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Local Las Vegas Valley breaking news from Nevada's most reliable source. Read about the latest updates happening in your region at Las Vegas Review-Journal.

Las Vegas weather forecasting not full of hot air, but helium

Every day at 4 a.m. and 4 p.m., a National Weather Service staffer in Las Vegas office launches a weather balloon into the sky, providing a vertical snapshot of the atmosphere that meteorologists can’t get from instruments on the ground.