The challenge was to find the problem with the following sentence:
A beautiful high-pressure day of frosty crystalline air, blue skies, and brilliant sunshine.
Danielo wrote, “I would say that it lacks a predicate clause.”
That’s right. A sentence contains a subject (a noun or pronoun, with or without adjectives) and a predicate (a verb, with or without an object and/or adverbs). The example above is simply a long and elaborate clause consisting primarily of nouns (day, air, skies, sunshine) and adjectives (beautiful, high-pressure, frosty, crystalline, blue, brilliant). It doesn’t qualify as a sentence because there is no predicate, no verb, no action. This beautiful clause just sits there.
To fix it, treat the clause as a subject by adding a predicate to the end:
A beautiful high-pressure day of frosty crystalline air, blue skies, and brilliant sunshine greeted her the next morning.
Another option is to attach a subject and predicate to the beginning of the clause:
It was a beautiful high-pressure day of frosty crystalline air, blue skies, and brilliant sunshine.