Pentwater, MI Marine Weather and Tide Forecast
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Marine Weather and Tide Forecast for Pentwater, MI

June 21, 2024 1:44 PM EDT (17:44 UTC) Change Location
Sunrise 6:03 AM   Sunset 9:30 PM
Moonrise 8:55 PM   Moonset 4:07 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.

Marine Forecasts
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LMZ848 Whitehall To Pentwater Mi- 1105 Am Edt Fri Jun 21 2024

Rest of today - Northwest winds around 10 knots. Partly Sunny. Patchy dense fog through early afternoon. A slight chance of rain showers through early afternoon, then a slight chance of showers and Thunderstorms in the afternoon. Waves less than 1 foot.

Tonight - Northeast winds 5 to 15 knots veering south toward daybreak. Mostly cloudy with a chance of showers and Thunderstorms. Waves 1 foot or less.

Saturday - South winds 10 to 20 knots. Rain showers likely and a chance of Thunderstorms. Waves 1 to 3 feet building to 3 to 5 feet.

Saturday night - Southwest winds 15 to 20 knots veering west toward daybreak. Rain showers and a chance of Thunderstorms. Waves 2 to 4 feet.

Sunday - Northwest winds 15 to 20 knots. Mostly Sunny. Waves 2 to 3 feet.

Monday - Northwest winds around 15 knots backing west late in the day. Sunny. Waves 1 to 2 feet.

Tuesday - South winds 15 to 20 knots. Partly Sunny with a chance of showers and Thunderstorms. Waves 2 to 4 feet.

LMZ800
No data


7 Day Forecast for Marine Location Near Pentwater, MI
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Area Discussion for - Grand Rapids, MI
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FXUS63 KGRR 211732 AFDGRR

Area Forecast Discussion National Weather Service Grand Rapids MI 132 PM EDT Fri Jun 21 2024

KEY MESSAGES

- Chance of thunder today, better chance Saturday and Saturday night

- Drying out Sunday; Pleasant Monday

- Strong storms possible Tuesday/Tuesday night

- Dry and cooler Wednesday through Friday

UPDATE
Issued at 1116 AM EDT Fri Jun 21 2024

The clouds were decreasing around the CWA late this morning and the instability was building. ML CAPE values were up to 1000 J/kg.
Effective bulk share values were elevated across the northern zones with a ribbon of 25+ knots. Cams were generating isolated storms by mid afternoon, which seems reasonable given the setup.
Low level convergence remains weak/neutral through mid afternoon thus the low level lift may be a limiting factor. The values do increase inland, mainly east of the CWA by late afternoon so its possible stronger convection may develop then. We will also be monitor the convection currently in WI, along with renewed develop there this afternoon. If this batch of convection holds together, it may make a run at the Ludington region this evening. Projected heat index values still support values in the mid to upper 90s for the advisory area, away from the lakeshore.

DISCUSSION
Issued at 338 AM EDT Fri Jun 21 2024

- Chance of thunder today, better chance Saturday and Saturday night

The frontal boundary that triggered storms Thursday is now south of the cwa and pretty nondescript. In it's wake, we'll have a little less instability today, however, precipitable water values will remain north of 1.75 inches. We probably won't see much precipitation this morning. However during the afternoon, the frontal boundary to the south will begin to move back north and there may be a 3-6 hr window beginning around 20z in which we see some convective development over the southeast cwa. There will likely be a decent lake shadow with any convective development due to persistent west winds. Gusty winds and torrential downpours are the main threat with any storms that develop today.

Highs around 90 today and dewpoints in the lower 70s will send heat indices into the mid 90s again; no changes to the Heat Advisory.

After a dry night tonight, chances for storms will increase Saturday from north to south. Showers/storms will likely be ongoing Saturday morning over northern Lower along the warm frontal boundary. Once the the attendant low moves east, the cold front will begin to drop south during the mid to late afternoon.
Showers and thunderstorms will likely develop along the front and will mostly affect the northern cwa Saturday afternoon. SPC has placed the entire cwa in a Marginal Risk for severe storms Saturday/Saturday night. Heavy rain will also be a threat with PWATs closing in on 2.5 inches.

Will maintain high probabilities (80-90 percent) for showers and thunderstorms on Saturday night as lead shortwave and sfc cold front pass through the region. Severe weather and heavy rain threat will linger in the evening then wane overnight with the passage of the cold front and departure of the 2"+ PWAT air. The frontal passage will also bring an end to the persistent heat and humidity.

- Drying out Sunday; Pleasant Monday

On Sunday the primary nrn stream H5 shortwave drops into the nrn GrtLks Rgn and a cooler/less humid air mass filters in on the heels of northwest winds. Morning clouds and lingering showers/drizzle giving way to decreasing clouds in the afternoon. Monday still looks like a pleasant day as the sfc ridge builds in.

- Strong storms possible Tuesday/Tuesday night

Tuesday could be an active weather day as the warm/humid air makes a quick return from the southwest and temps push toward 90 again. Fast northwesterly flow aloft could send an MCS or two our way from Wisconsin, thriving off cape values possibly in excess of 3000 J/KG.

- Dry and cooler Wednesday through Friday

The push of warmer air is short-lived as the passage of a cold front on Tuesday night/early Wednesday ushers in another installment cooler/drier air. Northerly winds on Thursday ahead of an advancing sfc high sends dew points down into the 40s/50s. Lows in the 50s and highs in the 70s expected later in the week as high pressure settles overhead by 12Z Friday.

AVIATION /18Z TAFS THROUGH 18Z SATURDAY/
Issued at 127 PM EDT Fri Jun 21 2024

Some showers/thunderstorms possible the next 6 hours before a quiet stretch should enter the forecast area. eastern areas most favored for shower/storms this afternoon so included some vcsh for GRR and LAN. could be a repeat of some fog tonight into early sunday but confidence too low to include at this time. showers and breezy conditions begin to work in toward the tail end of the taf period.

MARINE
Issued at 338 AM EDT Fri Jun 21 2024

A weak pressure gradient today will result in low wind and waves.
An approaching cold front Saturday will likely cause wind and waves to increase and a Small Craft Advisory/Beach Hazards Statement may be needed by Saturday afternoon.

GRR WATCHES/WARNINGS/ADVISORIES
MI...Heat Advisory until 8 PM EDT Saturday for MIZ056-057-064>067- 071>074.
MARINE...None.




Weather Reporting Stations
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Stations Dist Age Wind AirWater WavesinHgDewPt
LDTM4 - 9087023 - Ludington, MI 12 mi57 minNW 2.9G5.1
BSBM4 - Big Sable Point, MI 20 mi65 minN 4.1G6 64°F 30.24
MEEM4 - Manistee Harbor, MI 33 mi65 minN 1.9G4.1 65°F
45210 38 mi49 min 60°F 59°F1 ft
MKGM4 - Muskegon, MI 38 mi35 minSSW 4.1G5.1 66°F 30.1966°F
45161 41 mi35 min 1 ft


Wind History for Ludington, MI
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Airport Reports
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AirportDistAgeWind ktVisSkyWeatherAirDewPtRHinHg
KLDM MASON COUNTY,MI 12 sm29 minW 0310 smMostly Cloudy73°F68°F83%30.19
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Wind History graph: LDM
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Grand Rapids/Muskegon, MI,




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