Sunday, August9, 2020
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Marine Weather and Tides
Necedah, WI

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 5:54AMSunset 8:14PM Sunday August 9, 2020 2:38 AM CDT (07:38 UTC) Moonrise 10:16PMMoonset 10:49AM Illumination 72% Phase: Waning Gibbous; Moon at 20 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 Necedah, WI
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location: 43.93, -90.06     debug


Area Discussion for - La Crosse, WI
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FXUS63 KARX 090340 AFDARX

Area Forecast Discussion National Weather Service La Crosse WI 1040 PM CDT Sat Aug 8 2020

SHORT TERM. (This evening through Sunday) Issued at 325 PM CDT Sat Aug 8 2020

Forecast concerns through Sunday will be lingering storms toward Juneau and Adams counties this afternoon and how the thunderstorms in west central MN move east . then evolution of storms over the Central Plains later today and tonight and into our area late Sunday morning and afternoon along with the severe weather potential.

The 500mb trough over the Upper Peninsula of Michigan indeed produced a convective complex across northern Minnesota that dropped southeast into Wisconsin through 12Z. The bulk of the activity was northeast of the forecast area, however the Medford AWOS did pick up 0.46". Some trailing shortwave energy combined with convergence along a boundary that was over southern MN toward Jackson Co. WI produced some agitated cumulus a little before 9am Over time. scattered thunderstorms formed in west to east fashion where moisture was pooled. Coverage was limited to the southwest where the forcing was weaker and the cap stronger. Storms were mostly sub- severe with small hail and lightning, however we did have isolated storms that produced nickel-sized hail near Warrens in Monroe county.

The latest water vapor satellite imagery shows the cluster of storms in southwest and north central Minnesota with some new development closer to the surface front in eastern South Dakota.

The CAMs and operational models had a tough time with the convection this morning with a wide variety of solutions. Looking at the CAMs for the rest of this afternoon into this evening . they are mostly dry with a few peppering cells across the northern central part of the forecast area and others developing storms across parts of our northeast Iowa and Wisconsin Co. with the subtle shortwave moving east. The cluster has been persistent since about 15Z near Carpenter SD and is traveling east at around 32kts. The subjective surface map and visible satellite showed a couple of potential boundaries and a possible gravity wave across southern Minnesota earlier today. Farther south into northeast Iowa and southwest Wisconsin, there may be another boundary. The shortwave is moving into a very unstable environment and steep lapse rates of 8.5 to 9 deg C. in place. 700mb moisture appears pool through around 22Z toward our forecast area then is forecast to decrease farther east. Not confident the models have this correct and will continue with chance pops with the shortwave between now and 01Z. Unsure if additional storms can develop after 01Z but will maintain isolated mention in the vicinity of the wave. SPC has the higher risk for severe storms just west of our area, however should storms maintain themselves, they could produce damaging winds and large hail. The precipitable water environment is high as well . thus any storms will be capable of putting down locally heavy rains. The area is in need of rainfall and the wave progressive. The marginal areas for excessive rainfall today and Sunday just clip our northern counties north of I90.

A shortwave trough in Western High Plains will move into Minnesota overnight gradually pushing into the forecast area later Sunday morning into Sunday afternoon. The stronger frontogenesis remains west of our area tonight and north of our area during the day Sunday. Do increase pops late Sunday morning into Sunday afternoon with the pre-frontal trough. Forecast soundings show a continued moderate to high instability around 4000J/kg with very steep lapse rates. Hodographs do have some sfc -3km SRH of 150-200m2/s2, thus all hazards would be possible. The slight risk from SPC was expanded to cover the entire forecast area.

LONG TERM. (Sunday night through Saturday) Issued at 325 PM CDT Sat Aug 8 2020

Showers and storms look to linger into Sunday evening-night, with a few strong to severe possible. A cold front will slide through the local area late Sunday night, with surface high pressure building in it's wake. The front will act to bring more comfortable weather to the area to start the new work week as lower dewpoints filter in. Some remnant showers may persist on Monday mainly across areas to the south as the front exits east. Pretty quiet with seasonable temperatures through Tuesday, but occasional chances for showers and storms return midweek onward as a few shortwave troughs move through the area.

AVIATION. (For the 06Z TAFS through 06Z Sunday night) Issued at 1034 PM CDT Sat Aug 8 2020

Storms have moved out of the area, and while I cannot rule out a stray shower overnight, we are in a lull for now as the lower atmosphere has temporarily stabilized. More rounds of storms are expected Sunday as the main forcing moves into the region. In the meantime, could see some MVFR fog at TAF sites overnight.

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

SHORT TERM . Zapotocny LONG TERM . NB AVIATION . DMD


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Volk / Camp Douglas, WI11 mi42 minS 410.00 miFair72°F72°F100%1015.6 hPa

Link to 5 minute data for KVOK

Wind History from VOK (wind in knots)
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Last 24hrS7SE5S5S10S9S8SW4SW5S4N11
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1 day agoCalmCalmE3E4SE4SE3SE5SE7S10
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Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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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 (3,6,7,8)
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Ground Weather Radar Station La Crosse, WI
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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 numerous 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.