|Expression in legends||Human impression||Effect for humans||Situation of indoors
|Situation of outdoors||Effect for a driver||Possibility of disaster|
|Drizzle||Ground gets wet|
|Slightly Strong||Sound audible||Splash wets footwear||Conversation disturbed||Puddles all around||Need to be cautious when it continues|
|Strong||Feel force or strength of rain||Umbrella works insufficiently||Clamorous sound of raindrops disturbs sleep, e.g. awakes more than half of sleepers.||Poor vision with fast wiper||Overflow from roadside gutters, wastewater drains or small streams
Occurrence of small-scale mudslide
|Rather Fierce||Feel like buckets of water poured over||Puddles make a road like a river||Risk for hydroplaning (Occurrence of water film between wheel and ground)||Mudslides or even landslides are prone.
Preparation for evacuation is necessary in dangerous zone.
Overflow from discharge pipelines in cities.
|Severe||Torrential||Umbrella is useless||White landscape and poor vision||Driving is dangerous||Rainwater runs into underground cells or shopping mall
Sprouts from manholes
Brings other disasters
|Extreme Severe||Feel fright with choking pressure||Large-scale disaster is possible.
Highest alert is needed.
Data quoted from Japan Meteorological Agency (Data as of August, 2000, revised in July,2002).
[ Notes ]
The table assumes the continuation of one-hour for each rainfall intensity.
|Heavy rain、Storm、Snow-storm、Heavy snow、High waves、Storm surge|
|Warning||Heavy rain、Flood、Storm、Snow-storm、Heavy snow、High waves、Storm surge|
|Advisory||Heavy rain、Flood、Gale、Gale and snow、Heavy snow、High waves、Storm surge、Thunderstorm、Snow melting、Dense fog、 Dry air、Avalanche、Low temperature、Frost、Ice accretion、Snow accretion|