Marquette, MI Marine Weather and Tide Forecast

Marine Weather and Tide Forecast for Marquette, MI

April 16, 2024 6:38 AM EDT (10:38 UTC) Change Location
Sunrise 6:57 AM   Sunset 8:40 PM
Moonrise 12:07 PM   Moonset 3:30 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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LSZ248 / 719 Pm Edt Thu Oct 5 2023

.the special marine warning is cancelled - .
the affected areas were - . Huron islands to marquette mi - . 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 - . Marquette to munising mi - .
the Thunderstorms have weakened and no longer pose a significant threat to boaters.
lat - .lon 4677 8728 4691 8674 4647 8712 4645 8727 time - .mot - .loc 2318z 252deg 17kt 4685 8696 4666 8713

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7 Day Forecast for Marine Location Near Marquette, MI
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Area Discussion for - Marquette, MI
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Area Forecast Discussion National Weather Service Marquette MI 512 AM EDT Tue Apr 16 2024


- Elevated fire weather conditions today as warm, dry, and windy conditions overspread much of the UP, with the driest and windiest area being along the MI/WI state line.
- A low pressure tracks through the Upper Great Lakes during the midweek, causing widespread rain showers Tuesday night and Wednesday. Gusty east winds could reach up to advisory criteria (45 mph) over the Keweenaw and eastern counties of the U.P.
- Chances of precipitation remain possible (~15-40%) into late week, though uncertainty exists on timing and intensity.

Issued at 509 AM EDT Tue Apr 16 2024

RAP analysis shows a 990mb surface low over Nebraska while to the northeast is a 1027mb Hudson High. As the low pushes northeast and the high sags south, the pressure gradient builds, causing breezy conditions today. HRRR wind gusts, while they do have the tendency to overperform, show an ensemble mean of 35 mph this afternoon on the western half of the UP, with a 25th-75th percentile range of 30- 40 mph. Enhancing the wind gusts today in addition to the surface pressure gradient will be mixing of winds from aloft to the surface.
00Z GEFS mean 850mb winds are anywhere from 30-45 mph by the evening hours, so if a deep and well mixed boundary layer develops, the potential for even higher winds exists. This mixing will also bring quite dry air to the surface. With mainly clear skies in the east half and partly to mostly cloudy skies in the west, today's high temperatures will be warmer than normal. Low dew point air mixing to the surface and higher than normal temperatures is a pretty good recipe for low RHs. HRRR probabilities of RHs falling to below 25 percent is 40% for virtually all of the UP except the Keweenaw Peninsula. With a Hudson High being a typical lookout pattern, elected to go lower with RHs in the upper teens and lower 20s for much of the UP today. This prompted a SPS for elevated fire weather concerns. HRRR PoPs over the UP are sub-10% before 00Z, so relief from fire weather conditions will have to wait until tonight.

Issued at 501 AM EDT Tue Apr 16 2024

Beginning tonight, mainly after sunset, categorical PoPs for rain will spread w-e across the cwa supported by increasing upper diffluence and deep layer q-vector convergence ahead of the approaching Plains low and the categorical PoPs will continue into Wednesday as the low moves into Wisconsin.
Confidence is high in some spots getting a decent soaking of rain with this system as a stream of moisture off the Gulf of Mexico with PWATs in excess of an inch surge into the Upper Great Lakes. These PWAT values are above the 90th percentile of Green Bay's climatology and should support storm total QPF ranging from 0.5" to 2". This soaking rainfall should help alleviate fire weather concerns moving through the rest of the week. Another thing the PWATs and mid-level RH plots highlight is a dry slot following the initial round of showers lifting north. CAMs indicate that this would result in a brief break in the steady showers over the western UP late Tuesday night into Wednesday morning and in the east late Wed morning into early Wed afternoon, before the second wave of showers moves in later Wed afternoon and evening. Elevated CAPE of up to 500 j/kg could support isolated thunderstorms south central and southeast on Wednesday.

Strong easterly winds and gusts will also be a concern later tonight into Wednesday as the pressure gradient increases and a 60+ kt low level jet translates east across the area. EPS probability guidance indicates a 80-100% probability of wind gusts exceeding 40 mph later tonight into Wed afternoon across the Keweenaw and the eastern counties of Alger, Schoolcraft and Luce counties. Given that fcst soundings also support the higher wind gusts with a good chance of 45 mph gusts possible at times, decided to issue a Wind Advisory across Northern Houghton-Keweenaw and also Alger, Luce and Schoolcraft counties from 06Z-21Z Wed. Widespread gusts across the rest of the CWA are forecast between the 25 to 35 mph range during this period.

