Tuesday, May11, 2021
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Marine Weather and Tides
Sebewaing, MI

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 6:12AMSunset 8:51PM Tuesday May 11, 2021 7:41 AM EDT (11:41 UTC) Moonrise 5:20AMMoonset 7:52PM Illumination 0% Phase: New Moon; Moon at 29 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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LHZ422 Inner Saginaw Bay Sw Of Point Au Gres To Bay Port Mi- 337 Am Edt Tue May 11 2021
Today..Northwest winds 10 to 15 knots increasing to 15 to 20 knots early in the afternoon, then diminishing to 10 to 15 knots late in the afternoon. Mostly Sunny with a slight chance of showers in the morning, then mostly cloudy with a chance of showers in the afternoon. Waves 1 to 3 feet.
Tonight..Northwest winds 10 to 15 knots diminishing to 5 to 10 knots after midnight. Mostly clear. A chance of showers in the evening. Waves 2 feet or less.
Wednesday..Northwest winds 10 to 15 knots diminishing to 5 to 10 knots in the late morning and early afternoon, then veering to the southeast early in the afternoon. Sunny. Waves 2 feet or less.
Wednesday night..Light and variable winds becoming northwest 5 to 10 knots in the late evening and early morning, then becoming light and variable after midnight. Clear. Waves 2 feet or less. SEe lake huron open lake forecast for days 3 through 5.
LHZ422 Expires:202105111515;;934360 FZUS53 KDTX 110737 NSHDTX Nearshore Marine Forecast for Michigan National Weather Service Detroit/Pontiac MI 337 AM EDT Tue May 11 2021 For waters within five nautical miles of shore Waves are the significant wave height - the average of the highest 1/3 of the wave spectrum. Occasional wave height is the average of the highest 1/10 of the wave spectrum. LHZ422-111515-


7 Day Forecast for Marine Location Near Sebewaing, MI
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location: 43.76, -83.68     debug


Area Discussion for - Gaylord, MI
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FXUS63 KAPX 111009 AFDAPX

Area Forecast Discussion National Weather Service Gaylord MI 609 AM EDT Tue May 11 2021

NEAR TERM. (Today through Tonight) Issued at 344 AM EDT Tue May 11 2021

. Cool stretch of weather almost done .

High Impact Weather Potential: Freeze concerns again tonight.

Pattern Synopsis/Forecast: Split flow and a weakening block pattern remains across western NOAM, with stronger quasi-westerly flow stretching from the SW CONUS to off the east coast. Our pesky closed upper trough axis on the eastern flank of the block has/is becoming elongated and sagging down into northern Michigan along with the core of coldest air aloft (-6C/-34C H8/H5 temps respectively). Band of modest QG-forcing for ascent, thicker cloud cover and some shower activity along and north of the trough axis is also in the process of dropping down into northern Michigan.

Elongating upper trough axis and core of coldest air aloft expected to finally drop southward through the Great Lakes during the course of the day as upstream sharp ridge axis and sfc high pressure begins to build into the Midwest and eventually into the western Great Lakes through tonight.

Details: Band of thicker cloud cover and some light precip will be dropping down through the eastern U.P. early this morning and eventually down through northern Lower Michigan through today . bolstered somewhat by cold air aloft/steeper lower level lapse rates and daytime heating. Precip may be a little mixy this morning, especially across eastern Upper Michigan, before sfc temps warm rather quickly after sunrise. But sfc high pressure and drier air will be building into the region through the afternoon which should bring a diminishing trend to cloud cover and shower chances as we get later in the day.

Upper level ridging, sfc high pressure/drier air continue to build into the region in earnest tonight with clearing skies anticipated. A good radiational cooling night, except we do keep a decent pressure gradient/gradient wind going through a good part of the night. Nonetheless, temperatures will likely dip at or below freezing at many locations . and potentially the middle 20s for our usual cold locations and areas that can decouple. Another round of freeze warnings will likely be needed once again.

SHORT TERM. (Wednesday through Thursday) Issued at 344 AM EDT Tue May 11 2021

High impact weather potential: One more night of frost/freeze concerns Wednesday night.

Pattern synopsis/forecast: Troughing that's plagued the region this past weekend and through the early portion of the week is expected to have shifted across the Northeast states by Wednesday as upper- level ridging slides across the Upper Mississippi Valley into the western Great Lakes through the forecast period. Attendant high pressure will accompany this feature, largely keeping northern Michigan's sensible weather dry with moderating temperatures.

