Tuesday, May11, 2021
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Marine Weather and Tides
Grand Marais, MN

Version 3.4
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1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:19AMSunset 9:27PM Tuesday May 11, 2021 6:34 AM EDT (10:34 UTC) Moonrise 5:36AMMoonset 8:30PM Illumination 0% Phase: New Moon; Moon at 29 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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LSZ140 644 Pm Cdt Fri Sep 25 2020
.strong Thunderstorms over western lake superior... The areas affected include... Grand marais to taconite harbor mn... Grand portage to grand marais mn... Lake superior west of a line from saxon harbor wi to grand portage mn beyond 5nm... At 644 pm cdt, doppler radar indicated strong Thunderstorms, capable of producing winds to around 30 knots, small hail, and frequent cloud to water lightning. These strong Thunderstorms were located along a line extending from 11 nm southwest of horseshoe bay and safe harbor, to 26 nm east of tofte, to 22 nm southeast of tofte safe harbor, moving east at 45 knots. The strong Thunderstorms will remain over mainly open waters. Precautionary/preparedness actions... Mariners can expect wind gusts up to 33 knots...locally higher waves...cloud to water lightning strikes...small hail...and heavy downpours. Boaters should seek safe harbor until these storms pass. Intense lightning is occurring with these storms. If caught on the open water...stay below deck if possible and keep away from ungrounded metal objects. && lat...lon 4717 9010 4729 9059 4779 9023 4779 8969
LSZ140 Expires:202009260015;;363074 FZUS73 KDLH 252344 MWSDLH Marine Weather Statement National Weather Service Duluth MN 644 PM CDT Fri Sep 25 2020 LSZ140-141-162-260015-


7 Day Forecast for Marine Location Near Grand Marais, MN
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location: 47.86, -89.87     debug


Area Discussion for - Duluth, MN
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FXUS63 KDLH 110836 AFDDLH

Area Forecast Discussion National Weather Service Duluth MN 336 AM CDT Tue May 11 2021

DISCUSSION. (Today through Monday) Issued at 335 AM CDT Tue May 11 2021

Summary: High pressure over the region will keep things warm and dry over the next several days. Precipitation chances will slowly increase towards the end of the week and into the weekend.

A surface high pressure has set up shop over the Northland and will bring warm and dry conditions through the early parts of the forecast. Surface warming will lead to diurnally driven cumulus clouds populating during the daylight hours and dispersing after sunset for the next several days. Today marks the start of our warming trend thanks to an upper level low moving east away from the Northland and ridging pushing in from the west. Highs today will approach 60 with the rest of the week expected to see highs in the mid to upper 60s. Cooler temperatures will still permeate from Lake Superior keeping the shorelines in the 50s.

The surface high pressure begins to slide off to the southeast Thursday and return flow on the backside of this feature will promote southerly winds back into the Northland. The added moisture from these winds combined with diurnal heating could generate some afternoon rain showers on Thursday and Friday. There still remains some question as to whether or not a mid level shortwave will move over the region during this time span which would further increase the chances for precipitation.

Precipitation chances for this weekend continue to be a challenge. The 00Z suite of model guidance still shows a large divergence in solutions. A low pressure system is forecasted to eject out of the Rockies and traverse across the Midwest bringing widespread rainfall. A low level jet is also expected to ramp up and could elongate the precipitation field into the Northland. But confidence is still not very high in this scenario yet. For now, we have left the mention of "chance" for rainfall this weekend with Sunday being slightly more favorable.

AVIATION. (For the 06Z TAFS through 06Z Tuesday night) Issued at 1229 AM CDT Tue May 11 2021

VFR conditions throughout the forecast period. Surface high pressure will reign supreme over the Northland today with light winds expected. Look for diurnally driven cumulus field to scour the region as the surface warms and then vacate the area after sunset.

MARINE. Issued at 335 AM CDT Tue May 11 2021

A surface high pressure is setting up over the Northland and providing light winds across the Lake. Winds are expected to be less than 10 kts and primarily out of the west today. Waves will remain at 2 feet or less. No hazardous weather is expected over the next 48 hours.

PRELIMINARY POINT TEMPS/POPS. DLH 58 36 64 41 / 0 0 0 0 INL 61 33 68 39 / 0 0 0 0 BRD 61 37 66 43 / 0 0 0 10 HYR 59 31 65 37 / 0 0 0 0 ASX 58 34 65 40 / 0 0 0 0

DLH WATCHES/WARNINGS/ADVISORIES. WI . None. MN . None. LS . None.

DISCUSSION . Britt AVIATION . Britt MARINE . Britt


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KGNA 26 mi39 min 38°F 1027.5 hPa25°F
GD5 - 9099090 - Grand Marais, MN 26 mi47 min 42°F1026.3 hPa
ROAM4 - Rock of Ages, MI 30 mi35 min NNW 9.9 G 12 39°F 1028.6 hPa (+0.8)
DISW3 - Devils Island, WI 71 mi35 min WSW 5.1 G 5.1 39°F 1028.2 hPa (+0.7)36°F

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Grand Marais, The Bay of Grand Marais, MN26 mi39 minno data mi38°F25°F60%1027.5 hPa

Link to 5 minute data for KGNA

Wind History from GNA (wind in knots)
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Last 24hrN8N6N7
G16
35NE54--NW8
G17
5N765CalmN3N4CalmN5N3CalmCalmNW3Calm--
1 day agoN66NE9E8E6E63NE3CalmSW4SW4SE3CalmSW4SW4W3CalmCalmN7N8--N8
G17
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G16
N8
2 days agoCalmCalmE3E5NE6E7E6E5E5E6NE6E7NE7E8E8NE8NE6NE4NE5NE6NE5NE3NE56

Tide / Current Tables for
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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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