The SummaryTyphoon Leo (international code 199902) is a 1999 Northwest Pacific typhoon; peak intensity Super Typhoon, max wind 56m/s, minimum central pressure 970hPa, not in China Landfall, 1999-05-03 was numbered off, recorded 30 track points.
Typhoon Leo, international code 199902, international name LEO, 1999 Northwest Pacific typhoon. Formed: 1999-04-25 18:00:00, ended: 1999-05-03 00:00:00. Peak intensity: Super Typhoon, minimum central pressure: 970 hPa, max wind: 56m/s.
Typhoon Leo at 1999-04-25 18:00:00 at 14.2°N, 114°E over the Northwest Pacific; initial intensity: Nameless.
It peaked at Super Typhoon intensity with max winds of 56 m/s (~202 km/h) and a minimum central pressure of 970hPa, recorded at 1999-04-30 18:00:00.
Typhoon Leo gradually weakened and was numbered off on 1999-05-03 00:00:00 was numbered off; its lifecycle recorded 30 track points.
Typhoon Leo (199902) 的生命史始 at S海中部海域, 整体路径呈现显著的“先W后N再NE”的复杂折线形态. formed初期 (4月25日至27日) , 系统受引导气流影响, 主要 toward WNW, 中心坐标从114°E逐渐W移至111.3°E附近, The latitude维持在15°N至16°N之间. 4月28日凌晨, 系统在110.9°E附近达到最W端, 随后出现明显的路径转折. 自4月28日06:00起, Typhoon 转 toward NE, 重新Go to S海E部海域, 并持续 toward NE direction推进直至消散. 整个过程中, Typhoon 未Landfall任何陆地, 始终在海上活动, 最终 at 5月3日在23.3°N, 114.6°E附近 weakened into Nameless并结束观测. 这种在S海境内的回旋式路径, 反映了当时大尺度环流场对Typhoon 引导气流的复杂调控作用.
Leo's Intensity changes have a typical 'slow accumulation, rapid eruption, rapid decline' characteristic. In the first half of life history (April 25 to 28), the system longined Nameless Intensity, wind speed fluctuated between 7m/s to 17m/s, development was relatively slow. However, since April 29 06:00 upgrading to Tropical Storm, its IntensityGo to explosive growth period. In a short 36h, the center of the Max Wind increased from 23m/s to 56m/s, and at April 30 18:00 reached its peak, was rated Super Typhoon. This phase of rapid enhancement indicates that marine thermal conditions and vertical wind cutting environment are extremely favorable. It is worth noting that after the peak the intensity decline is equally rapid,
As the 2nd Typhoon in 1999, Leo's activities from late April to early May were part of the earlier formed Typhoon case. Compared to historically code or the same name Typhoon, Leo's distinctive feature was at its extremely high peak Intensity (56m/s) and no Landfall record coexistence. Many of the early formed Typhoon tended to be difficult to reach Super Typhoon level due to undertemperature or large windshifts, or before the enhancement, Landfall dispersed. Leo was able to complete the full life cycle of Nameless to Super Typhoon in the S Sea region without direct land impact, reflecting the uniqueness and energy conversion efficiency of its path.
| Time | The latitude | During | Intensity | Wind (m/s) | Pressure (hPa) | Moving toward |
|---|---|---|---|---|---|---|
| 1999-04-25 18:00:00 | 14.2°N | 114°E | Nameless | 7 | - | |
| 1999-04-26 06:00:00 | 14.8°N | 113.9°E | Nameless | 7 | - | |
| 1999-04-26 18:00:00 | 15.4°N | 113.4°E | Nameless | 10 | - | |
| 1999-04-27 06:00:00 | 15.9°N | 112.5°E | Nameless | 12 | 1002 | |
| 1999-04-27 18:00:00 | 15.8°N | 111.3°E | Nameless | 12 | 1000 | |
| 1999-04-28 06:00:00 | 15.2°N | 110.9°E | Nameless | 17 | 996 | |
| 1999-04-28 18:00:00 | 15.8°N | 111.9°E | Nameless | 17 | 994 | |
| 1999-04-29 06:00:00 | 17.3°N | 113.3°E | Tropical Storm | 23 | 990 | |
| 1999-04-29 18:00:00 | 18.1°N | 114.2°E | Typhoon | 33 | 975 | |
| 1999-04-30 06:00:00 | 19°N | 114.9°E | Super Typhoon | 51 | 970 | |
| 1999-04-30 18:00:00 | 19.9°N | 115.5°E | Super Typhoon | 56 | 970 | |
| 1999-05-01 06:00:00 | 20.7°N | 115.5°E | Severe Typhoon | 43 | 980 | |
| 1999-05-01 18:00:00 | 21.3°N | 115.2°E | Typhoon | 33 | 990 | |
| 1999-05-02 06:00:00 | 21.9°N | 114.7°E | Severe Tropical Storm | 25 | 1000 | |
| 1999-05-02 18:00:00 | 22.7°N | 114.7°E | Nameless | 10 | 1002 | |
| 1999-05-03 00:00:00 | 23.3°N | 114.6°E | Nameless | 7 | - |
Sampled rows shown; all 30 track points are available on the interactive map or via the public API .
International code for Typhoon Leo is 199902, is 1999 Typehoon number 2, international name LEO.
Typhoon Leo peak intensity is Super Typhoon, max wind 56m/s, minimum central pressure 970 hPa.
According to records, Typhoon Leo is not in our coastal landfall.
TyphoonSays (taifengshuo.com) provides typhoon Leo's Track history map, multinational meteorological agency Forecast comparison, windshield range with IntensityTrend, page address: https://taifengshuo.com/typhoon/199902.
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