969
fxus63 kiwx 082326
afdiwx
area forecast discussion
national weather service northern indiana
626 pm est mon dec 8 2025
.key messages...
- cold wind chills tonight near zero.
- seasonably mild temperatures with periods of snow and a rain
mix through wednesday night before turning back over into snow
showers. travel impacts appear limited at this time.
- turning very cold again late this week into the weekend with
highs only in the teens and low temperatures in the single
digits.
&&
.discussion...
issued at 253 pm est mon dec 8 2025
another cold night tonight however increase in clouds with a
shortwave disturbance moving eastward across the region may
once again keep temperatures a tad warmer. this coupled with the
beginning of a warm advection influx that will strengthen ahead
of a stronger disturbance in the form of a clipper type system
that will move through the great lakes region tomorrow. we will
see some light chances of snow showers with light accumulations
expected mainly north of us-30 this evening. however, the better
chances will be along the mi/in state line.
with the clipper system moving through to the north of our cwa
the waa plume will push northward into the area and bring warmer
temperatures for tomorrow and wednesday. highs each day will
finally warm to above freezing with values in the mid to upper
30s expected. this will also make the precipitation forecast a
bit more difficult especially at the onset of precipitation
tomorrow early evening for the northwestern portions of our area
then spreading southeasterly across the remainder of the cwa.
there is concern that there may be some freezing rain with the
onset of precipitation with the expectation of a mix of rain and
snow which any liquid precipitation would likely freeze on
contact with the still very cold surfaces being in the icebox
over the last 11 days or so. the periods of rain or snow or the
combination of the two will continue through wednesday early
afternoon before beginning to switch over to all light snow
showers by wednesday night with colder air advecting southward
across the area with a trough axis associated with a upper level
low centered over the hudson bay canada region. any snowfall
accumulations will be light with this system. winds will be
gusty through this event especially on wednesday with the
arrival of the trough. gales on lake michigan look to be
likely.
this trough will also push down another punch of arctic air
across the area for the end of the week and through the weekend.
high temperatures on thursday and friday will again return to
below freezing with values in the mid to upper 20s. this trend
to colder will continue into the weekend with the coldest
temperatures on saturday and sunday with highs only in the teens
and lows in the single digits. will need to monitor the wind
chills especially for saturday as gusty winds look to be in play
with the tighter pressure gradients in place.
&&
.aviation /00z tafs through 00z wednesday/...
issued at 625 pm est mon dec 8 2025
on the heels of a departing surface high pressure system, a weak
shortwave moves eastward through the great lakes region, north of
our area. this allows for a chance for some snow, primarily at sbn
and mainly after 6z. it may actually be that the more impactful
conditions come after the snow though as cigs begin to drop into
mvfr with subsidence on the back side of the now departing shortwave
paired with a brief area of mid level caa. however, it also appears
that given the waa, there may be a couple hours of vis reduction at
fwa. have handled it with a prob30 group for now.
winds will be on the steady increase between tonight and tuesday the
gradient between systems increasing. southeast winds tonight become
southwesterly with gusts up to 25 kts possible starting as early as
sunrise.
&&
.iwx watches/warnings/advisories...
in...none.
oh...none.
mi...none.
marine...small craft advisory from 10 pm this evening to 10 pm est
tuesday for lmz043-046.
gale watch from tuesday evening through wednesday evening for
lmz043-046.
&&
$$
discussion...andersen
aviation...roller