Wednesday, September23, 2020
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Marine Weather and Tides
Munising, MI

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 7:37AMSunset 7:46PM Wednesday September 23, 2020 2:09 PM EDT (18:09 UTC) Moonrise 2:16PMMoonset 10:51PM Illumination 39% Phase: Waxing Crescent; Moon at 6 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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LSZ249 /o.can.kmqt.ma.w.0086.000000t0000z-200826t1345z/ 934 Am Edt Wed Aug 26 2020
.the special marine warning is cancelled... The affected areas were... Grand marais to whitefish point 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... Munising to grand marais mi... The Thunderstorm has weakened and no longer poses a significant threat to boaters. Lightning will remain possible as the line of Thunderstorms moves through. Lat...lon 4663 8610 4662 8619 4653 8642 4638 8664 4638 8669 4643 8677 4641 8686 4661 8681 4676 8600 4663 8594 time...mot...loc 1326z 278deg 46kt 4647 8621
LSZ249 Expires:202008261341;;836962 FZUS73 KMQT 261334 MWSMQT Marine Weather Statement National Weather Service Marquette MI 934 AM EDT Wed Aug 26 2020 LSZ249>251-266-261341-


7 Day Forecast for Marine Location Near Munising, MI
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location: 46.38, -86.71     debug


Area Discussion for - Marquette, MI
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FXUS63 KMQT 231756 AFDMQT

Area Forecast Discussion National Weather Service Marquette MI 156 PM EDT Wed Sep 23 2020

SHORT TERM. (Today and tonight) Issued at 342 AM EDT WED SEP 23 2020

RAP 500mb analysis and GOES 16 Ch 09 water vapor highlight mid-level ridging extending across the plains into the Upper Great Lakes. To the south, mid-upper level troughing associated with the precip and moisture plume emanating from the remnants of tropical cyclone Beta have been largely confined to the Gulf, middle Mississippi and southern Appalachians. Upstream to the west, a subtle shortwave over northern Minnesota with a weak cold front are slowly lifting east- northeast into Ontario and further west, GOES 16 water vapor channels highlight a couple shortwaves ejecting eastward out of the southern Canadian and central US Rockies. Overnight, under the high pressure, mid-level dry airmass and subsequent radiational cooling, lows have fallen into the 40s in many interior areas and the 50s by the lakeshores. Some fog has been observed under the inversion in the east and along the Bay/Lake Michigan lakeshores.

Another warm day is in store for Upper Michigan today. With mostly clear skies during peak heating and with 850mb temps remaining near 14C, surface temps should have no problems warming into the 70s today. Given that models underperformed Tuesday's heating, and predominate flow at the surface will be from the southwest today, went 90 percentile highs which caps temps near 80 in the warmer interior. By the lakeshores, this keeps highs in the 70s. Further west, the aforementioned shortwave ejecting out of the central US Rockies will continue northeast today through the Central Plains toward the Great Lakes.

As this shortwave moves over Minnesota and Wisconsin, convection will lift into Upper Michigan tonight. Elevated instability across the west and central UP is progged near 1000 j/kg, which with decent mid-level lapse rates and deep shear near 30kts, a few strong thunderstorms can't be ruled out. With PWATs near 1.25" overspreading the region, moderate to heavy downpours will be possible. mbE velocities appear favorable for some training, and if this is realized, some localized ponding of water or minor flooding could be possible.

LONG TERM. (Thursday through Tuesday) Issued at 402 AM EDT WED SEP 23 2020

With precipitation around the time of this forecast period, Upper Michigan will remain cloudy in wake of cold front passage. Showers will continue across the north and a few isolated thunderstorms across the south. Decided to put slight chance of thunder back into the forecast, given if convection ahead of front clears out in time could allow instability to rebound. With cloud cover, expect highs mainly in the 60s with some upper 50s over the Keweenaw.

