Right now
The most recent data we hold from JTWC arrived 2 days ago, and this point is in it.
Nothing else has been detected within 20 km in the last 24 hours.
Reported by JTWC today.
It is one of only 2 we have recorded within 20 km of this point since 30 September 2026. The last comparable one was on 30 September 2026. One more was recorded here in the fortnight before it.
What the source measured
JTWC reported: Tropical Storm Choi-Wan (26W), JTWC warning 8. Max sustained winds 50 kt (1-minute average), near 16.9N 145.1E at 011800Z.
This is the highest wind speed we have recorded at this point, over 8 readings since 30 September 2026 — the previous range was 25 kt to 50 kt.
How we know
2 recorded sources include JTWC; independence is not established by this count.
Our own score for this event is 11 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.
Event Data
| Type | Cyclone |
| Severity | Medium |
| Calamity Score (ours) | 11 / 100 |
| Legacy data-support index | 0.55/1 |
| Coordinates | 16.9000, 145.1000 |
| Nearest City | Saipan (200 km) |
| Urban exposure index (PEI) | 0 within 100 km |
| Impact Tier | minor |
| Timestamp | 2026-10-01T18:00:00.000Z |
| Source | https://www.metoc.navy.mil/jtwc/products/wp2626web.txt |
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: jtwc. Occurrence: 2026-10-01T18:00:00.000Z.
First archived: 2026-09-30T02:17:52.795Z. Material modification: 2026-10-01T20:22:37.682Z.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
2026-10-01T17:16:38.420Z · data_change
Severity low → medium.
19 retained revisions changed source fields this page does not show; the index, severity and version stayed the same.
Score Breakdown
Technical Details
| Name | Choi-Wan |
| StormId | WP262026 |
| Basin | wp |
| WarningNumber | 8 |
| FinalWarning | false |
| WindKts | 50 |
| WindSpeedKt | 50 |
| WindMph | 58 |
| WindAveraging | 1-minute |
| TypeLabel | Tropical Storm |
| Eonet Category | Severe Storms |
| Eonet MagnitudeValue | 50 |
| Eonet MagnitudeUnit | kts |
| Eonet WindSpeedKt | 50 |
| Eonet GeometryCount | 5 |
| Eonet EonetId | EONET_24962 |
| MergedSources | [{"id":"eonet_EONET_24962","source":"eonet","severity":"medium","severityValue":38,"timestamp":1790856000000,"latitude":16.5,"longitude":145.8}] |
Safety Information
During a tropical cyclone: shelter in a sturdy interior room away from windows. Stock emergency supplies including water, food, medications, and flashlights. Do not venture outdoors during the eye of the storm. After passage, beware of downed power lines, flooding, and structural damage. Follow official guidance for evacuation and shelter.
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.
Review the area, threshold and delivery channel in your account.
Want to know when something happens in this area?