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19-11-2006, 03:41
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#1
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Senior Cruiser
Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 49,139
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Lake Superior Factoids
Lake Superior Factoids:
Maximum depth1,333 feet (10 miles NW of Caribou Island)
Length 350 miles ~ Width 160 miles maximum
Elevation602 feet above sea level
Shoreline2,980 miles including islands - Surface area 31,700 square miles
Water clarity 65 - 75 feet
Water volume 440 trillion cubic feet, 3,000,000,000,000,000 gallons, or 10% of the worlds fresh surface water (One inch of water depth equals553 billion gallons)
Flushing rate400 500 years (Time required to change the water)
Detention time 191 years (average time a drop of water remains in the lake)
Flow rate into Lake Huron73,700 cubic feet per minute
Average water temperature40 degrees Fahrenheit
Calmest monthsJune and July ~ Stormiest monthsOctober and November
Maximum wave height31 feet
Ship wrecks recorded350 (over 1,000 lives lost)
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"
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19-11-2006, 10:16
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#2
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Senior Cruiser
Join Date: Dec 2003
Location: Marlborough Sounds. New Zealand
Boat: Hartley Tahitian 45ft. Leisure Lady
Posts: 8,038
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Quote:
Detention time 191 years (average time a drop of water remains in the lake)
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Hmmmm, think of that nxt time you flush the head.:-)
__________________
Wheels
For God so loved the world..........He didn't send a committee.
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19-11-2006, 10:57
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#3
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Moderator Emeritus
Join Date: Mar 2003
Location: Hayes, VA
Boat: Gozzard 36
Posts: 8,700
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Part of it is the watershed for lake Superior is quite small. Most of the inflow of water in a year is from rain directly falling into the lake. The second factor is as Gord points out it's 10% of the worlds fresh water.
The good news is the water is not any colder in the winter than it is in the summer. Not a place to go overboard. The swimming is quite poor except in the very few shallow areas near shore.
__________________
Paul Blais
s/v Bright Eyes Gozzard 36
37 15.7 N 76 28.9 W
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07-02-2007, 11:20
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#4
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Registered User
Join Date: Feb 2007
Location: Chicago
Boat: Currently boatless but trying to corret this.
Posts: 4
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I grew up sailing out of Bayfield, WI on Lake Superior. It is truely one of the great sailing areas of the world. It can be very remote and the water does tend to stay cold. However, the water temperature does not stay the same in the winter as in the summer. The bays, inlets, and waters around the Apostle Islands freeze over in the winter. You actully drive from Bayfield to Madeline Island on an ice road most of the winter. The main lake has only frozen completely over twice in the past 100 years. During the summer you will find water temps in the high 50's to mid 60's depending on where you are on the lake. The water is great for swimming if you don't mind the cooler temps. If you don't think it is check out the beach on Minnesota Point off Duluth, MN during a summer weekend. 100's of people in the water. It is also some of the clearist freshwater I have ever seen.
Water levels are usually directly related to the previous winters snowfall. Along Minnesota's north shore there are many rivers and creeks that feed the lake. I lived along the Lester River in Duluth, MN, and depending on the sping snow melt it was either a beautiful little brook or a raging river dumping thousands of gallons per minute into the lake.
Everyone should visit the area at least once in their life. The lucky ones will do it by boat.
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07-02-2007, 17:49
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#5
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Senior Cruiser
Join Date: Sep 2003
Location: Minneapolis MN
Boat: Searunner 40 Trimaran, Siruis 22 mono, 16 foot MFG daysailor
Posts: 515
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Morbid humour: We joke that the water on the open lake is so cold that a lifejacket is only good for recovering the body. In reality it is not quite that bad but I would doubt the water temp ever gets above 50-55 on the open lake. In the shallow sandy areas it will get warm enough for swimming but not every bay warms up enough for a leisurely swim. Jumping off the dock after a sauna at Thompson Island is a truely character building event, eh Gord.
Plabis is correct that the watershed is quite small but there are many, many rivers and streams running into the lake and only one outlet, the St. Mary's River. It is a truely spectacular sailing ground especially the Canadian shore. In some ways I am thankful for the short season, the remoteness, and the reputation as it keeps it from being overrun by hoardes of boaters and overdeveloped.
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08-02-2007, 00:09
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#6
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Senior Cruiser
Join Date: May 2003
Location: Chesapeake Bay
Boat: Sabre 28-2
Posts: 3,197
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I read somewhere a few years ago that Lake Huron and Lake Michigan are geographically the same body of water. If it hadn't been for a mistake in naming the lakes originally, Huron-Michigan would be the largest.
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08-02-2007, 17:30
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#7
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Senior Cruiser
Join Date: Sep 2003
Location: Minneapolis MN
Boat: Searunner 40 Trimaran, Siruis 22 mono, 16 foot MFG daysailor
Posts: 515
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Take a look at a map, Huron and Michigan are two distinct bodies of water connected by a narrow strait. I take the term "geographically the same" to mean they are at or near the same elevation. Using that logic we would have far fewer oceans than we have now. Also geologically they are quite differant from one other.
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08-02-2007, 19:06
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#8
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Registered User
Join Date: Sep 2006
Posts: 112
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Lake superior can also be surprisingly nasty, offering up waves 25 plus feet. This was a good day not to be out sailing! (This laker would be either 730 or 1000 feet long!)
