unstable air

A mass of air whose temperature lapse rate is greater than that of the air surrounding it. If this mass of air is forced upward for any reason, it will continue to move upward. Its speed will increase as it moves up, because the environmental lapse rate is higher than the dry lapse rate.

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The eye detects no joint in her skin plating save the sweeping hair-crack of the bow-rudder--Magniac's rudder that assured us the dominion of the unstable air and left its inventor penniless and half-blind.

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At the same time, unstable air is creating a strong rising motion, sending plumes of black smoke and heat sky-high.

About 50 homes threatened by 500-acre fire

If you are flying in an area of unstable air, experiencing turbulence and see a cumulus cloud building, go around it.

Handling windshear

Although the risk of flooding is believed to be low, the Met Office's chief forecaster said: "A front coming from the Atlantic will merge with warm, unstable air over the country to bring the risk of 30-40mm in the hour in places and more than 50mm in a few hours.

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It added: "A front coming from the Atlantic will merge with warm, unstable air over the country to bring the risk of 30 to 40mm (of rain) in the hour in places and more than 50mm in a few hours.

Weather warning issued as heavy rain expected

The volatile weather was thought to be down to the socalled "Spanish Plume" that pushed hot, unstable air from France into the UK.

The mystery of a fish out of water; WALKER SPOTTED FLATFISH 300m FROM SEA ON THE PAVEMENT

By contrast, hot, unstable air from France led to torrential downpours in England, Wales and Northern Ireland.

Surf's up - summer's back again

A Met Office spokesman said the spectacle was due to unstable air within the higher clouds.

'I never expected to see a tornado at the bottom of my garden ... It was a fantastic birthday present'

A lot of things had to come together - high temperatures, hot air, BUOYANT: cooler moist Atlantic air and deeply unstable air rising to an extreme 50,000ft.

Homes gutted, flights cancelled..and we're going to sizzle again; 59 flood warnings ++ 36,212 lightning bolts ++ high temps into August

The National Weather Service said the threat of tornadoes will last for several days as a strong weather system interacts with a large area of unstable air across the central and southern United States.

U.S. storms kills 21, tornado roars through Mississippi city

Channel 4 weather forecaster Liam Dutton said the bout of cold weather is explained by unstable air that results from cold Arctic air heating up as it travels over warmer water around the UK.

Arctic Blast Set to Bring Six Inches of Snow to UK

The new cold front with an extensive upper air trough, brought unstable air as its calling card.