Translation guide
JWA is an acronym for the Japan Weather Association. It is a proper noun referring to a specific organization, not a common word.
Referring to the organization by its English acronym
The full Japanese name of the Japan Weather Association. Use this in formal or official contexts.
日本気象協会が発表した天気予報によると、明日は雨です。
According to the weather forecast issued by the Japan Weather Association, it will rain tomorrow.
The English acronym is sometimes used in Japanese, especially in written or technical contexts, but it is less common than the full name.
JWAのデータを参照してください。
Please refer to the JWA data.
While JWA is understood in some contexts, using the full Japanese name 日本気象協会 is more natural and clear in most situations.