Weather Word of the Day | weatherology°
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Weather Word of the Day

August 3, 2021

Occluded front - An occluded front forms when a mid-latitude cyclone's cold front catches up and merges with the warm front. This occurs due to the fact that cold fronts move faster than warm fronts. Once a low pressure system contains an occluded front, the low pressure system begins to weaken. The passage of an occluded front will feel like the passage of a cold front to an observer as cooler and drier air moves in behind an occluded front.

August 2, 2021

Meridional flow - Meridional flow is a term that describes the direction of the upper level wind flow with respect to the Earth. When the upper level winds oscillate from north to south often, a meridional flow pattern is present. The opposite of meridional flow is zonal flow. In zonal flow, the upper level winds move in a more west to east fashion.

August 1, 2021

Solstice - There are two solstices that occur each year. They are known as the summer and winter solstice. These are the times of year the sun is either at its highest or lowest angle in the sky. The largest amount of sunlight in a day is seen during the summer solstice while the shortest amount of sunlight in a day is seen on the winter solstice.

July 31, 2021

Radiation Fog - This type of fog forms at night under clear skies with calm winds. Under these conditions heat that was absorbed by the earth's surface during the day is allowed to radiate back into space. As the earth's surface continues to cool, provided a deep enough layer of moist air is present near the ground, the humidity will reach 100% and fog will form. Radiation fog varies in depth from 3 feet to about 1,000 feet and is always found at ground level and usually remains stationary. This type of fog can reduce visibility to near zero at times and make driving very hazardous.

July 30, 2021

Syzygy - This term refers to the 2 times a month when the sun and the moon are lined up, which results in either a new or full moon. In both cases, the gravitational effects of these astronomical bodies reinforce each other and coastal areas therefore experience higher high tides and lower low tides.

July 29, 2021

Autumnal Equinox - The equinox is the day in which the sun is neither titled away or towards the sun, marking the start of astronomical autumn in the Northern Hemisphere. The time of this occurrence is approximately September 22. On that day, the length of the day and night are nearly equal. This is comparable to the vernal equinox, which occurs six months later.

July 28, 2021

Permafrost - A layer of subsoil that remains at a temperature of 32 degrees or colder throughout the entire year. Areas that have permafrost are mainly confined to high latitudes near the poles as well as high mountain ranges. The warming climate that is being experienced on Earth is decreasing the areal coverage of permafrost.