How the National Weather Service forecasts tornadoes
This is western Pennsylvania's most active start to severe weather since 2002.
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This is western Pennsylvania's most active start to severe weather since 2002.
Amid heavy rainfall Thursday evening, a flash flood warning from the National Weather Service was issued for several counties in western Pennsylvania.
Pittsburgh's Action News 4 is providing live reports from Erie, which is in the path of totality, and Pittsburgh, to bring you everything you need to know.
A tornado watch was issued by the National Weather Service for Allegheny, Beaver, Greene and Washington counties.
Tuesday will be a severe weather alert day in Western Pennsylvania. Flooding issues were already being seen in Greene County on Monday.