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gerardflyagain 4th August 2016 19:00

Rain in high pressure areas
 
Can anyone explain why rain was an incorrect answer for the below question? I thought Gales and Rain would be correct answers.

Which of the following conditions would you NOT expect to see during anticyclonic conditions where the centre of high pressure is established overhead?

✓ Gales
✘ Rain

rnzoli 4th August 2016 19:19

Maybe because you can still expect thermic cloud build-up and showers in anticyclonal areas. Much more than gale force winds.

boerdet 4th August 2016 19:28


Originally Posted by gerardflyagain (Post 9462628)
Can anyone explain why rain was an incorrect answer for the below question? I thought Gales and Rain would be correct answers.

Which of the following conditions would you NOT expect to see during anticyclonic conditions where the centre of high pressure is established overhead?

✓ Gales
✘ Rain

In a anticyclone some light rain is possible, but no hard winds, because in the centre of a high there is always very few gradient, the isobars are never close together, per definition. Tim, senior forcaster

The Ancient Geek 4th August 2016 20:37

A lot depends on the location, for example the South African highveld sits squarely in high pressure during summer but you can depend on a good thunderstorm with localised gales every afternoon at around 4pm. This is caused by convection rather than circulation.

gerardflyagain 5th August 2016 07:23

boerdet, how does rain happen if the air is sinking?

So Ancient Greek, you CAN get gales in a high?

The Ancient Geek 5th August 2016 07:36

Indeed, but only in hot places where you get severe convective thunderstorms.
Probably better described as squalls rather than gales.
Always give Cumulonimbus a VERY wide berth. 20 miles is probably OK but YMMV.

gerardflyagain 12th August 2016 21:13

Thanks EGQL.


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