Thursday, July29, 2021
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Marine Weather and Tides
Grand Ledge, MI

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
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 6:25AMSunset 9:03PM Thursday July 29, 2021 10:47 AM EDT (14:47 UTC) Moonrise 11:16PMMoonset 11:22AM Illumination 73% Phase: Waning Gibbous; Moon at 20 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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LMZ845 South Haven To Holland Mi- 805 Am Edt Thu Jul 29 2021
.small craft advisory in effect through Friday morning...
Today..Northwest winds 10 to 20 knots increasing to 20 to 25 knots late in the day. Mostly cloudy until midday then clearing. Waves 4 to 6 feet.
Tonight..North winds 15 to 25 knots. Mostly clear. Waves 4 to 6 feet.
Friday..North winds 15 to 20 knots backing northwest late in the day. Mostly Sunny. Waves 1 to 3 feet.
Friday night..North winds 10 to 15 knots backing northwest around 5 knots late at night, then backing southwest toward daybreak. Partly cloudy. Waves 1 to 2 feet.
Saturday..Southwest winds 10 to 15 knots. Mostly Sunny with a chance of rain showers. Waves 1 to 3 feet.
Sunday..North winds around 15 knots becoming 15 to 20 knots. Sunny. Waves 3 to 5 feet.
Monday..Northwest winds 10 to 20 knots. Sunny. Waves around 1 foot.
LMZ845 Expires:202107292000;;640928 FZUS53 KGRR 291206 NSHGRR Nearshore Marine Forecast National Weather Service Grand Rapids MI 805 AM EDT Thu Jul 29 2021 For waters within five nautical miles of shore on Lake Michigan LMZ845-292000-


7 Day Forecast for Marine Location Near Grand Ledge, MI
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location: 42.75, -84.75     debug


Area Discussion for - Grand Rapids, MI
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FXUS63 KGRR 291200 AFDGRR

Area Forecast Discussion National Weather Service Grand Rapids MI 800 AM EDT Thu Jul 29 2021

LATEST UPDATE . Aviation

SYNOPSIS. Issued at 327 AM EDT Thu Jul 29 2021

- Storms move out this morning

- Cooler Friday

- Showers/thunderstorms later Saturday into Sunday

- Cool into midweek

DISCUSSION. (Today through next Wednesday) Issued at 327 AM EDT Thu Jul 29 2021

- Storms move out this morning

The threat for strong to severe storms is now mostly for the counties south and west of Grand Rapids. The rest of the area, will see showers and thunderstorms ending from north to south over the next few hours. Most area should be dry by 9 to 10 am. In those areas strong to severe storms are very unlikely.

The primary thunderstorm complex has dropped south to southern Wisconsin and with the best instability south of that line, it does seem greatest threat is now west of Lower Michigan. Still the low level jet does develop eastward from Wisconsin into Lower Michigan by 7 am, near I-94. The 1000/850 moisture transport vectors increase and move into our SW CWA by sunrise. So, given the mix layer cape is still expected to be near 2000 j/kg near I-94 west of US-131 and all the other factors, it seems reasonable to believe strong to severe storms are still possible in that area.

Once the convection is south of this area (mid to late morning) we should see decreasing clouds and lower dew points. The real push of cooler air comes in tonight when a secondary cold front comes through the area. Skies should be mostly clear.

- Cooler Friday

The surface high moves in to our area as the polar jet continues to deepen over the eastern CONUS. 850 temperatures fall to between 5 and 10C, which is the coolest it has been since late June. This will result in mostly sunny skies with highs only in the 70s.

- Showers/thunderstorms later Saturday into Sunday

A strongly digging northern stream shortwave moves into this area by later Saturday and that even farther deepens the eastern trough. That shortwave will have cold front associated with it and will have just enough moisture and instability for some scattered showers and thunderstorms. That will mostly be late Saturday into midday Sunday.

- Cool into midweek

As I have been writing about for most of this past week, the eastern trough will remain in place through at least the middle of next week. That will mean cooler temperatures into Wednesday. Once we get past Sunday I expect mostly dry weather through most of next week.

AVIATION. (For the 12Z TAFS through 12Z Friday morning) Issued at 800 AM EDT Thu Jul 29 2021

TAF sites are VFR to begin period as precipitation pulls away from CWA. However, still anticipate a period of MVFR ceilings later this morning as modest low-level cold advection commences behind cold front in cyclonically curved flow. As winds veer this afternoon, MVFR ceilings will lift/mix as drier air arrives, and VFR is then expected for remainder of period. Have included some wind gusts at MKG, given its proximity to stronger boundary-layer winds over Lk Michigan, and this is supported by HRRR wind gust diagnostic.

MARINE. Issued at 327 AM EDT Thu Jul 29 2021

With the cold air coming into tonight we do expect hazardous conditions for beach goes and small water craft into Friday. We will leave our marine headlines as is.

GRR WATCHES/WARNINGS/ADVISORIES. MI . Beach Hazards Statement through Friday morning for MIZ037-043- 050-056-064-071.

LM . Small Craft Advisory until 8 AM EDT Friday for LMZ844>849.



SYNOPSIS . WDM DISCUSSION . WDM AVIATION . Kenyon MARINE . WDM


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
HLNM4 - 9087031 - Holland, MI 78 mi47 min NW 12 G 14 75°F 78°F1011.5 hPa (+1.2)69°F
MKGM4 - Muskegon, MI 90 mi27 min N 17 G 22 73°F 1011.3 hPa67°F
SBLM4 - Saginaw Bay Light #1, MI 91 mi47 min WNW 5.1 G 7 74°F 1008.8 hPa (+0.0)

Wind History for Holland, MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Capital Region International Airport, MI8 mi54 minW 14 G 2210.00 miMostly Cloudy77°F67°F71%1010.5 hPa
Charlotte, Fitch H Beach Airport, MI13 mi52 minW 14 G 1810.00 miMostly Cloudy79°F68°F68%1011.5 hPa
Mason, Mason Jewett Field Airport, MI21 mi52 minW 8 G 1610.00 miFair78°F68°F72%1011.8 hPa
Ionia County Airport, MI21 mi69 minW 11 G 1610.00 miPartly Cloudy76°F68°F76%1010.8 hPa

Link to 5 minute data for KLAN

Wind History from LAN (wind in knots)
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Last 24hrNE33NE4Calm3CalmN5CalmW3CalmSE4S4S3CalmS7S8SW8SW11SW9SW6W9W11W11W14
G22
1 day agoW12NW7NW5N6N53--W8W9W8W6W4W4W3CalmCalmW3CalmW3W3NW3CalmCalmNE3
2 days agoW7W7W8NW7NW8
G16
NW8W8W7W5W6W3W5W5W4SW5CalmSW4W6SW6W7W6SW8W6W11
G20

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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