Wednesday, September30, 2020
Privacy Policy
L-36.com

Marine Weather and Tides
Cornucopia, WI

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 7:04AMSunset 6:52PM Tuesday September 29, 2020 11:13 PM CDT (04:13 UTC) Moonrise 5:29PMMoonset 3:24AM Illumination 96% Phase: Waxing Gibbous; Moon at 13 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
    EDIT      (on/off)   Help
LSZ146 646 Pm Cdt Fri Sep 25 2020
.strong Thunderstorms over western lake superior... The areas affected include... Lake superior west of a line from saxon harbor wi to grand portage mn beyond 5nm... Port wing to sand island wi... Sand island to bayfield wi... At 645 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 22 nm southeast of tofte safe harbor, to 13 nm northeast of raspberry island lighthouse, to near sand island, moving east-southeast at 35 knots. Locations impacted include... Sand island, raspberry island lighthouse, and madeline 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. 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 4691 9082 4694 9086 4693 9087 4697 9098 4730 9058 4718 9010 4700 9022 4680 9052
LSZ146 Expires:202009260015;;363183 FZUS73 KDLH 252346 MWSDLH Marine Weather Statement National Weather Service Duluth MN 646 PM CDT Fri Sep 25 2020 LSZ146-147-162-260015-


7 Day Forecast for Marine Location Near Cornucopia, WI
   Hourly   EDIT   Help
location: 46.9, -91.04     debug


Area Discussion for - Duluth, MN
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS63 KDLH 300327 AFDDLH

Area Forecast Discussion National Weather Service Duluth MN 1027 PM CDT Tue Sep 29 2020

SHORT TERM. (This evening through Wednesday night) Issued at 358 PM CDT Tue Sep 29 2020

A well-advertised outbreak of colder air will arrive on Wednesday which will linger for the remainder of the week. A deep and slow moving upper-level trough will loiter over the Northland throughout the short term period with several shortwaves rotating southward through the flow.

A deep and slow-moving upper-level trough was located over the western Great Lakes and the Mississippi River Valley this afternoon. An unusually strong 150 kt 300 mb jet streak will move over the Northland tonight with a ribbon of 500 mb vorticity nosing into the Upper Midwest this evening. Cold air advection will support a scattered shower development over northern Minnesota and adjacent areas of northwest Ontario this afternoon and this evening. Height falls associated with an approaching shortwave trough will re-introduce stratus and showers tonight through Wednesday. A few rumbles of thunder are possible this evening and again on Wednesday, with the best chance of isolated storms Wednesday afternoon. A few thunderstorms were noted near Kenora, ON this afternoon and instability may leak south of the international border before 00Z and would yield 250 to 500 J/kg of MLCAPE. Cold air drainage and katabatic flow may create locally stronger winds tonight along portions of the North Shore from Silver Bay to Grand Marais. Temperatures will trend cooler for Wednesday and the cold air advection will help keep the boundary layer well mixed. Momentum transfer from aloft will introduce gusty winds Wednesday into Wednesday evening. Wind gusts as high as 35 mph are possible in central Minnesota with gusts 20 to 25 mph over the rest of the Northland. Highs on Wednesday will be in the low to upper 50s. Shower chances continue Wednesday night as cold air advection continues.

LONG TERM. (Thursday through Tuesday) Issued at 358 PM CDT Tue Sep 29 2020

Upper-level trough axis will shift east over eastern Ontario and the central Great Lakes on Thursday and will push farther east and into New England by 00Z Saturday. Northerly flow over the Northland will reinforce the colder air over the region and keep temps well below normal through Monday. Several shortwave troughs will rotate southward over the area during the long range and will bring periodic chances of rain showers. Temperatures aloft will be cool enough to support a few snowflakes Thursday night and again Friday night into Saturday morning. Any snowflakes which survive to eye-level will be “conversational” in nature, and accumulation is unlikely. Lake effect rain showers are possible for portions of the South Shore and adjacent areas of northwest Wisconsin inland from Lake Superior Thursday and Thursday night. Have held onto slight and chance POPs for those areas.

AVIATION. (For the 00Z TAFS through 00Z Wednesday evening) Issued at 705 PM CDT Tue Sep 29 2020

VFR conditions are expected this evening and overnight. Several lines of scattered showers are moving across the area this evening, with a few isolated thunderstorms. However, these isolated TS have been mainly confined to the Arrowhead. Winds transition to the northwest this evening as a cold front passes through. Ceilings are likely to lower to MVFR early tomorrow morning as stratus moves in. In addition to lower ceilings, winds are expected to become gusty in the morning and continue for most of tomorrow. Scattered showers continue throughout the day, leading to periods of reduced visibilities down to 6 miles.

