| Category 4 typhoon (SSHWS) | |
 Surface weather analysis of Typhoon Allyn on November 18 | |
| Formed | November 13, 1949 |
|---|---|
| Dissipated | November 26, 1949 |
| (Extratropical after November 24, 1949) | |
| Highest winds | 1-minute sustained: 230 km/h (145 mph) |
| Lowest pressure | 884 hPa (mbar); 26.1 inHg |
| Fatalities | None |
| Damage | $19 million (1949 USD) |
| Areas affected | Kwajalein • Guam • Japan |
| Part of the 1949 Pacific typhoon season | |
