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Jan 25th Winter Weather Discussion Thread


Marion_NC_WX

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GFS still kills the QPF in the carolinas compared to places further west. If the GFS verifies north GA would have some issues on Friday with ice and that amount of QPF.

gfs is nam like on qpf for the sw mtns. Over .50 qpf falls on both models and mostly freezing rain with temps in the 20's near Franklin the whole time per the nam. It could get ugly
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you know, can't we just get some snow in here and drop all the freezing rain. I would have thought with the north energy digging further south was a good thing for us. more snow than rain or sleet. is this not right?

its a stronger low and it brings in warm air above 5000ft. So its snow to sleet to freezing rain.
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Both GFS and NAM say NE GA will get a winter storm of the ice variety.  Both NAM and GFS have temps of 26-27 at the surface at 1pm Friday for the areas NE of ATL near the mountains. 

 

Date: 54 hour AVN valid 18Z FRI 25 JAN 13Station: 34.59,-83.93Latitude:   34.59Longitude: -83.93-------------------------------------------------------------------------------LEV PRES  HGHT  TEMP  DEWP  RH  DD   WETB DIR SPD THETA THE-V THE-W THE-E   W     mb     m     C     C    %   C     C  deg knt   K     K     K     K    g/kg-------------------------------------------------------------------------------  0 1000   188                                                                 SFC  964   480  -3.2  -6.0  81  2.8  -4.1 146   5 272.8 273.2 271.0 279.8  2.53  2  950   595  -4.6  -6.5  86  1.9  -5.3 154   6 272.5 272.9 270.7 279.2  2.46  3  900  1019  -3.4  -3.7  98  0.3  -3.5 203  23 278.0 278.5 275.1 287.0  3.23  4  850  1479   3.6   3.5  99  0.2   3.5 228  48 290.0 291.0 284.0 306.5  5.78  5  800  1973   3.5   3.2  98  0.3   3.3 242  55 294.9 295.9 286.2 312.4  6.01  6  750  2495   1.2   0.8  97  0.4   1.0 249  57 297.9 298.9 286.7 314.0  5.43  7  700  3048  -1.7  -2.1  97  0.4  -1.9 253  58 300.6 301.5 287.0 314.8  4.69  8  650  3635  -4.5  -5.2  95  0.7  -4.8 262  64 303.8 304.6 287.5 316.1  3.99  9  600  4262  -7.9  -8.7  94  0.8  -8.2 269  70 306.9 307.6 287.8 317.3  3.30 10  550  4934 -11.6 -12.1  96  0.5 -11.8 275  72 310.3 310.8 288.5 319.1  2.76 11  500  5659 -15.7 -16.2  96  0.4 -15.9 277  74 313.9 314.3 289.0 321.0  2.17 12  450  6447 -19.8 -20.5  94  0.7 -20.0 272  74 318.3 318.7 289.9 323.9  1.66 13  400  7315 -23.7 -24.8  91  1.0 -24.0 265  87 324.1 324.4 291.3 328.6  1.28 14  350  8278 -30.8 -31.5  93  0.7 -30.9 264  93 327.3 327.4 291.7 330.1  0.79 15  300  9355 -38.3 -38.6  97  0.3 -38.3 267 102 331.4 331.5 292.6 333.1  0.45 16  250 10580 -49.2 -49.2 100  0.0 -49.2 270 112 332.9 333.0 292.7 333.6  0.17 17  200 12009 -58.3 -59.5  86  1.2 -58.3 279 123 340.5 340.5 294.5 340.8  0.06

what a waste.  to get temps like that 26-27 and not get a good snow storm.  lets get this to snow not freezing rain. :cry:

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Both GFS and NAM say NE GA will get a winter storm of the ice variety.  Both NAM and GFS have temps of 26-27 at the surface at 1pm Friday for the areas NE of ATL near the mountains. 

 

