Natural disasters as tropical cyclone, earth quake, flash flood, flooding, droughts landslide and thunderstorms are
dangerous for life, property and economics of Thailand in every year. This experiment is to study the thunderstorms
occurred in the Northeast of Thailand during 10-15 April 2008. This research performed experiment with the stability
atmosphere of K index from numerical weather prediction products. The experiments were conducted by Weather
Research Forecast (WRF) model version 3.0.1 to investigate the thunderstorms. The model runs with grid resolution
15-km and 28 levels in the vertical. The technique used K index consider property thunderstorm and in put data in the
data based of geography information system (GIS) to analyze. Results showed display four classify levels of risk area
of thunderstorms in a map: weak risk, moderate risk, strong risk and very strong risk. In finally, result showed a map of
province and communities in the risk thunderstorm area. It should be management and prevention of thunderstorms.