Ice continued to cling to the Great Lakes in mid-March, 2014. The Moderate Resolution Imaging Spectroradiometer (MODIS) aboard NASA’s Aqua satellite flew over the region on and captured a false-color image of the icy scene on March 18.
As of March 17, according to the National Oceanic and Atmospheric Administration (NOAA), 82.8 % of the Great Lakes remained ice-covered. That sets a new record high for this late in the season, after 35 years of record keeping. The previous mid-March ice cover high, 75.85% covered, was set on March 15, 1978.
The ice cover peaked this year at 92.2 % on March 6, according to NOAA’s Great Lakes Environmental Research Laboratory (GLERL). That was the second highest peak ice cover ever recorded for the Great Lakes since 1973. The highest cover was recorded in February 1979, when ice laid across 94.7 % of the surface of the Great Lakes.
This false-color image uses a combination of shortwave infrared, near infrared and red (MODIS bands 7,2,1) to help distinguish ice from snow, water and clouds. Open, unfrozen water appears inky blue-black. Ice is pale blue, with thicker ice appearing brighter and thin, melting ice appearing a darker true-blue. Snow appears blue-green. Clouds are white to blue-green, with the colder or icy clouds appearing blue-green to blue. (more)
Welcome to JetStream, the National Weather Service Online Weather School. This site is designed to help educators, emergency managers, or anyone interested in learning about weather and weather safety.
The information contained in JetStream is arranged by subject; beginning with global and large scale weather patterns followed by lessons on air masses, wind patterns, cloud formations, thunderstorms, lightning, hail, damaging winds, tornados, tropical storms, cyclones and flooding. Interspersed in JetStream are "Learning Lessons" which can be used to enhance the educational experience.
You are free to use the materials in any manner you wish. We welcome your feedback on this project. Your input will greatly assist others in teaching the "hows" and "whys" of weather. Not sure where to begin? Click to see all topics in JetStream in the Topic Matrix. Contact Us:
Steven Cooper Steven.Cooper@noaa.gov
Deputy Regional Director, NWS Southern Region Headquarters, Fort Worth, Texas
Dennis Cain Dennis.Cain@noaa.gov
a.k.a. "Professor Weather", NWS Fort Worth, Texas