Saturday, January18, 2020
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Marine Weather and Tides
Superior, WI

Version 3.4
NOTICE
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 7:45AMSunset 4:52PM Saturday January 18, 2020 5:58 PM CST (23:58 UTC) Moonrise 1:29AMMoonset 12:15PM Illumination 37% Phase: Third Quarter Moon; Moon at 23 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 /o.exp.kdlh.ma.w.0030.000000t0000z-191001t0215z/ 912 Pm Cdt Mon Sep 30 2019
.the special marine warning will expire at 915 pm cdt... The affected areas were... 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... The Thunderstorm has moved out of the warned area and no longer poses a significant threat to boaters. Lat...lon 4685 9162 4690 9139 4678 9138 4674 9150 4672 9160 4672 9161 time...mot...loc 0212z 265deg 44kt 4677 9127
LSZ145 Expires:201910010222;;609953 FZUS73 KDLH 010212 MWSDLH Marine Weather Statement National Weather Service Duluth MN 912 PM CDT Mon Sep 30 2019 LSZ145-146-162-010222-


7 Day Forecast for Marine Location Near Superior, WI
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location: 46.71, -92.01     debug


Area Discussion for - Duluth, MN
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FXUS63 KDLH 182342 AFDDLH

Area Forecast Discussion National Weather Service Duluth MN 542 PM CST Sat Jan 18 2020

SHORT TERM. (This evening through Sunday) Issued at 328 PM CST Sat Jan 18 2020

The remnants of the potent winter storm that brought moderate to heavy snow accumulations to much of the region will continue to move eastward away from the region. However, the Northland will remain under a baggy mid-level shortwave trough that will keep chances of light snow over portions of the region tonight. The main areas of focus for additional snow will remain over far northern Minnesota thanks to a lingering inverted surface trough, and strong cold air advection/northwesterly cyclonic flow will support some lake effect snowfall along the Lake Superior snowbelt region, as well as along the Bayfield Peninsula due to the potential for a gravity wave to develop in the cold, northwest flow. 850 mb to lake surface delta-T values will range between 15 to 20 degrees C per the NAM soundings, along with plenty of moisture within the dendritic growth zone, which will support this lake effect snow. There may be some low- level directional wind shear that might inhibit the lake effect some, but the 1000-850 mb mean layer flow will become northerly this evening, which would be ideal for enhanced lake effect snow over northern Ashland and Iron counties. We made some adjustments to the Winter Storm Warning to have most of the counties in the forecast area drop at 00Z/6 PM this evening, with the warning continuing over the MN Arrowhead this evening and the South Shore through Sunday morning due to the lingering snow, as well as the threat for blowing and drifting snow in spots, making for hazardous travel conditions. Additional amounts over northern Minnesota will range between 1 to 2 inches, between 2 to 4 inches over the Bayfield Peninsula due to the gravity wave, and between 4 to 10 inches over northern Iron county due to the lake effect. There is the potential for very cold wind chills tonight, mainly over our far southwestern counties as we have a small area with wind chills colder than 25 below zero. Our neighboring forecast offices have a Wind Chill Advisory against us, but we decided to hold off for now due to the marginal nature of the wind chills in our area. Overnight lows will fall to the single digits below zero west of US Highway 53 and single digits east of 53.

Lake effect snow will continue through Sunday morning, with the Winter Storm Warning continuing through noon Sunday for Ashland and Iron counties. A low-amplitude shortwave trough will pass through the region late Sunday morning through the afternoon, which will bring chances of light snow over north-central Minnesota. Snowfall amounts will remain light, with only a few tenths of an inch expected with this next shortwave. Highs Sunday will warm to the single digits above zero west to the teens above zero east.

LONG TERM. (Sunday night through Saturday) Issued at 328 PM CST Sat Jan 18 2020

A fairly quiet start to the week with chilly temperatures, followed by a potentially more active pattern with warmer temperatures late week into next weekend.

A weak upper level trough will dive south from Manitoba/Ontario into Minnesota Sunday night. There will be some weak lift due to cyclonic vorticity advection which may result in an area of light snowfall, mainly affecting Minnesota. Moisture will be quite limited, so any accumulations will likely be on the order of a dusting to perhaps half an inch. Temperatures will be rather chilly with surface high pressure settled in over the Dakotas, which will result in low temperatures in the single digits below zero in Minnesota. A bit warmer in Wisconsin with north to northwesterly onshore flow from Lake Superior, which will likely keep some lake-effect snow showers going Sunday night for parts of the South Shore.

