Saturday, January20, 2018 L-36.com


Marine Weather and Tides
Boscobel, WI

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 7:24AMSunset 5:03PM Saturday January 20, 2018 8:39 PM CST (02:39 UTC) Moonrise 9:30AMMoonset 8:40PM Illumination 19% Phase: Waxing Crescent; Moon at 4 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 202309
afdarx
area forecast discussion
national weather service la crosse wi
510 pm cst Sat jan 20 2018

Short term (this evening through Sunday)
issued at 305 pm cst Sat jan 20 2018
water vapor imagery early this afternoon showed a plume of mid to
high level moisture streaming eastward within zonal flow ahead of an
upper trough over the great basin that will become the focus of the
forecast heading into late in the weekend. Another mild night is on
tap with temps only falling into the 20s along with a canopy of high
clouds and some low cloud fog development as low-level moisture
begins to work northward ahead of the system approaching from the
west. As warm, moist air begins to nose northward on Sunday, some
freezing drizzle transitioning to drizzle is possible, especially
along and south of i-90, which could lead to a few slick spots on
roads.

Long term (Sunday night through Saturday)
issued at 305 pm cst Sat jan 20 2018
a winter storm remains set to impact the upper midwest Sunday
night into Monday night, with model guidance continuing to come
into better agreement leading to increasing overall confidence.

However, with the local area likely to be in the messy transition
zone area, there is still some uncertainty as to impacts.

With the 20.12z guidance there is better consensus that the
surface low will track from eastern kansas Sunday evening
northeastward to central lake michigan by Monday evening.

Accompanying low to mid-level thermal fields are also more
consistent among models. With strong low-level warm moist
advection developing Sunday night, temps likely won't budge much
overnight, remaining in the upper 20s to mid 30s. Moisture will
not be an issue with this storm with a strong low-level gulf
moisture tap. Consensus is for 0.75 to 1.00 inches of QPF over
most of the area from Sunday night through Monday night. The
initial slug of heavier precip should come in later Sunday night
into Monday morning along with a tongue of warm air aloft. This
should keep liquid the dominant precip type across much of
northeast iowa and southwest wisconsin. Cold enough mid-level
temps will likely keep the dominant precip type as snow across
parts of southeast minnesota through north-central wisconsin. In
between it still looks like a messy wintry mix of freezing
rain rain sleet. Up to a tenth or two of ice is possible depending
on surface temps. Precip type could be impacted by intensity,
with some hints of embedded convective elements with the surge of
moisture advection. With high enough rates, would have to keep an
eye on a possible transition to snow during this time if the
strong lift can overcome the warm nose with some quick
accumulations around the morning commute. Regardless, for much of
the area, the Monday morning commute could be a difficult one.

Consensus is for the longer lasting heavy deformation zone snowfall
area to set up from south-central minnesota northeastward through
north-central wisconsin with the heaviest snow falling during the
day Monday, including parts of southeast minnesota. Gusty
northerly winds by Monday afternoon could lead to some
blowing drifting as well in southeast minnesota. Snowfall amounts
over 6 inches are expected within this band. Given some
uncertainty with the southward extent of the heaviest snow, will
maintain the winter storm watch as is for now but did delay the
onset times a few hours given a slightly slower evolution. To the
southeast of the heavy snow band closer to the surface low, as
drier mid-level air is advected northward, precip intensity will
wane and be more of a light rain drizzle Monday afternoon evening
with loss of cloud ice before perhaps some light snow moves in on
the backside of the system Monday evening.

The system will exit to the east on Tuesday with cooler but
seasonable highs and some decrease in clouds through the day.

There is some indication that a weak clipper system could pass
through the area Tuesday night into Wednesday, but not expecting
any precipitation at this time. Upper-level ridging will build in
for Thursday and Friday, allowing temperatures to rise well above
normal. Models are then in agreement with a deepening shortwave
ejecting off the rockies towards the mississippi river valley for
late Friday into Saturday, producing chances for rain and snow.

Aviation (for the 00z tafs through 00z Sunday evening)
issued at 510 pm cst Sat jan 20 2018
cigs wx vsby: high mid level clouds look to hang around through the
night, cutting into potential for fog. Meanwhile to the south, an
area of MVFR CIGS is making very slow progress northward from
southern ia, with the NAM rap models not reaching the TAF sites til
closer to 00z mon. Expect some fog to form in the clear slot between
where the high clouds lie and those low clouds to the south. Have
made some significant changes to the forecast with this in mind -
favoringVFR CIGS and bringing some MVFR br into krst for sun
morning - holding off on anymore more restrictive. Will monitor this
scenario closely, and make adjustments updates as needed.

Rain drizzle should start to spread across the TAF sites near 00z
mon, becoming more of a snow wintry mix toward 06z. The pcpn will
continue to become more widespread and heavier in nature as we move
toward 12z mon. CIGS will fall and so will vsbys.

Winds: light and variable into Sun morning, becoming more northeast
and increasing late in the day Sunday.

Arx watches warnings advisories
Wi... Winter storm watch from late Sunday night through Monday evening
for wiz017-029-032>034.

Mn... Winter storm watch from late Sunday night through Monday evening
for mnz079-088.

Winter storm watch from Sunday evening through Monday evening
for mnz086-087-094-095.

Ia... None.

Short term... Jm
long term... Jm hollan
aviation... Rieck


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Boscobel, Boscobel Airport, WI2 mi47 minN 07.00 miFair31°F27°F85%1014.8 hPa
Prairie Du Chien Municipal Airport, WI24 mi45 minN 010.00 miFair33°F28°F85%1013.5 hPa

Wind History from OVS (wind in knots)
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Last 24hrSW7SW6SW4SW4SW3S3CalmCalmCalmCalmCalmCalmCalmCalmCalmNE3NE4CalmCalmNE3NE3CalmCalmCalm
1 day agoSW6CalmW3SW3CalmSW3SW5SW4SW3SW3CalmSW3SW4SW8SW10SW8SW10S9S12
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2 days agoSW7SW9SW11
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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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Weather Map
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IR Satellite Image from GEOS
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GOES Local Image of Midwest    EDIT
Geos

Wind Forecast for La Crosse, WI (21,6,7,8)
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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.