652 
FXUS63 KARX 060751
AFDARX

Area Forecast Discussion
National Weather Service La Crosse WI
150 AM CST Sat Feb 6 2021

.SHORT TERM...(Today through Sunday Night)
Issued at 150 AM CST Sat Feb 6 2021

Coldest air of the season continues to spill into the region. 
Temperatures as of 2 am were in the single digits above and below 
zero with wind chills of 15 to 25 below zero. 

Arctic intrusion continues through the weekend with this cold 
cyclonic flow ushering in a couple weak mid-level shortwave troughs. 
One of these trough rolls off the Northern Rockies this morning, 
bringing the likelihood of some light snow today across the Plains 
into IA/IL. Our southern forecast area (far northeast IA into far 
southwest WI) looks to be on the very northern periphery of this 
light snow where a dusting to 1 inch of snow is possible. Otherwise, 
very cold conditions persist today with highs only in the single 
digits above zero under filtered sunshine. 

Clearing skies expected tonight as that wave moves of the region and 
arctic high builds in. Fresh/deeper snowpack and clearing skies will 
allow temperatures to plunge into the teens and a few lower 20s 
below zero. 

Sunday will see highs only in the single digits below to single 
digits above zero. Meanwhile, looks like another weak mid-level 
shortwave trough ripples eastward through the Plains/southern 
IA/central IL Sunday/Sunday night. This would keep light snow 
chances south of the area.

A wind chill advisory is in effect as well for much of the area 
through Sunday morning due to the combination of the very cold 
temperatures and northwest winds on the 5 to 15 mph, gusting around 
20 mph at times.

.LONG TERM...(Monday through Friday)
Issued at 150 AM CST Sat Feb 6 2021

Very cold Arctic airmass keeping us in its grip through this next 
week. Highs look to be in the single digits above/below zero with 
lows in the 10 to 20 below range. We will also see a couple chances 
for some light snow through the period as weak mid-level waves 
continue to ripple through this arctic baroclinic zone. 

&&

.AVIATION...(For the 06Z TAFS through 06Z Saturday night)
Issued at 947 PM CST Fri Feb 5 2021

Mainly VFR conditions expected through this TAF period. A period 
of mid-level clouds will spread across the region Saturday 
morning with clearing by late in the day. Any light snow 
associated with the trough passage is expected to remain south of 
the TAF sites. Winds will remain out of the northwest with gusts 
up to around 20 kts at times.

&&

.ARX WATCHES/WARNINGS/ADVISORIES...
WI...Wind Chill Advisory until noon CST Sunday for WIZ017-029-032>034-
     041>044-053.

MN...Wind Chill Advisory until noon CST Sunday for MNZ079-086>088-
     094>096.

IA...Wind Chill Advisory until noon CST Sunday for IAZ008>011-018-019-
     029.

&&

$$

SHORT TERM...DAS
LONG TERM...DAS
AVIATION...JM