Sunday, March29, 2020
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Marine Weather and Tides
Duluth, MN

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 6:50AMSunset 7:35PM Sunday March 29, 2020 1:38 PM CDT (18:38 UTC) Moonrise 8:33AMMoonset 12:00AM Illumination 31% 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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LSZ144 /o.can.kdlh.ma.w.0030.000000t0000z-191001t0215z/ 906 Pm Cdt Mon Sep 30 2019
.the special marine warning is cancelled... The affected areas were... Two harbors to duluth mn... 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 0205z 265deg 44kt 4677 9135
LSZ144 Expires:201910010215;;023968 FZUS73 KDLH 010206 MWSDLH Marine Weather Statement National Weather Service Duluth MN 906 PM CDT Mon Sep 30 2019 LSZ144-010215-


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 291740 AFDDLH

Area Forecast Discussion National Weather Service Duluth MN 1240 PM CDT Sun Mar 29 2020

SHORT TERM. (Today through Monday) Issued at 435 AM CDT Sun Mar 29 2020

Our strong spring storm is moving across the area this morning, with the surface low now near the southeast tip of MN, with a warm front extending east across southern Wisconsin and Wisconsin. Strong northeast winds are blowing across the eastern portions of the forecast area, with wind gusts of 25 to 35 mph for most of NW Wisconsin. A narrow area of locally stronger winds blowing through the Twin Ports was gusting to 50 mph over the last couple hours. The precipitation is mostly snow over northeast MN and east central MN, but with mostly rain over most of northwest Wisconsin. It is hard to determine what precipitation type is falling over northern Douglas and Bayfield counties, but reports from closer to midnight were of snow, but temperatures are very close to thresholds and it may remain a mix yet. Today, the surface low will move off to the east-northeast across Wisconsin and onto northern lower Michigan by this evening. Expect that the precipitation is extending as far west as it will this morning, and it will slowly pull off to the east during the day today, then lingering over northwest Wisconsin this evening and the first part of the overnight time range, but should be out of the area by Monday morning. This morning, I expect the snow that is over northern Minnesota and northwest Wisconsin will gradually switch back to rain by mid to late morning. Whatever we have on the ground for snow by sunrise will be it by then, as the temperatures will begin rising shortly after and the snow will be melting on the ground as well. It should continue to snow in places this morning, but do not expect much additional accumulation. Have trimmed some Wisconsin counties out of the advisory as the are too warm for snow and have been reporting no more than rain all night. Otherwise have left winter headlines as they were. We can begin removing them in the next few hours as we see precipitation types begin shifting back to rain. The very strong winds in the harbor as well as farther east along the South Shore of Lake Superior appear to have justified the lake shore flooding headlines, and from webcams it appears there are large waves coming onshore, though it is hard to tell if there has been much flooding inland. We will have to wait for daybreak to make that determination as well. These headlines expire at 7 AM this morning, and depending on what we see after sunrise, we will make a determination then on whether to extend them or not.

Things quiet down later tonight and Monday with a ridge of high pressure beginning to build into the area. Sunshine and the very dry incoming airmass should produce a warm day on Monday, with highs pushing to around 50 in some locations, though it will be cooler near Lake Superior.

LONG TERM. (Monday night through Saturday) Issued at 435 AM CDT Sun Mar 29 2020

Quiet and mostly sunny weather is expected on Tuesday with high pressure in place. Temperatures should warm nicely into the upper 40s and low 50s for most areas. A caveat to this will be near Lake Superior, where onshore flow will likely keep high temperatures in the upper 30s to perhaps low 40s. Also can't rule out some low stratus or fog streaming in off the lake.

A closed off 500-mb low will rotate over southern Alberta/Saskatchewan/Manitoba through the remainder of the week with short waves trailing off and pivoting through the Northland. The first will come in the form of a cold front on Wednesday into Wednesday night, bringing some chances for afternoon rain and overnight snow.