Date: 54 hour AVN valid 18Z FRI 25 JAN 13Station: 34.59,-83.93Latitude:   34.59Longitude: -83.93-------------------------------------------------------------------------------LEV PRES  HGHT  TEMP  DEWP  RH  DD   WETB DIR SPD THETA THE-V THE-W THE-E   W     mb     m     C     C    %   C     C  deg knt   K     K     K     K    g/kg-------------------------------------------------------------------------------  0 1000   188                                                                 SFC  964   480  -3.2  -6.0  81  2.8  -4.1 146   5 272.8 273.2 271.0 279.8  2.53  2  950   595  -4.6  -6.5  86  1.9  -5.3 154   6 272.5 272.9 270.7 279.2  2.46  3  900  1019  -3.4  -3.7  98  0.3  -3.5 203  23 278.0 278.5 275.1 287.0  3.23  4  850  1479   3.6   3.5  99  0.2   3.5 228  48 290.0 291.0 284.0 306.5  5.78  5  800  1973   3.5   3.2  98  0.3   3.3 242  55 294.9 295.9 286.2 312.4  6.01  6  750  2495   1.2   0.8  97  0.4   1.0 249  57 297.9 298.9 286.7 314.0  5.43  7  700  3048  -1.7  -2.1  97  0.4  -1.9 253  58 300.6 301.5 287.0 314.8  4.69  8  650  3635  -4.5  -5.2  95  0.7  -4.8 262  64 303.8 304.6 287.5 316.1  3.99  9  600  4262  -7.9  -8.7  94  0.8  -8.2 269  70 306.9 307.6 287.8 317.3  3.30 10  550  4934 -11.6 -12.1  96  0.5 -11.8 275  72 310.3 310.8 288.5 319.1  2.76 11  500  5659 -15.7 -16.2  96  0.4 -15.9 277  74 313.9 314.3 289.0 321.0  2.17 12  450  6447 -19.8 -20.5  94  0.7 -20.0 272  74 318.3 318.7 289.9 323.9  1.66 13  400  7315 -23.7 -24.8  91  1.0 -24.0 265  87 324.1 324.4 291.3 328.6  1.28 14  350  8278 -30.8 -31.5  93  0.7 -30.9 264  93 327.3 327.4 291.7 330.1  0.79 15  300  9355 -38.3 -38.6  97  0.3 -38.3 267 102 331.4 331.5 292.6 333.1  0.45 16  250 10580 -49.2 -49.2 100  0.0 -49.2 270 112 332.9 333.0 292.7 333.6  0.17 17  200 12009 -58.3 -59.5  86  1.2 -58.3 279 123 340.5 340.5 294.5 340.8  0.06

Yep, I don't see the 85 corridor getting above freezing during the entire thing. However, there could be a sharp cutoff between significant accumulations and not per these runs. Would like to see it shift a little further south, and of course there is plenty of time for that. I'll be in gainesville though anyway tomorrow and friday.

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its a stronger low and it brings in warm air above 5000ft. So its snow to sleet to freezing rain.

thanks franklin, it would be nice if we get a stronger storm to get heavy and more snow but I guess it doesn't work that way.  man temps in the twenties during the day and getting sleet and freezing rain.  we can't seem to get everything to line up just right but there is still time for this to lean toward more snow for the mtns. i guess

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GFS still kills the QPF in the carolinas compared to places further west.  If the GFS verifies north GA would have some issues on Friday with ice and that amount of QPF.

 

That's classic.  You hit the mountains and the storm is wrung out.  I think the GFS has the right idea in keeping precip very light east of the mountains.  I'd be surprised if it goes up any more; probably fluctuate back and forth a bit though. 

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GGEM has a little mixed bag of mess for CAE at the onset maybe.  Looked a bit dry out to the first couple frames.

 

So for CAE we have:

Sref half way on board, NAM, JMA, GGEM, Hi-Res NAM against Euro and GFS being too warm for wintry weather.  Definitely awaiting the GEFS plumes.

 

Hm.

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Someone Posted that the latest GFS showed a slower moving system, would that give it time to tap the gulf for moisture or is it not far enough south/strong enough? Also, does the system's forward speed affect the amount of moisture it can pull into it? Sorry if these are basic questions, there is so much to learn and so little time.

That, and work keeps getting in the way...

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Looks like we are going to torch for much of next week so whatever this storm brings you better enjoy it as there won't be much in the near term and it will be on to February.

If I could get about 4 inches or more of snow out of this one I would be ready for next weeks warmth until another shot or two in February.

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Actually, less QPF on 12z run than 0z (which was less than yesterday's 12z)

A lot of the models seem to be converging on a light event similiarly to the 12Z GFS today. A couple of days back, I thing the Euro had RDU getting .30 liquid. I think that's about what we'll get. ***Models always seem to lose the storm details at the three day mark**The big question now is what, and where, the type will be.

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How good is the high-resolution NAM typically at (presumably) longer hours (48+)?  I don't think I've really used that model much.

 

Hopefully this is ok to post since it is an old map. This was the hi-res snow map 12 hours before Friday's event. It certainly was correct for MBY and not too bad up north...I do think given this setup the solution today is certainly possible....but of course as we learned with the last storm you wanna see more models coming to a consensus. 

 

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Hopefully this is ok to post since it is an old map. This was the hi-res snow map 12 hours before Friday's event. It certainly was correct for MBY and not too bad up north...I do think given this setup the solution today is certainly possible....but of course as we learned with the last storm you wanna see more models coming to a consensus. 

 

Yes, It did good here also, I only had a dusting...

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