Here are is where to find live, interactive radar and traffic maps on KCRA.com to help keep you prepared during weather ...

MAPS: Track Doppler radar and traffic for California rain and snow Follow the storms with interactive radar and see the latest traffic conditions. Updated: 7:02 AM PST Mar 2, 2025 ...

The Doppler effect, which detects energy pulses, was discovered by Austrian physicist Christian Doppler and named after him.. Doppler radar is “a remote sensing tool, which basically means it ...

Doppler radar is “a remote sensing tool, which basically means it senses things in the atmosphere,” said Sara Purdue, a meteorologist with the National Weather Service in Sacramento.

The power of the returning signals lets experts create a picture of size, shape and intensity of any precipitation—and this is what you see on a phone app’s radar map or a TV broadcast.

“Bottom line, metagenomics is a great way to build an early-warning radar,” he said. In the future, he said, doctors and scientists may routinely use the technology to watch for both new and ...