Friday, April16, 2021
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Marine Weather and Tides
Athens, WI

Version 3.4
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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 6:09AMSunset 7:46PM Friday April 16, 2021 3:54 AM CDT (08:54 UTC) Moonrise 7:37AMMoonset 11:35PM 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
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7 Day Forecast for Marine Location Near Athens, WI
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location: 45.09, -90.06     debug


Area Discussion for - Green Bay, WI
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FXUS63 KGRB 160825 AFDGRB

Area Forecast Discussion National Weather Service Green Bay WI 325 AM CDT Fri Apr 16 2021

Forecast discussion for routine morning forecast issuance

SHORT TERM. Today . Tonight . and Saturday Issued at 324 AM CDT Fri Apr 16 2021

The forecast area will remain on the eastern periphery of a large Canadian high pressure system through Saturday, with dry conditions and slightly milder temperatures expected.

Low clouds will make a push into northeast WI this morning, but should erode by early afternoon due to daytime heating/mixing. Mixing through 850-800 mb should yield high temperatures in the 50s, though developing northeast to east winds will keep readings near the lakeshore in the 40s.

Mostly clear skies and light winds will allow temperatures to drop quickly tonight. Low temperatures will range from the lower to middle 20s in the Northwoods to the upper 20s and lower 30s elsewhere.

Partly cloudy skies will prevail on Saturday, with deep mixing to 800-750 mb supporting high temperatures in the 50s inland. Once again, northeast to east winds will keep lakeshore temperatures considerably cooler, with highs in the middle to upper 40s.

LONG TERM. Saturday Night Through Thursday Issued at 324 AM CDT Fri Apr 16 2021

Dry conditions to start, then an unsettled pattern for early in the week with another system for the end of the week as the pattern turns more progressive across the CONUS. That said, no major spring systems on the horizon with relatively light precip expected. Temps will start off near or slightly above normal, then drop back below normal for the early and middle part of next week, then moderate to near normal at the end of the week.

Saturday night into Sunday . quiet weather is expected as a shortwave passes well south of the region. Weak northwest flow and weak troughing over the western Great Lakes region, along with some moisture in the mid and upper levels, will provide for some clouds at times, but it looks to remain dry. It will be another chilly night with lows mainly in the 20s across northern WI and in the 30s farther south and near Lake Michigan. West winds at the surface will provide for a little WAA through the day, with temps climbing to near or slightly above normal for most locations as highs in the middle 50s to lower 60s are expected, slightly cooler near Lake Michigan.

Sunday night into Monday night . an upper jet and upper trough will swing into the western Great Lakes through the period. A cold front will swing across the area Sunday night. The strongest FGEN, best moisture and upper support still looks to push through in the early morning hours of Monday through around midday, however some differences remain in the models. This is when the most concentrated rain/snow activity is expected. Thermal profiles showing mainly rain to start, then as colder temps move in behind the front, a transition to snow or a rain/snow mix over the north is expected. Amounts will be on the light side, but some snow accumulations up to an inch will be possible. While surface temps will stay above freezing farther south, some snow is expected to at least mix in as the boundary layer cools behind the front. The rain/snow mix will likely have to be expanded southward if the trends continue. Lingering rain and a few snow showers are possible Monday afternoon and evening due to lingering moisture and cyclonic flow. A strong push of CAA will allow 850mb temps to plummet to around -10C by Monday night. The model blend looked a little high for temps on Monday, especially with a faster moving front, as over north central WI, temps will struggle to get to the 40 degree mark, with temps mainly steady in the lower and middle 40s farther south/east. The CAA and colder air aloft will also aid in bringing some gusty northwest winds up to 30 mph in the late morning and afternoon.

Rest of the week . cyclonic flow, cold temps aloft, and another trough swinging across the region will bring another mostly cloudy and cool day on Tuesday. Models not overly aggressive with precip at this point, but imagine at least some isolated to scattered rain and snow showers will be around. Temps will be slow to climb with highs in the 30s to lower/mid 40s expected. Models showing the upper trough slowly exiting the area on Wednesday, but its influence could still bring clouds and maybe some showers to the area. Temps will be slow to moderate, but it should be a little warmer than Tuesday. Weak ridging and a return to a more westerly flow should bring dry conditions for Wednesday into Thursday with temps moderating to near or slightly above normal on Thursday. Another trough and cold front will bring a chance of precip back to the area late next week.

AVIATION. for 06Z TAF Issuance Issued at 1035 PM CDT Thu Apr 15 2021

Mostly clear skies are expected across most locations through the TAF period. Some passing VFR clouds may track over the western TAF sites early in the TAF period, with some lake clouds affecting the east-central Wisconsin TAF sites tonight into Friday morning with flow off the lake. Mostly clear skies are then expected on Friday as surface high pressure builds in from the Northern Plains states. Good flying weather looks likely Saturday and Sunday.

GRB WATCHES/WARNINGS/ADVISORIES. NONE.

SHORT TERM . Kieckbusch LONG TERM . Bersch AVIATION . Kurimski


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Taylor County Airport, WI13 mi60 minN 010.00 miFair30°F30°F100%1017.3 hPa
Merrill, Merrill Municipal Airport, WI20 mi60 minN 010.00 miFair30°F30°F100%1017.3 hPa

Link to 5 minute data for KMDZ

Wind History from MDZ (wind in knots)
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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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