Which one of the following meterological condition is not shown in Indian daily weather map ?

Question

Accepted Answer

The correct answer is Option 1: Isotherms. Here's why:

*   **Why Isotherms (Option 1) are NOT typically shown on Indian daily weather maps:** Isotherms represent lines of equal temperature. While temperature data is crucial for weather analysis, daily weather maps in India (and many other regions) prioritize showing the *distribution of pressure* and *wind patterns* as these are more directly related to immediate weather phenomena like rainfall, storms, and overall atmospheric circulation. Isotherms are more commonly found on climatological maps or specialized weather charts focusing on temperature variations over larger areas and longer time scales. Daily weather maps focus on the current, immediate weather situation.

*   **Why Isobars (Option 2) ARE shown on Indian daily weather maps:** Isobars are lines connecting points of equal atmospheric pressure. They are fundamental to understanding weather systems. The spacing and pattern of isobars indicate the strength and direction of the pressure gradient force, which drives wind. High and low-pressure areas, crucial for forecasting, are identified using isobars.

*   **Why Sky Condition (Option 3) IS shown on Indian daily weather maps:** Sky condition (e.g., clear, partly cloudy, overcast) is a direct observation of the current weather. It's a vital piece of information for the public and for aviation. Symbols representing sky cover are routinely included on daily weather maps.

*   **Why Wind Direction (Option 4) IS shown on Indian daily weather maps:** Wind direction is a key element of weather information. It indicates the source of the air mass affecting a region and is directly related to pressure patterns. Wind barbs or arrows are commonly used on weather maps to show wind direction and speed.