Nasty Winter Mess Late Weekend.

1:25PM 01.6.2018

Published by Darius Mack

Good Afternoon! Its been FRIGID, since we’ve started off each day this year in the single digits with subzero wind chills. All of that is about to change in the coming days. However, this weekend I’m tracking the arrival of a nasty weather system that will move through the region.

It’s something that I have kept watch for quite a while (aforementioned in my previous 7 day forecast) that Sunday and Monday look to be days that could bring a potential wintry mix. Here we are, almost 24 hours away from the forecast, and to be quite honest, I’m still having a hard time keying in on exactly who gets what and where.. But what I can tell you, is that EVERYONE has the potential of seeing all kinds of precipitation from rain to freezing rain/sleet and snow. Models have been honing in on the dicey winter set-up over much of the Ohio Valley for quite some time, this Arctic air has been holding on to us , and the question is, will it be strong enough to over-power the surge of ‘warmth’ coming from the south? Highs on Sunday could get into the mid to upper 30s and close to 40.

That’s the European forecast which generally has a good grasp on the temperature trends.


Sunday's high

ECMWF 0Z , WxBell


Here’s a look at the NAM expected highs, which you can see is running slightly cooler than the European. I think this one seems as a more likely high temp since temps by Sunday morning will start at about 10 degrees.


NAM sunday's highs

NAM 12Z, WxBell



Now lets look at the precipitation. This is the trickiest part of the forecast, because its hard to know exactly how much and what type of precipitation will be falling in some areas.

THE GFS run, which also pushes a little warmer than the NAM suggests a late mix with the transition to rain by Monday. But one thing is, temps will still hold to about 32-36 degrees, which is still a good window for any snow sleet and freezing rain. (I’ve seen wet snow fall at 35 degrees) so that’s something to keep in mind.  



GFS 00Z, WxBell


The NAM run shows a possible weak-wave moving in Sunday evening ahead of the main system. As you can see the pink indicates freezing rain and sleet and it keeps temps at bay of 32. Which is a textbook temp for any wintry precip.



NAM 12Z Simulated Radar, WxBell


So what are the key threats? I made a lovely graphic for you to see…

Winter threat index

*Freezing Rain-High

*Sleet- Moderate to High

*Wind- Moderate

*Snow- Moderate

Let’s talk about potential accumulations.

The European models shows the potential for atleast an inch of Snow by Monday afternoon. But notice how those totals are not widespread as opposed to the snow coverage north of the river.


ECMWF snowdepth Monday

ECMWF (10:1) SnowDepth, WxBell



GFS even highlights to potential for localized 1” snow accumulations.


GFS snow ouptut

GFS Total Snow, Pivotal Weather


What about the Ice threat?

NAM suggests areas across central and eastern Kentucky will have a good layer of ice with the potential accumulated snow.

NAM ice forecast 

Here’s a more fine-tuned map that outlines the areas with the greatest potential for ice and snow.

Weekend Messy set-up


I’ll keep you posted! 🙂 


Late Tracking

1:05a 02/16

I’m watching the radar and it looks that most of the area is now getting some full blown snow.


With that being said, I have changed my snow thoughts on this, this is my final snowcast for this event.

snow thoughts

How are the roads in Scott County?

I75 NB @ MP 127

Scott County I-75 NB


I-75 @ Newtown Pike

I-75 Newtown Pike

How are the roads across the region?

I-64 WB @ MP 97

Clark I-64 West Bound

I-75 @ Man O War Blvd

I-75 Man O’ War




You can check the latest road conditions at 511.ky.gov

School Watch Meter still stands at a 6/11..

School Watch Meter Tuesday


I’m off to bed, you should be in bed too 😉

Changing Weather, and the School Watch Meter

6:36P 02/15

How about that? A snow storm on your valentine’s day Sunday, rain today, and then wait… Yes, I’m talking yet more snow for parts of the bluegrass, now what does that exactly mean? I understand temps hit above the freezing mark, but road temps are taking time to match that. Here is the current pavement temp summary across the state… Notice some spots, especially in northern and central Kentucky, the road temps are either at or near the freezing mark.

pavement temp summary

KYTC Pavement Temperature Summary


I think that the temps we are seeing now, are as high as we are going to get, tonight cooler air swings in, and with any precipitation, we’ll likely see the switch over from rain to snow. One particular model (HRRR) updates every hour, showing that the rain holds steady for just a short while.. It looks likely that a band of heavy snow develops across central and eastern Kentucky






Speaking of which, look at the snow output this model is showing Tuesday morning. Now I’m not quick to judge, however 8 inches I think is a bit extreme…

HRRR snow totoals

HRRR Snowfall, WxBell


But.. the Euro, is not soo bullish. Showing 1”-4” range by Tuesday morning.

