642
fxus63 kiwx 312157
afdiwx
area forecast discussion
national weather service northern indiana
457 pm est wed dec 31 2025
.key messages...
- snow returns this afternoon into this evening with totals
generally in the 1-2 inch range, locally 2-3" closer to lake
michigan. a few isolated snow squalls are also possible this
evening.
- seasonably cold and mainly dry thursday through this weekend.
&&
.update...
issued at 447 pm est wed dec 31 2025
quick update to speed up se progress of area of light snow,
which has already reaching i-69 corridor into nw ohio. smaller
flake size is limiting accumulation, but impacting vsbys to a
greater extent with pockets of 1/2 to 1 mile. overall snow
amounts remain unchanged, but will still need to monitor far nw
areas near lk mi for locally higher amounts.
also continuing to monitor a limited snow squall potential
along the arctic front, currently locations from southern wi to
south of kgrr. obs with this feature not differing a lot from
what is being seen ahead of the front wrt vsbys, but still worth
watching.
&&
.discussion...
issued at 108 pm est wed dec 31 2025
a vigorous mid level pv anomaly will drop southeast through the
eastern great lakes this afternoon into tonight. associated
height falls along with a subtle mid level impulse and favorable
left exit upper jet support (130 kt 250 mb jet) undercutting
this pv anomaly in northwest flow will allow light snow to
blossom over the local area between 19-22z. a brief period of
heavier snow showers (or possibly a few snow squalls) then
becomes a concern from north to south in the roughly the 22-03z
window along a sharpening low level baroclinic zone. 0-1 km
theta-e lapse rates near -1 to -2 k/km immediately along this
fgen response, maximized from the michigan border southeast
through northeast in and northwest oh with the greatest
potential for a few snow squalls. quick movement will hold snow
totals in the 0.5-2" range for most, with some lake enhancement
bringing totals more into the 2-3" around south bend and
southwest mi. untreated roads are likely slick and snow covered
for most this evening.
post-frontal caa and northwest flow will filter in then into
thursday with widely scattered lake effect flurries and snow
showers, mainly tonight in our typical nw flow les belts where an
additional inch of snow may fall. another low amplitude perturbation
follows through the great lakes later thursday into thursday night
with additional chances for snow flurries. the remainder of the week
into early next week appears relatively quiet and warmer otherwise
as heights relax into a lower amplitude west-northwest split flow
regime.
&&
.aviation /00z tafs through 00z friday/...
issued at 447 pm est wed dec 31 2025
main focus remains area area of light snow impacting both sites
into this evening. highly variable vsbys are expected in heavier
bands of snow showers. over ifr conditions to dominate with
occasional lifr in heavier bands through the first few hours of
the valid period. conditions do slowly improve thereafter,
especially at kfwa where brief window of lake effect will remain
confined in the ksbn area.
&&
.iwx watches/warnings/advisories...
in...none.
oh...none.
mi...none.
marine...small craft advisory until 4 pm est thursday for lmz043-046.
&&
$$
update...fisher
discussion...steinwedel
aviation...fisher