Nowcasting: A) is not very useful for predicting thunderstorms ...

[penza]

Nowcasting:
 
  A) is not very useful for predicting thunderstorms and tornadoes.
  B) is primarily used for making long-range forecasts for large regions.
  C) makes extensive use of radar and geostationary satellites.
  D) makes little use of numerical data.

Question 2

Why do tornadoes have such high wind speeds?
 
  What will be an ideal response?

[Kdiggy]

Answer to Question 1

C

Answer to Question 2

The high wind speed of tornadoes is directly related to the extremely low pressures in the center of the vortex. Pressures within some tornadoes have been estimated to be as much as 10 percent lower than immediately outside the storm. Drawn by the much lower pressure in the center of the vortex, air near the ground rushes into the tornado from all directions. As the air streams inward, it is spiraled upward around the core until it eventually merges with the airflow of the parent thunderstorm deep in the cumulonimbus tower. Because of the tremendous pressure gradient associated with a strong tornado, maximum winds can sometimes approach 480 kilometers (300 miles) per hour.