0    17.9     2.7    35004   0.00    0.00       3    
THU 06Z 18-JAN  17.9    14.7    14.7     4.4    02002   0.00    0.00       0

 

 

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CMWF Deterministic FORECAST FOR: TRI    LAT=  36.47 LON=  -82.40 ELE=  1519

                                            00Z JAN14
                 2 M     2 M     2 M     SFC     SFC    6 HR    FROZN   TOTAL
                 MXT     MNT     TMP     DEW     WIND    QPF     PCP    CLOUD
                 (F)     (F)     (F)     (F)    (KTS)   (IN)    (IN)    (PCT)
SUN 00Z 14-JAN                  17.0     6.0    35006   0.00    0.00      11    
SUN 06Z 14-JAN  17.0    13.6    13.5     2.0    01004   0.00    0.00      56    
SUN 12Z 14-JAN  13.6    11.9    11.9    -0.2    02004   0.00    0.00       0    
SUN 18Z 14-JAN  27.1    11.7    27.4    -7.4    02002   0.00    0.00     100    
MON 00Z 15-JAN  30.1    23.3    23.4    -1.2    34001   0.00    0.00      71    
MON 06Z 15-JAN  23.6    18.4    19.5     1.4    13006   0.00    0.00       0    
MON 12Z 15-JAN  23.2    19.3    22.6     4.9    14003   0.00    0.00      89    
MON 18Z 15-JAN  39.3    22.6    39.5    12.7    23005   0.00    0.00       1    
TUE 00Z 16-JAN  41.8    31.2    31.5    16.3    21005   0.00    0.00      18    
TUE 06Z 16-JAN  31.6    26.7    27.2    16.7    23003   0.00    0.00       4    
TUE 12Z 16-JAN  27.4    25.5    25.7    19.3    21003   0.00    0.00      88    
TUE 18Z 16-JAN  35.7    25.5    35.7    22.7    27004   0.00    0.00      98    
WED 00Z 17-JAN  35.8    28.2    28.1    25.1    28004   0.06    0.06     100    
WED 06Z 17-JAN  28.1    21.9    21.8    15.6    35003   0.10    0.10     100    
WED 12Z 17-JAN  21.8    15.7    15.5     8.2    35004   0.03    0.03      87    
WED 18Z 17-JAN  20.4    13.8    20.5     0.7    31005   0.00    0.00      14    
THU 00Z 18-JAN  22.2    16.4    16.4     2.8    33006   0.00    0.00      72    
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ECMWF Deterministic FORECAST FOR: CHA    LAT=  35.03 LON=  -85.20 ELE=   689

                                            00Z JAN14
                 2 M     2 M     2 M     SFC     SFC    6 HR    FROZN   TOTAL
                 MXT     MNT     TMP     DEW     WIND    QPF     PCP    CLOUD
                 (F)     (F)     (F)     (F)    (KTS)   (IN)    (IN)    (PCT)
SUN 00Z 14-JAN                  21.8     9.7    35008   0.00    0.00       0    
SUN 06Z 14-JAN  21.8    16.3    16.3     5.6    01007   0.00    0.00       0    
SUN 12Z 14-JAN  16.3    14.8    14.8     2.5    02006   0.00    0.00      82    
SUN 18Z 14-JAN  31.0    14.8    31.3    -1.0    02004   0.00    0.00      16    
MON 00Z 15-JAN  34.8    26.5    26.3     2.4    06002   0.00    0.00       1    
MON 06Z 15-JAN  26.7    23.9    24.8     3.5    20003   0.00    0.00      73    
MON 12Z 15-JAN  27.5    24.7    26.5     9.7    18005   0.00    0.00      37    
MON 18Z 15-JAN  42.7    26.2    42.9    16.3    20007   0.00    0.00       0    
TUE 00Z 16-JAN  45.2    34.9    35.0    21.4    20006   0.00    0.00       0    
TUE 06Z 16-JAN  35.0    29.5    29.4    24.0    20004   0.00    0.00       0    
TUE 12Z 16-JAN  29.8    26.7    27.6    24.6    35004   0.00    0.00      74    
TUE 18Z 16-JAN  35.2    27.5    35.0    23.9    34004   0.00    0.00      96    
WED 00Z 17-JAN  35.0    25.0    24.9    18.2    34005   0.07    0.07      99    
WED 06Z 17-JAN  24.9    18.8    18.6     8.9    34007   0.03    0.03     100    
WED 12Z 17-JAN  18.6    11.6    11.6    -1.3    34007   0.00    0.00       5    
WED 18Z 17-JAN  24.0    11.3    24.2    -0.5    35008   0.00    0.00       0    
THU 00Z 18-JAN  27.2    21.6    21.5     4.6    33007   0.00    0.00       0    
THU 06Z 18-JAN  21.5    18.3    18.3     6.0    34004   0.00    0.00      
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I think this one is thread worthy for future reference sake. I enjoy going back and looking through these threads in summer to be honest. Every global is now on board and the hi-res models in range are also on board with a wide spread 1-3 inch type event for a large portion of the forum. So anyone who'd like can feel free to fire one up imo.

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It is the Euro and NAM versus everyone one else. 6z GFS, NAVGEM, CMC, ICON, etc are dry as a bone. The NAM/Euro combo used to be very reliable but of course for us it probably will cave to the rest of the models. I haven’t seen the presentation of the H5 trough change dramatically since yesterday which means we may be honing in on this event.

My prediction is a widespread 1-3 inch event from Nashville east to the mountains with favored upslope spots on the Plateau (aka John) and the mountains squeezing out 2-4 of high ratio/fluffy snow. I would include Chatty in this as well. I would guess a dusting to an inch for those places west of Nashville.

I still think slightly bigger storm is on the table especially if you trough can swing to a negative tilt in the Plains/Mid South or if there is more energy rounding the base of the trough. But time is running out for major changes.

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Probably. We started a thread for the event. When we mention Memphis you can loosely extrapolate your way, with this system only. Welcome to our Region. Come back often!

On ‎01‎/‎13‎/‎2018 at 12:23 PM, Will (little rock) said:

The models look decent for Central-South Arkansas, What are your guy's thoughts?

 

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Your run of the mill 10 inch rain storm lol.  There are serious hurricanes that don’t get close to that...had that been modeled as snow I would of framed it as the most absurd clown map in the history of clowns...

90CC219E-E323-4EDB-A710-41367D1722C6.jpeg

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20 minutes ago, Bango said:

Your run of the mill 10 inch rain storm lol.  There are serious hurricanes that don’t get close to that...had that been modeled as snow I would of framed it as the most absurd clown map in the history of clowns...

90CC219E-E323-4EDB-A710-41367D1722C6.jpeg

Yea will have to see if that holds. Hopefully that stays all rain. That much moisture as ice or snow would not be good in the South.

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3 minutes ago, weathertree4u said:

Yea will have to see if that holds. Hopefully that stays all rain. That much moisture as ice or snow would not be good in the South.

For example, not sure how the CFS is for reliability, but it is not really indicating any major warmups with some very cold air lurking near the TN Valley though mid Feb.

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