Heavy Rainfall for Portions of Coastal Texas; Fire Weather Concerns for Alaska

A tropical disturbance off the Texas coast will bring the threat for some heavy rainfall through Friday. Meanwhile, monsoonal moisture flows into the Southwest and southern Rockies where flash flood threat will increase. Severe thunderstorms are expected across the Upper Midwest and western Great Lakes today. Dry and warm conditions for interior Alaska as fire weather concerns continue. Read More >

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Cooling Trend

Below Normal Temps

July 4th Temp Probs

Cooling continues into the holiday weekend, with high temperatures expected to be 5 to 10 degrees below normal by Sunday.

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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.