Ridging will start to build in behind late Thursday, heading into Friday allowing for partly to mostly sunny skies and temperatures should get back into the 70s. Wouldn't be surprised if a few spots made a run to 80, given how some spots overachieved on highs yesterday and if we mix out enough too. Could have a diurnal cu field develop as well. Friday looks to be a breezy day as a LLJ of around 30+ kt will bring breezy southerly winds and could have minor impacts along the Lake Michigan shoreline. We'll keep an eye on this over the next 24-36 hours.

This weekend could unfortunately trend on the wet side as a another shortwave will approach late Friday into Saturday which means another chance of showers and a few thunderstorms. Models are bringing in precip earlier than previous runs, meaning heaviest rain should move out by mid morning Saturday. PWATs are hovering around 1.50" which will support some heavy rain in spots. There could be another weak shortwave Saturday night into Sunday so left chance PoPs in forecast. Then attention turns to early next week.

Long range models are still hinting at a strong storm system sometime Monday into Tuesday. Exact timing still to be determined as GFS has an area of low pressure moving across the southern UP late Monday while the ECMWF has it moving through Tuesday morning. Either way, count on some rain and gusty winds at the least. Behind the system, much cooler air will filter in and by this time next week, potentially looking at highs in the 40s. Continue to stay tuned to the latest forecast as changes are certain to be made still between now and Monday.

AVIATION. (For the 18Z TAFS through 18Z Thursday afternoon) Issued at 155 PM EDT WED SEP 23 2020

Clear skies and VFR conditions persist at the terminals for the rest of the day today. Late this evening, a weak stationary front will develop and become the focus for showers (and storms at IWD) with the best chance of rain at IWD and lower chances at CMX and SAW. Once rain moves out, lower cig is expected to develop, with low-end MVFR likely at CMX and IWD, and IFR expected at SAW by Thursday morning.

MARINE. (For the 4 AM Lake Superior forecast issuance) Issued at 342 AM EDT WED SEP 23 2020

System will approach the Upper Great Lakes today, allowing winds to become northeasterly by late afternoon today. As this system moves through tonight, some showers and thunderstorms will be possible. After the frontal passage, expect northeasterly winds to increase to 20-25 kts this evening through Thursday. Some higher platforms could observed gusts near 30kts. The strongest winds are expected over the western half of the Lake.

By late Thursday, winds will return to below 20kts and become southerly through Friday. As the next system approaches the region late Friday, winds across the eastern lake are expected to increase to 20-25 kts. Following the passage of the system's cold front, westerly winds near 15 kts are expected across the lake through the weekend.

MQT WATCHES/WARNINGS/ADVISORIES. Upper Michigan . None. Lake Superior . None. Lake Michigan . None.

SHORT TERM . JP LONG TERM . JH AVIATION . RJC MARINE . JP


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KP53 4 mi73 min SSW 5.1 77°F 1013.6 hPa53°F
45173 15 mi39 min Calm 63°F 58°F1012.7 hPa
MCGM4 - 9099018 - Marquette C.G., MI 37 mi51 min SE 1.9 G 2.9 66°F 1012.4 hPa53°F
GRIM4 44 mi29 min ESE 7 G 7 68°F 1013.2 hPa50°F
GR4 - Grand Marais, MI 44 mi89 min E 6 G 8 61°F 1014.9 hPa
45172 46 mi39 min ESE 3.9 59°F 58°F1 ft1015.1 hPa
FPTM4 - Fairport, MI 53 mi89 min S 1.9 G 6 61°F 1014.9 hPa

Wind History for Marquette C.G., MI
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Munising - Munising Lakeshore Observation, MI4 mi73 minSSW 5 mi77°F53°F43%1013.6 hPa

Link to 5 minute data for KP53

Wind History from P53 (wind in knots)
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Last 24hrNE5N6NE5NW3CalmSW3S7S5SW4S8S7S9S7S6S8S8S6S6S6S5S4SW5S56
1 day agoS9
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SW6S6S5NW7NE5E6NE6
2 days agoS13
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Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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wmap_A
GEOS Local Image of    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Ground Weather Radar Station Marquette, MI
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