ShawnEastTN

Half dollars falling now with the sleet! Huge massive slushy flakes.

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Looks like im going to have a layer of sleet on the bottom. Sleet starting to accumulate on the ground here. Sitting at about an 80/20 sleet to snow mixture rain has stopped.

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Sleet is bizzare its like a hail storm here in summer. The pellets are big and loud.

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Pretty heavy mix for me right now. Nickle flakes, pellets and still some rain. 34 degrees.

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Just starting to see my first flakes, currently full mix rain, sleet and some flakes. 36 degrees.

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This might be one of the most rapid temp drops ive ever seen. 39.2 now


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Same, I cant remember another time falling 30 plus degrees in essentially just a couple hours.

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38 here and just starting to mix, mostly rain with some sleet pellets mixing in.

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The bottom has fallen out of the thermometer. 8 degree drop in 20 minutes. 

About the same here, fell about 10 degrees in 30 minutes. I was worried it would take time for the cold to pour over the plateau into the great valley, but not this time. Its like the gates are wide open!

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Wind is roaring suddenly, temp is beginning bto fall rapidly. Rain also starting.

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MRX with the kiss of death...just updated my forecast (Knox).  Now says 2-4 tonight with 1-2 more tomorrow!

Same for my neck of the woods which is an increase from the last pinpoint forecast.

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I’m honestly a little surprised at the winter storm watch. I expected the typical valley winter product black hole. I think that indicates they are at least considering a higher end event, even down here. 

Agree I expected the routine, WSW mountains and plateau, WWA I-40 north and if anything a special weather statement southern valley. Though I was expecting that before the 18z runs, which have really bumped up significantly this evening.

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Very awesome satellite shot of the snow streaks across the valley. I live on the edge of the streak that came out of Cumberland county across Rhea, Meigs, McMinn and Polk I ended the event with just under an inch, but 3 miles northeast nada.

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We have a half inch in Athens and still under a heavy band, Fire everyone at MRX lol!

Same here sitting at half inch in Ten Mile. Roads including main state routes between Athens and Ten Mile were white in a lot of spots on my drive just a little bit ago.

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Ground turning white for me, decent rates from my home on the Roane/Meigs line all the way to Athens.

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I think John and upper ETn will do really well if this slug of snow holds together. It laid down over 2” in an hour or so in Louisville.




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Yeah NWS Louisville upgraded part of that SPS to a bonafide Snow Squall Warning. That is really rare south of the Ohio River.

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Downsloping doing its thing in the valley. Clouds are breaking and I just saw the sun for a second.


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It doesn't last long I was in that for the last bit but starting to fill back in with clouds as the slug of moisture from middle Tennessee starts coming in now.

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Something don't see very often in these events, up stream in Louisville NWS area they are actively issuing small location polygon SPS for "Snow Squalls", this area is already under WWA.

Copy of the text for one of these:

"KYZ028-053-282145- Hardin KY-Larue KY- 351 PM EST Fri Jan 28 2022 ...A SNOW SQUALL WILL AFFECT PARTS OF HARDIN AND LARUE COUNTIES... HAZARDS...A snow squall accompanied by winds of up to 25 MPH which can rapidly reduce visibility to less than one mile. This squall is producing briefly heavy snow at the rate of 1 inch per hour. LOCATION AND MOVEMENT...At 350 PM EST, a snow squall was near Elizabethtown moving southeast at 15 MPH. THIS SQUALL WILL BE NEAR... Elizabethtown around 355 PM EST. Hodgenville around 440 PM EST. SAFETY INFO... Conditions can deteriorate rapidly in winter weather situations. Be prepared for snow or ice covered roads. Slow down and allow extra time to reach your destination. && LAT...LON 3768 8611 3780 8602 3766 8564 3754 8570 3744 8580 TIME...MOT...LOC 2050Z 302DEG 15KT 3768 8598 $$ SCHOETTMER"

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MRX Afternoon Disco:

Discussion: Strong northerly shortwave will continue to dive southeast tonight amplifying the longwave trough across our region. Lapse rates steepen this evening and early tonight as the trough axis pivots across the Tennessee Valley and Southern Appalachians. Hi-res guidance and current surface obs show a weak surface low associated with this shortwave diving southeastward from southern Indiana and western Kentucky toward the Cumberland Plateau and the Southern Appalachians this evening between 0z and 06z tonight. This weak surface low, combined with steep mid-level lapse rates, should result in most widespread scattered snow showers around 02z to 05z across the area. This is the most likely time period for some of these northwest flow snow bands along the plateau to extend into the valley with light localized accumulation possible. Even though accumulation across the valley will be localized and light, any minor accumulation may result in snow and ice covered roads as temperatures drop into the 20s. Significant snowfall is expected across the mountains. Snow has already began accumulating this afternoon across the higher terrain with this synoptic band of light precipitation associated with the mid-level front and widespread upper divergence across the Southern and Central Appalachians. As northwest flow of 20 to 35 kt and 850mb increases this evening and continues tonight, it will result in strong orographic lift parallel to the mountains. DGZ saturation continues through tonight and into Saturday morning, so this is expected to be an efficient and high impact northwest flow snow event for the mountains. High snow to liquid ratios will result in higher totals, and strong winds across the higher terrain will lead to low visibilities and blowing and drifting snow in some location. In addition, the strong winds will result in life-threatening cold wind chills across the higher elevations with values as low as -20F. The DGZ begins to dry out on Saturday morning with drier air and a clearer sky building across the area. With the arctic high pressure building across the region, temperatures will be nearly 20 degrees below normal. Winds remain strong across the higher elevations with breezy conditions across the area as northwest winds gust up to about 30 mph at times.

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Our little wave up in NW Kentucky looks a little more vigorous than I expected.


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Yeah it's definitely more juicy than most NW flow events. I noticed new WWA issued southern Indiana think it has over performed in areas where they don't have the benefit of terrain enhancement.

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Finally spitting a few flurries here in southern Morgan

That's one of the good and bad things about these events radar doesn't pick it up well. Nice little flurry here too but nothing on radar.

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Cumberland county just let kids out of school at 1:00 for incoming snow they said....At the moment just flurries , as it has been doing all morning

It makes sense, something we don't tend to think about with something as minor as an event like this, with it having been so cold previously with ground temps being right at or even below freezing even a minor amount of snow even less than an inch can make for treacherous roads where snow gets packed down onto the pavement by cars and refuses to go. Tonight and tomorrow will be even worse anything that sticks will be next to impossible to get rid of, salt doesn't work well once temps fall into the 20's let alone teens. Going to be some bad roads for sure later at least secondary roads.

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It pains me to see all these snow reports around Knoxville.

.#ValleyLife. #MotherNatureHatesKnoxville


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Yeah I understand that, but I wonder since we had that initial moisture as the leading edge of the disturbance passes that fell as virga for most, it might be helping to saturating us for the better deeper moisture to come this evening.

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Radars look pretty impressive in Illinois and Indiana rotating down this way for the evening. This might be quite a NW flow event, one strong enough to give a inch or so to valley locations. I can remember occasionally that occurring at my low valley elevation on the Tennessee River over the years.

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If it unfolds like that people may score an inch or two in a hurry. It's beginning to show some heavy streaks in places outside the eastern mountains. Especially SE and E Kentucky. It will struggle with the exact placement of the heavy streaks but it shows the potential if you get under one.

3k Nam has had similar looks off and on over the last 24 hours. Hoping for that type of setup like a frontal passage that gets enough lift to drop decent snow rates while passing. Definitely can make for a quick surprise.

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18z 3k NAM actually had what looked to me like an arctic front producing snow as it crossed TN between hour 40 and 50. 

That could be interesting. That sort of look from previous arctic fronts while moisture starved have great rates and heavy thumping for short duration, a snow squall type event. While it may only snow for an hour or so that arctic front type event can put down 2" in spots in that hour.

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