National Weather Service United States Department of Commerce

Clear and Cooler Temperatures Across Much of the Eastern U.S.; Heavy Rain in Florida

A high pressure system is bringing mostly clear skies and cooler temperatures across much of the eastern U.S. to the Mid-South. A stationary front will produce thunderstorms and heavy rain across the Florida Peninsula to the immediate Southeastern coast. Severe thunderstorms are possible across portions of the central and southern Plains. 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.