Sunday, November18, 2018 L-36.com


Marine Weather and Tides
Sparta, WI

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:03AMSunset 4:37PM Sunday November 18, 2018 10:56 AM CST (16:56 UTC) Moonrise 2:41PMMoonset 1:43AM Illumination 81% Phase: Waxing Gibbous; Moon at 11 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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7 Day Forecast for Marine Location Near Sparta, WI
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location: 43.93, -90.81     debug


Area Discussion for - La Crosse, WI
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Fxus63 karx 181120
afdarx
area forecast discussion
national weather service la crosse wi
520 am cst Sun nov 18 2018

Short term (today through Tuesday night)
issued at 213 am cst Sun nov 18 2018
the next short wave trough was topping the western ridge axis
early this morning and will drop rapidly southeast and across the
upper midwest and great lakes late tonight through Monday morning.

The best PV advection in the 500-300 mb layer will sweep across
northeast minnesota, lake superior and northern wisconsin coming
close enough to bring some weak PV advection across the far
northern portions of the area late tonight. The area of low
pressure at the surface with this system looks to move across
southern minnesota into central wisconsin with the best chances
for saturation occurring north of the low track. Ahead of the low
in the warm air advection zone, there should be 2 to 3 ubar S of
up glide on the 280k isentropic surface. While this does not look
to be enough to allow saturation to occur, it does look to set the
stage for saturation and precipitation to occur once the
frontogenesis moves through. This does not look to be all that
strong but should extend through the 850 to 500 mb layer and help
to produce some light precipitation from about u.S. Highway 10 and
north across north-central wisconsin. The highest chance for
precipitation will be across northern taylor county and will raise
those chance into the 50 to 60 percent range. QPF amounts look to
be rather light which will keep snowfall accumulations under an
inch for the most part.

There will be another chance for some light precipitation across
north-central wisconsin Tuesday afternoon and evening. By this
time, the western ridge axis will have slid east into the rockies
which will push the main band of westerlies farther east as well.

The short wave trough coming over the ridge axis will thus track
farther northeast across southern ontario, just grazing the
northern great lakes keeping the PV advection well northeast of
the area. The area of low pressure at the surface also looks to
stay well to the northeast of the area but 3 to 4 ubar S of
isentropic up glide on the 280k surface should move across the
northern portions of the forecast area Tuesday afternoon followed
by some weak frontogenesis in the 850-700 mb layer Tuesday
evening. This may be enough to generate some light precipitation
and will have some 20 to 30 percent chances in to cover this
possibility.

Long term (Wednesday through Saturday)
issued at 213 am cst Sun nov 18 2018
a large area of high pressure will follow behind the Tuesday
system coming out of central canada with the center of the high
going across the great lakes into the northeast u.S. Through
thanksgiving. This will set up a southwest return flow of warmer
air that will allow highs to warm into the 30s Wednesday and then
reach the 40s by Friday.

The longer range models are then diverging in their solutions for
late next week. The upper level ridge axis will continue to move
east and across the central part of the country as long wave
troughing moves onshore from the pacific. Right now, the
differences are focused on how the models handle a short wave
trough in the base of the long wave trough. The 18.00z GFS keep
the short wave trough embedded in the long wave trough and is
rather progressive bringing the system across the central part of
the country by Friday. The 18.00z ECMWF suggests the short wave
trough will help form an upper level low that becomes detached
from the long wave trough as it shears out over the upper midwest.

It then takes this upper level low well south of the area before
cutting it off over the ohio river valley Saturday. These
differences are also evident in the precipitation chances with the
gfs bringing precipitation across the area Friday and Friday night
when the ECMWF is dry. Way too early to know which model has the
better solution will have some mention of precipitation chances
from Friday through Saturday.

Aviation (for the 12z tafs through 12z Monday morning)
issued at 520 am cst Sun nov 18 2018
high pressure will provideVFR condition through today with
southwest winds generally 12kt or less. Low pressure tracking
across the northern plains into central wi by late tonight will
spreadVFR mid-level clouds with bases generally at or above 7kft
into the krst klse sites after midnight. Looking further, will
have to watch for the potential or MVFR cloud after 12z Monday
behind a passing cold front. More detail will be provided with the
18z TAF issuance.

Arx watches warnings advisories
Wi... None.

Mn... None.

Ia... None.

Short term... 04
long term... 04
aviation... Das


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Sparta, Sparta / Fort McCoy Airport, WI4 mi82 minN 010.00 miFair17°F12°F82%1025.7 hPa
Black River Falls Area Airport, WI22 mi62 minSW 510.00 miFair20°F9°F63%1024.7 hPa
La Crosse - La Crosse Regional Airport, WI24 mi64 minS 610.00 miFair17°F7°F64%1028.1 hPa

Wind History from CMY (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
1 day agoW9W8W5CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
2 days agoS8S7
G16
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S4S4CalmS6CalmS3CalmCalmCalmCalmCalmNW10
G16
W9
G14
NW10W11
G18
W10
G15
NW4W13
G18
CalmW9

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map and Satellite Images
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GOES Local Image of    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for La Crosse, WI (11,2,3,4)
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Ground Weather Radar Station La Crosse, WI
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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.