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 May 17,2012 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 － 50 139 - 100 174 Chuo 30 － 154 70 - - Minato 30 － 123 50 - 154 Shinjuku 25 － 138 40 - 173 Bunkyo 25 － 134 40 - 168 Shinagawa 25 － 123 45 - 154 Meguro 25 － 123 50 - 154 Oota 25 － 123 50 - 154 Setagaya 30 － 120 60 - 151 Shibuya 25 － 133 50 - 167 Nakano 25 － 139 40 - 174 Suginami 30 － 131 60 - 164 Toshima 25 － 138 50 - 173 Kita － 40 123 - 70 154 Itabashi 30 － 124 45 - 155 Nerima 30 － 132 60 - 165 23 Wards East Taito 30 － 134 50 - 168 Sumida 40 － 154 60 - - Koto 30
(Not-Flat Ground)60
(Flat Ground)154 60
(Not-Flat Ground)110
(Flat Ground)- Arakawa 30 － 134 50 - 168 Adachi － 70 154 - 100 - Katsushika 30 － 154 50 - - Edogawa 40
(Flat Ground)60
(Not-Flat Ground)154 60
(Flat Ground)110
(Not-Flat Ground)- Tama North Tachikawa 30 － 136 45 - 161 Musashino 25 － 144 50 - - Mitaka 30 － 139 50 - 164 Fuchu 30 － 144 60 - 170 Akishima 30 － 136 50 - 161 Cyofu 40 － 139 70 - 164 Koganei 30 － 141 50 - 167 Kodaira 25 － 141 45 - 167 Higashimurayama 20 － 144 40 - 170 Kokubunji 25 － 144 50 - 170 Kunitachi 30 － 150 70 - 177 Komae 30 － 150 60 - - Higashiyamato 30 － 144 50 - 170 Kiyose 40 － 141 60 - 167 Higashikurume 20 － 141 45 - 167 Musashimurayama 40 － 111 70 - 131 Nishitokyo 20 － 141 40 - 167 Tama West Oume 50 － 128 70 - 151 Fussa 50 － 120 70 - 142 Hamura 50 － 134 70 - 158 Akiruno 50 － 120 70 - 142 Mizuho 50
(Flat Ground)70
(Not-Flat Ground)134 90
(Flat Ground)120
(Not-Flat Ground)158 Hinode 40 － 123 70 - 145 Hinohara 50 － 124 70 - 147 Okutama 50 － 124 70 - 147 Tama South Hachiouji 40 － 104 60 - 131 Machida 40 － 107 60 - 134 Hino 30 － 112 50 - 141 Tama 30 － 117 50 - 147 Inagi 30 － 117 50 - 147 *Soil Tank Index shows rain amount tanked in soil.
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