Area Forecast Discussion
Issued by NWS La Crosse, WI

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FXUS63 KARX 242115
AFDARX

Area Forecast Discussion
National Weather Service La Crosse WI
315 PM CST Fri Feb 24 2017

.SHORT TERM...(This evening through Saturday)
Issued at 314 PM CST Fri Feb 24 2017

At 3 PM, a 960 mb surface low was located near Benton Harbor
Michigan. The deformation band with this system is currently
moving east across southeast Minnesota and northeast Iowa.
The 29.12z models are in good agreement that this snow band will
move east across the area tonight and it will likely exit the
area by 3 AM Saturday morning. Additional snow amounts will be up
to 2 inches.

With the surface pressure gradient looking less tight and the low
level lapse rates not as steep tonight, lowered the sustained wind
speeds into the 15 to 25 mph range and wind gusts into the 25 to
35 mph range. This will cause some blowing and drifting snow. As a
result...kept the Winter Weather Advisory going tonight.

.LONG TERM...(Saturday night through Friday)
Issued at 314 PM CST Fri Feb 24 2017

On Saturday night and Sunday, a weak short wave trough will move
quickly through the region. With limited moisture across the
area, any snow accumulations will be very light. At this time,
only anticipating up to a half inch of snow north of Interstate
90.

On Tuesday, another quick moving low pressure system will move
through the region. Warm air advection ahead of this system will
provide just enough warming in the atmospheric column for a rain
south of Interstate 90. Elsewhere the precipitation will be a mix
of rain and snow. QPF amounts look to be up to a quarter of an
inch.

On Thursday and Thursday night, a clipper system will move
southeast through norther Minnesota and northern Wisconsin. With
the best moisture transport and lift north of the area. Not
anticipating any impacts from this system at this time.

&&

.AVIATION...(For the 18Z TAFS through 18Z Saturday afternoon)
Issued at 1144 AM CST Fri Feb 24 2017

Messy wintry storm continues across the area with one more batch
of snow expected to work through the region this afternoon and
into the evening hours before tapering off. Overall IFR conditions
will prevail, with a few hour period of more enhanced snowfall
possible, especially at RST, though it appears the risk for
widespread blowing snow is quickly waning. Still, an additional
few inches of accumulation remains possible before precipitation
ends near or before midnight. Ceilings are then expected to
gradually lift overnight, scattering out on Saturday as high
pressure works in our direction. Winds will remain northerly at 10
to 20 knots with higher gusts at RST overnight, shifting
northwesterly and slowly diminishing Saturday morning.


&&

.ARX WATCHES/WARNINGS/ADVISORIES...
WI...Winter Weather Advisory until 6 AM CST Saturday for WIZ017-029-
     032>034-041>044-053>055-061.

MN...Winter Weather Advisory until 6 AM CST Saturday for MNZ079-
     086>088-094>096.

IA...Winter Weather Advisory until 6 AM CST Saturday for IAZ008>011-
     018-019-029-030.

&&

$$

SHORT TERM...Boyne
LONG TERM...Boyne
AVIATION...Lawrence


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