Tokyo Amesh
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The update may halt temporalily due to radar maintenance or other inspection. - Legends
- Discriptions in the table below refer to the situation on the ground as generalized image for each rainfall intensity.
It should be noted that radar meaures the intensity high above the ground, which is not necessarily consistent with the intensity low on the ground.Expression in legends Human impression Effect for humans Situation of indoors
(wooden house)Situation of outdoors Effect for a driver Possibility of disaster Weak Ground gets wet Moderate Puddles sparsely 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 mudslideRather 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.Fierce Bitter fierce 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 disastersSevere 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.- The degree of disater varies with conditions of initial intensity or topological feature.
- The descriptions are based on recent cases.. Alteration should be done for deviation from actual situation.
displays JR Lines in the map. - Weather Warnings and Advisories
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Japan Meteorological Agency issues hevy rain warnings/advisories to call attention or precaution expecting damage possible.
The 1 hour rainfall amount, the 3 hours rainfall amount and the tanked rain amount in soil are used to judge them.
The standard for Tokyo Metropolitan Area is shown below.
[Standard for weather warnings/advisories for Tokyo] Revised on July 1,2009 Area Municipality Heavy rain advisories JMA issues heavy rain advisories, expecting a possibility of damage. The standard is as follows.
Heavy rain warnings JMA issues heavy rain warnings, expecting a possibility of grave damage. The standard is as follows.
1 hour
rain amount
[mm]3 hours
rain amount
[mm]Soil Tank
Index*1 hour
rain amount
[mm]3 hours
rain amount
[mm]Soil Tank
Index*23 Wards West Chiyoda 30 70 139 - 100 174 Chuo 154 70 - - Minato 123 50 - 154 Shinjuku 138 50 - 173 Bunkyo 134 50 - 168 Shinagawa 123 50 - 154 Meguro 123 50 - 154 Oota 123 50 - 154 Setagaya 120 60 - 151 Shibuya 133 50 - 167 Nakano 139 50 - 174 Suginami 131 60 - 164 Toshima 138 50 - 173 Kita 123 - 90 154 Itabashi 124 50 - 155 Nerima 132 60 - 165 23 Wards East Taito 30 70 134 50 - 168 Sumida 154 60 - - Koto 154 60
(Not-Flat Ground)110
(Flat Ground)- Arakawa 134 50 - 168 Adachi 154 - 100 - Katsushika 154 50 - - Edogawa 154 70
(Flat Ground)110
(Not-Flat Ground)- Tama North Tachikawa 30 70 136 70 - 161 Musashino 144 50 - - Mitaka 139 50 - 164 Fuchu 144 60 - 170 Akishima 136 90 - 161 Cyofu 139 70 - 164 Koganei 141 50 - 167 Kodaira 141 90 - 167 Higashimurayama 144 50 - 170 Kokubunji 144 50 - 170 Kunitachi 150 70 - 177 Komae 150 60 - - Higashiyamato 144 50 - 170 Kiyose 141 60 - 167 Higashikurume 141 70 - 167 Musashimurayama 111 70 - 131 Nishitokyo 141 50 - 167 Tama West Oume 50 90 128 70 - 151 Fussa 120 70 - 142 Hamura 134 70 - 158 Akiruno 120 70 - 142 Mizuho 134 70
(Flat Ground)120
(Not-Flat Ground)158 Hinode 123 70 - 145 Hinohara 124 70 - 147 Okutama 124 70 - 147 Tama South Hachiouji 30 70 104 60 - 131 Machida 107 60 - 134 Hino 112 50 - 141 Tama 117 50 - 147 Inagi 117 50 - 147 *Soil Tank Index shows rain amount tanked in soil.
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