Friday, October15, 2021
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Marine Weather and Tides
Duluth, MN

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
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 7:25AMSunset 6:22PM Friday October 15, 2021 10:32 PM CDT (03:32 UTC) Moonrise 3:54PMMoonset 12:33AM Illumination 75% Phase: Waxing Gibbous; Moon at 10 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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LSZ145 Expires:202110102145;;468508 Fzus73 Kdlh 102116 Mwsdlh Marine Weather Statement National Weather Service Duluth Mn 416 Pm Cdt Sun Oct 10 2021 Lsz140>147-150-162-102145- /o.con.kdlh.ma.w.0027.000000t0000z-211010t2145z/ 416 Pm Cdt Sun Oct 10 2021
.a special marine warning remains in effect until 445 pm cdt... For the following areas... Duluth mn to port wing wi... 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... Outer apostle islands beyond 5 nm from mainland... Port wing to sand island wi... Sand island to bayfield wi... Silver bay harbor to two harbors mn... Taconite harbor to silver bay harbor mn... Two harbors to duluth mn... At 416 pm cdt, severe Thunderstorms were located along a line extending from 14 nm northwest of castle danger, to near sugar loaf cove, to 14 nm southeast of tofte safe harbor, moving north at 30 knots. Hazard...wind gusts to 40 knots and large hail. Source...radar indicated. Impact...small craft could be damaged in briefly higher winds and suddenly higher waves. Large hail could result in structural damage. Locations impacted include... Raspberry island lighthouse, split rock bay, castle danger, sand island, sugar loaf cove, horseshoe bay and safe harbor, tofte safe harbor, madeline island, twin points safe harbor, tofte, beaver bay, mouth of the cross river, bayfield peninsula sea caves, herbster, larsmont, and red cliff. Precautionary/preparedness actions... && lat...lon 4788 8988 4678 9064 4686 9081 4690 9080 4693 9086 4684 9110 4675 9152 4692 9189 4715 9149 4758 9088 4773 9055 time...mot...loc 2116z 195deg 32kt 4727 9179 4753 9111 4745 9054 hail...>.75in wind...40kts
LSZ145


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 152341 AFDDLH

Area Forecast Discussion National Weather Service Duluth MN 641 PM CDT Fri Oct 15 2021

DISCUSSION. (This evening through Thursday) Issued at 509 PM CDT Fri Oct 15 2021

Summary: Light showers are expected to continue tonight before clearing out Saturday morning. After the showers clear, windy, sunny, and warmer conditions will dominate for the rest of the weekend into early next week. Frost is possible for the next few mornings. The next system to move through in the middle of next week will bring more rain showers with cooler temperatures behind it.

Scattered showers ahead of an upper level trough are moving east across the CWA this evening, and should continue into tonight as the trough moves out of the area. Winds behind the precipitation is expected to be out of the northwest and gusty as the pressure gradient remains tight behind the trough. Saturday, a ridge will move in, bringing clear skies and warming maximum temperatures for the remainder of the weekend and into next week. Monday and Tuesday will be the warmest days as the back end of the ridge moves over the Northland. Temperatures at the 850 mb level will be in the 90th climatological percentile and surface highs will be in the upper 60s. Clear skies under at high pressure at night will allow for significant radiational cooling with temperatures in the low 30s each night for the next few nights. This could cause either fog or frost to form by early morning for the weekend.

The next system will be similar to a Colorado Low, as a closed, vertically stacked low moves over the Rockies and moves east across the Northern Plains. The global models are in fair agreement that the northeastern quadrant of the low will mainly affect our area, bringing more stratiform precipitation, and has higher QPF than the system we've seen this week. Northwesterly flow behind the low will advect cooler temperatures into the Northland for next weekend, though uncertainty remains high as models disagree on the magnitude.

AVIATION. (For the 00Z TAFS through 00Z Saturday evening) Issued at 641 PM CDT Fri Oct 15 2021

An upper trough was over the region this evening and was aiding in producing light showers and low VFR and MVFR ceilings. These conditions will continue into the evening but there will be improvement from west to east to VFR tonight into Saturday morning. MVFR ceilings may linger longest over portions of the South Shore and in the Arrowhead of Minnesota. Gusty winds will be possible but low level lapse rates decrease overnight so they should become less frequent. There is some concern there could be more cumulus on Saturday than currently forecast. Cold air aloft will be present early but there will also be warm air advection and drier air present. For now, we kept the TAF sites at scattered or few but there could be some broken low VFR or MVFR ceilings, most likely in the Arrowhead.

MARINE. Issued at 509 PM CDT Fri Oct 15 2021

Scattered showers tonight will continue tonight before dissipating Saturday morning. Westerly to northwesterly winds as the low pressure moves through will be strong across western Lake Superior. These winds and waves up the 4 ft will be hazardous to small craft through tomorrow night around the Apostle Islands and Bayfield Peninsula region. Oak Point through Saxon Harbor will also see some wind gusts above 22 kts tomorrow during the day. Small Craft Advisories have been issued due to these conditions. Sunday, winds and waves will decrease to a maximum of 20 kts and 2 ft over the lake.

PRELIMINARY POINT TEMPS/POPS. DLH 35 56 38 60 / 50 0 0 0 INL 34 56 36 60 / 40 0 0 0 BRD 32 59 37 64 / 10 0 0 0 HYR 35 58 34 62 / 20 0 0 0 ASX 36 59 38 63 / 30 10 0 0

DLH WATCHES/WARNINGS/ADVISORIES. WI . None. MN . None. LS . Small Craft Advisory until 1 AM CDT Sunday for LSZ146-147-150.

Small Craft Advisory from 10 AM to 8 PM CDT Saturday for LSZ148.



DISCUSSION . Kossen AVIATION . Melde MARINE . Kossen


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
DULM5 - 9099064 - Duluth, MN 1 mi44 min SW 8.9G11 46°F 61°F1011.6 hPa41°F
PKBW3 7 mi47 min W 1.9 45°F 1013 hPa41°F
45027 - North of Duluth, MN 11 mi32 min WSW 12 47°F 55°F1 ft1011.5 hPa (+0.0)44°F
45028 - Western Lake Superior 14 mi32 min W 16G18 48°F 57°F2 ft1012.4 hPa (+0.0)44°F
PNGW3 - Port Wing, WI 37 mi52 min WSW 7G15 47°F 1011.5 hPa
SLVM5 - Silver Bay, MN 56 mi52 min SW 8G9.9 46°F 1010.8 hPa

Wind History for Duluth, MN
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Duluth - Sky Harbor Airport, MN4 mi37 minWSW 1010.00 miOvercast46°F41°F82%1011.8 hPa
Richard I. Bong Airport, WI5 mi37 minWSW 510.00 miOvercast43°F39°F86%1012.2 hPa
Duluth International Airport, MN7 mi37 minW 1110.00 miOvercast43°F39°F86%1012.2 hPa
Cloquet Carlton County Airport, MN22 mi37 minW 610.00 miMostly Cloudy43°F39°F87%1011.5 hPa

Link to 5 minute data for KDYT

Wind History from DYT (wind in knots)
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1 day agoSW24
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SW11S9S8S12SW20SW15SW17
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2 days agoE3NE7E6E4NE9NE9NE11E8
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E20NE16NE15NE12SE9S11S11S14

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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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