Euro snow totals

ECMWF Total Snowfall, WxBell


Hi Res NAM  shifts the area of heavier amounts more towards the east..

HiRes Nam snow cast

Hi-Res NAM Snow Totals, WxBell



With that being said, here is what I’m thinking soo far in terms of snow totals…

Snow Thoughts Tuesday.jpg

A Winter Weather Advisory is in place for the area through 7 am tomorrow.

Winter Weather Advisory


I’m giving a 6 out of 11 on the School Watch meter, which gives Scott county students a MODERATE- HIGH chance for a Snowday tomorrow, and here is why.

School Watch Meter Tuesday.jpg

          Though its forecasted for a heavy band of snow, I believe there is Bust potential, meaning that we may not get as much snow as the models are predicting, this is a fairly critical factor .

          Even if we don’t get as much snow as forecasted, roads will still deteoriate, the rain and left over snow will create a slush, making travel treacherous by tomorrow morning. Any snow added to that will make conditions worse

      This will happen overnight and during the early morning hour tomorrow.

Check back with me later tonight to see if the School Watch meter goes up or down.

Winter Weather Tracker Update. #KYWX

Posted at 4:25 AM January 26,2015 by Darius Mack

Good early morning gang, we’re watching for the possibility of slick travel this morning as snow moves across parts of the region this morning. Here is a current look at the Radar from Intellicast. What you’re seeing is the low-level wrap around moisture as the LOW tracks east.


This isn’t a widespread snow, but lets check and see how those temps are this morning. Any temps at or below freezing is something to be concerned about, several areas could see some ICY spots on the roads this morning.

temps right now

Now lets track those road conditions.

I-75 @ Man o’ War

I-75 Man o War

Scott I-75 SB 127 MM

I75 SB 127MM

I-75@1-71 Southern Split

I-75@1-71 Southern Split

  I-275 @1-471

I-275 @1-471   

I-64 @ East 22nd Street Louisville

64 E at 22ND street Louisvile

Since road conditions look to have deteriorated and temp are subfreezing, The School Watch Mete is under a LOW-MODERATE chance for a closing, there is an increased risk however of a school delay.

School Watch Meter Monday

Will Winter Deliver the package this Weekend? #kywx

10:30 PM November 11,2014
It’s Late this Tuesday evening, but no worries I have your update on that snow potential I talked to you about  a few days ago. The snow chances have now been pushed back to Sunday. But first, lets track some of that stuff that’s on the radar. Gusty lines of showers are pushing in SW to NE this hour, these showers are gusting generally around 30-40mph, this will exit throughout the first half of your Wednesday, but those temps are on the decline and that is the case for the rest of the week. Make sure you bundle up! bwg_None_anim (1)

FAST FORWARD… BOOM KAZAM! It’s action packed, no telling how many snow day questions I’ve been getting concerning this snow event expected Sunday evening. Let me get things straight, I know the weather more than I know our superintendent, will she be generous on those snow days this year? I don’t know. If my confidence level improves I might share my thoughts on that on Friday. Right now I just want to talk about snow potential,
SATURDAY, I’m watching a mid-wave disturbance that set’s up across the Kansas/Missouri valley, and a southern flow will aid in the moisture bank, just how much are we talking? Here is a look at those GFS runs. The Blue line represents the freezing line, notice how it stays below Kentucky. A series of snow showers will likely filter through Sunday night- Monday morning is the timing that I’m closely watching. GFS spits out a general 1-2 inches for our region and locally higher amounts can be expected by Monday afternoon.
My confidence on this however is still a 50/50, if this holds it should boost up by Friday!

GFS models sunday       GFS accumulation model monday
Stay safe!

(Forecaster Darius Mack)