Friday, February22, 2019 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 6:51AMSunset 5:45PM Friday February 22, 2019 9:12 PM CST (03:12 UTC) Moonrise 9:41PMMoonset 8:52AM Illumination 86% Phase: Waning Gibbous; Moon at 18 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 222341
afdarx
area forecast discussion
national weather service la crosse wi
541 pm cst Fri feb 22 2019

Short term (this evening through Saturday)
issued at 319 pm cst Fri feb 22 2019
for tonight, moderate to strong 925 and 850 mb moisture transport
will move northward into the area. The strongest will be along and
south of the interstate 90 corridor. This will be bring a nose of
warm air (1 to 4c) between 900 and 750 mb northward into
southwest wisconsin and parts of northeast iowa overnight. As this
occurs, snow will transition to sleet and then freezing rain. Ice
accumulations will be up to 2 tenths of an inch. Elsewhere in
southeast minnesota and north of i-90 in wisconsin, the
precipitation will start off a freezing drizzle or light freezing
rain and then it will transition to snow as ice aloft moves into
the region. Ice accumulations will range from a light glaze to a
tenth of an inch. Snow amounts will likely range from 1 to 2
inches. Due to this, the winter weather advisory was expanded to
cover the entire area.

On Saturday morning, the warm aloft will continue to surge
northward into the i-94 and i-90 corridors. As this occurs, the
precipitation will gradually change over to sleet and freezing
rain... And then to rain by late morning and afternoon. Further
south, the freezing rain will change over rain. In addition, with
the mixed layer capes climbing up to 250 j kg, there will be
isolated to scattered thunderstorms.

On Saturday afternoon, the precipitation will be in a lull period
between the 2 systems, so it will be either dry or there will be
periodic light precipitation.

Long term (Saturday night through Friday)
issued at 319 pm cst Fri feb 22 2019
on Saturday night, the models are in good agreement that a
deepening surface low will be moving through southern and eastern
wisconsin. The main question remains is where will the narrow
deformation band be located. Both the nmm and arw have it across
southwest and central wisconsin. Rap, hrrr, and ECMWF has its
band on the eastern edge of the winter storm watch and it would
impact decorah, charles city, la crosse, and black river falls.

Meanwhile, the nam, NAM nest, and GFS are on the western periphery
of the winter storm watch. In all cases, the snow totals look to
be in the 6 to 10 inch range with some higher totals possible. A
narrow 4 to 6 band of snow will surround the main snow axis. Due
to the uncertainty in the location of this band, stayed with nws
green bay and kept the winter storm watch as is for now.

From late Saturday night into Sunday, the surface pressure
gradient will dramatically increase across the area. In addition,
steep 1000 to 850 mb lapse rates will allow for higher winds from
aloft to mix to the surface. Sustained winds will be in the 20 to
30 mph range. Wind gusts will be primarily in the 35 to 45 mph
range. There will be likely some wind gusts as the lower 50s. If a
isallobaric component comes into play, these wind gusts may be
even higher. This will result in considerable blowing and drifting
snow with some whiteouts likely.

Aviation (for the 00z tafs through 00z Saturday evening)
issued at 541 pm cst Fri feb 22 2019
enjoy the quiet andVFR conditions through the evening, as a
complex and multi-faceted winter storm will begin to impact the
region later tonight through Saturday night. Through 06z, looking
for just some thickening mid level clouds at rst and lse, with
just a low end risk for a few snowflakes falling just after 06z
from those clouds. However, a batch of mixed snow and freezing
rain looks to work through those same locations roughly 08z
through 14z, with exact precipitation type very difficult to
predict for any given hour. Snow amounts of 1 to 2 inches and some
light ice accumulation appear likely for both lse and rst before
precipitation tapers to light rain or freezing rain (depending on
temperatures) Saturday morning and much of the afternoon, while
conditions dip to ifr or lifr levels everywhere.

A much more robust area of precipitation then looks to arrive
toward very late afternoon and evening (close to 23-01z per
current expectations), with lse actually standing a decent shot to
see even a few thunderstorms while rst sees heavy snow develop
quickly. Just beyond the current TAF period, very heavy snow is a
possibility for both rst and lse, with snowfall rates of 1 to 3
inches per hour possible for a few hours. Winds will remain 5 to
10 knots from the southeast overnight and gradually shift
northeast 10 knots or less on Saturday before rapidly increasing
just after 00z, with some potential for gusts of 40-45 knots at
both lse and rst. Significant impacts to airport operations are
likely!

Arx watches warnings advisories
Wi... Winter weather advisory from midnight tonight to 9 am cst
Saturday for wiz032-033-041-053>055-061.

Winter storm watch from Saturday evening through Sunday
afternoon for wiz017-029-032>034-041.

Winter weather advisory from midnight tonight to noon cst
Saturday for wiz017-029-034-042>044.

Mn... Winter weather advisory from midnight tonight to 9 am cst
Saturday for mnz079-086>088-094>096.

Winter storm watch from Saturday evening through Sunday
afternoon for mnz079-086>088-094>096.

Ia... Winter weather advisory from midnight tonight to 9 am cst
Saturday for iaz008>011-018-019-029-030.

Winter storm watch from Saturday evening through Sunday
afternoon for iaz008>010-018-019.

Short term... Boyne
long term... Boyne
aviation... Lawrence


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Sparta, Sparta / Fort McCoy Airport, WI4 mi78 minN 010.00 miOvercast32°F18°F57%1026.4 hPa
Black River Falls Area Airport, WI22 mi78 minNE 410.00 miOvercast30°F16°F57%1026.7 hPa
La Crosse - La Crosse Regional Airport, WI24 mi80 minENE 69.00 miOvercast33°F18°F54%1027.1 hPa

Wind History from CMY (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
1 day agoW9
G16
W10
G17
W8
G19
W4
G14
W5SW8CalmW4CalmCalmCalmW5CalmCalmCalmW6CalmCalmCalmCalmCalmCalmCalmCalm
2 days agoCalmCalmCalmCalmCalmCalmE5CalmE7E9E12
G18
E12
G15
E14E12
G17
E13
G16
E8
G14
SE9
G15
CalmCalmCalmCalmW6
G16
SW8
G18
W5
G15

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for La Crosse, WI (22,6,7,8)
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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.