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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 >

Cooling continues into the holiday weekend, with high temperatures expected to be 5 to 10 degrees below normal by Sunday.
High temperatures throughout Central California on Sunday and Independence Day will be around 5 to 10 degrees below normal for this time of the year.
Temperatures will continue to cool through the holiday weekend. By the Independence Day Holiday, afternoon highs will be several degrees below normal. Here are probabilities of maximum temperatures remaining below 90 degrees for select locations in the San Joaquin Valley on Monday, July 4th, 2022.


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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.