750
FXUS63 KIWX 110552
AFDIWX

Area Forecast Discussion
National Weather Service Northern Indiana
1252 AM EST Thu Dec 11 2025

.KEY MESSAGES...

- Light lake effect snow showers tonight, with lows 17-24
  degrees.

- 1-2" of light snow possible Thursday night, mainly south of
  US-30.

- More light snow is expected this weekend, along with very cold
  air. Wind chill values may drop below -10F Sunday morning.

&&

.DISCUSSION...
Issued at 129 PM EST Wed Dec 10 2025

A trailing cold front, currently near the US 24 corridor as of 18z,
will continue southeast clearing the rest of our forecast area by
early this evening. Associated convergence under weakened
deformation will allow for light precipitation (rain changing to
light snow) to accompany this feature with little to no snow
accumulation.

Attention then turns to marginally favorable conditions for LES late
this afternoon into tonight as 850 mb delta T`s push 20 in colder
northwest flow. The overall moisture quality and meager 5-6 kft
inversion heights doesn`t really favor a sustained vigorous lake
response, though the cloud layer does reach into the DGZ for
localized 1-2" snows and minor travel impacts in favored nnw flow
snow belts.

Cold northwest flow will send a couple more clippers southeast
through the Midwest and Ohio Valley late this week into the weekend.
These appear to be your more classic clippers that have relatively
narrow snow swaths (2-5"). A model consensus favors the Thursday
night wave and heavier fgen snow to bypass just southwest of the
area, though still possibly clipping areas mainly southwest of US 30
with a quick 1-2" of snow. Still some wriggle room left for a slight
north or south tick. Another clipper then follows through Saturday
afternoon-night with additional snow chances, followed by LES and
sub-zero wind chills Sunday into Sunday night. This cold/wintry
pattern then finally breaks down next week.

&&

.AVIATION /06Z TAFS THROUGH 06Z FRIDAY/...
Issued at 1246 AM EST Thu Dec 11 2025

VFR to MVFR conditions are expected at the terminals tonight
into Thursday evening. Outside of a few flurries expect dry
conditions with ceilings hovering between 2500-3500 ft for a
majority of the time. Ceilings of around 2000ft are possible at
KSBN between 15-18z, so have a tempo for that. Otherwise,
ceilings lifting to around 4K or greater with NW winds shifting
west-southwest through the day, becoming light and variable
overnight. Light snow with MVFR ceilings could impact KSBN
towards the 3-6z time period, but confidence is too low to
include as a predominant group. Have a prob30 for now.

&&

.IWX WATCHES/WARNINGS/ADVISORIES...
IN...None.
OH...None.
MI...None.
MARINE...Small Craft Advisory until 4 PM EST this afternoon for LMZ043-
     046.

&&

$$

DISCUSSION...Steinwedel
AVIATION...MCD