Marine Weather and Tides
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen
|Sunrise 7:15AM||Sunset 4:24PM||Sunday December 8, 2019 8:28 PM CST (02:28 UTC)||Moonrise 2:39PM||Moonset 3:22AM||Illumination 92%|
7 Day Forecast for Marine Location Near Spring Green, WIHourly EDIT Help
Area Discussion for - Milwaukee/Sullivan, WI  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS63 KMKX 082357 AFDMKX
Area Forecast Discussion National Weather Service Milwaukee/Sullivan WI 557 PM CST Sun Dec 8 2019
UPDATE. Increasing low level convergence along strengthening low level trof and increasing low level moisture should result in areas of light rain and drizzle developing overnight. Will need to keep a close eye on pavement and low level temperatures overnight. Partial clearing across the northern CWA has allowed temps to fall into the low to mid 30s early this evening. Temps may even fall a few more degrees before stabilizing and then increasing later in the night as the deeper low level moisture pushes across the area. Never the less, temperatures in the far north may remain around freezing, increasing the threat for a period of light freezing rain or drizzle that may affect the Monday morning commute. Expect low clouds and areas of fog to accompany the light rain and drizzle overnight.
AVIATION(00Z TAFS). Expect low IFR ceilings to spread across southern WI overnight along with areas of light rain and drizzle. Fog will accompany the light precipitation. The fog could become localized dense.
PREV DISCUSSION. (Issued 225 PM CST Sun Dec 8 2019)
SHORT TERM .
Tonight - Confidence . Medium A frontal boundary sagging southeast from northern WI will gradually weaken somewhat, however as low pressure approaches from the central Plains, there will be an increase in low level moist advection with a lingering 850 baroclinic zone. Would expect stratus/fog/drizzle to evolve later in the night. The meso models show this with very light precipitation developing in the southeast and then advancing north/northwest throughout the area. By and large it looks like the cloud cover streaming northeast should keep temps from falling off too much. The far northwest cwa would be most vulnerable to any freezing potential very late in the night and the confidence of this is too low to issue any advisory at this juncture.
Monday and Monday night - Confidence . Medium After the initial moisture surge there may be a lull in precip for a time before the mid level energy and cold front bring another round of precipitation. Low clouds/fog and perhaps some drizzle will linger with broad surface/850 low in the area. As colder air air works in there will be the potential for some mix and then a change to all snow. Accums still look on the light side with any amounts an inch or less and more towards the northern portion of the forecast area during the afternoon and early evening. Some drying in the dendritic growth zone may result in some patchy freezing drizzle at times. Precipitaion will shift quickly Monday evening with the cold advection on northwest winds becoming prevalent.
LONG TERM .
Tuesday through Thursday Night - Confidence . High A deep upper level trough will allow arctic air to impact the area Tuesday through Wednesday night. Highs will mainly be in the teens to low 20s with overnight lows in the single digits to near zero towards central Wisconsin. Wind chills during this time will single digits and teens during the day and below zero overnight. Dry air will be in place with sunny skies until a shortwave moves through northern Wisconsin Thursday. Some light snow will be possible Thursday afternoon towards central Wisconsin but better chances are farther north. Warmer temperatures are expected Thursday with highs in the upper 20s to low 30s and wind chills in the single digits to teens.
Friday through Sunday - Confidence . Medium The pattern becomes more active in the extended with signs for a few shortwave troughs moving through. There is some uncertainty with the track and timing of these waves that could bring some rain and snow to the area. Have some slight chances in for now. Highs are expected to be in the mid to upper 30s with cooler temperatures for Sunday as a cold front moves through.
AVIATION(21Z TAFS) . VFR conditions expected into early this evening. High level cloudiness continues to stream wsw-ene. Lower ceilings well to our northwest behind frontal boundary. Still expecting light rain or drizzle to develop across the area esp after 06z or so. Cigs/vsbys will be heading down as airmass continues to moisten up, so some LIFR conditions are quite plausible very late tonight into Monday. Precipitation will trend to a mix and some light snow Monday afternoon into the early evening as colder air wraps in behind a cold front with precip likely to wind down rather quickly. With the loss of ice crystals during this time some spotty freezing drizzle is possible as well.
MARINE . Pressure gradient slackening as trough approaches from central WI. Gale warning has expired and will let the small craft advisory do the same at 21z. Next focus will be the uptick in winds on Monday evening in the wake of the cold front. Northwest winds may gust high enough to warrant the need for a small craft advisory Monday night, but at this time it looks as if the open lake gusts would remain below gale criteria.
MKX WATCHES/WARNINGS/ADVISORIES. WI . None. LM . None.
Update . mbK Tonight/Monday and Aviation/Marine . mbK Monday Night through Sunday . RAR
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. Follow links for more data.
|Lone Rock Tri-County Regional Airport, WI||11 mi||33 min||ESE 4||5.00 mi||Fog/Mist||31°F||28°F||89%||1008.6 hPa|
|Iowa County Airport, WI||21 mi||34 min||SE 3||10.00 mi||Fair||36°F||32°F||87%||1007.8 hPa|
Link to 5 minute data for KLNR
Wind History from LNR (wind in knots)
|1 day ago||Calm||Calm||N||Calm||Calm||E||Calm||NE||Calm||SE||SW||Calm||S||SW||SW||S||S||S||S||S||S||S||S||S|
|2 days ago||Calm||W||NW||N|
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GEOS 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 Milwaukee/Sullivan, WI (21,6,7,8)(on/off)  Help
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