On August 8th, a tropical wave moved offshore western Africa into the North Atlantic Ocean. Moving initially northward, a tropical depression formed southwest of Sal in Cabo Verde on the 11th and turned west. The system remained steady state for days before deep convection became more concentrated and organized, with Erin becoming a tropical storm on the 14th, a hurricane on the 15th, and a major hurricane on the 16th. Erin had begun to recurve, with the hurricane moving east of the Bahamas on the 18th. On the 20th, Erin was moving well offshore and parallel to NC while weakening. Baroclinic interaction led to Erin's extratropical transition while still hurricane-force on the 22nd while moving east-northeast to the south of Sable Island, Nova Scotia. From late on the 24th into the 26th, Erin looped south of Iceland before merging with another extratropical cyclone on the 27th.
The graphics below show the storm total rainfall for Erin, which used rain gage information from the National Weather Service Forecast Office in San Juan/xMACIS2 and CoCoRAHS.
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