weather September 24, 2024 4:52 pm National Weather Service upgrades its radar systems In order to keep up with the atmosphere, the National Weather Service recently completed an upgrade to its weather radars. Meteorologist Vianey Arana reports. US & World Videos 2:40 Forecast: Significant heat ahead and fire danger 2:54 Cinthia's forecast: Bracing for heat for the Bay Area 2:49 Forecast: Slight weekend cooling, heat returns next week 2:34 Forecast: significant heat ahead 2:57 Cinthia's forecast: Mild weekend, heat ahead