3480 ft

2800 ft

2760 ft

3240 ft

A low pressure area is on your left.

A low pressure area is on your right.

You are flying towards an area of high pressure.

You are flying towards an area of low pressure.

The wind strength normally increases by a factor of 2 per 1000 feet up to the 850 hPa level.

The wind normally backs during climb out through the first 2000-3000 feet in the northern hemisphere.

The wind strength normally increases by a factor of 2 per 500 feet up to the 700 hPa level.

The wind normally veers during climb out through the first 2000-3000 feet in the northern hemisphere.

cold high.

warm low.

cold low.

warm high.

Development of stratiform clouds.

Increasing stability of air layers near the surface.

Development of an inversion at high level.

Development of a cold air drop.

Convergence near the ground.

Convergence aloft.

Vertically increasing convergence.

Vertically decreasing divergence.

50% oxygen, 40% nitrogen, and the rest other gases.

10% oxygen, 89% nitrogen, and the rest other gases.

21% oxygen, 78% nitrogen, and the rest other gases.

88% oxygen, 9% nitrogen, and the rest other gases.

Cirrostratus

 stratus

Nimbostratus

Altostratus

The saturated water vapor content increases as precipitation takes place when the temperature drops.

The actual water vapor content decreases to remain equal to the saturated water vapor content.

The saturated water vapor content remains constant as the air is at 100% relative humidity.

The actual water vapor content increases to remain equal to the saturated water vapor content.

Clear skies at night over an inland marshy area

A mild moist airstream flowing over colder surfaces with a wind in excess of 30 kt

Cold maritime air flowing over a warmer land surface at a speed greater than 15 kt

A mild moist airstream flowing over colder surfaces with the wind speed less than 15 kt