
John1122
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Everything posted by John1122
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Oak Moon Upslope/ Upper Low Storm Obs
John1122 replied to Holston_River_Rambler's topic in Tennessee Valley
I hope you can pull off some decent rates today if nothing else. I've seen NNW flow here fire up bands that stretch all the way into Northern Knox. The next batch of precip appears to be moving almost due East. If it doesn't dry up coming off the Plateau Roane through Knox will likely see snow from it.- 300 replies
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- upslope snow
- upper level disturbance
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Oak Moon Upslope/ Upper Low Storm Obs
John1122 replied to Holston_River_Rambler's topic in Tennessee Valley
Looks like I'm an hour or two from the band in Kentucky getting here. Appears to generally be all snow.- 300 replies
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- upslope snow
- upper level disturbance
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Oak Moon Upslope/ Upper Low Storm Obs
John1122 replied to Holston_River_Rambler's topic in Tennessee Valley
MRX bumped my chance and totals back up again. Today Rain showers or snow showers in the morning, then snow showers or rain showers likely in the afternoon. Snow accumulation up to 1 inch possible, especially over the higher elevations. Highs in the upper 30s to lower 40s. West winds 10 to 15 mph. Chance of precipitation 80 percent. Tonight Cloudy. Snow showers likely until early morning, then a chance of snow showers late. Snow accumulation up to 2 inches. total snow accumulation of 1 to 3 inches possible, especially over the higher elevations. Lows in the mid to upper 20s. West winds 5 to 15 mph. Chance of snow 70 percent.- 300 replies
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Oak Moon Upslope/ Upper Low Storm Obs
John1122 replied to Holston_River_Rambler's topic in Tennessee Valley
My data on 850s was from 8am. It appears that as of 9am the 850 freezing line had cleared the entire state besides Bristol eastward. I wouldn't wager your temps will do anything but fall the rest of the day.- 300 replies
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Oak Moon Upslope/ Upper Low Storm Obs
John1122 replied to Holston_River_Rambler's topic in Tennessee Valley
It is about on schedule. It was a slow process. I started dropping about 2.5 hours after Shocker. The 850 line runs from about Cumberland Gap to Murphy NC right now. It's probably past you and only clipping East Knox. I wouldn't be surprised if the rest of the precip today, even in the valley, is snow when its heavy, drizzle otherwise.- 300 replies
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Oak Moon Upslope/ Upper Low Storm Obs
John1122 replied to Holston_River_Rambler's topic in Tennessee Valley
34 with a brief snow shower before getting dry slotted.- 300 replies
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Oak Moon Upslope/ Upper Low Storm Obs
John1122 replied to Holston_River_Rambler's topic in Tennessee Valley
Short range models and hi-res models really nailed that changeover from Bowling Green down into Middle Tennessee.- 300 replies
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Oak Moon Upslope/ Upper Low Storm Obs
John1122 replied to Holston_River_Rambler's topic in Tennessee Valley
- 300 replies
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Oak Moon Upslope/ Upper Low Storm Obs
John1122 replied to Holston_River_Rambler's topic in Tennessee Valley
It's 41 in Cookeville, 43 in Nashville and 39 in Clarksville. You're getting close to being on the West side of the low. The front appears to be from Clarksville to Jackson.- 300 replies
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Oak Moon Upslope/ Upper Low Storm Obs
John1122 replied to Holston_River_Rambler's topic in Tennessee Valley
That area has been consistently high across modeling. I think you should be looking at 2 or 3 inches at least.- 300 replies
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Oak Moon Upslope/ Upper Low Storm Obs
John1122 replied to Holston_River_Rambler's topic in Tennessee Valley
The southeast areas are upslope, the areas west of there appear to be heavy synoptic snow that is part of the same band than gets Middle Tennessee and there's a gap between the two where the synoptic band misses and the upslope doesn't happen.- 300 replies
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- upslope snow
- upper level disturbance
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Oak Moon Upslope/ Upper Low Storm Obs
John1122 replied to Holston_River_Rambler's topic in Tennessee Valley
- 300 replies
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- upslope snow
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Oak Moon Upslope/ Upper Low Storm Obs
John1122 replied to Holston_River_Rambler's topic in Tennessee Valley
The 39hr 03z RAP was pretty decent from the Plateau west especially. I don't have a way to see it up close at the county view level but it looked like a lot of Middle Tennessee was in the 1-2 inch area.- 300 replies
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- upslope snow
- upper level disturbance
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Oak Moon Upslope/ Upper Low Storm Obs
John1122 replied to Holston_River_Rambler's topic in Tennessee Valley