MARINE. Issued at 1027 PM CDT Tue Sep 29 2020

A cold front is expected to move through tonight, leading to scattered showers. Winds of 5 to 10 knots will shift to the northwest overnight. Winds are expected to strengthen behind the front, as strong cold air advection occurs. Northwest winds of 10 to 15 knots are expected with gusts up to 25 knots possible. A Small Craft Advisory has been issued from Sand Island to Saxon Harbor due to increased confidence in higher winds. Additional Small Craft Advisories may be needed for the remaining nearshore zones, since gusts up to 25 knots may be possible. Wind gusts are likely to calm down Wednesday night. Waves tonight are expected to be 2 feet or less before increasing to 1-3 feet tomorrow and Thursday.

PRELIMINARY POINT TEMPS/POPS. DLH 42 56 39 48 / 50 60 50 10 INL 41 54 34 45 / 40 70 60 10 BRD 44 55 41 47 / 60 50 40 10 HYR 41 56 39 48 / 60 60 50 20 ASX 43 58 40 49 / 50 60 60 30

DLH WATCHES/WARNINGS/ADVISORIES. WI . None. MN . None. LS . Small Craft Advisory from 10 AM to 11 PM CDT Wednesday for LSZ121-147-148.



SHORT TERM . Huyck LONG TERM . Huyck AVIATION . Unruh/GSF MARINE . Unruh/GSF


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PNGW3 - Port Wing, WI 20 mi34 min WNW 14 G 22 54°F 1002.4 hPa
DISW3 - Devils Island, WI 21 mi74 min W 4.1 G 7 55°F 1001.6 hPa (-1.0)50°F
SLVM5 - Silver Bay, MN 29 mi34 min NW 6 G 12 52°F 1001.4 hPa
SXHW3 - Saxon Harbor, WI 40 mi34 min S 6 G 8 52°F 1001 hPa
45028 - Western Lake Superior 42 mi34 min NNW 21 G 25 53°F 51°F2 ft1002.6 hPa48°F
45027 - North of Duluth, MN 47 mi34 min N 16 G 18 52°F 49°F1002.5 hPa46°F

Wind History for Duluth, MN
(wind in knots)    EDIT      (on/off)   Help
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
Last
24hr
SW6
SW5
SW6
SW4
G7
SW7
G10
SW4
SW6
SW6
G9
SW4
G7
SW6
G9
W12
G15
W10
W11
G14
SW10
G13
SW9
SW10
SW8
SW10
G13
SW4
G7
SW4
SW5
W6
NW12
G19
N2
G6
1 day
ago
NW8
G13
NW12
G20
NW9
G14
NW10
G14
NW11
G16
NW11
G15
NW13
G17
NW14
G21
NW9
G13
NW16
G20
NW18
G25
NW17
G23
NW16
G25
NW10
G19
NW14
G19
NW14
G22
NW14
G19
NW15
G20
NW12
G17
NW6
G13
SW5
W5
G8
SW6
SW6
2 days
ago
SW9
G12
SW10
G15
SW10
SW11
SW7
G11
SW10
G13
W14
G19
SW17
W15
G19
W11
G17
W11
G18
W12
G17
W9
W10
W11
NW6
G10
SW5
SW6
SW5

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
John F Kennedy Memorial Airport, WI25 mi21 minWSW 710.00 miA Few Clouds47°F44°F90%1001.8 hPa

Link to 5 minute data for KASX

Wind History from ASX (wind in knots)
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
Last 24hrW9W8W6SW7SW7W7W10W7SW6SW6SW8W8W10W10
G21
W11W11SW7SW6W5S5S6SW7SW6SW7
1 day agoSW5W6W4W5W5W6W7NW4W6W7NW8NW8W8N8NW8NW8NW6NW5W7W3W7W6SW7SW6
2 days agoW5CalmS5SW7SW7SW10SW9SW8SW9SW11SW11W13
G20
SW10
G19
SW10
G24
W13
G21
W10
G18
W9W7SW11SW6SW6SW7W5W5

Tide / Current Tables for
   EDIT   Weekend mode (on/off)   (on/off)   Help
Tide / Current Tables for
   EDIT      (on/off)   Help
Weather Map
       (on/off)   Help Weather Map
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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Ground Weather Radar Station Duluth, MN
   (on/off)   Help
weather_mapweather_map weather_map


Cookie Policy:
This website uses cookies to save your settings. No personal information is saved. I do not collect statistics on your visit. You can disable cookies in your browser if you like but it is not recommended for this site. I do not sell cookies. Go to a bakery for that. In fact I do not sell anything. To disable cookies from L-36.com, please refer to the Help button in your browser.
Privacy Policy:
I do not sell or share any user data or anything else for that matter. The only personal information I save is in the site log which has a line for each page view which includes the IP address your browser sends in the header as well as which page you requested. I use this to block hackers and other bad actors. I do not use this raw data to create profiles on users. I periodically delete the log files. Google supplies the ads on this site. Because I do not track who you are, I cannot customize how these ads are served. They may be personalized to improve the ad experience. If you do not want personalized ads, please adjust the settings on the Google site HERE.
. NOTE: The best I can determine, this site is not subject to CCPA but I am doing my best to comply anyway. 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.