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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.
During severe weather events, the product can be used to describe the progress of severe weather and/or rainfall capable of producing flash flooding. Advisory – An advisory is issued when a hazardous weather or hydrologic event is occurring, imminent, or likely. Advisories are for "less serious" conditions than warnings that may cause ...
Severe weather is one type of extreme weather, which includes unexpected, unusual, severe, or unseasonal weather and is by definition rare for that location or time of the year. [5] Due to the effects of climate change , the frequency and intensity of some of the extreme weather events are increasing, for example, heatwaves and droughts .
Also actiniform. Describing a collection of low-lying, radially structured clouds with distinct shapes (resembling leaves or wheels in satellite imagery), and typically organized in extensive mesoscale fields over marine environments. They are closely related to and sometimes considered a variant of stratocumulus clouds. actinometer A scientific instrument used to measure the heating power of ...
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 ...
The Santa Anas are katabatic winds (Greek for "flowing downhill") arising in higher altitudes and blowing down towards sea level. [7] The National Weather Service defines Santa Ana winds as "a weather condition [in southern California] in which strong, hot, dust-bearing winds descend to the Pacific Coast around Los Angeles from inland desert regions".
Warnings can be provided up to a week ahead for severe weather including rain, thunderstorms, wind, snow and ice. – What does a red warning mean? Red is the most serious weather warning the Met ...
The National Weather Service defines drought as, “A deficiency of moisture that results in adverse impacts on people, animals, or vegetation over a sizable area.” ... drought is very difficult ...