Sunday, April18, 2021
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Marine Weather and Tides
Marinette, WI

Version 3.4
NOTICE
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 6:00AMSunset 7:42PM Sunday April 18, 2021 2:54 PM CDT (19:54 UTC) Moonrise 9:52AMMoonset 1:21AM Illumination 43% Phase: First Quarter Moon; Moon at 7 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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LMZ521 Green Bay South Of Line From Cedar River To Rock Island Passage And North Of A Line From Oconto Wi To Little Sturgeon Bay Wi- Green Bay South Of Line From Oconto Wi To Little Sturgeon Bay Wi- 1008 Am Cdt Sun Apr 18 2021
This afternoon..S wind 10 to 15 kts. Waves 2 ft or less. Mostly Sunny.
Tonight..S wind 10 to 15 kts veering nw and gusting to around 20 kts overnight. Waves 1 to 3 ft. A chance of showers after midnight.
Monday..NW wind 10 to 20 kts. Waves 1 to 3 ft. Mostly cloudy.
Monday night..NW wind 10 to 15 kts. Waves 1 to 3 ft. Partly cloudy.
LMZ521 Expires:202104182215;;745619 FZUS53 KGRB 181508 NSHGRB Nearshore Marine Forecast National Weather Service Green Bay WI 1008 AM CDT Sun Apr 18 2021 For waters within five nautical miles of shore on Lake Michigan LMZ521-522-182215-


7 Day Forecast for Marine Location Near Marinette, WI
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location: 45.09, -87.58     debug


Area Discussion for - Green Bay, WI
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FXUS63 KGRB 181929 AFDGRB

Area Forecast Discussion National Weather Service Green Bay WI 229 PM CDT Sun Apr 18 2021

Forecast discussion for routine afternoon forecast issuance

SHORT TERM. Tonight and Monday Issued at 228 PM CDT Sun Apr 18 2021

Clearing skies from earlier this morning allowed us to reach convective temperatures and produce a fairly widespread cumulus field across northeast Wisconsin. The cumulus will fade again this evening as temperatures start to fall back into the 50s, before widespread upper clouds move into the region ahead of a cold front.

Mid-level and low clouds then arrive this evening from the west, as a cold front rolls through the region. There will be just enough moisture to produce a band of showers for the region, but moisture will bottom out fairly quickly overnight as the front cross into far eastern Wisconsin. As a result, far north-central might pick up a couple tenths of precipitation but areas near the Fox Valley and lakeshore might only see a lighter sprinkle. The onset of precipitation will likely be rain, but there is a chance for some very brief freezing drizzle across the far north as ice becomes scarce aloft and surface temperatures dip below freezing. Given that daytime temperatures were in the 60s with sunshine today and lows tonight remain in the upper 20s and lower 30s, don't expect much impact. Kept the previous shifts forecast change to minimal to no snow accumulation, as qpf will be lacking by the time the air column gets cold enough, and ice will no longer be around to get the process started aloft. Winds from the northwest then increase behind the front into tomorrow morning for a breezy start to Monday.

Monday, the last of any shower potential will move out early in the morning, leading to a mostly dry but cloudy day. Ongoing CAA behind the cold front will bring a significantly cooler conditions for Monday than what we had for the weekend, especially with wind gusts in the area remaining in the 20 to 25 mph range. High temperatures for the day will be in the middle 30s to middle 40s, around 15 to 20 degrees cooler than what we had for this afternoon (Sunday).

LONG TERM. Monday Night Through Sunday Issued at 228 PM CDT Sun Apr 18 2021

Cloudy and cool weather through mid week before trending above normal for the end of the workweek into the weekend.

Monday night through Wednesday: Another low pressure system is expected to develop across the mid-Mississippi Valley late Monday night into Tuesday morning before quickly lifting to near Ohio Tuesday night. At the same time, the aforementioned upper-level trough is expected to remain in place across the area. The trough axis will linger nearby through Wednesday afternoon, which will keep the cloud cover in place across the area. This will result in below normal temperatures across northeast Wisconsin, with the main area of precipitation expected to remain to the south of the CWA. The main impacts from this feature will be the aforementioned increase in cloud cover and the cooler temperatures. It is possible that a few sprinkles or flurries could brush through east-central and far northeast Wisconsin Tuesday afternoon and again Wednesday afternoon, but chances appear to be fairly low. Soundings look to be very dry in the lower levels of the atmosphere, so the area may end up dry with some virga. Highs are expected to be in the upper 30s to the mid 40s. Overnight lows are expected to be mainly in the 20s.

Rest of the extended: After the low pressure system departs well to the east of the area on Wednesday, the upper-level trough axis is expected to progress eastward as well. This will set the stage for increasing height and more of a ridging pattern for the end of the workweek. This will allow for mainly dry conditions for Thursday and most of the day Friday. A cold front/low pressure system and perhaps more unsettled weather may approach late Friday into Saturday; however, there are some timing differences with these features. At this point, will stick with the consensus of the models, bringing increasing chances of showers for late Friday and Saturday. Temperatures are expected to warm to near or above normal for the rest of the period.

AVIATION. for 18Z TAF Issuance Issued at 102 PM CDT Sun Apr 18 2021

Good flying conditions are expected to persist through the afternoon hours. As we get into the evening, a cold front will bring in some low clouds and precipitation from the west, crossing northeast Wisconsin through the early overnight. MVFR cigs are likely as the rain crosses the region, with some improvement in CIGS afterwards, before the TAF period ends. There is a small chance that IFR conditions could also move into the region as the showers cross, but kept them out of this TAF issuance as confidence was low.

GRB WATCHES/WARNINGS/ADVISORIES. NONE.

SHORT TERM . Uhlmann LONG TERM . Cooley AVIATION . Uhlmann


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MN4 - 9087088 - Menominee, MI 1 mi55 min SE 11 G 12 46°F 50°F1009.4 hPa (-3.1)36°F
CBRW3 - Chambers Island, WI 14 mi75 min SSE 7 G 14 51°F
NPDW3 - Northport Pier at Death's Door WI 35 mi75 min SE 9.9 G 16 45°F 1012.2 hPa
KWNW3 - 9087069- Kewaunee, WI 43 mi55 min SSE 11 G 13 42°F 1011.3 hPa (-1.7)
GBWW3 44 mi55 min SSW 1 G 4.1 59°F 1009.5 hPa (-2.3)

Wind History for Menominee, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Menominee - Marinette Twin County Airport, MI3 mi59 minS 12 G 1710.00 miFair57°F29°F34%1010.5 hPa
Door County Cherryland Airport, WI21 mi59 minSSE 1210.00 miFair51°F26°F38%1011.5 hPa

Link to 5 minute data for KMNM

Wind History from MNM (wind in knots)
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Last 24hrSE9SE9E8E5E6CalmCalmE3CalmCalmCalmCalmCalmCalmCalmCalmCalmSW4S6SW6SW8S11S10S12
G17
1 day agoE6E10E8SE6E7SE4E6E6E4N3CalmNW3NW3NW3NW4NW4NW4NW7N5N83E9SE8SE10
2 days agoNW11
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N7N7N8N9E3CalmCalmN7N5NW3NW3N4N4N4N5N4--N8
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Tide / Current Tables for
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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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