Wednesday, February20, 2019 L-36.com


Marine Weather and Tides
Boscobel, 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 6:50AMSunset 5:42PM Wednesday February 20, 2019 4:20 PM CST (22:20 UTC) Moonrise 7:11PMMoonset 7:47AM Illumination 98% Phase: Waning Gibbous; Moon at 16 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 Boscobel, WI
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location: 43.14, -90.7     debug


Area Discussion for - La Crosse, WI
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Fxus63 karx 202104
afdarx
area forecast discussion
national weather service la crosse wi
303 pm cst Wed feb 20 2019

Short term (tonight through Thursday)
issued at 303 pm cst Wed feb 20 2019
water vapor imagery early this afternoon showed a shortwave trough
and mid-level dry punch lifting into the area while a broad upper
level circulation with several embedded troughs was spinning across
the northern plains. The primary warm advective frontogenetical snow
band continues to lift into northern wi while some additional snow
rotates northeastward in association with the mid-level trough. The
snow will diminish from the south and west late this afternoon and
this evening, exiting north-central wi late this evening. No changes
were made to headlines at this time, with advisories warnings in
effect until 6 pm for most of the area and until 9 pm in
clark taylor counties.

The upper trough will push north of the area overnight, gradually
shearing off to the east on Thursday within broadly confluent flow.

High pressure at the surface will sink south and east across the
region later tonight and Thursday with gradually clearing skies.

Clouds may remain more stubborn over northern wi, closer to the
departing trough. Highs will be in the 20s for most areas on
Thursday.

Long term (Thursday night through Wednesday)
issued at 303 pm cst Wed feb 20 2019
evolution of southwest flow aloft and vigorous wave energy ejecting
out of southwest u.S. Will bring numerous forecast challenges for
later periods, especially over the weekend. Until then, broad
ridging should bring at least a day and a half of welcomed quiet
weather.

Starting Friday evening, a smaller ejecting short wave and
associated warm air advection will spread some lighter precipitation
into the area. Temperatures aloft 700-900 mb layer will likely be
warming all evening so precipitation that does start off as light
snow could change into a mix of precipitation overnight. Could see
some light glazing before surface temperatures start to climb above
freezing in some areas during the day Saturday. Confidence still
rather low in details but could need an advisory at some point.

Medium range guidance still in fairly good agreement with much
stronger trough ejecting out of southwest Saturday night into Sunday
morning. This more dynamic system will have higher moisture to work
with, but also warmer temperatures, making return to a wet, heavy
snow threat. Track of surface low and associated temperatures will
be everything for this storm but our area still looks to be heavily
impacted, including threat for mixed precipitation, rain, heavy
snow, and blizzard-like winds conditions as storm exits early Sunday.

Have added some details to our forecast database a bit further out
than we would usually to try and get feel for snowfall and icing
amounts. Wet snow associated with lower liquid-snow ratios will need
to be tweaked as storm draws closer. Any mixed precipitation should
turn over to all snow quickly Saturday night with plenty of ice
saturation aloft and dynamic cooling which will erode warm layer.

20.12z models, like previous, continue to show main deformation area
could track right across forecast area. Potential for higher impact
storm certainly exists with details to be worked out next few days.

Even as snow ends Sunday, strong northwest winds in open areas could
produce significant blowing and drifting.

Some hydro concerns as well with a warmer system like this. If
warmer air wraps into system from the southeast, rain threat could
be a bit longer lived and given current snow pack, some melt and
threat for ice jams could develop.

As flow becomes a bit more zonal, and eventually more northwest next
week, have started a cooling trend in temperatures, including more
sub zero readings. Cloud cover will be player in that though, and
with type of flow setting up, might see weaker impulses sliding
through not only holding temperatures up from what they could bottom
out at, but also some light snow threats.

Aviation (for the 18z tafs through 18z Thursday afternoon)
issued at 1123 am cst Wed feb 20 2019
snow will continue through mid afternoon with primarily ifr
visibilities before conditions gradually improve through late
afternoon as the snow ends. MVFR ceilings will persist into
tonight with clearing expected after midnight tonight and a
return toVFR conditions expected. SE winds will become SW W late
this afternoon and tonight with occasional gusts to 20-25 kts at
times.

Arx watches warnings advisories
Wi... Winter storm warning until 6 pm cst this evening for wiz032>034.

Winter weather advisory until 6 pm cst this evening for
wiz041>044-053>055-061.

Winter storm warning until 9 pm cst this evening for wiz017-029.

Mn... Winter storm warning until 6 pm cst this evening for mnz079-
086>088-094>096.

Ia... Winter storm warning until 6 pm cst this evening for iaz008>010-
018-019-029.

Winter weather advisory until 6 pm cst this evening for iaz011-
030.

Short term... Jm
long term... Shea
aviation... Jm


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Boscobel, Boscobel Airport, WI2 mi28 minSW 107.00 miLight Snow35°F28°F78%1004.2 hPa
Prairie Du Chien Municipal Airport, WI24 mi26 minSW 11 G 145.00 miLight Snow33°F27°F79%1003.4 hPa

Wind History from OVS (wind in knots)
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Last 24hrS6S4CalmCalmCalmNE3N43NE5NE54NE4NE5NE5E9
G22
E9
G15
E8
G17
6E7E833S7SW10
1 day agoW5CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSW3CalmCalmCalmCalmCalmCalmCalmCalmCalmS4S4
2 days agoNE3NE9
G16
NE4NE4NE7
G17
NE3NE3CalmCalmN5CalmCalmCalmCalmCalmCalmCalmNE4SE3CalmW5W7N3NW3

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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wmap_A
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 (17,4,5,8)
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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.