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The term "space weather" came into usage in the late 1950s as the space age began and satellites began to measure the space environment. [2] The term regained popularity in the 1990s along with the belief that space's impact on human systems demanded a more coordinated research and application framework.
Hail fog sometimes occurs in the vicinity of significant hail accumulations due to decreased temperature and increased moisture leading to saturation in a very shallow layer near the surface. It most often occurs when there is a warm, humid layer atop the hail and when wind is light.
Fog is commonly considered a surface-based cloud layer. [21] The fog may form at surface level in clear air or it may be the result of a very low stratus cloud subsiding to ground or sea level. Conversely, low stratiform clouds result when advection fog is lifted above surface level during breezy conditions.
The heat index is a combination of heat and humidity presented as the “feels like” temperature on your weather app. On Tuesday afternoon, it was around 103°F at Kansas City’s downtown airport.
This also forces temperature differences across warm fronts to be broader in scale. Clouds appearing ahead of the warm front are mostly stratiform, and rainfall more gradually increases as the front approaches. Fog can also occur preceding a warm frontal passage. Clearing and warming is usually rapid after frontal passage.
With temperature inversion, however, the signal is to a large extent refracted over the horizon rather than continuing along a direct path into outer space. Fog also produces good tropospheric results, again due to inversion effects. Fog occurs during high-pressure weather, and if such conditions result in a large belt of fog with clear sky ...
The National Weather Service warns drivers to slow down while driving in foggy conditions.
This can occur when, for example, a warmer, less-dense air mass moves over a cooler, denser air mass. This type of inversion occurs in the vicinity of warm fronts, and also in areas of oceanic upwelling such as along the California coast in the United States. With sufficient humidity in the cooler layer, fog is typically present below the ...