Out & About …

… on the North York Moors, or wherever I happen to be.

Little Blakey Howe

A bronze age burial mound, or “round barrow” on Blakey Ridge above Rosedale. The stone was erected as a boundary stone in the eighteenth century and is probably a reused standing stone of older antiquity.

The contrails high amongst the cirrus clouds can be used as a navigation aid. “Contrails” is an American word, a shortening of condensation trails. Most commercial airlines fly in a north west/south east direction in this part of the UK. But as contrails will only be seen when skies are clear and the sun is shining, it’s not that much use. Fairly useless really. More useful is a means of weather forecasting. Contrails only form when there is moisture in the air and moisture in the high atmosphere foretells of a worsening in the weather. The high cirrus clouds indicate the same thing, the approach of a weather front.

Notice also that one side of the contrails is smudged indicating the high level winds are blowing across them. Comparing the high level winds with the surface winds can also be used to forecast the weather. Stand with your back to the (surface) wind; if the high level wind is moving left to right, there may be an approaching warm front and the weather will deteriorate. Right to left: cold air is coming and the weather is likely to improve. Same direction: no imminent change.






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