National Weather Service United States Department of Commerce

Soggy in the Pacific Northwest; Cool and Snowy in the Northeast

Periods of heavy rain on top of already saturated soils will lead to additional flooding and continued threats of landslides across western Washington. A series of weather systems originating in Canada will produce areas of snow and lake effect snow across the Great Lakes and Northeast. Santa Ana winds will warm southern California and keep fire weather threats elevated. Read More >

 

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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.