Windows in Missouri take wind-driven rain, humid summers that swell wood, and hail that spiders glass on the western open side. Those are different failures. A cracked lite is not a rotten sill, and a rotten sill is not fog between panes. Fog means the seal is done. A meeting rail that whistles in January is a heat leak. A sash that sticks in July is moisture. Say which one you have before the call becomes every window.
Brick openings leak beside the frame as often as through the glass. Look for stained plaster at the corners. Storms that do not sit tight rattle and trap water on the wood. A replacement that ignores a thick masonry joint will leak in the next gully-washer even if the glass is fine. Ranch flanges and wraps are a different detail. Divided lites on an older facade may be something you mean to keep.
Say which wall faces the weather. West walls take hail and wind. Walls toward a creek or a river take the driving rain. North walls show the draft. A bedroom that must open is more urgent than a fogged stair light. Cords, locks, and one pane can be the whole job if the frame is solid. Hardware can wait. A hole you can feel cannot.
Count the openings that failed, not the whole house. If hail marked the gutter and the glass, keep them as two facts. If only the casing is wet after hard rain, say casing. Paint will not stop water already behind the stool. Interior trim and exterior wrap change how the wall looks when the work is done. On a crawl-space house, the window may be the wet wall that is also feeding the pests below.
Lead with the town and the wall. Draft, leak, fog, or broken glass is enough. Call the number on this page.