Met Forecast

BY Gp Capt (Dr) B Nandi The very essence of weather forecasting lies in identifying areas of vertical upward motion. Which in turn when moisture is present produces clouds and different types of clouds produce different kinds of weather like drizzle, rain, shower, thundershower with hail or without hail, squall line, MCC etc. 2. Methodology…

By Gp Capt  (Dr) B Nandi 1. Encyclopedia Britannica provides a typical thunderstorm image. Worthy to note the Dumbbell like structure or human waist structure. Large latent heat liberation takes place at the cloud base due to the first condensation of convective air. These latent heat liberation makes the base broad. There after latent heat…

During the second half of July 2024 and first week of August saw quite high temperature over Leh arfield. This high temperature over the already rarified atmosphere created problem for aircraft operations. Maximum temperatures are shown belowon the graph from 16July2024 to 07Aug2024. Thehighest temperature 370C was seen on 29th July2024. we like to study…

BY Gp Capt (Dr) B Nandi 1. Introduction Tibetan plateau has enormous impact on the weather pattern over Asia. We need to understand its role in influencing the weather so that we can forecast weather better. It towers over southwestern China at an average elevation of 4000 m above sea level and is known as “the…

by Gp Capt (Dr) B Nandi 1. Introduction We start by introducing the basic wind in meteorology known as geostrophic wind and then by introducing anticyclonic curvature we like to explore various properties of an anticyclone. Next step will be to go over the genesis of different types of anticyclone, gradually. 2. Geostrophic Wind Where…

By Gp Capt (Dr) B Nandi 1. Vorticity and its relationship with divergence is best understood by Vorticity equation.one can refer any text book on Dynamic Meteorology. In cartesian coordinate (x,y,z) can be written as follows η denotes absolute vorticity. ζ denoes relative vorticity. f is the coriolos parameter. u,v and w are the component…

By Gp Capt (Dr) B Nandi 1.Introduction In modern era winds are derived from cloud motion vector, especially over data sparse area. One of the methods is to use Water Vapour (WV) Channel Satellite information, especially for upper troposphere. So, there is no wonder to expect a good correlation between WV satellite image and upper…

By Gp Capt (Dr) B Nandi Simplified horizontal/ two dimensional motion can be described by the following equation. Where V is the wind velocity, f Coriolis parameter, ρ air density, P pressure. k vertical unit vector. First term is acceleration of air parcel, second term is Coriolis force and third term is pressure gradient force….