LeConte forecast. Monday Rain and snow, becoming all snow after 8am. Temperature falling to around 23 by 5pm. Breezy, with a west wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 7 inches possible. Monday Night Snow. Low around 13. Wind chill values between -2 and 8. Blustery, with a northwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 90%. New snow accumulation of 6 to 10 inches possible. Tuesday A 40 percent chance of snow, mainly before 10am. Mostly cloudy and cold, with a high near 19. Wind chill values between -4 and 3. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph. 2900 ft near Gatlinburg, hope this turns out right for our cabin folk. Monday Rain before 10am, then rain and snow between 10am and 4pm, then snow likely after 4pm. Temperature falling to around 31 by 5pm. West wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New snow accumulation of around an inch possible. Monday Night Snow. Low around 20. West wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New snow accumulation of 3 to 5 inches possible. Tuesday A 40 percent chance of snow, mainly before 10am. Cloudy, then gradually becoming mostly sunny, with a high near 26. West wind 10 to 15 mph.- 300 replies
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Oak Moon Upslope/ Upper Low Storm Obs
John1122 replied to Holston_River_Rambler's topic in Tennessee Valley
I am surprised they issued the WWA, though they point out it's mainly above 2000 feet. I'm not 100 percent sure the point forecast isn't generated by the NAM forecast. It shows the change over happening here at 8 am, and my point forecast says "Rain before 8am, then snow between 8 and 9am, then rain until 2PM, then snow after 2PM."- 300 replies
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Oak Moon Upslope/ Upper Low Storm Obs
John1122 replied to Holston_River_Rambler's topic in Tennessee Valley
MRX significantly reduced the chance of snow here. It went from 70 percent down to 50 percent Monday night. Mentions dry air above 700mb being a problem for most areas that aren't an Eastern Mountain area. For their mountain areas they say 1-2 inches from 2000-3500 and much more above 3500.- 300 replies
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- upslope snow
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Oak Moon Upslope/ Upper Low Storm Obs
John1122 replied to Holston_River_Rambler's topic in Tennessee Valley
All the models love the Eastern Rim/Western Edge of the Plateau. I expect OHX to issue a snow advisory for their Plateau counties. I believe we have a poster who lives in NW Cumberland. They may be the winners here outside the Smokies/Eastern upslope areas.- 300 replies
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Oak Moon Upslope/ Upper Low Storm Obs
John1122 replied to Holston_River_Rambler's topic in Tennessee Valley
MRX has me with 70 percent snow Monday night and a low of 24. So hopefully it can get sub freezing fast. Got a little colder than forecast last night, down to 31 vs 34 that was predicted. Not a huge thing but every hour the ground gets freezing air over it it helps a little.- 300 replies
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December 2020 Medium/Long Term Pattern Discussion.
John1122 replied to John1122's topic in Tennessee Valley
Everything is pretty consistent across modeling with this one now. I'd say the MRX map looks pretty good. Less than an inch below 3000 and 6+ at LeConte. For my area I'm going to go with 1/2-3/4ths inch on decks and car tops and a dusting on grassy areas as far as the ground goes depending on time of day. -
December 2020 Medium/Long Term Pattern Discussion.
John1122 replied to John1122's topic in Tennessee Valley
The 12z Euro Control dropped the hammer with that wave. -
December 2020 Medium/Long Term Pattern Discussion.
John1122 replied to John1122's topic in Tennessee Valley
00z hi-res, the 3K NAM and RGEM looked better for more of us than the 12K NAM. The 3k is down right aggressive in some areas even outside of elevation. I assume it's trying to guess as mesoscale bands that drop heavier stuff. -
December 2020 Medium/Long Term Pattern Discussion.
John1122 replied to John1122's topic in Tennessee Valley
Elevation makes massive differences across the area. 2800 should see accumulation for sure. Even 2 or 3 hundred feet is night and day at times though. 3000 is a magic number there it seems because MRX uses it frequently. I know that above 3000 in my area sees a significant amount more than 2500. There are also places that are much better for upslope than others and those even vary based on the angle of the wind. Hopefully your cabin is located in a favorable spot. -
December 2020 Medium/Long Term Pattern Discussion.
John1122 replied to John1122's topic in Tennessee Valley
UKMet temperatures during that band Holston posted. It's easy to spot the Plateau/Mountains on it. Being 32 or below would aid immensely for any of us hoping for accumulating snow in this kind of warm ground set up. -
December 2020 Medium/Long Term Pattern Discussion.
John1122 replied to John1122's topic in Tennessee Valley
I got under one of those one night and got 6 inches of snow in 3 hours with a temp in the lower 20s. -
December 2020 Medium/Long Term Pattern Discussion.
John1122 replied to John1122's topic in Tennessee Valley
Middle Tennessee has looked better than most areas of the state that aren't mountainous throughout. You don't have to deal with any downsloping really like the eastern valley areas.