Observation data nudging for improved weather forecasting

Abstract

This study focuses on the performance based comparison of simulations carried out using the two FDDA “nudging” schemes of WRF for a heavy rainfall event during August 6 to August 10, 2012. The results show that grid nudging overestimated the temperatures and underestimated the accumulated rainfall Observation nudging, on the other hand, improves short term weather forecasting. The error values relative to the actual observation for grid nudging were relatively high compared to the observation nudging for the two stations. The results also showed that observation nudging produced values closer to the observation data, and hence, offer promising results for future forecasting models.