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ArchivedPeak tropical storm
Tropical Storm Ilsa (1999)
Track & history
Peak wind
70 mph / 110 km/h
Min pressure
980 mb
Dates
–
Landfall
Yes
Storm history
Ilsa formed in the Southern Hemisphere in December 1999 and peaked as a tropical storm with maximum sustained winds of 70 mph (110 km/h) and a minimum pressure of 980 mb. The system was tracked for 9 days.
Track data
Download CSV| Time UTC | Position | Strength | Wind | Pressure |
|---|---|---|---|---|
| 1999-12-09 00:00 | 9.0°S 95.2°E | TD | 35 mph / 55 km/h | 1002 mb |
| 1999-12-09 06:00 | 9.1°S 95.7°E | TD | 35 mph / 55 km/h | 1002 mb |
| 1999-12-09 12:00 | 9.1°S 96.3°E | TD | 35 mph / 55 km/h | 1002 mb |
| 1999-12-09 18:00 | 9.2°S 96.8°E | TD | 35 mph / 55 km/h | 1002 mb |
| 1999-12-10 00:00 | 9.3°S 97.4°E | TD | 25 mph / 35 km/h | 1001 mb |
| 1999-12-10 06:00 | 9.6°S 97.9°E | TD | 25 mph / 35 km/h | 999 mb |
| 1999-12-10 12:00 | 9.8°S 98.4°E | TD | 30 mph / 45 km/h | 997 mb |
| 1999-12-10 18:00 | 10.1°S 99.1°E | TD | 35 mph / 55 km/h | 996 mb |
Show all 35 points
| 1999-12-11 00:00 | 10.5°S 99.7°E | TD | 35 mph / 55 km/h | 993 mb |
| 1999-12-11 06:00 | 10.8°S 100.3°E | TS | 40 mph / 65 km/h | 988 mb |
| 1999-12-11 12:00 | 11.2°S 100.9°E | TS | 45 mph / 75 km/h | 985 mb |
| 1999-12-11 18:00 | 11.5°S 101.5°E | TS | 45 mph / 75 km/h | 983 mb |
| 1999-12-12 00:00 | 11.9°S 102.1°E | TS | 45 mph / 75 km/h | 980 mb |
| 1999-12-12 06:00 | 12.1°S 102.6°E | TS | 50 mph / 85 km/h | 981 mb |
| 1999-12-12 12:00 | 12.3°S 103.0°E | TS | 50 mph / 85 km/h | 985 mb |
| 1999-12-12 18:00 | 12.4°S 103.6°E | TS | 50 mph / 85 km/h | 985 mb |
| 1999-12-13 00:00 | 12.4°S 104.3°E | TS | 60 mph / 95 km/h | 986 mb |
| 1999-12-13 06:00 | 12.4°S 105.0°E | TS | 65 mph / 100 km/h | 990 mb |
| 1999-12-13 12:00 | 12.4°S 105.8°E | TS | 65 mph / 100 km/h | 990 mb |
| 1999-12-13 18:00 | 12.4°S 106.6°E | TS | 65 mph / 100 km/h | 990 mb |
| 1999-12-14 00:00 | 12.2°S 107.5°E | TS | 65 mph / 100 km/h | 990 mb |
| 1999-12-14 06:00 | 12.2°S 108.5°E | TS | 65 mph / 100 km/h | 990 mb |
| 1999-12-14 12:00 | 12.1°S 109.4°E | TS | 65 mph / 100 km/h | 990 mb |
| 1999-12-14 18:00 | 12.1°S 110.3°E | TS | 65 mph / 100 km/h | 990 mb |
| 1999-12-15 00:00 | 12.2°S 111.3°E | TS | 65 mph / 100 km/h | 990 mb |
| 1999-12-15 06:00 | 12.5°S 112.5°E | TS | 70 mph / 110 km/h | 990 mb |
| 1999-12-15 12:00 | 12.9°S 113.5°E | TS | 70 mph / 110 km/h | 990 mb |
| 1999-12-15 18:00 | 13.8°S 114.6°E | TS | 70 mph / 110 km/h | 992 mb |
| 1999-12-16 00:00 | 15.0°S 116.0°E | TS | 70 mph / 110 km/h | 992 mb |
| 1999-12-16 06:00 | 16.1°S 117.3°E | TS | 60 mph / 95 km/h | 992 mb |
| 1999-12-16 12:00 | 17.2°S 118.5°E | TS | 50 mph / 85 km/h | 994 mb |
| 1999-12-16 18:00 | 18.2°S 119.3°E | TS | 60 mph / 95 km/h | 994 mb |
| 1999-12-17 00:00 | 19.1°S 120.0°E | TS | 65 mph / 100 km/h | 994 mb |
| 1999-12-17 06:00 | 19.9°S 120.8°E | TS | 40 mph / 65 km/h | 994 mb |
| 1999-12-17 12:00 | 20.7°S 121.7°E | TD | 35 mph / 55 km/h | 995 mb |
Tropical Storm Ilsa 1999 FAQ
Did Tropical Storm Ilsa 1999 make landfall?
The best track records Ilsa crossing land, but not near a sizeable town.
How strong did Ilsa get in 1999?
Ilsa peaked as a tropical storm with maximum sustained winds of 70 mph (110 km/h) and a minimum central pressure of 980 mb.
When did Ilsa form and dissipate?
Ilsa was first tracked on Dec 8 1999 and last tracked on Dec 17 1999, about 9 days in all.