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Everything posted by John1122
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Jan 30th-February 1st 2026 Arctic Blast/ULL Snow OBS Thread.
John1122 replied to John1122's topic in Tennessee Valley
Anyone in the mid-state seeing anything from that band? -
Gonna see who wins the war, all models (except maybe the NBM) or my point forecast. (my high today has been 29) This Afternoon A 40 percent chance of snow showers. Cloudy, with a high near 34. North wind around 5 mph. Tonight Snow showers, mainly before 3am. Low around 11. Wind chill values between 1 and 6. North wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
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The 3k has a 6 inch dot close to me now.
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It took me from 1 inch to 4 inches.
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The 18z HRRR snowfall output looks almost exactly like the Euro but with a little less in the southern valley around downtown Chattanooga.
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Jan 30th-February 1st 2026 Arctic Blast/ULL Snow OBS Thread.
John1122 replied to John1122's topic in Tennessee Valley
Finally getting that foggy look, the flakes are small, the temp has dropped a degree and snow is beginning to cover up raised surfaces where the snow had melted off. -
This is a pre-event portion. Most accumulations are supposed to be tonight. My forecast for tonight is 80 percent snow, low 12, accumulation 1/2 inch. It's MRX vs the Euro and all other modeling except the NAM now.
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Yes.
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Jan 30th-February 1st 2026 Arctic Blast/ULL Snow OBS Thread.
John1122 replied to John1122's topic in Tennessee Valley
The clouds are thick here and the temp is 29 but the snow is very light so far. -
MRX updated and lowered my snow totals to 1/2 inch.
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12z Euro.
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Jan 30th-February 1st 2026 Arctic Blast/ULL Snow OBS Thread.
John1122 replied to John1122's topic in Tennessee Valley
Snow beginning, 29 degrees. Already have snow on the ground mostly, so everything will stick. We seem to get this and then I get a lull per my forecast. -
Euro at 12z Maintains 3 at the center of the Plateau, rising as you head east. 6+ knox east. 1.5-2 in Hamilton Co.
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AI GFS ticked west slightly with it's precip shield. In line with most of the non-NAM modeling.
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Mostly cloudy and 28 here.
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Canadian is basically 4+ Plateau, 2.5 Chatty, 5+ everywhere else.
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The RAP is running and closer to it's wheelhouse, 2 inches in Crossville, 3 over Holston, 4-5 my area, 5-7 down to Knox, 6-8 and still snowing eastern areas. Most of Hamilton around 1 inch but 9/10ths over downtown Chattanooga.
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Wrong thread.
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I hope to do better than 1 inch but this being the one time the NAM is correct wouldn't shock me. Earlier this winter one of the events it kept insisting I was getting 3-4 inches until the bitter end but I got about an inch. The Euro/RGEM gave me about an inch from that one. Here we have the opposite totals but the same models disagreeing.
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For reasons beyond me, the GFS/NAM have a major snow shadow over Southern Campbell County that suggest a downsloping effect off Cross Mountain, but I don't think the precip with this one is moving SW to NE like a typical system, but that's the direction of the drying it's trying to show. They often try that with traditional sliders where the precip is moving up from Alabama.
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They have me with 1 inch, which is closest to the NAM still. The Euro/RGEM/HRRR/ICON/GFS have 4+ for me.
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MRX has apparently pushed all in on the NAM judging by their snow maps. (I'm sure it's the NBM, but it weighs the NAM family heavily the closer we get)
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Currently the model battle looks like the NAMs vs everyone else. The NAMs have dried up considerably. Everyone else maintains so far.
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The use of so many bad models but not the Euro Op is crazy. Especially since they use the GFS op. I'm not sure that there is actual human involvement in it though. I think it simply blends the models noted on the dashboard and spits out outdated material.
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