Login to AccuWeather.com Premium Login to AccuWeather.com Professional Login to AccuWeather.com RadarPlus AccuWeather.com

Welcome Guest ( Log In | Register )

 
Reply to this topicStart new topic
> Do the great lakes ever freeze over?
snowmonster123
post Jan 3 2009, 11:52 PM
Post #1




Rank: Tornado
**

Group: Member
Posts: 285
Joined: 7-October 08
From: 5 miles south of St. Louis Missouri
Member No.: 15,859





Do any of the great lakes ever freeze over in the winter time? I am just kind of curious.


--------------------
Out of Hibernation and liking the set up for this winter so far!
Go to the top of the page
 
+Quote Post
LoganTyler
post Jan 4 2009, 12:50 AM
Post #2




Rank: F5 Superstorm
***

Group: Member
Posts: 4,836
Joined: 7-January 08
From: Maine, New York
Member No.: 12,058





I could go ahead and respond with my own take, but I found this already written out which is pretty much what I would have said to some degree.

Do the Great Lakes freeze in the winter?

The Great Lakes do freeze, but not completely. According to Ray Assel of the Great Lakes Environmental Research Laboratory, ice cover on the Great Lakes varies from lake to lake and year to year. For example, in a year with normal temperatures, 25 percent of Lake Ontario will be frozen over, while up to 90 percent of Lake Erie will be frozen. However, wind and water movement over bodies of water as large and deep as the Great Lakes make it unlikely the lakes have ever frozen over completely for any significant length of time.

The Great Lakes have come close to freezing over completely during the extremely cold winters of 1976-77, 1977-78 and 1978-79, with up to 90 percent ice coverage. However, Assel says that severe winter air temperatures are not necessary for large ice cover on the lakes. A cool summer and fall can result in below normal water temperatures by late fall. Extensive ice cover can then form with only average winter temperatures.

As for the Niagara Falls, the volume and speed of the water flowing over the falls prevents them from freezing, as does the ice-boom at the mouth of Lake Erie. The ice-boom is a series of floating steel pontoons extending across the river from Buffalo, New York to Fort Erie, Ontario. It prevents ice from clogging the river and hydroelectric intakes by helping an "ice bridge" (a stable ice cover) to form at the mouth of Lake Erie. Before the installation of the ice-boom in 1964, the American side of the falls froze over in 1909, 1938 and 1949 because ice jams upstream reduced the water flow. Ice bridges can also form below the falls when ice goes over the falls and freezes to the edges of the gorge, resulting in a buildup of ice (as thick as fifty feet in some places) stretching across the entire river. For photographs of historical ice bridges on the falls, go to Edsen Breyer's Postcard Museum.

For a look at current and historical Great Lakes surface and ice cover, go to GLERL's Great Lakes Surface Environmental Analysis pages.


Thank you for your questions!

References
Nilsson, Matt. Not Easy to Freeze. Earthwatch Radio, 1/25/00.
Niagara Falls, Thunder Alley.


--------------------------------------------------------------------------------
Answered on January 8, 2001


Story


--------------------
- Logan -

A.S. in Business Administration-- Broome Comm. College '08
B.S. in Accounting-- Binghamton University '10
M.B.A. in Public Accounting-- SUNY Oswego '12
M.S. in Forensic Accounting-- SUNY Brockport '13
Go to the top of the page
 
+Quote Post
WeatherMatrix
post Jan 5 2009, 07:06 AM
Post #3




Admin
***

Group: Administrator
Posts: 7,121
Joined: 6-March 05
From: State College, PA
Member No.: 2





QUOTE(LoganTyler @ Jan 4 2009, 01:50 AM) *
I could go ahead and respond with my own take, but I found this already written out which is pretty much what I would have said to some degree.

Do the Great Lakes freeze in the winter?

/size]

Thank you for your questions!

References
Nilsson, Matt. Not Easy to Freeze. Earthwatch Radio, 1/25/00.
Niagara Falls, Thunder Alley.
--------------------------------------------------------------------------------
Answered on January 8, 2001
[size=3]Story


You can see current maps of Great Lakes Ice on this NOAA site. For example, here's today's:
Attached thumbnail(s)
Attached Image
 


--------------------
-- Jesse Ferrell, FORUM ADMIN & MODERATOR

-- AccuWeather.com Meteorologist / Social Media Coordinator

-- My Blog | My Facebook Page




HELPFUL LINKS: MODEL FAQ / WEATHER QUESTIONS | FORUM FAQ / QUESTIONS
STAY ON TOPIC! TALK ABOUT PAST STORMS | TALK ABOUT NON-WEATHER STUFF
Go to the top of the page
 
+Quote Post
jdrenken
post Jan 5 2009, 09:08 AM
Post #4




Rank: F5 Superstorm
***

Group: SuperModerator
Posts: 33,033
Joined: 26-March 08
From: Columbia, MO
Member No.: 14,521





Didn't Tom Skilling at WGN also have something regarding this question?


--------------------
QUOTE
For the record...I AM THE MISSOURI MAULER!


It's a work in progress!

Have a question? Look at our FAQ first.






89.5 FM KOPN Weather Blog

If it is important enough to you, you will find a way. If it is not, you will find an excuse.
Go to the top of the page
 
+Quote Post
BriSr
post Jan 5 2009, 10:10 AM
Post #5




Rank: F5 Superstorm
***

Group: Member
Posts: 2,113
Joined: 18-January 08
From: Two Harbors,MN
Member No.: 12,681





Here's a good site for historical ice coverage, and averages.

This is for the years 1973-2002. Just click the year to see the extents through the season.

http://www.glerl.noaa.gov/data/ice/atlas/i...arts/index.html

This page gives you the max, min, and median extents for a given weekly period so you can compare now to what would be about average, or not. Just click "Graphic files" under the category. AVI format computer animations will open windows media player.

http://www.glerl.noaa.gov/data/ice/atlas/w...eeklystats.html

Here's another site to see the daily ice analysis of the Lakes, and other places.

http://ice-glaces.ec.gc.ca/app/WsvPrdCanQr...01&Lang=eng



--------------------


Avatar: Winter in the Northland of MN.

Photo courtesy Dennis O'Hara of Northern Images Photography. Browse photos of the Duluth, and the surrounding area. Live web cam, also.

http://northernimages.smugmug.com/galleries
Go to the top of the page
 
+Quote Post
snowmonster123
post Jan 6 2009, 11:18 AM
Post #6




Rank: Tornado
**

Group: Member
Posts: 285
Joined: 7-October 08
From: 5 miles south of St. Louis Missouri
Member No.: 15,859





QUOTE(WeatherMatrix @ Jan 5 2009, 09:06 AM) *
You can see current maps of Great Lakes Ice on this NOAA site. For example, here's today's:



Thanks a lot for the link.


--------------------
Out of Hibernation and liking the set up for this winter so far!
Go to the top of the page
 
+Quote Post

Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 

RSS Lo-Fi Version Time is now: 20th October 2014 - 08:00 AM