Simulation of Cyclone ‘Aila-2009’ by Using WRF-ARW Model and Numerical Storm Surge Model - Monitoring and Prediction of Tropical Cyclones in the Indian Ocean and Climate Change - page 262

Fig. 2: Aila affected areas of Bangladesh.
People of 15 coastal districts were affected (Fig. 2), 147 people were
killed and 2,30,208 houses were destroyed, 3,40,660 acres of standing crops
were damaged. The highest winds of 110 km/h (3-minute) and 120 km/h
(1-minute) were reported.
5. Results and Discussion
5.1 Wind and Rainfall Patterns
Figure 4 shows forecast wind and magnitude based on initial condition at 0000
UTC of 24 May 2005. A well organized cyclonic circulation with strong winds
encircling the centre is simulated by the model. Model-derived maximum wind
is about 30 m/s, which is confined to the right of the direction of the movement.
As per the observations, cyclone attained its highest intensity just before the
landfall with estimated maximum surface wind of approximately 34.2 m/s
(Fig. 3 (a)-(f)). A typical hook like structure protruding to north and south has
precipitation exceeding 35-40 mm/day.
5.2 Estimated Central Pressure (ECP) and
Maximum Wind Speed
In the present study, Estimated Central Pressure (ECP) and maximum sustained
wind of the cyclone Aila were taken from Colorado State University website
(http://rammb.cira.colostate.edu/products/tc_realtime). Comparison of satellite
observed and model ECP of cyclone Aila is shown in Fig. 4. Satellite-derived