When Did Hurricane Irma Form
Hurricane Irma developed as a tropical storm on August 30, 2017, east of the Cape Verde Islands. It strengthened rapidly into a major hurricane within days.
When Did Hurricane Irma Peak
Irma reached Category 5 intensity on September 5, 2017, with maximum sustained winds near 185 mph. It maintained this strength for multiple days, a record for Atlantic hurricanes.
When Did Hurricane Irma Make Landfall
Irma made landfall in the Florida Keys on September 10, 2017, as a Category 4 hurricane. It later moved inland along the Florida Gulf Coast before weakening and moving northward.
For a detailed timeline of warnings, watches, and impacts, see the official National Hurricane Center summary at National Hurricane Center Tropical Cyclone Reports.
