This document outlines a federal contract solicitation for Contract Weather Observer services. The Federal Aviation Administration is seeking to award eleven indefinite delivery/indefinite quantity contracts to small businesses to provide augmentation and backup services to Automated Surface Observing Systems as well as manual weather observations as necessary at selected airports nationwide. Responses are due by the date specified in the solicitation or any subsequent amendments and must include "FAA CWO SIR Response" and the company name in the email subject line. All questions must be submitted in writing to the contracting officer, Stacey Stanley, by close of business 12 calendar days after solicitation release. The principle NAICS code is 541990 for all other professional, scientific and technical services with a size standard of $16.5 million.