Weather Glossary



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NAO Index This index measures the anomalies in sea level pressure between the Icelandic low pressure system ...
Negative-tilt Trough An upper level system which is tilted to the west with increasing latitude (i.e., with ...
Nimbostratus A cloud of the class characterized by a formless layer that is almost uniformly dark ...
Nocturnal Thunderstorms Thunderstorms which develop after sunset. They are often associated with the strengthening of the low ...
Nor'easter A strong low pressure system that affects the Mid Atlantic and New England States. It ...
North Atlantic Oscillation the NAO is a large-scale fluctuation in atmospheric pressure between the subtropical high pressure system ...
North Atlantic Oscillation (NOA) North Atlantic Oscillation - the NAO is a large-scale fluctuation in atmospheric pressure between the ...
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Weather can be active anytime when you make your visit to Canada. With each season offering its own unique conditions to observe. Booking coach or business class flights it is always a great time to visit Canada and its vast display of weather.