Behind the upper trough, dry air will move south from Canada, resulting in clearing skies on Monday. As the broad high pressure moves south across the central Plains, winds will become southerly with 850-mb warm air advection. This will kick off a warming trend going into the middle of the week, where high temperatures will likely top off in the 30s by Wednesday. Long-range models suggest that an upper level trough will pass across the Rockies and then dive southeast into the central Plains going into Thursday, developing a northward-moving Gulf of Mexico-based moisture stream with a surface low that may affect the Northland as early as Wednesday and lingering through the early part of next weekend. This could bring some snow, possibly mixed with rain during the daytime as temperatures warm possibly into the mid-30s in northwest Wisconsin. The GFS is the most aggressive at bringing precipitation as far northwest as the Twin Ports, while the ECMWF keeps most into northwest Wisconsin Thursday. In general, most of the activity looks to affect areas south and east of the region, but any change in the storm track to the northwest could mean the potential for some accumulating snowfall for parts of the region. Otherwise, expect generally cloudy skies with warmer temperatures towards the end of the week and into next weekend.

AVIATION. (For the 00Z TAFS through 00Z Sunday evening) Issued at 542 PM CST Sat Jan 18 2020

A mix of MVFR and IFR cigs with vsbys ranging from VFR to MVFR, with some isold IFR vsbys in the vicinity of light snow or BLSN. Will see these conditions continue for the night along with the gusty winds. Pockets of VFR cigs may also occur as drier air begins to filter across the terminals. Look for the light snow to diminish Sunday morning from west to east and cigs to improve to VFR. However, MVFR cigs are due to return to INL/HIB/BRD in the late afternoon as one more upper level impulse drops through the region.

PRELIMINARY POINT TEMPS/POPS. DLH 3 13 0 13 / 60 20 30 0 INL 5 9 -8 11 / 100 30 20 0 BRD -2 7 -5 10 / 20 20 20 0 HYR 4 16 2 18 / 80 20 20 0 ASX 12 19 7 19 / 100 40 30 0

DLH WATCHES/WARNINGS/ADVISORIES. WI . Winter Storm Warning until 6 PM CST this evening for WIZ001- 006>009.

Winter Storm Warning until noon CST Sunday for WIZ003-004.

Winter Storm Warning until 3 AM CST Sunday for WIZ002.

MN . Winter Storm Warning until 9 PM CST this evening for MNZ012-020- 021.

Winter Storm Warning until 6 PM CST this evening for MNZ010-011- 018-019-025-026-033>038.

LS . None.

SHORT TERM . JTS LONG TERM . JDS AVIATION . GSF


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
DULM5 - 9099064 - Duluth, MN 6 mi58 min 16°F 1007.3 hPa (+2.9)10°F
PKBW3 7 mi118 min NNW 11 22°F 1008 hPa (+2.0)16°F

Wind History for Duluth, MN
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Duluth - Sky Harbor Airport, MN2 mi63 minW 20 G 262.00 miLight Snow and Breezy16°F8°F73%1009.1 hPa
Richard I. Bong Airport, WI5 mi63 minWNW 18 G 264.00 miOvercast with Haze and Breezy16°F9°F74%1009.1 hPa
Duluth International Airport, MN13 mi63 minWNW 15 G 252.00 miLight Snow Blowing Snow11°F5°F77%1010.3 hPa

Link to 5 minute data for KDYT

Wind History from DYT (wind in knots)
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Last 24hrE14E18E21E23E18
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E14E13E11E10NE8NE7NE7E5E3CalmW3W4W7NW12W12
G17
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1 day agoW4SW4SW5S3CalmSW4SW3S4CalmCalmCalmCalmSE5SE3SE5SE4E7E7NE8E10E7E8E9SE7
2 days agoSW7
G15
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W10W14
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W13W10W13W5W7SW6SW8W8W8W6W7W7W4W8W7

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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Duluth, MN (18,4,5,8)
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Ground Weather Radar Station Duluth, MN
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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.