Primary forecast concerns/challenges: Wednesday night's low temperatures.

Surface high pressure gradually presses into the region late Tuesday night . becoming centered overhead during the day Wednesday. After a cold start to the day Wednesday, little in the way of sensible weather is anticipated across northern Michigan as mostly sunny skies are expected to be the rule. Moderating temperatures arrive as well with highs climbing 10 or so degrees above Tuesday's highs . ranging from the upper 50s to low 60s for most -- cooler at the lakeshores.

One more chilly night is on tap Wednesday night, although not quite as cold as the previous several given weak/subtle warm air advection underway. Expecting the coolest readings to be found across interior northern lower/eastern upper . generally ranging from the low-mid 30s. Several degrees warmer across the Great Lakes coastal collar counties. Certainly another night to take precautions to protect any sensitive vegetation, especially for inland locations.

Another tranquil day anticipated Thursday with more sun than clouds and temperatures climbing back to near-normal . perhaps even a couple of degrees above normal as highs range from the low-mid 60s for most -- again cooler near the lakes.

LONG TERM. (Thursday night through Monday) Issued at 344 AM EDT Tue May 11 2021

High impact weather potential: Minimal for now.

Upper-level ridging will continue to trek over the Great Lakes becoming centered over New England during the day Thursday as high pressure sits over the region to wrap up the work week. Mainly precipitation-free conditions continue through the end of the week before some low-end rain chances enter the picture for the weekend; however, a lack of substantial forcing will limit meaningful precip. Temperatures certainly look to remain more spring-like through the forecast period . generally ranging from the mid-upper 60s for most.

AVIATION. (For the 12Z TAFS through 12Z Wednesday morning) Issued at 609 AM EDT Tue May 11 2021

Sharp upper level low is in the process of sliding down through northern Michigan dragging core of coldest air down into the region. In response, lower (MVFR) cloud cover is in the process of expanding into northern Lower Michigan early this morning, and there may be some light precip that develops across the area this morning and into the afternoon.

High pressure and drier air will build into the region later this afternoon and through tonight. This will bring a clearing trend to northern Lower Michigan this afternoon with VFR conditions returning to the terminal sites. Overall clear skies anticipated tonight.

Northwest wind gustiness expected today. Winds diminish tonight and remain on the lighter side through Wednesday.

MARINE. Issued at 344 AM EDT Tue May 11 2021

Gusty northwest winds will result in small craft advisory conditions on Whitefish Bay/Saint Marys River and parts of northern Lake Huron . today through this evening. High pressure builds into the region tonight bringing diminishing winds later tonight and for the next few days.

APX WATCHES/WARNINGS/ADVISORIES. MI . FREEZE WARNING until 8 AM EDT this morning for MIZ016>018- 020>036-041-042-098-099. LH . SMALL CRAFT ADVISORY until midnight EDT tonight for LHZ347-348. LM . NONE. LS . SMALL CRAFT ADVISORY until midnight EDT tonight for LSZ321-322.

NEAR TERM . BA SHORT TERM . MG LONG TERM . MG AVIATION . BA MARINE . BA


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SBLM4 - Saginaw Bay Light #1, MI 4 mi42 min NW 14 G 19 38°F 1021.7 hPa (+1.4)
GSLM4 - Gravelly Shoals Light MI 19 mi62 min W 16 G 17 36°F 1022 hPa
TAWM4 - Tawas City, MI 36 mi62 min WNW 7 G 13 35°F 1022 hPa

Wind History for Harbor Beach, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Caro, Tuscola Area Airport, MI24 mi47 minW 510.00 miFair33°F27°F77%1022.3 hPa

Link to 5 minute data for KCFS

Wind History from CFS (wind in knots)
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Last 24hrNW4NW8NW6W9
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W5NW11NW7W7NW6NW7NW3NW6NW3CalmNW9NW10NW7NW6NW5W3W3W4W4W5
1 day agoCalmE4SE4NE5CalmCalmNE3NE3N3NE3N3N5N3CalmN3CalmCalmCalmCalmCalmCalmCalmCalmW3
2 days agoNW8NW7NW9NW7NW6NW9
G22
N8NW7W4NW5W4SW6CalmCalmE4SE3CalmS3CalmCalmCalmCalmCalmCalm

Tide / Current Tables for
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Weather Map
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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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