Typhoon Choi-Wan Tracker
The track shows Choi-Wan's path and the forecast cone.
Typhoon Choi-Wan is over open water at 22.1°N, 147.1°E, moving north at 17 km/h.
Choi-Wan observation history
| Date, time | Wind Speed | Pressure | Latitude | Longitude | Movement | Status |
|---|---|---|---|---|---|---|
| 204 kmh | 942 mb | 22.1 | 147.1 | 17 kmh N | Typhoon | |
| 176 kmh | 955 mb | 20.8 | 146.7 | 15 kmh NE | Typhoon | |
| 167 kmh | 961 mb | 20.3 | 146.2 | 15 kmh NE | Typhoon | |
| 148 kmh | 969 mb | 19.4 | 145.9 | 13 kmh NE | Typhoon | |
| 157 kmh | 969 mb | 18.6 | 145.3 | 11 kmh NE | Typhoon | |
| 139 kmh | 978 mb | 18.1 | 144.7 | 7 kmh N | Typhoon | |
| 130 kmh | 981 mb | 17.7 | 144.6 | 7 kmh NW | Typhoon | |
| 111 kmh | 987 mb | 16.9 | 144.6 | 7 kmh W | Tropical Storm | |
| 102 kmh | 992 mb | 17.0 | 144.7 | 13 kmh W | Tropical Storm | |
| 93 kmh | 994 mb | 16.9 | 145.1 | 17 kmh W | Tropical Storm | |
| 93 kmh | 993 mb | 16.5 | 145.8 | 22 kmh W | Tropical Storm | |
| 74 kmh | 997 mb | 16.9 | 146.8 | 24 kmh W | Tropical Storm | |
| 74 kmh | 997 mb | 16.7 | 147.9 | 29 kmh W | Tropical Storm | |
| 65 kmh | 1,000 mb | 16.2 | 150.0 | 15 kmh W | Tropical Storm | |
| 65 kmh | 1,002 mb | 16.0 | 151.0 | 7 kmh W | Tropical Storm | |
| 56 kmh | 1,001 mb | 15.8 | 150.9 | 14 kmh W | Tropical Depression | |
| 46 kmh | 1,005 mb | 15.6 | 151.9 | 12 kmh W | Tropical Depression | |
| 37 kmh | 15.6 | 152.6 | 12 kmh W | Tropical Depression | ||
| 37 kmh | 15.6 | 153.3 | 16 kmh W | Tropical Depression | ||
| 37 kmh | 15.5 | 154.2 | 14 kmh W | Tropical Depression | ||
| 37 kmh | 15.4 | 155.0 | 11 kmh W | Tropical Depression | ||
| 37 kmh | 15.2 | 155.6 | 9 kmh W | Tropical Depression | ||
| 37 kmh | 15.1 | 156.1 | 11 kmh W | Tropical Depression | ||
| 37 kmh | 14.9 | 156.7 | 6 kmh W | Tropical Depression | ||
| 28 kmh | 15.0 | 157.0 | 0 kmh N | Tropical Depression |
What's happening now
Typhoon Choi-Wan is over open water in the western Pacific at 22.1°N, 147.1°E, moving toward the north at 17 km/h on a 20° heading. The latest reading records sustained winds of 204 km/h, gusts of 235 km/h, and central pressure of 942 mb. Choi-Wan is a typhoon, the basin’s term for this storm category. The storm has strengthened since the previous reading, when winds were 176 km/h and pressure was 955 mb. The latest reading is also the strongest recorded in the available history. No nearby town, region, country, or named water is included in the latest reading, so the storm’s current position is described as open water with nothing near it.
Areas under watch or warning
No active watches or warnings.
How Choi-Wan developed
September 28 — First reading as a tropical depression
TWENTY-SI first appears in the record as a tropical depression with 28 km/h winds and 32 km/h gusts at 15.0°N, 157.0°E. The initial reading shows no movement. The system has no recorded location name, so the observation places TWENTY-SI over open water with nothing named nearby.
September 28 — Begins moving west
Six hours later, TWENTY-SI is moving at 6 km/h on a bearing of 251°. The depression has 37 km/h winds and 43 km/h gusts at 14.9°N, 156.7°E. Later readings turn the movement farther west, with bearings from 270° to 289° through September 29.
September 29 — Westward movement reaches 16 km/h
TWENTY-SI continues west across the open-water track, reaching a recorded movement speed of 16 km/h at 12:00 UTC. The depression holds 37 km/h winds and 43 km/h gusts while its position shifts to 15.6°N, 153.3°E. The available readings show no change in classification.
