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Winter Weather Threat 1/4/-1/6/2025

GeneralChow

GeneralChow

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Sustaining Member
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St. Louis, MO, Nashville, TN, & Cooper City, FL
I relocated from KC to the Lemay area in southern St. Louis MO. This will likely be a dangerous storm between Saturday and Monday for people in Missouri on both side of I70, as well as those further east along I64 from IL to KY. Models may have backed off on precipitation, but we can clearly see a moist airmass slamming into an area of cool dry air. The ridge that retreats to the mid-Mississippi Valley gets choked between the Nova Scotia Low and the developing trough digging into OKC. The Clipper that passes over the IOWA and Northern Missouri Thursday Night ensures that LL cold air will be entrenched over areas North of I70. The main question is whether St. Louis and KC will see 1-2" of precipitation fall as Ice, Snow or a Mixture? Cold Air will be available in the lower and upper levels, so heavy precipitation rates could be heavy enough to overcome some of the Mid-Level Warmth, but I think people need to be prepared for a Catastrophic Ice Storm. Also, possible that areas see an earlier start with big frontogenesis snowfall between the area of cold surface winds from NE and SW Mid-Level Winds coming around the Trough. Pretty unstable air off the gulf could bring colder temperatures down ahead of a confluence zone, and this evidenced by the Day 5 Outlook from SPC.
 
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A very impactful winter storm is set to sweep from the Central Plains to the mid-Atlantic over the weekend into Monday. An intense and lengthy swath of snow appears probable with amounts of a foot or more. There will also be areas of significant ice. Temperatures are expected to plummet and remain brutally cold.
 
We had a snow squall warning earlier, which I've never seen before. Nothing stuck thankfully but still gross.
 
I feel like this system next weekend will have some big winners and losers...which is typical for Alabama snow events. You can already see a dry slot setting up as temps crash, also can see trowel with warmer temps aloft, especially west and central sections. Right now my target area is east of I65 and north of I20...but still lots of watching and changes.
 
Wow, Louisville, KY getting whopped by this one. 4-8 inches in the city and up to a foot just north in southern IN now expected.
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Louisville roads deteriorating fast. Photo credit: Ohio Storm Chasers

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Ha! Good stuff.

 
We are in Central Virginia near the SE Appalachian Mts but below the mountains. We have gotten at least 2-3 inches on snow since it started for us around 3:50 PM EST today. My IPhone weather app says to expect another 10-12’’ of snow in the next 24 hours. I thought this was an up north thing to get a foot of snow or more.
 
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