Lake Superior Water Temperatures
For up-to-the-minute water temperatures of the
entire Lake Superior shoreline and open waters, coastwatch provides
accurate data (although it cannot be used for navigational purposes).
The key terms used by CoastWatch and their definitions
are below.
Key Terms and Definitions
1. An isotherm is a graphic representation of
temperature gradients. "Iso" (meaning similar) "therms"
(meaning temperatures) are connected points forming lines that
look like the elevation lines on a topographic map.
2. Fahrenheit temperatures are presented to the
nearest one-tenth degree. The grid pattern supplements the isothermic
representation.
3. The latitude and longitude grid provides both
degrees (0) and minutes (') distance north and west of the equator
and prime meridian.
4. Cloud covered areas of the lake surface cannot
be read accurately by NOAA satellites so the computer program
colors them black. Areas near the black masked cloud cover may
not be as precisely reported as those some distance from the
clouds.
5. Some areas are masked with grey color because
the computer program has indicated the temperatures presented
are probably cloud temperatures. The air temperature at the
tops of clouds can sometimes be very nearly the same as the
surface water temperature of the lakes below. The grey-scale
masking indicates that the accuracy of temperature reporting
is lower at this time.
6. Each coverage area has a unique name. Port views
are also provided.
7. The image date and time reflects the time when
the satellite flew over that area. Sattellites grid every area
several times per day.
Water
temperatures in the entire Lake Superior area.
Water
temperatures in the Central Lake Superior area.
Water
temperatures in the Eastern lake Superior area.
To reserve your date, give us
a call
at (906) 892-8230, or use our
online Reservation
Form.
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