September 30 — Strongest recorded reading
The latest reading records TWENTY-SI's highest wind speed so far: 46 km/h, with gusts of 53 km/h. Central pressure is 1,005 mb at 15.6°N, 151.9°E. The tropical depression is moving west at 12 km/h. No later observation is available in the current record.
September 30 — Strengthens into a tropical storm
At 12:00 UTC, TWENTY-SI reaches tropical-storm strength with sustained winds of 65 km/h and gusts of 75 km/h. The reading records pressure at 1,002 mb and places the storm at 16°N, 151°E, moving west-northwest at 7 km/h. This is the strongest wind reading on file.
October 2 — Strengthens into a typhoon
At 12:00 UTC on October 2, Choi-Wan's wind reached 130 km/h, with gusts of 150 km/h and central pressure of 981 mb. The reading places the storm 126 km off Northern Mariana Islands in the Philippine Sea at 17.7°N, 144.6°E. This is the strongest reading in the record.
How Choi-Wan is behaving
The nine readings keep TWENTY-SI at tropical-depression strength throughout the record. Wind speed rises from 28 km/h initially to 37 km/h for most of the sequence, then reaches 46 km/h in the latest reading. The final observation also gives a central pressure of 1,005 mb, but earlier pressure values are not available, so the pressure trend cannot be established. The final six-hour interval therefore shows a measured increase in wind, while the available data do not establish whether the system is organising or coming apart.
TWENTY-SI starts stationary, then moves generally westward. The recorded bearing changes from 251° to 289° before settling at 270° in the final reading, while forward speed varies from 6 km/h to 16 km/h and ends at 12 km/h. The position changes from 15.0°N, 157.0°E to 15.6°N, 151.9°E over 48 hours. The track shows a westward-moving tropical depression, but the readings do not provide enough information to assess wind shear, moisture, sea-surface temperature or the storm's internal structure.
How to track Choi-Wan
Open the tropical storm tracks layer in RainViewer to follow TWENTY-SI's recorded path. Each track point is coloured by the storm's category at that moment: cyan for a tropical depression, blue for a tropical storm, yellow for category 1, amber for category 2, orange for category 3, red for category 4 and dark red for category 5. Every point on this track represents the classification recorded at that time, not a forecast.
TWENTY-SI's points show an initial stationary reading followed by westward movement, with the latest point at 15.6°N, 151.9°E and a tropical-depression classification. Compare the point times, wind speeds and movement values to see how the track developed through September 28-30. RainViewer displays radar updates every 5 minutes. Set an alert for your area in the RainViewer app on Google Play or the App Store. Consult your national weather service for official warnings.
What TWENTY-SI's western Pacific setting means
TWENTY-SI is part of the 2026 western Pacific season and is recorded in late September. Tropical systems in this basin commonly develop over warm tropical ocean waters, where humid air and the planet's rotation can support a closed circulation. The readings alone do not identify the conditions that formed TWENTY-SI, and they contain no measurements of sea-surface temperature, moisture or wind shear. The available record establishes only the system's classification, winds, pressure, position and movement.
Several western Pacific storms provide historical comparisons without being direct matches for TWENTY-SI. Typhoon Haiyan in 2013 reached category 5 intensity and later made landfall. Typhoon Bopha in 2012 also reached category 5 intensity before making landfall. Typhoon Mangkhut in 2018 reached category 5 intensity and later made landfall. These storms were far stronger than TWENTY-SI's highest recorded classification, so the comparison is limited to the same basin rather than intensity.
Storm FAQ
What does tropical depression mean for TWENTY-SI?
A tropical depression is the lowest listed tropical-cyclone classification in this record. TWENTY-SI remains in that classification, with the latest reading showing 46 km/h maximum sustained winds and 53 km/h gusts.
What is the difference between TWENTY-SI's wind and gust speed?
The wind value is the storm's maximum sustained wind speed in the reading, while a gust is a brief stronger burst of wind. TWENTY-SI's latest reading lists 46 km/h winds and 53 km/h gusts.
Why do tropical storms receive names or designations?
Names and designations give each tropical system a clear identity in weather information and help distinguish one system from another. TWENTY-SI is the designation used for this system in the 2026 western Pacific season record.
What does 1,005 mb tell us about TWENTY-SI?
The 1,005 mb value is the central atmospheric pressure recorded for TWENTY-SI in the latest observation. Earlier pressure readings are not available, so this page cannot establish a pressure trend.
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