Area Forecast Discussion
Issued by NWS La Crosse, WI

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354
FXUS63 KARX 221137
AFDARX

Area Forecast Discussion
National Weather Service La Crosse WI
537 AM CST Wed Nov 22 2017

.SHORT TERM...(Today through Thursday Night)
Issued at 249 AM CST Wed Nov 22 2017

Surface map early this Wednesday morning has high pressure centered
over eastern KS/NE with ridge extending northward into the Upper
Mississippi River Valley Region. Mostly clear skies across much of
the area with the exception of some stratocumulus and occasional
flurries across north central WI. Otherwise, temperatures across the
area as of 2 am ranged from the teens to lower 20s with northwest
winds generally 10 mph or less.

The area/ridge of high pressure will drift southeast of the region
today as a wave of low pressure drops southeast out of Alberta into
the Northern Plains. Mostly sunny skies expected this morning but
then lift ahead of the approaching Northern Plains low will produce
a rapid uptick in mid/high level cloudiness through the afternoon
with the possibility of a few flurries by early evening. Otherwise,
plan on highs in the upper 20s to the middle 30s.

The wave of low pressure moves southeast through the area tonight,
spreading the likelihood of some light snow across north central WI,
including Clark Taylor counties. Scattered flurries are expected
across the remainder of the area, Snowfall looks to be a trace to as
much as a light dusting/few tenths of an inch across Clark/Taylor
counties. Overnight lows will be in the 20s.

Thanksgiving Day looks fantastic as a weak ridge of high pressure
drifts across the region. Mostly sunny skies are expected with highs
topping off in the upper 30s to the middle 40s.

.LONG TERM...(Friday through Tuesday)
Issued at 249 AM CST Wed Nov 22 2017

Low pressure tracking through southern Canada/Ontario will drag a
cold front through the area Friday afternoon/Friday evening for a
chance of rain. Breezy southerly flow ahead of the approaching cold
front will boost highs into the upper 40s to middle 50s.

Weather through the weekend into Monday looks quiet with
temperatures right around seasonal norms as a ridge of high pressure
drifts through the region.

GFS/ECMWF in good agreement in taking an area of low pressure out of
the Central Plains into the Upper Mississippi River Valley Tuesday.
Right now looks like better saturation will be along/north of I-90
for a rain/snow morning mix and all rain by afternoon as
temperatures climb into the 40s.

&&

.AVIATION...(For the 12Z TAFS through 12Z Thursday morning)
Issued at 537 AM CST Wed Nov 22 2017

As a low pressure approaches the area, the clouds will gradually
increase across the area. The ceilings will descend from around
20k feet late this morning to around 5K feet by early this
evening.

For areas north of Interstate 94, up to a half inch of snow is
expected this evening.

The winds will be mainly south at 6 to 12 knots through much of
the TAF period.

&&

.ARX WATCHES/WARNINGS/ADVISORIES...
WI...None.
MN...None.
IA...None.
&&

$$

SHORT TERM...DAS
LONG TERM....DAS
AVIATION...Boyne



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