Typhoon Megi - 2004/08/16 1200 UTC
Flight route of DOTSTAR
Storm symbol in black: Location of the storm center at 2004/08/16 1200 UTC.
Storm symbol in green: Location of the storm center as the first dropwindsonde reached the surface.
Storm symbol in blue: Location of the storm center as the last dropwindsonde reached the surface.
Wind vector at each pressure level
Dropwindsonde information and the estimated surface wind speed
| NO. | TIME | Longitude | Latitude | DIST | WD | WS | MBL | WL150 |
|---|---|---|---|---|---|---|---|---|
| 1 | 2004/08/16 10:31:50 | 120.9 | 21.0 | 942 | 037 | 6.5 | 5.1 | 5.4 |
| 2 | 2004/08/16 10:45:44 | 122.4 | 20.7 | 779 | 344 | --- | 5.9 | 4.6 |
| 3 | 2004/08/16 11:04:01 | 124.5 | 20.3 | 553 | 357 | 11.7 | 10.1 | 9.9 |
| 4 | 2004/08/16 11:22:20 | 126.4 | 19.7 | 343 | 338 | 9.4 | 8.8 | 7.7 |
| 5 | 2004/08/16 11:32:41 | 126.6 | 18.6 | 332 | 303 | --- | 10.3 | 10.2 |
| 6 | 2004/08/16 11:48:41 | 127.5 | 17.1 | 355 | 257 | --- | 10.5 | 10.5 |
| 7 | 2004/08/16 12:01:13 | 128.9 | 16.6 | 348 | 248 | --- | 10.5 | 8.8 |
| 8 | 2004/08/16 12:20:15 | 130.7 | 17.6 | 273 | 233 | --- | 16.4 | 13.9 |
| 9 | 2004/08/16 12:33:38 | 131.7 | 18.9 | 253 | 203 | --- | 20.2 | 18.9 |
| 10 | 2004/08/16 12:45:59 | 131.8 | 20.3 | 253 | 177 | 23.5 | 21.8 | 21.5 |
| 11 | 2004/08/16 12:58:41 | 131.4 | 21.7 | 290 | 122 | 16.9 | 19.2 | 17.5 |
| 12 | 2004/08/16 13:09:14 | 130.5 | 22.6 | 315 | 091 | 18.3 | 18.0 | 16.0 |
| 13 | 2004/08/16 13:21:50 | 128.9 | 22.9 | 324 | 048 | --- | 11.4 | 10.4 |
| 14 | 2004/08/16 13:37:06 | 127.1 | 22.3 | 342 | 014 | --- | 9.6 | 9.5 |
| 15 | 2004/08/16 13:49:01 | 126.0 | 21.3 | 374 | 008 | 8.8 | 9.1 | 7.0 |
| 16 | 2004/08/16 14:00:57 | 124.4 | 21.3 | 525 | 005 | 9.7 | 8.7 | 8.3 |
| 17 | 2004/08/16 14:13:38 | 122.9 | 21.6 | 685 | 348 | 9.0 | 7.3 | 7.4 |
TIME: Time when dropwindsondes reached the surface. (UTC)
DIST: The distance form each dropwindsonde to the corresponded storm center. (km)
WD: Surface wind direction. (degree)
Surface wind speed: (unit : m/s)
(1) WS: Surface wind speed (at a height of 10 meters) directly from the dropwindsondes.
(2) MBL (Franklin 2003): Averaging the dropwindsonde wind speed over the 0~500 m layer, multiplied by 0.80.
(3) WL150 (Franklin 2003): Averaging the dropwindsonde wind speed over the 0~150 m layer, divided by 1.229.
Ask for Data
If you want to ask for the raw data of dropwindsondes, please contact with Central Weather Bureau (CWB).