Saturday, October23, 2021
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Marine Weather and Tides
Boscobel, WI

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 7:24AMSunset 6:09PM Saturday October 23, 2021 3:52 PM CDT (20:52 UTC) Moonrise 6:48PMMoonset 9:24AM Illumination 91% 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 Boscobel, WI
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location: 43.14, -90.7     debug


Area Discussion for - La Crosse, WI
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FXUS63 KARX 231941 AFDARX

Area Forecast Discussion National Weather Service La Crosse WI 241 PM CDT Sat Oct 23 2021

SHORT TERM. (This evening through Sunday) Issued at 241 PM CDT Sat Oct 23 2021

Heading through the remainder of the weekend, attention will focus on a shortwave trough that will begin to intensify as it progresses across the central plains on Sunday. In advance of the trough, some increase in mid/high level cloudiness is expected overnight in association with mid-level warm advection. Temps will fall into the mid 20s to upper 30s, but since most areas have fallen near or below freezing in the past few days, freeze/frost products will no longer be issued until next spring.

The main forecast question for Sunday will be the timing/northward progression of rain north of a surface low that is expected to track generally eastward from northern KS to northern MO through the day. Mid-level synoptic lift will gradually increase ahead of the trough, but there will be low- level dry air to overcome, especially with persistent easterly flow north of the surface low and the stronger moisture transport remaining well south. As a result, some of the initial forcing will go into moistening of the lowest levels of the atmosphere, possibly slowing the northward push of any consequential/heavier shower activity. Regardless, expect areas of showers to gradually spread northward through the afternoon associated with bands of low to mid-level frontogenesis/warm advection. Overall, the highest chances for rain during the day look to be across NE IA and SW WI before tapering north of I-90. Instability will remain primarily south of the region so thunder is unlikely. East winds will increase through the afternoon, gusting in the 25 to 35+ mph range, especially across NE IA and SW WI.

LONG TERM. (Sunday night through Saturday) Issued at 241 PM CDT Sat Oct 23 2021

The concern for how far north the rain will get continues into Sunday night as the system begins to pull away from the region. With the area staying on the north and cool side of the system the best forcing will pass by to the south. Some mid-level frontogenesis does look to form north of the surface low and extend about as far north as the Interstate 90 corridor Sunday evening. The large area of surface high pressure over the area now will shift off to the northeast but will remain strong and provide a dry east-northeast flow into the area. With the exception of the 23.12Z GFS, almost all the other models, including the hi-res meso-scale ones, show the rain not extending much past the Interstate 90 corridor with the best rain staying south of the Iowa/Minnesota border.

The area of high pressure will build back into the region Monday behind the system and remain over the area through Tuesday. The high will then pushed off to the east ahead of the next system for the middle of next week. The models are becoming more diverse with their solutions for this system leading to a diminished confidence in the eventual outcome. While large scale long wave troughing is still expected east of the entire length of the Rockies, how individual short wave troughs are handled are leading to the differences. A strong short wave trough is expected to be in the equatorial end of the long wave trough and form a deep closed low with the 23.00Z ECMWF the first to do this over Texas and Oklahoma while the 23.12Z GFS later and a bit farther north with the 23.12Z GEM the slowest and farthest north. These differences result in varying times when precipitation could move into the area along with amounts. With such an amplified pattern, very low confidence on which model trend is correct at this time.

AVIATION. (For the 18Z TAFS through 18Z Sunday afternoon) Issued at 1136 AM CDT Sat Oct 23 2021

VFR conditions will persist through Sunday morning with gradually increasing and lowering mid/high clouds tonight into Sunday ahead of a low pressure system. Expect higher rain chances to hold off until beyond 24.18Z. Light winds will become easterly, increasing to 10 to 15 kts Sunday morning with gusts of 20 to 30 kt possible by afternoon.

ARX WATCHES/WARNINGS/ADVISORIES. WI . None. MN . None. IA . None.

SHORT TERM . JM LONG TERM . 04 AVIATION . JM


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Boscobel, Boscobel Airport, WI2 mi60 minW 310.00 miFair55°F32°F42%1017.3 hPa
Prairie Du Chien Municipal Airport, WI24 mi58 minN 010.00 miFair51°F33°F50%1016.6 hPa

Link to 5 minute data for KOVS

Wind History from OVS (wind in knots)
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1 day agoN12
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