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Marine Weather and Tide Forecast for Chatham, MI

June 25, 2024 2:05 PM EDT (18:05 UTC) Change Location
Sunrise 5:56 AM   Sunset 9:48 PM
Moonrise 11:44 PM   Moonset 8:43 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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LSZ249 313 Pm Edt Mon Jun 17 2024
a marine weather statement has been issued for the following areas - . Lake superior east of a line from manitou island to marquette mi and west of a line from grand marais mi to the us/canadian border beyond 5nm from shore - . Lake superior from grand marais mi to whitefish point mi 5nm off shore to the us/canadian border - . Marquette to munising mi - . Munising to grand marais mi - .
at 313 pm edt, doppler radar indicated strong Thunderstorms, capable of producing winds to around 30 knots. These Thunderstorms were located along a line extending from 17 nm southeast of stannard rock to laughing whitefish point, moving northeast at 45 knots.
precautionary/preparedness actions - .
mariners can expect gusty winds to around 30 knots, locally higher waves, and lightning strikes. Boaters should seek safe harbor immediately until these storms pass.
these strong Thunderstorms will likely produce winds to around 30 knots, and could pose a serious hazard for boaters. A special marine warning may eventually be required when these strong Thunderstorms reaches the nearshore waters. Boaters should consider heading for shore before these strong Thunderstorms arrives.
lat - .lon 4689 8602 4646 8699 4648 8702 4648 8707 4708 8687 4744 8621 4730 8587

No data

7 Day Forecast for Marine Location Near Chatham, MI
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Area Discussion for - Marquette, MI
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468 FXUS63 KMQT 251741 AFDMQT

Area Forecast Discussion National Weather Service Marquette MI 141 PM EDT Tue Jun 25 2024


-Today will be a warm and windy day, with highs around 80 and wind gusts up to 30-40 mph in the west.

-Pattern remains active, especially from late week into early next week, with yet more rounds of showers and storms

Issued at 500 AM EDT Tue Jun 25 2024

Thunderstorms are ongoing this morning throughout western and central Upper Michigan. A few of these storms have been producing hail, though the largest report thus far has been pea sized hail in Ironwood. Perhaps more perplexing has been the wind gusts, with storms on Isle Royale and the Keweenaw Peninsula gusting above 50 mph, though the wind threat has fallen significantly since the time storms initially passed through that area. These showers and thunderstorms are forecast to continue pushing east through the rest of the morning, with 00Z HRRR hourly PoPs falling below 30% UP-wide by 14Z.

As winds veer westerly behind the front, soundings show a 30+ kt jet at 850mb that can be mixed into, leading to a gusty day expected, especially over the west and particularly the Keweenaw. By 21Z, the HRRR shows 70-100% chances of wind gusts over 30 mph over the west half and along Lake Superior in the east, with the Keweenaw showing 40-90% probabilities of gusts over 40 mph. It will also be a warm day, with MOS guidance showing wide swaths of the south-central UP reaching into the mid 80s for highs today, with the NBM showing about a 25% chance that the M-35 corridor from Escanaba to Menominee could touch 90 today.

Overnight, clear skies will begin to cloud up some, though enough radiational cooling should occur to allow low temperatures to fall below 50 away from the Great Lakes. A very subtle 500mb shortwave will be pushing southeast from northwest Ontario, reaching the western UP by 12Z Wednesday. Just enough forcing and moisture will be present for slight-chance (15-30%) PoPs over the west half, though precipitation will be struggling against the near-1015 surface high pressure present at the time, so impacts of any showers will be light, if any.

Issued at 408 AM EDT Tue Jun 25 2024

Starting Wednesday, a northwest flow shortwave and associated cold front moves from the Northern Plains across the Upper Great Lakes.
Most of the models show an inverted sfc trough inflection associated with the shortwave from northern WI along the U.P. border.
Instability is limited at 200 j/kg or less so expect isolated to scattered showers Wednesday, probably focused mainly west and along the WI border where the inverted sfc trough axis is situated. Expect drying and clearing skies from the west and north behind the shortwave trough and cold front in the afternoon into early evening as highs peak mainly in the 60s. However, those near the eastern Lake Superior shores may stay in the 50s throughout the day.

