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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 ...
Red flag criteria is generally when relative humidity is at 15% or less, combined with sustained winds and/or gusts of 25 mph or greater. Both of these conditions must occur simultaneously for at ...
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.
It’s important to keep cool and drink plenty of water during hot weather. If you experience symptoms of heat-related illness, seek medical assistance right away.
The average and variations of weather in a region over long periods of time, which can be related to surface variables such as temperature, precipitation and wind. climate change Includes both global warming and its effects, such as changes to precipitation, rising sea levels, and impacts that differ by region. [1] climate change denial
A high ceiling or unlimited ceiling refers to mostly clear conditions, which are also safe flying conditions. Jennifer Gray is a weather and climate writer for weather.com. She has been covering ...
Diablo (hot, dry, offshore wind from the northeast in the San Francisco bay) The Hawk (cold winter wind in Chicago) Jarbo Gap Wind (associated with and often referred to as a Diablo Wind; katabatic winds in the Northern Sierra Nevada in the vicinity of Jarbo Gap, often contributing to the growth of local wildfires) [8] [9]