Thursday, April22, 2021
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Marine Weather and Tides
Greendale, 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 5:56AMSunset 7:44PM Thursday April 22, 2021 10:12 AM CDT (15:12 UTC) Moonrise 2:20PMMoonset 4:01AM Illumination 81% Phase: Waxing Gibbous; Moon at 11 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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LMZ645 North Point Light To Wind Point Wi- 906 Am Cdt Thu Apr 22 2021
Rest of today..West wind 5 to 10 knots backing southwest early in the afternoon, then becoming south 10 to 15 knots late in the afternoon. Sunny. Waves around 1 foot.
Tonight..Southwest wind 10 to 15 knots becoming southwest 10 to 15 knots with gusts to around 20 knots after midnight, then becoming southwest 10 to 15 knots early in the morning. Mostly clear. Waves 1 to 2 feet.
Friday..Southwest wind 10 to 15 knots backing south in the afternoon. Mostly cloudy. Waves 1 to 2 feet.
Friday night..South wind 10 to 15 knots easing to 5 to 10 knots in the late evening and early morning, then becoming southeast early in the morning. Slight chance of showers. Waves 1 to 2 feet.
LMZ645 Expires:202104222200;;947490 FZUS53 KMKX 221406 NSHMKX Nearshore Marine Forecast National Weather Service Milwaukee/Sullivan WI 906 AM CDT Thu Apr 22 2021 For waters within five nautical miles of shore on Lake Michigan LMZ645-222200-


7 Day Forecast for Marine Location Near Greendale, WI
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location: 42.95, -87.95     debug


Area Discussion for - Milwaukee/Sullivan, WI
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FXUS63 KMKX 221457 AFDMKX

Area Forecast Discussion National Weather Service Milwaukee/Sullivan WI 957 AM CDT Thu Apr 22 2021

UPDATE. (Issued 957 AM CDT Thu Apr 22 2021)

The forecast remains on track.

RAH

SHORT TERM. (Issued 312 AM CDT Thu Apr 22 2021)

Today through Friday:

A few patches of clouds will continue to work their way across western portions of the CWA this morning and cannot rule out a light flurry or two from it. However, any precip will have to overcome the very dry air, so most will likely evaporate before reaching the ground as is evident via the lack of reports in the latest surface obs under the cloud deck.

Otherwise, today will be mostly dry and warmer as surface high pressure skirts to our south and mid-level ridging develops across the Upper Midwest. Expect to see temps rise closer to normal with west to southwest winds. Looking at highs to top off in the 50s with a few locations cracking into the low 60s. Drier conditions will continue overnight with lows in the mid to upper 30s.

Meanwhile, a mid-level shortwave trough is progged to work its way across the Central Plains today and push into the Upper Midwest for Friday. This wave will bring a swath of vorticity along with a weakening band of 700 mb frontogenesis into WI Friday. The forcing combined with increased PWATs around half an inch is expected to be enough for increased shower activity. Looking like the scattered rain showers will be mostly light as the GEFS and EPS ensemble members are showing QPF to range from a few hundredths to maybe a tenth of an inch or two at most. Overall, nothing too exciting with this wave Friday.

Wagner

LONG TERM. (Issued 312 AM CDT Thu Apr 22 2021)

Friday night through Wednesday:

A weak upper trough will bring a slight chance of showers Friday night and Saturday. Any precipitation would be very light. Dry weather is expected Sunday as high pressure moves across the state.

Warmer temperatures are in store starting Monday with mid level ridging and southerly flow. A front will move through midweek bringing widespread rainfall. A deep midlevel trough combined with high pressure over the eastern U.S. will allow Gulf moisture and higher dew points to stream into southern Wisconsin. The front will push through later in the week bringing somewhat cooler temperatures. Lighter precipitation may linger into Thursday or Friday.

Marquardt

AVIATION. (Issued 957 AM CDT Thu Apr 22 2021)

Expect VFR conditions to continue as high pressures builds to our south. Winds will mainly be from the west to southwest west with gusts nearing 15-20 kt this afternoon. Clouds begin to move in with the next system that will bring chances for showers to southern WI Friday morning and into the afternoon. Ceilings may drop to MVFR values Friday morning and into the afternoon.

RAH

MARINE. (Issued 312 AM CDT Thu Apr 22 2021)

Light westerly winds are expected to increase and shift more southerly this afternoon as high pressure builds across the Ohio River Valley. Could see gusts in our nearshores approach 20 knots at times this afternoon, but will hold off on the Small Craft Advisory. Winds will likely stay elevated tonight, but will shift more southwesterly. South to southwesterly winds continue into Friday as the surface high skirts eastward. Northerly winds are then expected to develop into the weekend as a low passes to the south of Lake Michigan. Could see gusts up to around 30 knots across the open waters Saturday night.

Wagner

MKX WATCHES/WARNINGS/ADVISORIES. WI . None. LM . None.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MLWW3 - Milwaukee, WI 5 mi63 min W 7 G 9.9 40°F
45013 12 mi73 min W 9.7 G 9.7 39°F 41°F1019.2 hPa (+0.9)
KNSW3 - Kenosha, WI 26 mi73 min WNW 5.1 G 9.9 40°F 1019.6 hPa (+0.6)
PWAW3 - Port Washington, WI 31 mi93 min W 6 G 9.9 39°F 1020 hPa
WHRI2 - Waukegan Harbor, IL 41 mi133 min WNW 5.1 G 7 37°F

Wind History for Calumet Harbor, IL
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Milwaukee, General Mitchell International Airport, WI3 mi21 minWNW 710.00 miFair44°F17°F34%1019.6 hPa
Milwaukee-Timmerman, WI13 mi28 minW 510.00 miFair39°F19°F45%1019.3 hPa
Waukesha County Airport, WI14 mi28 minWNW 610.00 miFair39°F21°F48%1019.3 hPa
Racine, Batten International Airport, WI15 mi20 minWNW 10 G 1510.00 miFair43°F20°F40%1020.4 hPa

Link to 5 minute data for KMKE

Wind History from MKE (wind in knots)
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Last 24hrE7NE8NE8NE10E10SE5E4E6SE7SE7S6S6S3SW7SW6SW4W4W5W3W4W4W4W6W7
1 day ago5E9E11E8E8E8E8SE10E7SE5SE4S4S3S5S3E4S3CalmSE4SE8SE5SE64SE6
2 days agoNW13
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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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