Absolute Vorticity

tpweather wrote: ↑Fri Jan 10, 2025 8:31 am Atmosphere is moistening up quite nicely so anytime after 11am flakes will begin to fly and get heavier as the afternoon wears on. My guess heaviest period between say 4-7 so not a nice rush hour by any means

Not at all. Rush hour will certainly be impacted this afternoon. That is when the storm will be at its peak for us as you mentioned. Nice post Tim!

0.21" from the 12Z NAM at CVG for QPF.

XU did not call remote. Knowing them they'll wait until there's 2" and traffic issues to say "Go home!". Thankfully my boss is sane and told everyone to go home at noon. I'm already home waiting out a fever for my kiddo.

Good thing is he only missed one day of school

Radar shows snow moving into the area now, but it is virga. Evansville now has moderate snow. Light snow in Huntingburg, IN. Still reporting light snow Owensville, KY and points SW. LOU is still cloudy as is Bloomington, IN.

MJSun wrote: ↑Fri Jan 10, 2025 9:16 am XU did not call remote. Knowing them they'll wait until there's 2" and traffic issues to say "Go home!". Thankfully my boss is sane and told everyone to go home at noon. I'm already home waiting out a fever for my kiddo.

Good thing is he only missed one day of school

Hey, Mollie. Thankfully, My team lead at UC allowed us to work remote today! Glad you are home safe.

My Aunt in St Charles MO currently reporting light snow with 2 new inches on the ground so far.

Decent frontogenic forcing just to our SW. That is always nice to see with regards to banding.


LOU looks to be getting underway now. I am looking at a Downtown Web Cam and it has that nice hazy look to it.

Snowing in Corydon, IN also per web cams.

BG will have his SnowTalk! video around 12:30pm today he announced on X (Twitter).

12Z RGEM has 0.15 to 0.30" of QPF for the region depending on where you're at. Again... watch the mesoscale banding later this afternoon and evening.

Seeing some flakes flying now on a traffic cam at I-71 in Carroll County, KY. Mile Marker 44. Est flakes are 40-50 miles away.

2-4” locally 5” looks on track for most. We do have an area of potential lower totals across the far SE but that’s not a guarantee.

Snow intensity picking up NE of LOU now. Love being able to see these traffic cams.

Everything still looks good and a general 2-4 inches and the lowest would most likely be north and northeast of I-70. Can someone get more than 4 and of course that is possible with a heavier band and though yesterday the models tended to show this southwest of here I believe that has moved somewhat further east but still trying to get exact placement.

I agree. Just watching things and waiting more then anything here lol Bedford, IN reporting light snow. Mod snow at Paducah and Owensboro. Light snow at LOU and Ft Knox.

Per SPC mesopage from the Metro on back SW, we are saturated at 700 MB now so we're getting there. Nice 700 MB frontogenic forcing over us right now too. Just waiting on the column to saturate to get the event started! 12Z ILN sounding from around 9am clearly shows a large pocket of dry air between 700-1000 MB so that's the issue as to why the radar says it should be snowing right now but it isn't.

0.21" QPF at CVG from the 12Z GooFuS.

Snowing in Louisville

SDF Louisville indicates snow started 45 minutes ago. 14z HRRR says 3.6" now. 0.28" QPF

The boys have updated:

.NEAR TERM /UNTIL 6 PM THIS EVENING/...
Snow has just started to work into western portions of the
region and will continue to overspread the area through the
day. Still expecting 2 to 4 inches across the region for the
event. Still cannot rule out an isolated 4 inch amount, however
most locations will stay below 4 inches. Continued the winter
weather advisory. Temperatures will not rise much today with
highs only in the 20s expected.

That band in Southern Illinois means business. Hopefully that can ride up along and just north of the river.

I-71 corridor and SE might be in the lower snow zone per current radar orientation. That may change however as the storm continues to move in and evolve. It may also be looking like that too since we are still trying to saturate.

ILN is saying around 3 o'clock for the onset of snow re both the MV and Tri-state.

More like right now or earlier starting in quite a few places already.

My concern like in the last system was the further northeast you live the chances of less snow is possible. Just the amount of time its snowing is what it comes down too and say you get 7 or 8 hours compared to 5 or 6 makes a little difference. The snow is moving southwest to northeast but at the same time the entire system is moving east. I would say by 2pm we have a better ideal where those bands may set up for a period and those you could see 1 inch an hour for a few hours which helps with higher totals. Still 2-4 a safe call and main reason ratios are higher than normal around here

tron777 wrote: ↑Fri Jan 10, 2025 11:48 am I-71 corridor and SE might be in the lower snow zone per current radar orientation. That may change however as the storm continues to move in and evolve. It may also be looking like that too since we are still trying to saturate.

I think that’s been the trend for the last 36 hrs. and why I went 1-3” for areas near and south 71