Dave's Weather Blog

a weather observer's playground.

Weather satellite photo archives

Here are links to the KOMO TV Weather Blog, showing a satellite photo of the largest typhoon of 2008, and a NASA website showing their Top Ten satellite storm images.

http://www.komonews.com/weather/blog/59377717.html

September 28, 2009 Posted by David Carlson | Climate, Photos, Weather | | No Comments Yet

Lake Superior Surface Temperature

This morning, September 10, 2009, my wife and I paddled our canoe four miles round trip, from the front of our boathouse in Little Marais to a point near the Spirit of Gitche Gume B&B, Gift Shop, Coffee Shop.  I dragged a thermometer behind the canoe.  The surface temperature of the lake was a constant 62-63 degrees F.

I don’t have a weighted temperature probe to measure temperature at deeper levels below the surface, The charts below show three ways NOAA measures it.

It took more than two months for the surface temperature to reach what I think should be normal by the end of July.  And, the temperature often does peak again in early September.

Here is today’s posting from NOAA.

Noaa Lake Superior Sfc

Here are transect charts. The left most portion of  Charts A and E are close to Little Marais.  Temperatures above 50 degrees are just slivers of orange and yellow.  The depth of the lake is over 400 feet about a quarter mile out from our place, and drops to about 700 feet beyond that.

Noaa Lake Superior Transect

Profile charts are another way to look at it.  Buoy 45006 is about 30 miles east of here mid-lake.

Noaa Lake Superior Profile

September 10, 2009 Posted by David Carlson | Climate, Weather | | 1 Comment

More Climate Change news

Here is a link to the KOMO TV weather blog.  The post on climate change in the Arctic presents several interesting points.  One point answers the question “How do we know what has changed during the past 2000 years?”.  The second main point shows how we observe recent rapid change in climate.

Change in the Arctic climate is not the same as change in Northeast Minnesota, and change in the Arctic Ocean certainly is a more significant influence on current weather than the influence of short term variations in the surface temperature of Lake Superior.

http://www.komonews.com/weather/blog/57083752.html

September 5, 2009 Posted by David Carlson | Climate, Weather | | No Comments Yet