NWS Forecast Office Jacksonville, FL

Decreasing coverage of afternoon and evening thunderstorms this weekend will allow heat and humidity to build to dangerous levels. Inland high temperatures will soar to near 100 degrees, with heat index values climbing each day, reaching the 108-114 degree range by Sunday and Monday. Heat Advisories will likely be issued for Saturday across most of our area, and Extreme Heat Watches may be necessary by Sunday and Monday.