Grand Rapids, MI Marine Weather and Tide Forecast
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Marine Weather and Tide Forecast for Grand Rapids, MI

April 21, 2024 5:13 AM EDT (09:13 UTC) Change Location
Sunrise 6:48 AM   Sunset 8:34 PM
Moonrise 5:30 PM   Moonset 4:55 AM 
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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.

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Marine Forecasts
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LMZ846 Holland To Grand Haven Mi- 405 Am Edt Sun Apr 21 2024

Early this morning - Northwest winds 15 to 20 knots. Partly cloudy. Waves 2 to 3 feet.

Today - West winds 10 to 20 knots. Sunny. Waves 2 to 4 feet.

Tonight - Southwest winds 5 to 15 knots. Mostly clear. Waves 1 to 2 feet.

Monday - Southwest winds 10 to 20 knots backing south 20 to 25 knots late in the day. Sunny. Waves 1 to 3 feet building to 2 to 4 feet late in the day.

Monday night - South winds to 30 knots veering southwest gales to 35 knots toward daybreak. Mostly cloudy with a slight chance of rain showers. Waves 3 to 5 feet building to 7 to 10 feet after midnight.

Tuesday - Southwest gales to 35 knots decreasing to 30 knots. Rain showers. Waves 7 to 10 feet subsiding to 4 to 6 feet late in the day.

Wednesday - North winds 15 to 25 knots. Sunny. Waves 3 to 5 feet subsiding to 2 to 3 feet late in the day.

Thursday - Southeast winds 10 to 15 knots veering southwest, then veering northwest late in the day. Sunny. Waves 1 foot or less.

LMZ800
No data


7 Day Forecast for Marine Location Near Grand Rapids, MI
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Area Discussion for - Grand Rapids, MI
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FXUS63 KGRR 210735 AFDGRR

Area Forecast Discussion National Weather Service Grand Rapids MI 335 AM EDT Sun Apr 21 2024

KEY MESSAGES

- Elevated Fire Danger Today, Cold Tonight

- More Rounds of Frost/Freeze Risk Midweek

- Typical Unsettled Spring Weather This Week

DISCUSSION
Issued at 334 AM EDT Sun Apr 21 2024

- Elevated Fire Danger Today, Cold Tonight

As expected, frost and freeze issues tonight are low due to the stratus deck in place across lower Michigan. Have seen a few sites briefly dip below freezing during breaks in the clouds but the time frame for any one site is short.

Clouds exit with the departure of the low level moisture field this morning resulting in a breezy day with plenty of sunshine. These breezy conditions with gusts to 30 mph and clear skies will promote strong mixing allowing afternoon RH values to fall into the 25-30 percent range, especially east of US131. These combine to create an elevated fire danger across much of the area with conditions approaching red flag warning criteria, especially across Mid- Michigan. Highs today will be in the low to mid 50s.

Temperatures fall back into the upper 20s to 30s tonight as winds die off and few clouds expected. Given marginal temperatures for frost/freeze criteria and dry conditions hampering frost potential, will not be issuing any sort of headline with this package. Will defer to the subsequent shift for headline decisions.

Monday then continues to warm with highs in the 60s as the thermal trough across the area exits to the east. Clouds increase ahead of our next system but mostly sunny skies still generally expected.

- More Rounds of Frost/Freeze Risk Midweek

After a few warmer nights, a reinforcing shot of cold air descends on Lower Michigan for the middle of the week. Many growers in our area will be watching with concern as temperatures look like they will drop into the upper 20s in some of the areas with the most sensitive fruit tree conditions. Tuesday and Wednesday nights will be the area of concern, but Wednesday Night will probably end up being the coldest, as the surface ridge axis moves overhead and winds in the column drop to near-zero. The cloud forecast will need to be watched closely as any low clouds that form will keep things warmer, but at this point that is looking unlikely, so favorable radiational cooling conditions are expected.

- Typical Unsettled Spring Weather This Week

Overall the weather pattern this week will be a typical spring rollercoaster. A northern stream wave will briefly pull up some warmer air with marginal (<500 j/kg) instability Monday night and Tuesday, producing some rain and maybe a few rumbles of thunder. A cold front then drives through Tuesday night setting the stage for the chilly midweek weather. The rollercoaster continues late in the week as an upper wave ejects from the four corners region of the Southwest and moves toward the Minnesota/Wisconsin area - driving another airmass replacement into our area as warm and moist air rushes northward. This airmass will be warm enough that we could see temperatures approach 70 even under cloudy conditions. Depending on the diurnal timing of any embedded shortwaves, as well as any breaks in the clouds, we will likely be looking at thunderstorm risks as all of Lower Michigan comes firmly under the influence of deep southwesterly flow by Saturday. Currently models are keeping instability around/less than 1000 j/kg, but the specific details will matter for any severe weather risks, and these will clarify as we get closer in time.

AVIATION /06Z TAFS THROUGH 06Z MONDAY/
Issued at 135 AM EDT Sun Apr 21 2024

Steady 5,000 ft cloud layer remains widespread across all sites, but improvement is on the horizon. The back edge of these low VFR clouds is crossing Lake Michigan and should reach Muskegon in the next few hours, spreading inland by morning. Winds have diminished and will stay light out of the west or northwest overnight before gusts pick back up during the mid to late morning hours Sunday, reaching a peak in the afternoon. VFR ceilings and visibilities are expected to persist at all sites throughout the entire period.

MARINE
Issued at 334 AM EDT Sun Apr 21 2024

Winds and waves remain below levels hazardous to small craft today with 10-15 knot winds and 2-4 foot waves expected. A small craft advisory will likely be needed from later in the day on Monday through Wednesday as winds ramp up ahead of our next system.
Initially strong south to southwest winds ramp up ahead of a cold front with strong northerly winds behind it. Guidance suggests that gales are not off the table, but chances are low at present (20-30 percent). We will continue to monitor.

GRR WATCHES/WARNINGS/ADVISORIES
MI...None.
MARINE...None.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesinHgDewPt
HLNM4 - 9087031 - Holland, MI 31 mi73 min NW 13G20 40°F 51°F18°F
45029 32 mi53 min NNW 12G18 40°F 45°F4 ft27°F
45161 40 mi33 min 3 ft
MKGM4 - Muskegon, MI 40 mi43 min WNW 14G15 39°F 30.1326°F


Wind History for Holland, MI
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Airport Reports
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AirportDistAgeWind ktVisSkyWeatherTempDewPtRHinHg
KGRR GERALD R FORD INTL,MI 9 sm20 minWNW 0610 smOvercast37°F23°F56%30.12
Link to 5 minute data for KGRR


Wind History from GRR
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Tide / Current for
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Weather Map
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GEOS Local Image of great lakes   
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Grand Rapids/Muskegon, MI,



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