&sq=&lang=&file=File:Greg_1999-09-06_1900Z.png) Hurricane Greg near peak intensity south of the Baja Peninsula on September 6 | |
| Meteorological history | |
|---|---|
| Formed | September 5, 1999 |
| Dissipated | September 9, 1999 |
| Category 1 hurricane | |
| 1-minute sustained (SSHWS/NWS) | |
| Highest winds | 75 mph (120 km/h) |
| Lowest pressure | 986 mbar (hPa); 29.12 inHg |
| Overall effects | |
| Fatalities | 10 total |
| Damage | Moderate |
| Areas affected | Western Mexico, Baja California Peninsula |
| IBTrACS | |
Part of the 1999 Pacific hurricane season | |
Hurricane Greg was the only eastern Pacific tropical cyclone in 1999 to make a direct landfall. Part of the annual hurricane season, Greg originated from a tropical wave that departed Africa in mid-August. The wave entered the eastern Pacific by September 1, steadily organizing over subsequent days to become a tropical depression on September 5. Amid a favorable environment, the cyclone intensified into Tropical Storm Greg a few hours after formation and further organized into a Category 1 hurricane on September 6. Greg paralleled the southwestern coastline of Mexico, where it destroyed over 250 homes, cut-off roads, killed 10 people, and left at least 4,000 more injured. The storm weakened to tropical storm intensity as it moved ashore Baja California Sur, although rain was generally beneficial there. Succumbing to cooler waters and high wind shear, Greg ultimately dissipated over the Pacific on September 9. Its remnants led to thunderstorms across northern California, with only minor impacts.