south·west·er 
(south-wĕstər, sou-wĕs-) also sou'·west·er (sou-wĕs-)
(south-wĕstər, sou-wĕs-) also sou'·west·er (sou-wĕs-)n.
1. A storm or gale blowing from the southwest.
2. A waterproof hat of material such as plastic, oilskin, or canvas, with a broad brim behind to protect the neck.