The sky cleared. And Pharaoh immediately went back on his word.
The Targum Pseudo-Jonathan on Exodus 9:34, the Aramaic paraphrase preserved in the tradition of Yonatan ben Uzziel, records the betrayal: "Pharoh saw that the rain and hail and the thunders of the curse had ended, and he added to sin, and made strong the design of his heart, both he and his servants."
V'osef l'mechtei — he added to sin. The Targumist's phrasing is almost clinical. It is not just that he refused to release Israel. He piled a new sin on top of the old one. His confession from the storm, "This time I have sinned," became another lie the moment the lie became survivable.
And notice: his servants joined him. The Targum makes the hardening collective. The court that had watched Pharaoh tremble now watched him recover, and they recovered with him. A regime that built itself on denial cannot let any one member admit the truth for long without bringing everyone down.
The Maggid teaches: repentance proved false is worse than no repentance at all. The hail had offered Pharaoh a chance to be remembered as the king who finally bent. By withdrawing his words the moment the pressure lifted, he became the king whose heart closed an extra chamber tighter than before.