Sunday, September24, 2017 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 6:52AMSunset 6:56PM Sunday September 24, 2017 6:00 PM CDT (23:00 UTC) Moonrise 10:14AMMoonset 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
    EDIT      (on/off)   Help
7 Day Forecast for Marine Location Near Boscobel, WI
   Hourly   EDIT   Help
location: 43.14, -90.7     debug


Area Discussion for - La Crosse, WI
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus63 karx 242010
afdarx
area forecast discussion
national weather service la crosse wi
310 pm cdt Sun sep 24 2017

Short term (this evening through Monday)
issued at 310 pm cdt Sun sep 24 2017
not much change with the overall pattern this afternoon, with
upper level ridging over the eastern half of the CONUS and a
trough to the west. A slow-moving cold front extended from western
minnesota southwest into western kansas.

Very warm air remained over the forecast area this afternoon,
with 925 mb temps only 1-2c cooler than Saturday, leading to highs
in the upper 80s to lower 90s once again. There were even some
records tied or broken. Please see the climate section below for
more details on the records at rochester and la crosse.

Attention then turns to timing of precipitation and cloud cover
overnight and into Monday. The upper level ridge will begin to
slide off to the east, allowing the cold front and associated
precip clouds to move into the area. The 24.12z GFS and ECMWF both
bring precip into the far western portions of the forecast area
during the overnight hours. Both models also show over 1000 j kg
of mucape, so should see some thunder as the precip moves through.

That said, moisture transport looks to be fairly weak and the
strongest frontogenesis is confined to the 900 mb layer, so
currently thinking showers will decline in coverage as they move
through and thunder will become more embedded in nature. Also, do
not expect any severe weather with this system, as the strong deep
layer shear will remain behind the front.

Long term (Monday night through Sunday)
issued at 310 pm cdt Sun sep 24 2017
from Monday night into Tuesday morning, a cold front will move
east through the region. It continues to look like that much of
the synoptic forcing will move northwest and north of the area as
the short wave trough moves northeast into ontario. As a result,
all of forcing occurs below 800 mb. As a result, there is concern
that the rain chances may be too high. With limited instability,
lowered the chances of thunderstorms on Monday night. This was
especially the case over western wisconsin.

On Tuesday afternoon, the front will move quickly east across
western wisconsin. With 0-1 km mixed layer capes climbing up
250 j kg, there may be a few isolated storms. With little shear,
no severe weather is anticipated.

With the models in good agreement that the rain will be well east
of the area on Tuesday night. The small rain chances were removed
for this time period.

Thursday through Sunday...

the GFS and ECMWF are in good agreement that an alberta clipper will
pass through the region late Thursday into Friday. There are some
timing differences, though. The GFS is more progressive with the
upper-level shortwave, while the ECMWF develops a closed upper
low over michigan by Friday evening. The slower ECMWF would
prolong rain chances associated with this system through Friday.

The GFS and ECMWF remain in agreement on the evolution of the
synoptic pattern through the weekend, but the GFS continues to be
a slightly more progressive solution. The clipper system is
progged to be followed by brief ridging on Saturday and another
shortwave late Sunday. At the surface, canadian high pressure will
build in behind the departing clipper, making for pleasant days
and cool nights through the weekend.

Aviation (for the 18z tafs through 18z Monday afternoon)
issued at 1153 am cdt Sun sep 24 2017
vfr conditions expected through the period, with afternoon
cumulus and southerly winds around 10-12 kts. Could also see some
gusts up to 20 kts at rst. A broken 10 kft ceiling will move into
both sites by the end of the period as a cold front approaches.

Some showers will be present along the front and could impact rst
toward the end of the period, but timing and coverage differences
in guidance do not provide enough confidence to include a mention
at this time.

Climate Sunday record highs
issued at 310 pm cdt Sun sep 24 2017
at 1:53 pm, rochester international airport climbed to 88f. This
tied the record high for this date set back in 1886 and 1937.

At 2:03 pm, the temperature at la crosse regional airport climbed
to 93f. This is a new record for the date. The previous record was
92f in 1891. This was the third consecutive day in which a record
high has been set in la crosse. All 3 records were back in 1891.

It was only the 7th time in la crosse that we have had 3
consecutive days with highs of 93f or higher after august 31st.

This is the latest in a calendar year that this has occurred. The
other years were 1922 (sep. 5-7), 1937 (sep 1-3), 1939 (sep
13-15), 1955 (sep 16-18), and 1978 (sep 6-11 - 6 days).

Arx watches warnings advisories
Wi... None.

Mn... None.

Ia... None.

Short term... Ca
long term... Boyne mh
aviation... Ca
climate... Boyne


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Boscobel, Boscobel Airport, WI2 mi68 minSSE 510.00 miFair90°F61°F38%1013.6 hPa
Prairie Du Chien Municipal Airport, WI24 mi66 minSE 610.00 miFair88°F57°F35%1013.5 hPa

Wind History from OVS (wind in knots)
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmS7
G14
S6
G16
S8
G15
S6S6S5S4
1 day agoS3S5S5S6S34W3CalmCalmS3CalmCalmCalmCalmCalmCalmCalmW446S10
G17
S86S7
2 days ago6S653CalmCalmCalmCalmCalmCalmSW3S4S5S3S6S6S10SW11
G18
S11
G19
S10
G18
S7
G16
S9
G15
S9
G16
5

Tide / Current Tables for
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help
Tide / Current Tables for
   EDIT      (on/off)   Help
Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Midwest    EDIT
Geos

Wind Forecast for La Crosse, WI (19,4,5,8)
      (on/off)   Help

Ground Weather Radar Station La Crosse, WI
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.