National Weather Service United States Department of Commerce

Coastal and Marine Impacts from Imelda and Humberto as Both Track Away from the Southeast U.S.

Swells and high surf from both Imelda and Humberto are expected to bring dangerous marine and rip current conditions to the east coast of Florida and Georgia today, spreading north along much of the east coast of the U.S. this week. Heavy rainfall north and west of Imelda falling across coastal Florida and Georgia into the Carolinas could cause isolated flash and urban flooding through Tuesday. Read More >

Overview

A strong low pressure system tracked from the Southern Plains into the Ohio Valley going into the 25th with the surface low generally moving just north of the Ohio River during the late overnight hours and early daytime hours of January 25th. A surge of warm air pushed out ahead of the low leading to rain being the predominant precipitation type initially before a transition into a heavy wet snow. Snow to liquid ratios through the early portion of the event were around 3-5:1 but that was also due to the significant melting that occurred through the course of the entire event. A broad deformation band set up to the northwest of the surface low, but never quite tightened up to create the extreme snow rates that would have been needed to get the higher snow totals with the melting. Snow began to taper off after 11AM with little to no accumulations after due to melting.
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