Definitions for "White squall"
a violent tropical or subtropical storm that stirs up the surface of the sea into whitecaps, but is limited to a very localized area, often with no storm clouds present
A sudden, strong gust of wind coming up without warning, noted by whitecaps or white, broken water; usually seen in whirlwind form in clear weather in the tropics.
A sudden squall in tropical or subtropical waters; it is so called because the usual squall cloud is absent, thus, the only warning of its approach is the whiteness of a line of broken water or whitecaps. This may represent the outflow of a convective system that has recently dissipated.