Tropical Storm 1S (1991)
Track & history
Storm history
This system formed in the Southern Hemisphere in September 1991 and peaked as a tropical storm with maximum sustained winds of 50 mph (85 km/h). It did not make landfall. The system was tracked for 3 days.
Track data
Download CSVData source: NOAA NCEI IBTrACS v04r01. IBTrACS v04r01 use constraints.
Gahtan, Jennifer; Knapp, Kenneth R.; Schreck, Carl J. III; Diamond, Howard J.; Kossin, James P.; Kruk, Michael C. (2024). International Best Track Archive for Climate Stewardship (IBTrACS) Project, Version 4.01. NOAA National Centers for Environmental Information. Cite the subset used and access date. IBTrACS v04r01 dataset DOI.
| Time UTC | Position | Strength | Wind | Pressure |
|---|---|---|---|---|
| 1991-09-10 06:00 | 8.8°S 79.7°E | TD | 25 mph / 35 km/h | — |
| 1991-09-10 12:00 | 9.2°S 80.2°E | TD | 30 mph / 45 km/h | — |
| 1991-09-10 18:00 | 9.7°S 80.5°E | TD | 30 mph / 45 km/h | — |
| 1991-09-11 00:00 | 10.1°S 80.6°E | TD | 35 mph / 55 km/h | — |
| 1991-09-11 06:00 | 10.4°S 80.5°E | TD | 35 mph / 55 km/h | — |
| 1991-09-11 12:00 | 10.7°S 80.4°E | TS | 40 mph / 65 km/h | — |
| 1991-09-11 18:00 | 11.0°S 80.4°E | TS | 40 mph / 65 km/h | — |
| 1991-09-12 00:00 | 11.2°S 80.6°E | TS | 45 mph / 75 km/h | — |
Show all 13 points
| 1991-09-12 06:00 | 11.3°S 81.0°E | TS | 50 mph / 85 km/h | — |
| 1991-09-12 12:00 | 11.0°S 81.3°E | TS | 45 mph / 75 km/h | — |
| 1991-09-12 18:00 | 10.6°S 81.5°E | TS | 40 mph / 65 km/h | — |
| 1991-09-13 00:00 | 10.1°S 81.3°E | TD | 35 mph / 55 km/h | — |
| 1991-09-13 06:00 | 9.7°S 81.1°E | TD | 30 mph / 45 km/h | — |
Tropical Storm 1S 1991 FAQ
Did Tropical Storm 1S 1991 make landfall?
No. The best track does not record a landfall for 1S; it stayed over water.
How strong did 1S get in 1991?
1S peaked as a tropical storm with maximum sustained winds of 50 mph (85 km/h).
When did 1S form and dissipate?
1S was first tracked on Sep 10 1991 and last tracked on Sep 13 1991, about 3 days in all.