Typhoon Koguma
Right now
The most recent data we hold from Japan Meteorological Agency (RSMC Tokyo – Typhoon Center) arrived 4 hours ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
Reported by Japan Meteorological Agency (RSMC Tokyo – Typhoon Center) 3 days ago.
It is the only one we have recorded within 20 km of this point since 8 October 2026.
What the source measured
Japan Meteorological Agency (RSMC Tokyo – Typhoon Center) reported: 台風解析・予報情報
This is the highest wind speed we have recorded at this point, over 8 readings since 8 October 2026 — the previous range was 55 kt to 75 kt.
How we know
3 recorded sources include Japan Meteorological Agency (RSMC Tokyo – Typhoon Center); independence is not established by this count.
Our own score for this event is 18 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
Computed under scoring rules v5. Rows carrying other versions were judged by different rules and are not directly comparable.
Series begins 8 March 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Event data
| Type | Cyclone |
| Severity | High |
| Calamity Score (ours) | 18 / 100 |
| Legacy data-support index | 0.72/1 |
| Coordinates | 18.2000, 157.1000 |
| Nearest city | Saipan (1253 km) |
| Urban exposure index (PEI) | 0 within 150 km |
| Impact tier | minor |
| Timestamp | 2026-10-08T21:00:00.000Z |
| Source | https://www.data.jma.go.jp/developer/xml/data/20261008220346_0_VPTW61_010000.xml |
| Licence | Public Data License 1.0 (compatible with CC BY 4.0) · Japan Meteorological Agency (RSMC Tokyo – Typhoon Center) · Fields extracted from the analysis and forecast of the RSMC Tokyo – Typhoon Center; class names translated, and the severity band assigned, by Calamity.live. Not a JMA product. |
Physical priority index · v5. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: jma_typhoon. Occurrence: 2026-10-08T21:00:00.000Z.
First archived: 2026-10-08T01:26:39.756Z. Material modification: 2026-10-08T22:12:44.836Z.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
2026-10-08T13:37:02.903Z · data change
Index 11 → 18; severity Medium → High.
15 retained revisions changed source fields this page does not show; the index, severity and version stayed the same.
Score breakdown
Technical details
| Licence | Public Data License 1.0 (compatible with CC BY 4.0) |
| LicenceUrl | https://www.jma.go.jp/jma/en/copyright.html |
| Attribution | Japan Meteorological Agency (RSMC Tokyo – Typhoon Center) |
| Language | ja |
| Name | Koguma |
| TypeLabel | Typhoon |
| JmaClass | 台風(TY) |
| JmaIntensityClass | 強い |
| JmaEventId | TC2634 |
| TyphoonNumber | 2629 |
| WindKt | 75 |
| GustKt | 105 |
| Pressure | 970 |
| MovementDirectionLocal | 西北西 |
| MovementKmh | 25 |
| LocationLocal | 南鳥島近海 |
| AnalysisAt | 2026-10-08T21:00:00.000Z |
| ReportedAt | 2026-10-09T07:05:00+09:00 |
| SenderName | 気象庁 |
| DocumentUrl | https://www.data.jma.go.jp/developer/xml/data/20261008220346_0_VPTW61_010000.xml |
Safety information
What to do in a tropical cyclone
Three things first, then how little water it takes, and what to do before, during and after. From FEMA’s Ready.gov and the US National Hurricane Center.
For this reportCyclone
Leave if you are told to
If you live in an evacuation zone and authorities order it, go at once. Water kills most: storm surge, the sea pushed ashore, and flooding rain.
Ready.gov · NHCShelter in an inner room
Away from windows, on the lowest floor that will not flood. If water rises, go up, never into a closed attic.
Ready.govStay in when the wind drops
The calm of the eye can last minutes before the wind returns from the other side.
Ready.gov · NHC
It takes very little moving water
Moving water. Figures from the US National Weather Service, “Turn Around Don’t Drown”. Person, car and water are drawn to the same scale.
Before, during, after. Here it is “after”.
Before · When a cyclone is forecast
Know your evacuation zone
And the route out of it.
Prepare the house
Bring in outdoor furniture, clear gutters, protect windows.
Supplies for several days
Water, food, medicines, torches, batteries, phone chargers.
Help your neighbours
Especially older people and those who need assistance.
Ready.gov (FEMA)
During · While the storm passes
Stay indoors
Inner room, away from windows.
Never into floodwater
Fifteen centimetres of moving water can knock you down, thirty can carry your car.
Keep listening
Official alerts and local radio.
Ready.gov (FEMA)
After · When the storm has passed
Keep away from power lines
And from anything touching them.
Generators outdoors only
Their fumes kill indoors.
Avoid floodwater
It can carry sewage, chemicals and electricity.
Messages, not calls
Keep lines free for emergencies.
Ready.gov (FEMA)
If a life is in danger
Call your local emergency number
Questions people ask
What is storm surge?
The sea pushed onto land by the storm’s wind. It is often the greatest threat to life in a tropical cyclone, and can flood far inland. Source: US National Hurricane Center.
Cyclone, hurricane, typhoon: what is the difference?
The same storm with different names by ocean: hurricane in the Atlantic and north-east Pacific, typhoon in the north-west Pacific, cyclone in the Indian Ocean and South Pacific.
Is the calm in the middle the end?
No. It is the eye; the wind returns from the opposite side, often as strong. Stay indoors. Source: Ready.gov (FEMA).
Review the area, threshold and delivery channel in your account.