Marine Weather and Tides
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 5:22AM||Sunset 8:29PM||Thursday May 23, 2019 5:45 PM CDT (22:45 UTC)||Moonrise 11:54PM||Moonset 8:29AM||Illumination 76%|
7 Day Forecast for Marine Location Near Necedah, WIHourly EDIT Help
Area Discussion for - La Crosse, WI  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus63 karx 232034|
area forecast discussion
national weather service la crosse wi
334 pm cdt Thu may 23 2019
Short term (this evening through Friday)
issued at 332 pm cdt Thu may 23 2019
low pressure continues to pull farther away into eastern canada this
afternoon as high pressure establishes itself over the northern
plains and steadily builds into the upper midwest. Looking aloft,
high pressure remains anchored over the southeast with ridging
extending northwest into the northern plains. Gulf moisture
continues to pool in the southern plains and lower mississippi
valley, south of a front stretching from the texas panhandle to the
eastern great lakes. Low pressure developing over the rockies will
eject from wyoming tonight, passing through the dakotas on Friday.
This system and an associated strengthening low level jet will
gradually pull the aforementioned boundary farther northward over
the next 24 hours.
Extensive stratocumulus deck over the northern 2 3 of our forecast
area today will begin to scatter out late this afternoon into the
evening under the influence of the building ridge. Already seeing
this trend begin across the far southern portion of the forecast
area. This gradient in cloud cover has resulted in quite a north-
south afternoon temperature spread across the area, with mid-50s in
taylor county to near 70 in grant county. Somewhat gusty westerly
winds are diminishing as the pressure gradient relaxes overhead.
For tonight, do not expect the clearing trend to last long as mid
level clouds increase out ahead of the next approaching system.
Increasing isentropic lift will spread in from the southwest after
midnight as a weakening low level jet tilts toward the upper
mississippi valley. This is expected to bring a weakening cluster of
showers and perhaps a few thunderstorms to the area late tonight
towards daybreak Friday, but the diminishing forcing as it
approaches our area makes it difficult to pin down its evolution.
Some models have been hinting at the possibility of the activity
splitting around the forecast area, with the northern portion tied
to the parent upper low as it moves through the dakotas... While the
southern portion skirts by our southern counties on the nose of the
llj. Other models bring the activity straight into our forecast
area. For now will continue with 60 to 80% pops for most of the
area, but the evening shift will have to monitor trends. Lows
tonight in the mid 50s south to mid 40s far north.
Upper ridging breaks down overhead on Friday, but weak disturbances
may support some additional convective activity through the day.
Approaching front and increasing moisture transport will support a
more focused potential for convective development across our south
in the late afternoon. Mlcapes of 1000-2000 j kg and some decent 0-
6km shear could support some better organized storms, an idea
supported by href painting some spotty updraft helicity across our
south. Something to monitor...
Long term (Friday night through Thursday)
issued at 332 pm cdt Thu may 23 2019
on Friday night, a shortwave trough will move east northeast
through the mid mississippi river valley. Precipitable water
values will climb into the 1.6 to 1.8 inch range. The best 850 mb
moisture transport looks to be focused into eastern iowa, southern
wisconsin, and northern illinois on Friday evening... And then it
moves east toward the southern great lakes and ohio river valley.
With most unstable capes up to 1500 j kg south of interstate 90
and 0-3 km and 0-6 km shear up to 40 knots, there may be a damaging
wind threat during the early evening across northeast iowa and|
southwest wisconsin. This then transitions to heavy rain threat
for the remainder of the evening. Rainfall amounts will range from
a half to 2 inches.
On Saturday night, another shortwave trough will transition
through the mid mississippi river valley. Most of the models have
its heaviest precipitation further southeast than the one on
For memorial day, yet another shortwave trough will be moving
through the region. This one looks to be further northwest than
the one on Saturday night. Most unstable capes will likely climb
up to 1250 j kg. With 0-3km shear in the 30-40 knots, expect any
storm development to be linear in nature. The damaging wind threat
looks to be marginal. However, with precipitable water values in
the 1.6 to 1.8 inch range, there may be a threat for flash
On Tuesday, another shortwave though will move the region. This
one will impact mainly northeast iowa and southwest wisconsin.
Like the one on memorial day, this looks to be a heavy rain
Aviation (for the 18z tafs through 18z Friday afternoon)
issued at 1251 pm cdt Thu may 23 2019
broken to overcast stratocu deck lingers over the area, but
remaining MVFR ceilings will soon climb back toVFR as daytime
mixing intensifies. A ridge of high pressure building into the
area later this afternoon will scour out some of the cloud cover
for a time until the next system arrives overnight. Models are
split on how widespread the shower storm activity will be across
our area as this system approaches, but any rain is expected to
hold off at both TAF sites until after 06z. Deeper low level
moisture will arrive towards daybreak Friday, leading to a period
of MVFR to perhaps ifr ceilings through at least Friday morning.
Breezy westerly winds early this afternoon will gradually diminish
and turn NW before becoming light and variable this evening.
Winds then become a tad gusty out of the SE Friday morning.
Hydrology Friday night through Tuesday
issued at 332 pm cdt Thu may 23 2019
periods of showers and thunderstorms are expected through the
Tuesday with the potential for additional flooding concerns.
Precipitable water values of 1.6 to 1.8 inches and warm cloud
depth of 3.5 km, possibly a little higher, will set the stage for
efficient rain production with any thunderstorm activity during
this time period.
Those planning on being near any waterways or have interests
along them should be prepared for rising water levels and possibly
flooding, especially if thunderstorms develop. Monitor the
weather closely this weekend, especially those camping in low
Arx watches warnings advisories
Short term... Kurz
long term... Boyne
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Volk / Camp Douglas, WI||11 mi||1.8 hrs||W 16 G 21||10.00 mi||Mostly Cloudy||64°F||48°F||56%||1018.3 hPa|
Wind History from VOK (wind in knots)
|1 day ago||E||E||E|
|2 days ago||NW||E||Calm||Calm||Calm||Calm||SE||E||E||E||E||SE||E||Calm||E||E||E||E||E|
EDIT Weekend mode (on/off) (on/off)  Help
EDIT (on/off)  Help
Weather Map and Satellite Images(on/off)  HelpWeather Map
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 (18,4,5,8)(on/off)  Help
Ad by Google
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.