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09-12-2007, 13:03
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#9
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Registered User
Join Date: Nov 2007
Posts: 87
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Swimming in Superior: the current at Park Point, the bar running from Duluth to Wisconsin, normally comes from the big lake, then turns. As you mentioned, Brrrr. But sometimes the current will shift along the North shore and shallows, and sweep along Park Point. Really nice swimming. Lived there nine years. Experienced that 3 times!
Rez
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10-12-2007, 02:47
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#10
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Senior Cruiser
Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 49,139
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Quote:
Originally Posted by sneuman
I read somewhere a few years ago that Lake Huron and Lake Michigan are geographically the same body of water. If it hadn't been for a mistake in naming the lakes originally, Huron-Michigan would be the largest.
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Geologically and hydrologically, Michigan and Huron are the same body of water (they have the same water level), but are geographically distinct.
Counted together, it (Michigan-Huron) would be the largest fresh water body in the world, by surface area. The Mackinac Bridge is generally considered the dividing line between them.
Lake Superior, Michigan, and Huron once formed one giant lake all at the same level. Glacial rebound is making Lake Superior rise, and Michigan and Huron fall in their height above sea level. The pivot is near Sault St. Marie.
THE SEPARATION OF LAKE SUPERIOR FROM LAKE MICHIGAN/HURON
THE SEPARATION OF LAKE SUPERIOR FROM LAKE MICHIGAN/HURON
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"
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24-12-2007, 12:27
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#11
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Senior Cruiser
Join Date: Sep 2003
Location: Minneapolis MN
Boat: Searunner 40 Trimaran, Siruis 22 mono, 16 foot MFG daysailor
Posts: 515
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Ahh, the internet. These photos posted by yotpix were not taken in Lake Superior. While this vessel is used on the Great Lakes it also plies the North Atlantic route during the winter. These photos were taken in Feb 1987 in the North Atlantic by the second mate George Ianiev.
__________________
Don't trust your dog to guard your lunch.
Patrick, age 9
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23-03-2019, 06:33
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#12
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Registered User
Join Date: May 2014
Location: Hancock, MI
Boat: Shannon 38
Posts: 14
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Re: Lake Superior Factoids
Sarah Belle, a 1978 Shannon 38 cutter ketch, is located at the Houghton County Marina, Hancock, Michigan, in the middle of the Keweenaw Peninsula sticking out into Lake superior. We are 400 miles due north of Chicago and 300 miles northwest of the Mackinac Bridge. The cruising season the short here. Generally, it is too cold to go anywhere before mid-June, and any time after the third week in August is marginal with the fall gales that sometimes come early. Air temperatures in June, July and the first two weeks of August are generally pretty warm, but usually never hot on the water. Water temperature peaks in August at 47° surface temperature, and can get as high as 67 on a nice, calm day. But as soon as the wind blows and stirs up the lake, surface temperatures drop to high 30s. So, it is always sock hat & Long John weather cruising.
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02-05-2019, 17:47
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#13
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Registered User
Join Date: May 2014
Location: Hancock, MI
Boat: Shannon 38
Posts: 14
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Re: Lake Superior Factoids
I sailed from Hancock to Isle Royale last June. Surface water temps got up to low 60"s on a bright sun, dead calm day. Wind picked up and stirred up the water, temp dropped to 38. Needless to say, the warm sail turned into sock hat and long johns.
We really like Stockton Island in the Apostiles, couple good anchorages if the weather is good.
Quote:
Originally Posted by Steve Rust
Morbid humour: We joke that the water on the open lake is so cold that a lifejacket is only good for recovering the body. In reality it is not quite that bad but I would doubt the water temp ever gets above 50-55 on the open lake. In the shallow sandy areas it will get warm enough for swimming but not every bay warms up enough for a leisurely swim. Jumping off the dock after a sauna at Thompson Island is a truely character building event, eh Gord.
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02-05-2019, 18:10
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#14
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Registered User
Join Date: Sep 2011
Location: Good question
Boat: Rafiki 37
Posts: 14,141
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Re: Lake Superior Factoids
Quote:
Originally Posted by Flightdeck
I sailed from Hancock to Isle Royale last June. Surface water temps got up to low 60"s on a bright sun, dead calm day. Wind picked up and stirred up the water, temp dropped to 38. Needless to say, the warm sail turned into sock hat and long johns.
We really like Stockton Island in the Apostiles, couple good anchorages if the weather is good.
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Keep heading north this coming season. If you like Isle Royale you’ll absolutely love the north shore.
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05-03-2022, 03:03
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#15
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Senior Cruiser
Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 49,139
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Re: Lake Superior Factoids
Shipwreck Society Finds Vessel at Bottom of Lake Superior after 130 Years
Once thought to be lost forever, the 130-year-old wreckage of the 172-foot schooner-barge “Atlanta” has finally been discovered, [undisclosed location] off Deer Park, Mich., in 650 feet of water, in Lake Superior.
Carrying a load of coal, the “Atlanta” sank, during a storm on May 4, 1891, while being towed by the steamer “Wilhelm”.
Caught in a northwest gale, not only did the towline snap, but so did Atlanta's sails, which left it at the mercy of the storm.
The seven-member crew loaded into a lifeboat, and paddled for hours, until arriving at the Crisp Point Life-Saving Station. While attempting to land the boat near the station, it overturned, and only two members made it safely to shore.
More ➥ https://www.shipwreckmuseum.com/ship...ter-130-years/
Video ➥ https://youtu.be/665MIRTTfv0
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"
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