Question

rapid change in air flow. technology using doppler radar is now able to detect this situation and make take - offs and landings much safer. the rapid rise in the warm air causes cloud formation. the moister the warm air, the more cloud development takes place. weather along a cold front is generally stormy and sometimes severe. tornadoes are associated with cold fronts. the united states has more tornadoes than any other country in the world. the u.s. has 4 times as many tornadoes than all of europe. most of these tornadoes form in the plains where there are no landforms that can disturb air flow. in the spring the continental polar air masses are extremely dry and cold. as these air masses are brought down into the u.s. they form cold fronts which drive into the warm moist air from the gulf of mexico. this creates cold fronts that are very severe and can produce damaging storms and tornadoes. during the winter, since the air is cooler in the midwest, there is not as much moisture in the air and cold fronts are not as severe. in summary, cold fronts produce narrow bands of clouds along the front that can produce stormy to severe weather.
what you learned about cold fronts:

• what causes air masses movement?
• what causes the warm air ahead of a cold front to rise?
• what kind of clouds usually form in a cold front?
• what wind direction change usually occurs as a cold front moves through an area?
• where do vertical shear winds form?
• what kind of weather is usually expected in a cold front?

the warm front:
when a warm air mass moves into an area of cooler air, a warm front will form as shown in figure 4. the warm air is less dense

Explanation:

Answer:

s are derived from the provided text about cold fronts.