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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With an unstable air mass affecting the area, clouds are likely to develop by afternoon on Tuesday and showers and isolated thunderstorms are expected mainly in the mountains, but also inland and possibly on the south and east coasts.

Rain on the cards for Tuesday

Met Office meteorologist Greg Dewhurst told PA the ingredients needed for a tornado are unstable air through stormy conditions and 'wind shear'.

Images reveal damage after 'tornado' and heavy rain hits Cheshire; Freak tornado leaves trail of destruction in its wake

With mostly moderate northwest winds, a cold front is passing through the country that will cause unstable air mass.

Cold Front Passing Through the Country, Rain is Expected

They can be caused by a combination of unstable air, solar heating, orographic lifting and an atmospheric trigger that lifts moist air parcels into areas of instability, amplifying buoyancy and propelling a building cumulus cloud to ever greater heights.

Air Mass Storms: They're generally easy to identify and circumnavigate, since they usually don't move much. But they still have a few tricks up their sleeves and must be avoided

The unstable air may also play a secondary role in putting off flies from landing on zebras.

Scientists reveal why zebras have STRIPES - and the reason might surprise you; A new study has suggests that zebras developed stripes to help keep them cool in the hot sun

Hailstorms happen when there is a formation of cumulonimbus clouds due to unstable air mass in the atmosphere, according to the PDRRMC.

Davao del Norte town surprised by hailstorm

However, it is not a perfect predictor of thunderstorms since they not only require unstable air but also moisture and a lifting mechanism.

SKEW-T LOG-P DIAGRAMS

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

CAPE provides a measure of the maximum possible kinetic energy that a statically unstable air parcel can acquire.

A Study of Large-Scale Surface Fluxes, Processes and Heavy Precipitation Associated with Land Falling Tropical Storm Lee over Gulf of Mexico using Remote Sensing and Satellite Data

The Met Office said the atrocious weather was a result of a fast-moving and active "unstable air mass".

TORNADO DEVASTATION; Holiday park wrecked, trees block roads and hundreds without power in 94mph twister terror

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."