Rainfall

The latest practices followed are summarised below:
Spatial Distribution of Rainfall

Distribution	No. of Places	Description
Isolated	One or two Places	<25% of stations gets rainfall
Scattered	At a few Places	(26–50)% of stations gets rainfall
Fairly Widespread	At many Places	(51–75)% of stations gets rainfall
Wide spread	At Most place	(76–100)% of stations gets rainfall
Dry	-	No station reported rainfall

Intensity of Rainfall

Descriptive Term used	Rainfall amount in mms
No Rain	0.0
Very light Rain	0.1- 2.4
Light Rain	2.5 – 7.5
Moderate Rain	7.6 – 35.5
Rather Heavy	35.6 – 64.4
Heavy Rain	64.5 – 124.4
Very Heavy Rain	124.5 – 244.4
Extremely Heavy Rain	>244.5
Exceptionally Heavy Rain	When the amount is a value near about the highest recorded rainfall at or near the station for the month or season. However, this term will be used only when the actual rainfall amount exceeds 12 cm.

Weekly/Seasonal Rainfall Distribution on regional scale
Excess: Percentage departure of realised rainfall from normal rainfall is + 20% or more.
Normal: Percentage departure of realised rainfall from normal rainfall is between - 19 % to + 19 %.
Deficient: Percentage departure of realised rainfall from normal rainfall is between – 20 % to - 59 %.
Scanty: Percentage departure of realised rainfall from normal rainfall is between – 60 % to - 99 %.
No rain: Percentage departure of realised rainfall from normal rainfall is– 100 %