Answer:
The main idea here is "A storm was coming."
Explanation:
The main idea in a paragraph is the central point of the paragraph, which expresses the most important thought about the topic. It is the topic sentence if stated clearly in the paragraph. Different authors locate the main idea in different places within a paragraph. The main idea is expressed as a sentence, and it is usually, but not always, the first sentence, with the rest of the paragraph supporting the main idea.
b) A storm, according to merriam webster online dictionary is defined as "a: a disturbance of the atmosphere marked by wind and usually by rain, snow, hail, sleet, or thunder and lightning. b: a heavy fall of rain, snow, or hail. c: wind having a speed of 64 to 72 miles (103 to 117 kilometers) per hour."