storm
颶 centers on a violent windstorm, specifically a typhoon or hurricane. The single given meaning 'storm' is understood as a powerful wind event.
颶 combines 風 (wind) with 具, which likely provides the sound. The character is used for a violent windstorm, and the phono-semantic structure is typical for such weather terms.
The wind radical 風 wraps around 具, like a tool or implement caught in a fierce storm. Picture a piece of equipment being tossed by hurricane-force winds.
For グ, imagine a huge gust of wind going 'goo' as it howls through the storm: goo -> グ, and the wind enclosure 風 reinforces the stormy scene.
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tornado; hurricane; typhoon