Question

How many days short-range weather forecasting is valid?

• A. 4
• B. 3
• C. 5
• D. 6

Hint:

Recall the standard durations: Short-range is \(<\) 3 days, Medium-range is 3--10 days, and Long-range is \(>\) 10 days.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Weather forecasting is vital for planning day-to-day agricultural operations, such as sowing, irrigation, pesticide application, and harvesting.
Meteorological agencies categorize weather forecasts based on their spatial and temporal validity ranges.

Step 2: Detailed Explanation:
The World Meteorological Organization (WMO) and the India Meteorological Department (IMD) classify weather forecasts into three primary categories based on duration:
1. Short-Range Forecast: Valid for a duration of up to 72 hours (which corresponds to 3 days). This is highly reliable for immediate decisions like spraying chemicals or irrigating crops.
2. Medium-Range Forecast: Valid for a duration of 3 to 10 days. This is crucial for choosing sowing times and anticipating rainfall events.
3. Long-Range (Seasonal) Forecast: Valid for periods extending beyond 10 days (e.g., monthly or seasonal monsoonal outlooks).
Because short-range forecasting is defined for up to 72 hours, its validity is officially 3 days.

Step 3: Final Answer:
Thus, short-range weather forecasting is valid for up to 3 days.