CHICAGO (STMW) — Snow, frigid temperatures and 45-mph winds could make for a grisly Thursday morning in parts of northwest Indiana, the National Weather Service warned.

It was snowing lightly in parts of Porter County–including Valparaiso–at 4:30 a.m., the weather service said.

READ MORE: Jussie Smollett Takes The Witness Stand, Describes Alleged Attack As Real And Like 'Something Out Of Looney Tunes Adventures'

A winter weather advisory, in effect from 4 a.m. to 6 p.m. Thursday, warns that up to six inches could be on the ground by the afternoon, but mainly by the lake in the northeastern part of the county.

“Therefore … not everywhere in Porter County will see significant accumulations,” the advisory said.

READ MORE: Chicago Weather: Coldest Temperatures In Nearly 10 Months Early Tuesday

The flakes mixed with potential wind gusts of up to 45 mph along the lakefront could significantly reduce visibility, the advisory warned.

Temperatures were expected to stick around 14 degrees during the day and drop to 7 degrees at night, paired with wind chills between minus 4 and minus 9, the weather service said.

MORE NEWS: View Live Radar

(Source: Sun-Times Media Wire © Chicago Sun-Times 2015. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)