After the weakening southern stream shortwave and associated sfc low lifts northeast through Upper MI Wed night with showers ending from west to east late Wed night, attention turns upstream to a northern stream trough/closed low and associated sfc low over southern Saskatchewan. This northern stream trough and associated closed low will move east and phase with the remnants of the southern stream shortwave on Thu after it moves northeast of the Upper Great Lakes.
The resulting sfc low north of the Upper Great Lakes in northern Ontario will send a cold front across Upper Mi on Thursday but available moisture is somewhat limited at this point with the highest PWAT values ~.5 inch, highest east. Only isolated to scattered light rain showers are expected Thu into Thu night with the highest coverage over the eastern third of the cwa. Rain is the expected p-type. However, as the closed low lifts east-northeast through Ontario on Friday and then into northern Quebec on Saturday, the mid-level trough will move across the Upper Great Lakes Friday into early Saturday. This trough along with increasing CAA at 850 mb will lead to another round of isolated to scattered showers which will probably be enhanced by diurnal instability during the day on Friday. The CAA will also allow snow showers to mix in the rain Friday into Saturday.

Additional northern stream shortwaves in a northwest flow aloft will move over the Upper Great Lakes into early next week, with maybe isolated showers at times, but it looks like dry weather will mostly win out into Tuesday as sfc high pressure prevails through much of the period.

Issued at 122 AM EDT Tue Apr 16 2024

A very dry air mass will persist in the lower levels thru this aftn, allowing VFR to continue at IWD/CMX/SAW. This evening, low pres lifting toward the Upper Mississippi Valley will spread -shra and lower clouds into Upper MI. The -shra will reach IWD mid evening, followed by MVFR cigs near the end of the fcst period. At CMX/SAW, -shra will arrive around the end of this fcst period, followed by MVFR to IFR cigs late tonight. Light winds overnight will increase today, especially over western Upper MI, as pres gradient tightens over the area btwn high pres ridge exiting to the ne and the deep low pres lifting ne across the central Plains. Expect E to ESE winds to gust to 30kt at IWD and to 25kt at CMX. Gusts to around 35kt will be possible at IWD/CMX this evening. Strong low-level jet translating into the area will also lead to LLWS developing at all terminals this evening.

Issued at 501 AM EDT Tue Apr 16 2024

High pressure extending southeast over the Great Lakes will keep winds below 20 kts through much of this morning. As low pressure begins to move out of the Central Plains today, winds quickly increase to northeasterly gales to 40 kt in western Lake Superior this afternoon. Easterly gales overspread the lake tonight into Wednesday as the low passes through the Upper Great Lakes. Strongest gales are expected over the north central and east half of the lake up to 40-45 knots on Wednesday. Probabilities of storm force winds remain low at this time, with probabilities of winds exceeding 47 kts staying below 20%. Winds fall below gales in the immediate wake of the low late in the day Wednesday, though the enhanced pressure gradient will keep westerly winds of 20-30 kt in the forecast into the weekend. During the northeasterly gales late Tuesday, waves of 10-13 feet are possible with 8-12 feet waves on Wednesday across the whole lake, locally up to 17 feet between Isle Royale and the tip of the Keweenaw Peninsula. Waves fall below 6 feet early Thursday but remain at 2-5 feet until late Saturday.

Upper Michigan...
Wind Advisory from 2 AM to 5 PM EDT Wednesday for MIZ001-003- 006-007-014-085.

Lake Superior...
Gale Warning from 11 PM this evening to 8 PM EDT Wednesday for LSZ243>246-250-264>266.

Gale Warning from 2 PM EDT /1 PM CDT/ this afternoon to 2 PM EDT /1 PM CDT/ Wednesday for LSZ162.

Small Craft Advisory from 2 PM EDT /1 PM CDT/ this afternoon to 8 AM EDT /7 AM CDT/ Wednesday for LSZ240-241.

Small Craft Advisory from 2 PM this afternoon to 11 PM EDT this evening for LSZ242>246.

Gale Warning from 11 PM this evening to 2 PM EDT Wednesday for LSZ242-263.

Small Craft Advisory from 2 PM this afternoon to 8 PM EDT Wednesday for LSZ247>249.

Gale Warning from 4 AM to 8 PM EDT Wednesday for LSZ251-267.

Lake Michigan...
Small Craft Advisory from 2 PM this afternoon to 8 PM EDT this evening for LMZ221-250.

Gale Warning from 8 PM this evening to 2 PM EDT Wednesday for LMZ221-250.

Small Craft Advisory from 5 PM this afternoon to 11 PM EDT this evening for LMZ248.

Gale Warning from 11 PM this evening to 8 PM EDT Wednesday for LMZ248.

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesinHgDewPt
MCGM4 - 9099018 - Marquette C.G., MI 3 mi51 min WSW 1.9G4.1 35°F 30.1529°F
BIGM4 - Big Bay, MI 25 mi59 min S 1G1 31°F 30.13
KP53 40 mi43 min S 8 29°F 30.2026°F
STDM4 - Stannard Rock, MI 42 mi39 min 0G0

Wind History for Marquette C.G., MI
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Airport Reports
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AirportDistAgeWind ktVisSkyWeatherTempDewPtRHinHg
KSAW SAWYER INTL,MI 17 sm40 minNNW 0210 smClear27°F25°F93%30.16
Link to 5 minute data for KSAW

Wind History from SAW
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Tide / Current for
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Weather Map
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GEOS Local Image of great lakes   

Marquette, MI,

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