Final answer:
The statement 'It will rain tomorrow' is a forecast related to weather, and such weather predictions often utilize environmental cues or scientific models. Literature provides vivid examples of how characters interpret these signs, and understanding the term 'weather' is important in English grammar.
Step-by-step explanation:
According to the provided context, the statement "It will rain tomorrow" is fundamentally a forecast about the weather. Examples from literature, like the mention of the purple cloud-bank that signaled an impending storm, or the passage describing the rain pounding on pavement, use imagery to describe the atmospheric conditions that precede a rainfall event, creating vivid scenes that illustrate how people or characters predict or react to the changes in weather.
Additionally, understanding the difference between 'weather' and 'whether' is important for English grammar; 'weather' is a noun describing the atmospheric conditions, while 'whether' is a conjunction for making comparisons or choices. Expressions of weather conditions are also used in figurative language, such as in poetry, where phrases like "soft rains" and "smell of the ground" evoke sensory experiences associated with rainfall.
Lastly, in our examples, characters like Bibi and Bobinôt observed the environment to anticipate rain, which demonstrates a basic human skill of interpreting natural signs for predicting weather. Furthermore, our understanding of weather has advanced with scientific models that help in forecasting future precipitation and storm events, as mentioned in the section on future precipitation.