John1122
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December 2020 Medium/Long Term Pattern Discussion.
John1122 replied to John1122's topic in Tennessee Valley
The Euro cooks up something for Christmas eve as well. It's not the epic bomb that was the Canadian but it throws out some biting cold and anafrontal snow due to the strength and speed of the Arctic air mass. There's hardly even any rain, most of the precip except for the very leading edge is frozen. The Euro ends up here and it may be higher with ratios. Many of us would have a shimmering blanket on Christmas morning. Not much of any melting either as temps go from single digits and teens into the low to mid 20s to lower 30s. -
Changed over to light snow at the house. As I drove to town it was mixed below about 1500 feet.
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December 2020 Medium/Long Term Pattern Discussion.
John1122 replied to John1122's topic in Tennessee Valley
I suspect we will at least see snow showers and snow flurries on Christmas. It's a straight up Arctic airmass and it will wring out moisture. I'm also convinced it will snow/rain/be cloudy in general on the 21st too. Ever since the perfect eclipse weather I've been cloudy or precip has been falling for every celestial event. I had a seemingly endless evening cloud streak trying to see Neowise. -
Hit 31 then started rising. Up to 36 right now.
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December 2020 Medium/Long Term Pattern Discussion.
John1122 replied to John1122's topic in Tennessee Valley
I'm approaching 100 inches this year but probably won't quite get there although the GFS has me pretty close with some of it's big totals showing up. Though technically I'm partly in the Cumberland river basin. -
December 2020 Medium/Long Term Pattern Discussion.
John1122 replied to John1122's topic in Tennessee Valley
The Christmas time frame has shown up on the GFS a few times too. Looked like anafrontal snow showers. Oddly those have produced two years in a row for me now when not much else has. -
Looks like a decent amount of snow above 2800 feet or so. The entire top several hundred feet of Cross mountain is nicely white.
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December 2020 Medium/Long Term Pattern Discussion.
John1122 replied to John1122's topic in Tennessee Valley
I saw someone mention that there was another mountain torque event about to happen in east Asia and that the first is what led to the +PNA after Thanksgiving into early December that brought snow and cold to the area. Hopefully that comes to pass. If we can get the PNA to cooperate in late December vs late November those snow chances should become much more widespread and less elevation dependent. Some modeling also that the TPV gets shunted down towards East central Canada and delivers Siberian cold just up stream. Once you start seeing those -20s and -30s heading for the border you have some better source air nearby. We pulled off snow in parts of the area in late November and those areas were in the upper 20s above zero. -
It would he hard to complain about the start of winter imby. The first two weeks I've gotten 3 inches of snow. Two other days have seen snow falling and there's ice/snow in my forecast in the next 48 hours. The question becomes is this a one off like the last couple of years where winter peaked in December then went away, or is it a 95-96/09-10/10-11 where winter started early in December and just kept coming back until mid February? I'll say for here, the December events of the last two years were basically one offs that led into abrupt pattern shifts to unrelenting warmth. This has been multiple wintry events and the pattern looks very favorable again in another week or so after this.
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Had a switch over this morning that didn't amount to anything on the ground really. Not checked above 3000 feet. There was no accumulation at 2500 though it could have melted off.
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37 degrees and just blitzing rain. Looks like there's been some embedded snow in areas out to the west but not super wide spread. There's a small area near Montacello Kentucky where some blue is showing up. Byrdstown just Southwest of Montacello in Tn is down to 34 but ptype says heavy rain there still currently.
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42 degrees and the rain is actually starting to fall steadily. If I change over I expect it to be after 5am.
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December 2020 Medium/Long Term Pattern Discussion.
John1122 replied to John1122's topic in Tennessee Valley
It may be wrong but the Euro has been locked in here for a good number of runs in a row. -
December 2020 Medium/Long Term Pattern Discussion.
John1122 replied to John1122's topic in Tennessee Valley
The Euro isn't as aggressive as the short range hi res models for western areas but it was better than 12z for middle Valley and Plateau/SEKy areas. -
December 2020 Medium/Long Term Pattern Discussion.
John1122 replied to John1122's topic in Tennessee Valley
Pulling for you and Kevin, as well as our mid valley guys. -
December 2020 Medium/Long Term Pattern Discussion.
John1122 replied to John1122's topic in Tennessee Valley
As we get closer in the snow shield has expanded across Arkansas and now across West Tennessee on the hi-res models. Hopefully it expands state wide. If so it will look like the good Euro run from about 5 days ago. -
December 2020 Medium/Long Term Pattern Discussion.
John1122 replied to John1122's topic in Tennessee Valley
Sunday night into Monday. -
Fall/Winter Banter - Football, Basketball, Snowball?
John1122 replied to John1122's topic in Tennessee Valley
I have a friend who lives at the base of the mountain there and he literally gets about half the precip I do a year. -
December 2020 Medium/Long Term Pattern Discussion.
John1122 replied to John1122's topic in Tennessee Valley
12k NAM isn't far off from the 3k, it just doesn't handle the dynamic precip areas as finely as the 3k. Will have to see if they are just NAMing but it's been a big shift towards winter weather over the last two days. -
December 2020 Medium/Long Term Pattern Discussion.
John1122 replied to John1122's topic in Tennessee Valley
Ends up here. Would be a true paste job on trees and powerlines. Comes at a good time of day. -
December 2020 Medium/Long Term Pattern Discussion.
John1122 replied to John1122's topic in Tennessee Valley
That purple in the deep blue is some 40dbz+ snow. -
December 2020 Medium/Long Term Pattern Discussion.
John1122 replied to John1122's topic in Tennessee Valley
3k NAM is rolling in hot for the west and mid Valley. -
December 2020 Medium/Long Term Pattern Discussion.
John1122 replied to John1122's topic in Tennessee Valley
I'm skeptical too. I guess it's rate driven and that's allowing it to get below 3000 feet and stay snow on the Euro. -
December 2020 Medium/Long Term Pattern Discussion.
John1122 replied to John1122's topic in Tennessee Valley
Its dumping right on my head right there. It's insistent on that happening for multiple runs in a row. -
December 2020 Medium/Long Term Pattern Discussion.
John1122 replied to John1122's topic in Tennessee Valley
Euro was similar to the GFS/NAM and it's 12z run with snow over the Plateau/SEKY and even a bit of unelevated Middle Tennessee. Also shows wave two beginning as frozen at times across the area before changing to rain.
