Meanings of remained thick in English

The storm had passed, but the atmosphere remained thick and humid.

It remained thick weather all that afternoon, night, and succeeding day, until about noon.

Ferral's eyes darted from Ruamsantiah to me to the stick, which remained thick and black on the table.

His black hair had just a few flecks of grey but remained thick and wavy and his fingernails were perfectly manicured.

The weather remained thick and squally, often intercepting the view; and the wind continued to shift until towards noon, when it settled at north-east.