ground frost


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Related to ground frost: hoar frost

ground frost

[′grau̇nd ‚frȯst]
(meteorology)
In British usage, a freezing condition injurious to vegetation, which is considered to have occurred when a minimum thermometer exposed to the sky at a point just above a grass surface records a temperature (grass temperature) of 30.4°F (-0.9°C) or below.
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As you would expect when the temperature is 0C on the grass then that is a ground frost.
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Looking ahead to Thursday and Friday, it looks like getting slightly milder, but there will still be a widespread ground frost in many places.
Also, after taking account of the influence of the monsoon climate during the previous October to May and ground frost levels it was found that the wind and snow produced by it would block the progress of installation and construction.
Some values are noted around 3oC, so isolated ground frost can be expected, particularly where either open spaces that allow maximum radiation or in sheltered spots that limit air movement.
In mainland areas the temperatures will come down to freezing point most nights with a ground frost.
Cardiff and the Valleys will probably just escape frost, there might just be a ground frost but not in the air.
Hibernacula are built by digging a large hole in the ground and then draining away the water to prevent ground frost.
As will be related, the diurnal cloud over Hellas early in the apparition gave way to ground frost, and then to bare ground by 2001 May.
The UK Civil Aviation Authority has issued a seasonal appeal for pilots and ground crew to not underestimate the dangers posed to aircraft of ice and ground frost this winter.
Ground staff at St Andrew's used plastic sheeting and a hot air system to try to protect the pitch from a severe ground frost but were unable to prevent the game becoming the weekend's highest profile casualty with the other games falling foul of the icy weather those hosted by lower league clubs.