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A period of weather characterized by excessively high temperatures, which may or may not be accompanied by high humidity or by drought. Very hot weather is often only referred to as a heat wave if the temperature is abnormal relative to the typical climate for a given location during a given season. Contrast cold wave. heavy snow warning
A high pressure system in the upper atmosphere traps heat near the ground, forming a heat wave (for North America in this example). A heat wave or heatwave, sometimes described as extreme heat, is a period of abnormally hot weather [1]: 2911 generally considered to be at least five consecutive days.
Severe weather can occur under a variety of situations, but three characteristics are generally needed: a temperature or moisture boundary, moisture, and (in the event of severe, precipitation-based events) instability in the atmosphere.
Weather Words: Red Flag Warning. Jennifer Gray. Updated January 9, 2025 at 5:31 AM. ... For example, if a thunderstorm is expected after a very hot and dry period, a red flag warning might be ...
Cers (strong, very dry northeasterly wind in the bas-Languedoc region in southern France) Cierzo (cool north/northwesterly wind on Ebro Valley in Spain) Crivăț (strong, very cold north-easterly wind in Moldavia, Dobruja, and the Bărăgan Plain parts of Romania.) Etesian (Greek name) or Meltem (Turkish name) (northerly across Greece and Turkey)
Beyond more common weather terms lies a field of rarely used but humorous monikers to describe the weather around us. Some were just invented, some have been around for hundreds of years. Here are ...
Significant weather advisory SPS (alt.: significant weather alert) – A strong thunderstorm below severe criteria, containing small hail below 1 inch (2.5 cm) diameter, and/or strong winds of 39–57 miles per hour (63–92 km/h), is indicated by Doppler weather radar and may create some adverse impacts on travel.
Weather Words: Ceiling. Jennifer Gray. December 23, 2024 at 7:40 AM. Just like a ceiling in your home, our atmosphere has a ceiling as well. The ceiling refers to the height of the base of the ...