Thursday, May13, 2021
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Marine Weather and Tides
Sister Bay, 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 5:24AMSunset 8:12PM Thursday May 13, 2021 7:02 AM CDT (12:02 UTC) Moonrise 6:25AMMoonset 10:16PM Illumination 4% Phase: Waxing Crescent; Moon at 2 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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LMZ541 Expires:202105131645;;040123 Fzus53 Kgrb 130831 Nshgrb Nearshore Marine Forecast National Weather Service Green Bay Wi 331 Am Cdt Thu May 13 2021 For Waters Within Five Nautical Miles Of Shore On Lake Michigan Lmz521-522-541>543-131645- 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- Rock Island Passage To Sturgeon Bay Wi- Sturgeon Bay To Two Rivers Wi-two Rivers To Sheboygan Wi- 331 Am Cdt Thu May 13 2021
Today..S wind 10 to 15 kts. Waves 2 ft or less. Sunny.
Tonight..SW wind 5 to 10 kts. Waves 2 ft or less. Mostly clear.
Friday..S wind 10 to 15 kts. Waves 2 ft or less. Mostly Sunny.
Friday night..SW wind 10 to 15 kts. Waves building to 1 to 3 ft. Mostly clear.
LMZ541


7 Day Forecast for Marine Location Near Sister Bay, WI
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location: 45.19, -87.12     debug


Area Discussion for - Green Bay, WI
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FXUS63 KGRB 131059 AFDGRB

Area Forecast Discussion National Weather Service Green Bay WI 559 AM CDT Thu May 13 2021

Updated aviation portion for 12Z TAF issuance

SHORT TERM. Today . Tonight . and Friday Issued at 312 AM CDT Thu May 13 2021

Fairly quiet weather expected through the short-term portion of the forecast with near to slightly above normal temperatures.

Today through Friday: Northeast Wisconsin's weather will remain under the influence of high pressure through much of this time period. The surface ridge will drift slowly to the east this afternoon through the day Friday; however, the area will still remain on the western fringes by Friday afternoon. This will keep conditions fairly quiet with a steadily increasing south to southwest wind along with a slow increase in overall moisture. Aloft, an upper-level ridge axis will remain overhead today before a shortwave trough approaches from the west on Friday. The main impact these features will have on the area, will be increasing temperatures near the ridge axis and a steady increase in diurnal cloud cover. Low-level moisture will be lacking through this entire time period, so not expecting an precipitation.

Elevated fire danger expected to continue across the Northwoods and in locations that have not had spring green-up. Afternoon RH values will likely drop off again, especially in the sand soil locations. Those locations may see RH values in the 20-25 percent range; however, it is not completely out of the question to have some mid to upper teens during peak mixing this afternoon. Some improvement expected for Friday, but still looking at RH values dropping into the 25 to 30 percent range. High temperatures are expected to be in the mid to upper 60s to around 70 each day. Overnight lows will moderate with most locations staying in the upper 30s to low 40s.

LONG TERM. Friday Night Through Wednesday Issued at 312 AM CDT Thu May 13 2021

The extended forecast will shift over to a more active pattern this weekend. A weakening midlevel shortwave will bring isolated showers into the region Friday night into Saturday, mainly for central Wisconsin. Showers then become possible over the rest of the area during the day Saturday, as diurnal heating helps out the fairly meager forcing from the shortwave. Moisture during this period will be fairly lacking, so when all is said and done, most areas will likely be dry, but a few will see some brief showers Friday night into Saturday. Sunday will then be fairly similar, with another mid level shortwave bringing in some isolated to scattered showers during the afternoon and evening. Rain coverage may be a little greater on Sunday than on Saturday, due southerly flow bringing in slightly warmer temperatures and additional moisture. That said, we're still far from developing any significant convection and overall upper support will remain weak, so while a few more areas will see rain, impacts will likely be minimal.

We then switch over to a more dry forecast for early next week, as high pressure establishes itself for Tuesday and Wednesday across the area. Southerly flow will likely continue at the surface during this period however, pushing our daytime high temperatures into the lower to middle 70s. By the end of the work week the dry conditions could come to an end again however, as another system approaches from the south. There is still plenty of uncertainty as to how far north this warm front gets, which will largely dictate how much precipitation we get in our area.

AVIATION. for 12Z TAF Issuance Issued at 559 AM CDT Thu May 13 2021

VFR flying conditions expected through this TAF issuance. Diurnal CU will likely develop each afternoon. Otherwise, a broken to overcast cloud deck may briefly pass through the RHI TAF site later this afternoon into this evening. Winds will remain fairly light through this issuance.

GRB WATCHES/WARNINGS/ADVISORIES. Frost Advisory until 8 AM CDT this morning for WIZ005-010>013- 018>021-030-031-035>037-045-073-074.

SHORT TERM . Cooley LONG TERM . Uhlmann AVIATION . Cooley


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NPDW3 - Northport Pier at Death's Door WI 10 mi22 min SSE 1.9 G 4.1 50°F 1029.1 hPa
CBRW3 - Chambers Island, WI 13 mi22 min SSE 2.9 G 7 50°F
MN4 - 9087088 - Menominee, MI 26 mi44 min SW 6 G 8 47°F 53°F1027 hPa33°F
FPTM4 - Fairport, MI 38 mi22 min E 1 G 1.9 43°F

Wind History for Menominee, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Menominee - Marinette Twin County Airport, MI27 mi66 minWSW 510.00 miFair45°F29°F54%1028.8 hPa

Link to 5 minute data for KMNM

Wind History from MNM (wind in knots)
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Last 24hrN3N3E3SE6SE9E10SE11SE12SE10S12S11S11S9S5SW4SW6SW3SW5SW5W3CalmCalmW5SW5
1 day agoN9N10N10N8
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N83SE7E7SE4CalmSW3SW5CalmCalmCalmCalmCalmCalmCalmCalm
2 days agoN8N9N10N7
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CalmE4NE3N3CalmCalmNW3CalmNW3N7NW4NW4NW4

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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