Which word best completes the thought: "We expect these ____________ conditions to continue for at least another 24 hours before things calm down a bit."?

The correct answer is "stormy," which functions as an adjective in this context. Adjectives describe or modify nouns, providing additional information about them. In the sentence, "conditions" is the noun being described. Therefore, using "stormy" effectively communicates that the conditions are characterized by storms.

The other options do not fit grammatically or contextually. "Storm" is a noun and would not work to modify "conditions." “Storming” is a present participle, which implies ongoing action but does not properly describe the noun in this context. “Stormed” is the past tense form of the verb and would not appropriately modify “conditions” either. Thus, "stormy" is the only adjective that correctly completes the thought in a grammatically and contextually appropriate way.