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They usually bring fair weather, but if they darken they will precipitate
it bring the rain
Storms
fair weather, no precipitation.
Low pressure system
You get no precipitation from cirrus clouds, they are too thin and too high. Hence, the weather they bring is dry.
none
Madagascar weather is normal can get colder in the winter.
Anticyclones generally bring calm, clear weather.
Anticyclones usually bring clam, sunny weather.
Commercial aircraft are pressurized to the equivalent of 8,000 ft of altitude, or lower. That means air pressure in the cabin is lower, not higher. Many people in Colorado live at 8,000 ft. Your barometer should be fine.However, while you could bring a dial type barometer aboard the aircraft, a mercury barometer could not be (hazard of the mercury in it.)
Anticyclones usually bring clam, sunny weather.