Thursday, April22, 2021
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Marine Weather and Tides
Duluth, MN

Version 3.4
NOTICE
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 6:05AMSunset 8:08PM Thursday April 22, 2021 9:38 AM CDT (14:38 UTC) Moonrise 1:29PMMoonset 3:28AM Illumination 81% Phase: Waxing Gibbous; Moon at 11 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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LSZ144 321 Am Cdt Tue Apr 6 2021
.strong Thunderstorms over western lake superior... The areas affected include... Duluth mn to port wing wi... Lake superior west of a line from saxon harbor wi to grand portage mn beyond 5nm... Port wing to sand island wi... Two harbors to duluth mn... At 320 am 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 near french river, to near duluth lift bridge channel, to 11 nm west of barkers island, moving east at 25 knots. Locations impacted include... Superior harbor, duluth lift bridge channel, brule point, and barkers island. 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. && lat...lon 4669 9229 4668 9224 4672 9223 4682 9210 4693 9176 4692 9112 4674 9150 4672 9157 4666 9193 4666 9203 4671 9210 4666 9211 4665 9216 4663 9220 4665 9230
LSZ144 Expires:202104060845;;116199 FZUS73 KDLH 060821 MWSDLH Marine Weather Statement National Weather Service Duluth MN 321 AM CDT Tue Apr 6 2021 LSZ144>146-162-060845-


7 Day Forecast for Marine Location Near Duluth, MN
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location: 46.76, -92.09     debug


Area Discussion for - Duluth, MN
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FXUS63 KDLH 221144 AFDDLH

Area Forecast Discussion National Weather Service Duluth MN 644 AM CDT Thu Apr 22 2021

DISCUSSION. (Today through Wednesday) Issued at 355 AM CDT Thu Apr 22 2021

Summary: Near critical fire weather conditions are expected today due to dry air near the surface and breezy winds. Today will be sunny with highs in the 60s across much of the Northland. A wet period begins on Friday with rain and snow remaining in the forecast through the weekend and into next week.

Today will be a change up from the past few days, with abundant sunshine and high temps warming into the 60s across much of the area. This is a result of a ridge and subsequent warm air advection that will occur from breezy southwest flow. The main concern today will be the near critical fire weather conditions across much of the CWA. Model soundings show a strong inverted V profile this afternoon, with the top of the mixed layer hovering around 750mb. The lack of moisture in the lower levels will result in low RH values around 20-25%. This deep mixed layer will also mix down wind gusts this afternoon of 15-20 MPH.

These near critical fire weather conditions will be short-lived as a shortwave and associated sfc low propagate into the area tonight. This shortwave will moisten the lower levels and bring rain on Friday. Expect rain to start in the morning hours on Friday and continue throughout the day. The rain and increased cloud cover on Friday will reduce high temps into the upper 40s to mid 50s. Rain will transition to snow Friday night as temps drop below freezing. Northeast Minnesota has the best chance for accumulating snow, since the cold front associated with the shortwave will have reached northwest Wisconsin by 00z on Saturday. Expect snow accumulations on Friday night to only be a few tenths of an inch in northeast Minnesota.

Immediately after Friday's shortwave moves east, a second shortwave will move into the CWA early Saturday morning. This will sustain the rain and snow showers into Saturday morning. This second shortwave will result in a few tenths of snow accumulation on Saturday morning across portions of northwest Wisconsin and the Arrowhead. Storm total snowfall from both Friday night and Saturday morning will only be a few tenths of an inch for portions of the area. However, northern Lake and Cook Counties may see slightly higher amounts around half an inch.

The remainder of the weekend into next week will remain wet as a series of shortwaves cross the CWA. Expect a diurnal trend in precip type as temps drop below freezing at night and daytime highs warm into the 50s and 60s.

AVIATION. (For the 12Z TAFS through 12Z Friday morning) Issued at 644 AM CDT Thu Apr 22 2021

VFR conditions are expected today through tonight. Gusty winds will develop this afternoon across all terminals and continue until easing this evening. Low pressure moves into the area early tomorrow morning, leading to increased cloud cover and MVFR cigs for BRD. Elsewhere, cigs will remain VFR tomorrow morning.

MARINE. Issued at 355 AM CDT Thu Apr 22 2021

Southwest winds today will be breezy around 10-15 knots. These winds will result in waves building to 1-3 feet along the North Shore from Taconite Harbor to Grand Portage as well as the western edge of the Outer Apostle Islands. Elsewhere today, waves are expected to be 2 feet or less. A ridge building over western Lake Superior will result in sunny skies today. Low pressure moves into the region tonight, developing rain showers on Friday afternoon. Winds remain southwesterly tomorrow at 10-15 knots with 1-3 foot waves in the previously mentioned zones along the North Shore and Apostle Islands. Winds shift Friday night to the north-northwest as a cold front crosses the region.

PRELIMINARY POINT TEMPS/POPS. DLH 60 38 50 31 / 0 10 30 30 INL 63 36 47 23 / 0 0 30 10 BRD 62 39 51 30 / 0 30 40 20 HYR 60 36 52 33 / 0 10 30 20 ASX 61 38 54 33 / 0 10 20 30

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

DISCUSSION . Unruh/JTS AVIATION . Unruh/JTS MARINE . Unruh/JTS


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
DULM5 - 9099064 - Duluth, MN 1 mi51 min SSW 8 G 12 39°F 1013.1 hPa27°F
PKBW3 7 mi99 min Calm 31°F 1014 hPa (-1.0)26°F
PNGW3 - Port Wing, WI 37 mi59 min SSW 6 G 11 39°F 1013.5 hPa
SLVM5 - Silver Bay, MN 56 mi59 min SSW 8.9 G 11 36°F 1013.2 hPa

Wind History for Duluth, MN
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Duluth - Sky Harbor Airport, MN4 mi44 minSSW 610.00 miFair39°F27°F61%1013.5 hPa
Richard I. Bong Airport, WI5 mi44 minSW 410.00 miFair37°F27°F66%1013.5 hPa
Duluth International Airport, MN7 mi44 minSW 810.00 miFair39°F27°F62%1013.8 hPa
Cloquet Carlton County Airport, MN22 mi44 minWSW 610.00 miFair37°F27°F65%1012.2 hPa

Link to 5 minute data for KDYT

Wind History from DYT (wind in knots)
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W10W10W12W4W8SW4SW4SW6SW7SW8SW7SW7SW5CalmCalmSW3SW4SW9
1 day agoN6N4NE8NE8NE7E4E7CalmNE9NE3E4CalmCalmNW5N6N7NW5NW5NW6W5NW5W5NW11NW9
2 days agoNW14
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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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