Saturday, April21, 2018 L-36.com


Marine Weather and Tides
Superior, WI

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.

Sunrise 6:06AMSunset 8:07PM Saturday April 21, 2018 2:30 AM CDT (07:30 UTC) Moonrise 9:42AMMoonset 12:23AM Illumination 34% 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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This is a Weather Statement Zone, please check the Date to see if it has expired
LSZ145 816 Pm Cdt Sun Sep 24 2017
.strong Thunderstorms over western lake superior... The areas affected include... Duluth mn to port wing wi... Grand marais to taconite harbor mn... 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... Silver bay harbor to two harbors mn... Taconite harbor to silver bay harbor mn... Two harbors to duluth mn... At 816 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 16 nm northwest of larsmont...to 8 nm southeast of superior harbor...moving northeast at 50 knots. Locations impacted include... Raspberry island...split rock bay...raspberry island lighthouse... Castle danger...sand island...sugar loaf cove...tofte safe harbor... Twin points safe harbor...tofte...mouth of the little marais river... Beaver bay...mouth of the cross river...port wing safe harbor...brule point...herbster...apostle islands sea caves...larsmont...split rock lighthouse...red cliff...and french river. Precautionary/preparedness actions... Mariners can expect gusty winds to around 33 knots...locally higher waves...and lightning strikes. Boaters should seek safe harbor immediately until these storms pass. && lat...lon 4689 9196 4715 9149 4754 9094 4762 9080 4687 9066 4682 9086 4688 9080 4693 9086 4691 9096 4684 9110 4682 9118 4683 9121 4674 9150 4666 9192
This is a Weather Statement Zone, please check the Date to see if it has expired
LSZ145 Expires:201709250215;;885660 FZUS73 KDLH 250116 MWSDLH MARINE WEATHER STATEMENT NATIONAL WEATHER SERVICE DULUTH MN 816 PM CDT SUN SEP 24 2017 LSZ141>147-162-250215-

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 210523
afddlh
area forecast discussion
national weather service duluth mn
1223 am cdt Sat apr 21 2018

Short term (this evening through Saturday)
issued at 317 pm cdt Fri apr 20 2018
high pressure over the great lakes region will maintain mostly
clear skies across the northland. Temperatures will once again
plummet below freezing tonight thanks to clear skies, calm winds,
and low humidity. Leaned on the colder side of model guidance for
overnight lows.

Light southerly winds will develop Saturday and make for an even
warmer day than today. Leaned on the warmest model guidance,
especially the bias- corrected gfs. Highs should be in the upper
50s to lower 60s. Expect a weak lake breeze near lake superior
because of the light wind field inland and the stark temperature
difference from the lake to inland areas.

Long term (Saturday night through Friday)
issued at 317 pm cdt Fri apr 20 2018
a ridge will build from the upper mississippi river valley late
on Saturday into eastern portions of ontario and the central great
lakes on Sunday. Behind the ridge, a trough will lift into
central portions of canada. At the surface high pressure will
build into the central and eastern great lakes, while a cold front
slides across the eastern dakotas into western portions of
minnesota by Sunday evening. Flow aloft will become more
southwesterly, which will warm air into the region aloft. In
addition, winds will be gusty due to the tightening pressure
gradient and deep mixed layer developing. Due to the combination
of these things opted to increase high temperatures and lower
relative humidities. A bit concerned that winds may be higher and
relative humidities lower across north central portions of
minnesota. High temperatures on Sunday range from the low 50s
along the lake superior shoreline, to the upper 50s and low to mid
60s inland.

The trough will continue lifting northeastward on Monday into
hudson bay, while the surface cold front slides through much of
minnesota. There are slight chances of a few rain showers
developing across portions of northeast minnesota during the early
morning hours. Despite the front passing through, warm
southwesterly air will advect into the region. This will bring the
mildest readings of the extended with highs in the mid 50s along
the lake superior shoreline and the low to mid 60s inland.

The forecast becomes a little more uncertain on Tuesday as an
area of low pressure develops across the central northern plains.

A trough will dig from western canada intermountain on Monday into
the northern plains and upper mississippi river valley by late
Tuesday. This may bring the next shot of widespread precipitation,
however there is a lot of spread between deterministic guidance
at this point in time of the track, speed and intensity of the
low. The GFS is the most robust with precipitation across the
northland - due to the northerly track of the low, while the ecwmf
continues to show little if any precipitation due to a southerly
track of an innocuous low. The gem is a compromise between the
two, but suspect the ECMWF is on the right track based on previous
systems moving through the area. Regardless temperatures will
cool down in wake of the system trough moving through. Behind the
exiting system, high pressure will build in on Wednesday before
another wave moves in from the northwest on Thursday. High
temperatures on Tuesday, Wednesday and Thursday range from the
upper 40s to the mid 50s.

Aviation (for the 06z tafs through 06z Saturday night)
issued at 1223 am cdt Sat apr 21 2018
high pressure will bring quiet weather to the northland TAF sites
throughout the period. With very dry air in place, we expectVFR
conditions to continue.

Preliminary point temps pops
Dlh 31 57 28 61 0 0 0 0
inl 29 60 32 63 0 0 0 0
brd 29 60 32 62 0 0 0 0
hyr 26 57 26 59 0 0 0 0
asx 29 59 27 59 0 0 0 0

Dlh watches warnings advisories
Wi... None.

Mn... None.

Ls... None.

Short term... Grochocinski
long term... Wl
aviation... Dap


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
DULM5 - 9099064 - Duluth, MN 6 mi43 min SSW 5.1 G 7 1028.9 hPa
SLVM5 - Silver Bay, MN 55 mi51 min SSE 1 G 4.1 36°F 1028.8 hPa

Wind History for Duluth, MN
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Duluth - Sky Harbor Airport, MN2 mi36 minSSW 510.00 miFair39°F24°F56%1029.8 hPa
Richard I. Bong Airport, WI5 mi36 minSSW 510.00 miFair34°F20°F57%1029.8 hPa
Duluth International Airport, MN13 mi36 minWNW 510.00 miFair40°F19°F43%1030.1 hPa

Wind History from DYT (wind in knots)
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Last 24hrSW7S7S6S6SW8SW7SW7S5SW3CalmCalmE6NE6NE5NE4CalmCalmSW9SW5SW8SW6SW7S4S5
1 day agoS3S4S3SW4SW4CalmS3SE3CalmCalmNE3E4SE7E6CalmE3CalmSW3SW5SW6SW6S5SW6SW7
2 days agoS4CalmN6NE6NE8NE10NE16
G19
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NE9NE9NE9NE11NE10N8N5N4NW3CalmCalmCalmS3

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map and Satellite Images
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wmap_A
GOES Local Image of GreatLakes    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.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Duluth, MN (3,6,7,8)
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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 numerious 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.