Area Forecast Discussion
Issued by NWS La Crosse, WI

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FXUS63 KARX 150742

Area Forecast Discussion
National Weather Service La Crosse WI
242 AM CDT Thu Mar 15 2018

.SHORT TERM...Today through Friday Night
Issued at 242 AM CDT Thu Mar 15 2018

High pressure was building southward into the region from Canada
early this morning. Clear skies resulting with temperatures as of 2
am ranging from the upper teens to near 30.

For today, a sunny but slightly cooler day will be on tap for the
area as high pressure continues to build in. Plan on afternoon highs
in the middle 30s to the middle 40s. Clear skies for tonight,
although there will be some cirrus moving in west of the Mississippi
River after midnight ahead of low pressure moving into the Central
Plains. Otherwise, lows tonight are expected to bottom out in the
single digits/lower teens northeast of I-94 and mid-teens to lower
20s elsewhere.

Clouds will thicken south of I-90 Friday ahead of low pressure
moving from the Central Plains toward northern MO. High pressure
will do its best trying to keep us dry but GFS/EC brush portions of
northeast IA with some light precipitation in the afternoon. Dry
easterly outflow out of high pressure over the Great Lakes will
cause some evaporative cooling through the column, yielding mainly
rain but perhaps a mixing in with a little snow. Otherwise, look for
highs Friday in the middle 30s to the middle 40s.

Chance of precipitation spreads north Friday night, but confined
south of I-90. Soundings and model output indicate precipitation
transitions to light snow as temperatures cool with even some light
freezing rain a possibility. Could see 1/2 to an inch of snow
accumulation across portions of northeast IA into far southwest WI
with perhaps a light glaze of ice.

.LONG TERM...(Saturday through Wednesday)
Issued at 242 AM CDT Thu Mar 15 2018

The weekend is setting up to be very nice. Saturday will see
decreasing clouds as that low pulls into the Ohio River Valley and
high pressure builds in from the Northern Plains. Mainly sunny skies
expected by afternoon with temperatures topping off in the 40s to
near 50. Sunday looking even better as ridge of high pressure
remains in place. Plan on highs in the middle 40s to the middle 50s.

Rain chance move in Monday into Tuesday as another surface low
slides south of us and a mi-level trough moves in from the Northern
Plains. Will have to keep an eye on strength/longevity of the ridge
over us which may delay precipitation chances getting in here. Will
let the dayshift today assess this with morning model runs.

Wednesday looks dry with trough pulling east of the area.


.AVIATION...(For the 06Z TAFS through 06Z Thursday night)
Issued at 1140 PM CDT Wed Mar 14 2018

High pressure will result in VFR conditions at KRST/KLSE through
the period. Besides some cirrus, expect mostly clear/sunny skies.
Winds will be light and variable at KLSE overnight, increasing
from the north-northeast Thursday. At KRST, light northwest wind
overnight will gradually turn to the northeast Thursday.




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