A more organized surface low is suggested to develop Thursday into Friday as an embedded wave within the broader upper level low passes through the upper Midwest. Right now there is decent agreement among the models in bringing the low through the eastern Dakotas and western Minnesota, which would place the Northland in the warm sector of this system and likely favor more rain instead of snow. A track change further east would mean colder temperatures and the possibility for some accumulating snow, however, so this system will have to be watched for changes over the next several days. Overall, temperatures will continue to be mild this week with highs generally in the 40s, though slightly cooler temperatures are expected by Friday.

AVIATION. (For the 18Z TAFS through 18Z Monday afternoon) Issued at 1240 PM CDT Sun Mar 29 2020

The Spring storm continues to affect DLH and HYR with MVFR cigs/vsbys in light snow. Some pockets of IFR cigs may also come into play, but confidence is low and have left out of the forecast. Expect the snow to change over to light rain and persist until at least 21Z at DLH and near 03Z at HYR. Elsewhere, VFR through the forecast. Gusty surface winds will diminish toward sunset and become light and variable.

MARINE. Issued at 1137 AM CDT Sun Mar 29 2020

A spring storm will continue to bring gale force northeasterly winds this morning. Gusts to around 40 knots are expected especially near the head of Lake Superior, along with wave heights around 6 to 12 feet. As low pressure moves northeast today, winds will become northerly this afternoon and will slowly decrease through the day. A gale warning is now in effect for 1 PM for all nearshore zones. Small craft advisories will likely be needed for the remainder of the afternoon and into the evening, especially for the South Shore where wind gusts will remain highest and higher waves around 4 to 6 feet will persist through the evening and overnight.

High pressure will move in on Monday, and this will bring light northeasterly winds Monday through Tuesday.

PRELIMINARY POINT TEMPS/POPS. DLH 43 26 44 23 / 100 30 0 0 INL 49 22 48 22 / 0 0 0 0 BRD 51 25 50 26 / 80 0 0 0 HYR 41 28 50 24 / 100 80 0 0 ASX 41 28 42 24 / 100 100 0 0

DLH WATCHES/WARNINGS/ADVISORIES. WI . Winter Storm Warning until 2 PM CDT this afternoon for WIZ001- 002.

MN . Winter Storm Warning until 2 PM CDT this afternoon for MNZ037.

LS . Gale Warning until 1 PM CDT this afternoon for LSZ121-140>148.



UPDATE . JDS SHORT TERM . LE LONG TERM . JDS AVIATION . GSF MARINE . GSF


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
DULM5 - 9099064 - Duluth, MN 1 mi57 min N 16 G 27 39°F 1004.6 hPa36°F
PKBW3 7 mi159 min NNE 6 38°F 1004 hPa (+2.0)35°F

Wind History for Duluth, MN
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Duluth - Sky Harbor Airport, MN4 mi43 minN 2010.00 miLight Rain and Breezy37°F35°F93%1005.4 hPa
Richard I. Bong Airport, WI5 mi44 minNNE 16 G 2610.00 miLight Rain38°F34°F86%1005.1 hPa
Duluth International Airport, MN7 mi44 minN 99.00 miLight Snow36°F32°F86%1006.5 hPa
Cloquet Carlton County Airport, MN22 mi44 minNNW 710.00 miFair37°F32°F81%1005.4 hPa

Link to 5 minute data for KDYT

Wind History from DYT (wind in knots)
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N14N17N13N19N15
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1 day agoE3E6E5NE3CalmCalmN4NE3CalmCalmCalmNW4N4E4E3NE4N6N5NE3NE9NE15NE16NE17NE17
G22
2 days agoNE13E11E12NE9NE8NE9NE6NE7NE7N3NE4N5NE5N5NE10NE6CalmCalmCalmCalmNE3NE3NE4E4

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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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 (14,3,4,5)
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Ground Weather Radar Station Duluth, MN
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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.