LOUISVILLE, Ky. — First off, let's tackle the main weather impacts this weekend!  

1) FLASH FREEZING:  So, what is that?  This happens when temperatures tumble rapidly, and the water on the roadways quickly freezes.  Temperatures will drop sharply to the low 20s tonight and we'll have to watch out for a thin layer of ice on the roads. 

2) FlOODING: 1-2" of rainfall is likely today.  The ground will be cold and saturated, so lots of run-off will be likely.  Watch out for rising rivers, creeks, and streams, and high water around flood-prone areas. 

3) SNOW ACCUMULATIONS: A period of snow is likely during the overnight and ending by 5 AM Sunday. This snow could be on top of the already icy (flash freezing we mentioned) conditions and could keep roads very slick through Sunday morning.  Snow totals of 4-6" are possible in areas under the Winter Storm Warning, including Louisville and Indiana counties in the viewing area. A Winter Weather Advisory covers area counties in Kentucky south of Louisville, with 1-3" of snow possible.

4) DANGEROUS COLD: Temperatures will fall to the teens and 20s on Sunday, with wind gusts up to 20-30 mph. This will create severe wind chills in the single digits, or at times below zero. Limit your time outdoors on Sunday, and if you have to be outside, make sure you are covering up as much skin as possible with warm layers.  

FUTURECAST TIMELINE:  The maps below show the precipitation type, and the upper-right corner show the day and time.  Green, yellow, orange = rain.  Pink = mixed precipitation / ice.  Blue/white = snow.  Follow along with the maps below. 

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SNOWFALL ACCUMULATIONS: Snowfall totals vary at this time based on the different weather models analyze. The GFS model shows snow totals of 4-6" possible in the Winter Storm Warning area. 1-3" inches of snow is possible in southern counties.

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WINTRY WEATHER THREATS
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We finish the weekend with the brutal cold!  See the wind chills below.  Similar wind chills will continue into our Martin Luther King Jr. holiday morning.

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Here's a detailed weather discussion...

We are tracking a system that will bring a mix of rain, freezing rain, ice and snow to Kentuckiana this weekend. 

As this low pressure system and associated frontal boundaries track towards Kentuckiana, we'll be watching the impact of various types of precipitation. We will see heavy rain on Saturday across much of the area with a 1-2" rainfall expected.

Once we hit the mid to late evening hours, temperatures will crash as the colder air moves in and it is possible we could see a "flash freeze" with temperatures dropping some 20 to 25 degrees over a 2 hour period! One piece of advice...if your car is outside on Saturday evening, put your windshield wipers up otherwise they will likely freeze to the windshield as the colder air arrives.

For Sunday, expect a windy and very cold day. Highs will only recover into the mid-20s and with a brisk northwest wind, it will feel much colder than that. Wind chills will be in the single digits and even below zero at times Sunday afternoon. Lows may drop in the single digits in a few spots early on the Martin Luther King Jr. holiday with most locations into the low and mid-teens. Luckily the bitter cold won't hang around long as another storm system will move in by Tuesday.

Stay with the WHAS11 First Alert StormTeam for the latest on this storm system as we head toward the weekend!

Another rain/snow mix will return late Tuesday into Wednesday ... stay tuned!