hoar frost


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hoar frost

A type of icing that occurs in clear air on a surface whose temperature falls below the frost point of the air in contact with it. The water vapor condenses into white crystalline coating of ice that is usually of a feathery nature. This type of clear air icing may occur on an aircraft parked on ground or in air when it enters into a region where the air is warm and moist and after the aircraft has flown in a region of subzero temperature.
References in periodicals archive ?
First it often looks great when covered with a hoar frost and second, the old leaves will help to provide some protection against winter cold.
Artist Ella Turner has used a rostrum camera to bring to life Victorian novelty slides, like the portrait of a man whose nose and chin alternately grow and recede, and to explore the astonishingly fine detail of some of the photographic slides which include records of the exhibition and expeditions of the Birmingham Photographic Society and Charles Pumphrey's studies of hoar frost, taken between 1887 and 1891.
YOU can see why magazine articles on winter gardening are always illustrated by a photograph of a garden made glamorous by a coating of hoar frost.
Well-backed favourite Hoar Frost did the business for AP and Jim Best in the 2m handicap hurdle, while the champion jockey followed up on behalf of JP McManus aboard the Jonjo O'Neill-trained Yellow Flag, who, having spent a lengthy spell on the sidelines, followed up his recent Hereford success under a penalty in the 2m handicap chase.
This year there is plenty of rain and so far no crystal mornings when the hoar frost glistens to make the countryside a Father Christmas grotto.
20 Hoar Frost West Country Andrew King Ardkilly Rebel (5.
I came on a crisp morning when the hoar frost glistened and lingered on the trees and the mist licked the waters of the lakes.
The Richard Guest-trained Applaude had earlier obliged for Lee in the 2m selling hurdle when showing too much pace for Hoar Frost from the last flight for a two-and-a-quarter-length call.
Many plants such as sedums, phlomis, most ornamental grasses such as miscanthus, achillea, honesty, echinacea, fennel, bear's breeches, iris, alliums and aster make fairly sturdy seedheads and especially if the autumn is not too wet, are capable of withstanding much of the winter and then putting on a stunning display when covered with hoar frost.
Some plants look quite dramatic over the winter months, especially when covered with a hoar frost.
Sue Harding, secretary to Mick Channon, trainer of Rio Guru and Hoar Frost
Darryll Holland was another to complete a double when seen at his best on Hoar Frost and Mykingdomforahorse for Mick Channon.