Marine Weather and Tides
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|Sunrise 6:56AM||Sunset 6:58PM||Tuesday September 25, 2018 8:42 AM CDT (13:42 UTC)||Moonrise 6:43PM||Moonset 6:17AM||Illumination 99%|
7 Day Forecast for Marine Location Near Elba, MNHourly EDIT Help
Area Discussion for - La Crosse, WI  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus63 karx 251140|
area forecast discussion
national weather service la crosse wi
640 am cdt Tue sep 25 2018
Short term (today through tonight)
issued at 243 am cdt Tue sep 25 2018
current surface map has a cold front draped from western lake
superior through southeast mn and central ia. IR surface
observations showing a broken line of cumulus ACCAS along and ahead
of the boundary, but radar showing any shra was confined just north
of the forecast area over northern wi where better convergence and
moisture pooling resided.
Water vapor imagery rap 500mb analysis has a deep and dynamic mid-
level trough progressing eastward across the central CONUS with a
vigorous embedded shortwave at the base of the trough entering
western nebraska. This wave will move up along the frontal boundary
that will be pushed through northeast to southwest wi by this
afternoon. This wave will work in conjunction with right entrance
region of 300mb jet, and increasing 850mb moisture transport
instability of 1000-2000j kg MUCAPE (nam). In addition, 850-500mb
frontogenesis is looking fairly impressive as well. So, what does
all this mean? Showers and scattered storms will be the end result,
with a few of the storms possibly strong to severe from central to
southwest wi northeast ia. Skinny CAPE per bufkit combined with 0-
3km bulk shear of 30-40kt would suggest damaging wind being the main
threat. The highest threat area right now appears to be southeast of
a mauston wi-prairie du chien wi-oelwein ia line.
Mid-level trough pushes surface low and cold front east of the area
this evening, pushing any lingering showers storms east of the area
by later in the evening. Cold air advection then for the rest of
tonight with partial clearing. Plan on overnight lows in the upper
30s to the middle 40s.
Long term (Wednesday through Monday)
issued at 243 am cdt Tue sep 25 2018
breezy, cool and partly cloudy conditions will be seen Wednesday
with highs topping off only in the middle 50s to the lower 60s.
Another cold front swings through the region late Wednesday night
through Thursday resulting in scattered showers. Continued
unseasonably cool Thursday with highs in the upper 50s lower 60s.
Mid-level shortwave trough rotates through the region Thursday night|
into Friday along the cold frontal boundary just to our south.
Isentropic upglide over the frontal boundary and mid-level
frontogenesis will produce a band of rain, but exact location not
determined yet. ECMWF would suggest almost all of our area would see
rain with the GFS suggesting mainly south of i-90. Either way, looks
like a rather raw day with highs only in the 50s.
Gfs and ECMWF push the bulk of the rain out by Saturday as high
pressure builds in from the northern plains. Otherwise, another
chilly day on tap under partial sunshine as highs top off in the 50s.
Cyclogenesis on the leeside of the rockies later Sunday into Monday
will push a warm front northward through the plains ia il.
Increasing moisture transport isentropic lift over this frontal
boundary will produce a good chance of showers for the area.
Aviation (for the 12z tafs through 12z Wednesday morning)
issued at 640 am cdt Tue sep 25 2018
lower stratus continues to gradually slide east in the wake of a
passing cold front this morning, with ceilings mainly MVFR at lse
and primarily ifr at rst expected through the afternoon hours. We
should see a batch of showers develop and move across much of the
region by late morning and into mid afternoon, with even a few
rumbles of thunder possible. In the wake of departing rain by
mid-late afternoon, a brief window of gustier northwest winds is
expected, with clouds then scattering out this evening and
overnight as drier air works into the area. However, could still
see some ceilings (mainlyVFR to high-end MVFR) at times for both
lse and rst, particularly later tonight with some hints of
additional thicker stratocumulus clouds arriving beneath quite
cool air aloft.
Arx watches warnings advisories
Short term... Das
long term... Das
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|Winona, Winona Municipal Airport-Max Conrad Field, MN||16 mi||48 min||N 3||10.00 mi||Overcast||59°F||53°F||82%||1011.8 hPa|
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Wind Forecast for La Crosse, WI (9,2,3,4)(on/off)  Help
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