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Cozad residents woke this morning to a weather phenomenon as a heat burst rolled through town. Temperatures rose 20 degrees in a matter of minutes while winds reached speeds of 75 miles per hour.
Trees were thrown into houses and cars but no injuries were reported. There was at least one close call. Nancy Wurst said her son just missed injury as a tree crashed into his car.
Originally posted by hotbakedtater
How strange! What causes a heat burst?
A heat burst is a rare atmospheric phenomenon characterised by gusty winds and a rapid increase in temperature and decrease in dew point. Heat bursts typically occur during night-time and are associated with decaying thunderstorms. While this phenomenon is not fully understood, it is theorized that the event is caused when rain evaporates (virga) into a parcel of cold dry air high in the atmosphere making the air more dense than its surroundings. The parcel descends rapidly, warming due to compression, overshoots its equilibrium level and reaches the surface, similar to a downburst. Recorded temperatures during heat bursts have reached well above 90 °F (32 °C), sometimes rising by 20 °F (11 °C) or more within only a few minutes.
Heat bursts are also characterised by extremely dry air and are sometimes associated with very strong, even damaging, winds.