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 >

Balloons are released by NWS Flagstaff meteorologists twice a day (around 4am and 4pm) to measure the pressure, temperature, dewpoint, and winds through the atmosphere. For more information about the NWS upper-air program and to learn how to read the plot below, click here.

Click here to view upper-air soundings from other areas around the continental United States.

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