Area Forecast Discussion
Issued by NWS La Crosse, WI

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FXUS63 KARX 170638

Area Forecast Discussion
National Weather Service La Crosse WI
140 AM CDT Sat Mar 17 2018

.SHORT TERM...(Today through Sunday)
Issued at 140 AM CDT Sat Mar 17 2018

Pleasant, spring-like weekend for the local area as high pressure at
the sfc and a loft meanders across the region. Clouds, any lingering
pcpn across the south will exit south/southeast early this morning
as the parent low pressure system spins toward the ohio river
valley. Ample sun for most this St Pats day. Expecting some increase
in clouds from the west on Sunday as saturation associated with a
shortwave trough kicking out of the Rockies works into the upper
level ridge. Temperatures look to top out 5 to 10 degrees above the
mid March normals - with some locations warming into the lower 50s.

.LONG TERM...(Monday through Friday)
Issued at 140 AM CDT Sat Mar 17 2018

Cooler start to the new work week as the upper level ridge breaks
down and a shortwave trough drops southeast across the area -
Tue/Wed time frame. Dry air remains in place though, and will work
against any potential pcpn chances as the system moves east. At this
time, favoring keeping it dry. Cooler, Canadian air works in
starting Mon, and temps back to the seasonable normals are expected
into mid week.

The next, best chance for widespread pcpn likely holding off until
Fri/Sat. Both the GFS and EC drive a shortwave trough through the
plains to across the upper/mid mississippi river valley. Good
southerly fetch ahead of the trough will supply plenty of moisture
to fuel pcpn development. Rain more likely south, snow to wintry mix
in the north - although detailing this far out problematic. Still,
this system poses the biggest threat for pcpn over the next 7 days.


.AVIATION...(For the 06Z TAFS through 06Z Saturday night)
Issued at 1153 PM CDT Fri Mar 16 2018

Low pressure over Kansas City will move across northern MO and into
southern IL tonight and Saturday morning, bringing with it lingering
wintry precipitation across much of IA and IL. This precipitation
will remain south of TAF airfields through the period. Expect BKN-
OVC cirrus to diminish from north to south with sunny/clear skies by
Saturday afternoon. Light easterly wind tonight will gradually turn
to the north-northeast, but become nearly calm late in the period as
high pressure builds across the region.




LONG TERM....Rieck
AVIATION...Rogers is the U.S. government's official web portal to all federal, state and local government web resources and services.