Weak high pressure ridging persists across the region from Wed night into at least Thu evening, dry weather prevails. Under clear skies and near calm winds, radiative cooling will drop Wed night lows into the 40s, coolest over the interior. Expect highs Thu generally in the lower to mid 70s.

Meanwhile, a trough just east of the Pacific northwest will move onshore Wednesday night. This trough progresses east along the international border toward the Upper Great Lakes by Saturday morning with at least a couple of shortwaves embedded in it. This will support cyclogenesis in the northern Rockies Thursday night with the low ejecting east into northern Ontario Friday night/Saturday. WAA/isentropic ascent and theta-e advection ahead of the low will support showers and thunderstorms spreading into Upper Mi on Friday. The first of the shortwaves within the mid-level trough moves through Sat which pushes a cold front through the area Fri night into Sat. Increased instability noted along the cold front should increase chances for thunder as it moves through the area at this time. The second shortwave in the trough will send a secondary cold front and another round of showers across the area late Sat into early Sun along with a burst of gustier nw-n winds and colder temps.

High pressure building in quickly behind the front will result in drier, albeit cooler conditions Sunday afternoon into Monday. Models advertise another shortwave and associated sfc low lifting off the Northern Rockies and tracking e across the Northern Plains and Canadian Prairies into the Upper Great Lakes for early next week.
This feature will bring another round of showers/t-storms into the area for next Mon night into Tuesday.

Issued at 140 PM EDT Tue Jun 25 2024

With drier air advecting into the area on gusty wnw winds this aftn, VFR will prevail at IWD/CMX/SAW. These winds will gust to around 20kt at IWD, to around 30kt at CMX and to around 25kt at SAW. Winds will diminish toward sunset and then veer n to ne. In the 09z-12z timeframe, low clouds (MVFR cigs) will arrive at all terminals. A few shra may also occur at CMX btwn 11-14z. The MVFR cigs will scatter out to VFR at IWD by aftn and at CMX/SAW during the aftn.

Issued at 408 AM EDT Tue Jun 25 2024

Thunderstorms tracking across eastern Lake Superior along a cold frontal passage will bring somewhat gusty winds and lightning to mariners over the eastern lake early this morning. Winds will shift from southerly to westerly winds behind the cold front later this morning while gusting as high as 30 kts. Strongest winds are expected over the central portion of the lake as fcst soundings and model guidance suggest a (20-30%) potential for west gale gusts to 35 knots, especially at higher platform locations like Stannard Rock. This period of longer fetch and stronger winds will help waves build up to 4-6 feet this afternoon and evening north of the Keweenaw. Winds around 20-25 kts veer north tonight behind an additional cold front that drops south across the lake before tapering off below 20 kts Wednesday morning. With high pressure over the lake through Thursday, winds are expected to mainly remain below 20 kts. A weakening low pressure tracking through the Upper Great Lakes early this weekend will allow for s-se gusts near 20 kt Friday and 20-25 kt nw gusts behind a cold frontal passage Saturday before building high pressure returns Sunday and ushers in lighter winds.

Upper Michigan...
Beach Hazards Statement until 9 PM EDT this evening for MIZ014.

Lake Superior...
Lake Michigan...

Weather Reporting Stations
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Stations Dist Age Wind AirWater WavesinHgDewPt
KP53 10 mi69 min0 68°F 29.6061°F
MCGM4 - 9099018 - Marquette C.G., MI 30 mi47 minN 5.1G7 74°F 29.5760°F
45211 40 mi39 min 47°F1 ft
GR4 - Grand Marais, MI 49 mi85 minW 9.9G14 64°F 29.64

Wind History for Marquette C.G., MI
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Airport Reports
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AirportDistAgeWind ktVisSkyWeatherAirDewPtRHinHg
KP0 sm9 minE 03--73°F64°F73%29.60
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Wind History graph: P53
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Marquette, MI,

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