How did he do that?

Exodus 14:21 says, “And Moses stretched out his hand over the sea; and the LORD caused the sea to go back by a strong east wind all that night, and made the sea dry land, and the waters were divided.

14:22 And the children of Israel went into the midst of the sea upon the dry ground: and the waters were a wall unto them on their right hand, and on their left.”  Wouldn’t that take wind from both the east and the west?  Wind blowing one direction would only produce one wall.