We found 2 dictionaries that define the word upper trough:

Computing (1 matching dictionary)

1. upper trough: Encyclopedia

Tech (1 matching dictionary)

2. Glossary of Meteorology (No longer online)

Phrases: Tropical upper tropospheric trough, more... ▸ Words similar to upper trough ▸ Usage examples for upper trough ▸ Idioms related to upper trough ▸ Wikipedia articles (New!) ▸ Words that often appear near upper trough ▸ Rhymes of upper trough ▸ Invented words related to upper trough