Fog formation accidents compose 24% of all aviation accidents. The monetary impact of accidents, injuries, delays and unexpected costs from fog is about $720 million annually. Visibility of less than one mile – called fog – is far more obstructive than mists – visibilities greater than one mile. Most accidents aren’t from hitting structures protruding
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Heavy lake-effect snowfalls can shut down entire cities and drastically impede our ways of living. In particularly prone areas, feet of lake-effect snow can arrive within a day and pin people indoors. The mechanisms that manifest lake-effect snow can be thought of as components of a unified atmospheric machine. Its creation begins when wind meets
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How Midwestern blizzards are born. A Midwestern blizzard, the most common type, is born when a cyclonic, deep low spins next to a very cold, very high-pressured anticyclonic Canadian air mass while it pushes southeasterly into the upper Midwest. If the pressure gradient between the two air masses tightens, wind speeds increase. Moisture in the
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Frontal squall lines form just ahead of surface cold fronts and dry lines, and also ahead of upper-level fronts. If the necessary conditions exist, they may stretch to hundreds of miles in length. They may bring tornadoes and hail but they’re more commonly associated with strong straight-line winds. If the flow along a squall line
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