National Weather Service United States Department of Commerce

Severe Thunderstorm Threat From the Central Plains to the Northeast; Extreme HeatRisk for the East Coast

Strong to severe thunderstorms are possible from the central Plains to the Northeast through this evening. Widespread damaging winds are the primary threat but hail and a tornado or two is also possible. Extremely dangerous heat continues across the Eastern U.S. Warm overnight low temperatures will provide little to no relief. Read More >

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SKYWARN® Basics (pdf)

SKYWARN® Flood (pdf)  -- Updated for 2020!

SKYWARN® Convection (pdf)

SKYWARN® Winter (pdf) Updated for 2019

SKYWARN® Tropical (pdf) - Updated for 2021