When Washington wrote to James Madison what did he mean by the impending storm?

When George Washington referred to the "impending storm" in his correspondence with James Madison, he was alluding to the growing political divisions and tensions within the young United States, particularly between federalists and anti-federalists. This metaphor captured his concern about the potential for conflict and instability arising from these factions, which he believed could threaten the unity and survival of the nation. Washington sought to convey the urgency of addressing these divisions to preserve the republic.