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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 very heavy and wet snow fell across Central Pennsylvania during the daytime on Thursday the 15th and all night into Friday the 16th of October, 2009.

This storm was noteworthy for two reasons:
1) This storm made the earliest measurable snow of any winter season on record in many places.
2) This storm produced a large amount of damage to trees (which also downed power and telephone lines) across much of the northern mountains and even down into State College.

An upper trough digging southward into the eastern U.S. from the Great Lakes helped to enhance a surface low forming over the Gulf Coast States - eventually spinning the storm up off the the North Carolina coast. The storm center then traveled toward Cape Cod and pulled a great amount of moisture into the mountains from the ocean.

Enough cold air was in place for the moisture to fall as snow over the central and northern mountains, but mainly rain in the southern third to half of the state.

Image Image
Co-Operative Observer Snowfall from Thursday morning (15th) to Friday Morning (16th). Surface Map from the morning of the 15th - with developing low off the Carolina Coast.
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