National Weather Service United States Department of Commerce

Severe Weather and Excessive Rain in the Ohio and Tennessee Valley; Dangerous Heat in the South

Widespread strong to severe thunderstorms may produce large hail, damaging wind gusts, a few tornadoes, and flash flooding across parts of the lower Missouri Valley into the Ohio and Tennessee Valleys. Dangerous and potentially record-breaking heat continues across parts of Texas, the western Gulf Coast, southern Florida, and Puerto Rico. Read More >

Upper Air Observations


Decoded Upper Level Winds

Plotted Upper Air Soundings

GOES Derived Atmospheric Vertical Soundings

Alternate Sources for Upper Air Soundings
Ohio State

California Wind Profiler Data Can be Found Here

Why Do Forecasters Still Rely on Weather Balloons?

Twice every day, from nearly 100 locations in the United States, the National Weather Service launches weather balloons, carrying instrument packages called radiosondes. Radiosonde sensors measure upper-air conditions such as atmospheric pressure, temperature and humidity, wind speed and direction. The data is important for aviation safety, and meteorologists use radiosonde information to prepare weather forecasts.