aerographer's mate
noun
aer·og·ra·pher's mate ˌer-ˈä-grə-fərz- 
: a navy petty officer specializing in meteorology
Word History
Etymology
aerographer "warrant officer charged with observing weather," from aerography "meteorology" (from aero- + -graphy) + -er entry 2
First Known Use
1947, in the meaning defined above