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  2. Climate of Edmonton - Wikipedia

    en.wikipedia.org/wiki/Climate_of_Edmonton

    Spring and autumn are both short and highly variable. Edmonton's growing season is from May 9 to September 22; [4] [11] Edmonton averages 135–140 frost-free days a year. [4] [12] At the summer solstice, Edmonton receives 17 hours and three minutes of daylight, with an hour and 46 minutes of civil twilight. [13]

  3. Distribution of lightning - Wikipedia

    en.wikipedia.org/wiki/Distribution_of_lightning

    Global map of lightning frequency--strikes/km 2 /yr. The high lightning areas are on land located in the tropics. Areas with almost no lightning are the Arctic and Antarctic, closely followed by the oceans which have only 0.1 to 1 strikes/km 2 /yr. The map on the right shows that lightning is not distributed evenly around the planet. [5]

  4. January–February 2019 North American cold wave - Wikipedia

    en.wikipedia.org/wiki/January–February_2019...

    On February 5, Edmonton recorded a temperature of −32.3 °C (−26.1 °F) and a wind chill of −37 °C (−35 °F), [16] as a result of the "polar vortex" making its way west. [ 17 ] [ 18 ] Extreme cold carried into March, with temperatures hitting −31.2 °C (−24.2 °F) in Calgary on the second, [ 19 ] and −38.6 °C (−37.5 °F) in ...

  5. Wave action (continuum mechanics) - Wikipedia

    en.wikipedia.org/wiki/Wave_action_(continuum...

    This wind wave model generates forecasts of wave conditions through the use of wave-action conservation and the wind-field forecasts (from weather forecasting models). [1] In continuum mechanics, wave action refers to a conservable measure of the wave part of a motion. [2] For small-amplitude and slowly varying waves, the wave action density is ...

  6. Radar mile - Wikipedia

    en.wikipedia.org/wiki/Radar_mile

    To relate radar timing to distances traveled by radar energy, the speed is used to calculate it. With speed of radar waves at approximately the speed of light in vacuum or 299,792,458 metres per second (300 m/μs; 984 ft/μs) and nautical mile at 1,852 metres (6,076 ft), the delay per nautical mile until the wave return is calculated as:

  7. Surf forecasting - Wikipedia

    en.wikipedia.org/wiki/Surf_forecasting

    In general, wave quality for surfing is usually better with less wind. If there is wind, wave quality is better if the wind is blowing gently offshore (away from the coast, towards the water.) This offshore airflow helps to hold up the face of breaking waves slightly longer, allowing a surfer to have more time to maneuver on the face of the ...

  8. Wind wave - Wikipedia

    en.wikipedia.org/wiki/Wind_wave

    A man standing next to large ocean waves at Porto Covo, Portugal Video of large waves from Hurricane Marie along the coast of Newport Beach, California. In fluid dynamics, a wind wave, or wind-generated water wave, is a surface wave that occurs on the free surface of bodies of water as a result of the wind blowing over the water's surface.

  9. Edmonton - Wikipedia

    en.wikipedia.org/wiki/Edmonton

    The Edmonton census metropolitan area (CMA) has the fifth-greatest population of CMAs in Canada and the second-greatest in Alberta, but has the largest land area in Canada. It had a population of 1,159,869 in the 2011 Census compared to its 2006 population of 1,034,945.