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JMA/2504/07-07 00Z
本帖最后由 ygsj24 于 2025-7-7 10:05 编辑
台風第4号(ダナス)
2025年07月07日09時50分発表
07日09時の実況
種別 台風
大きさ -
強さ -
存在地域 台湾海峡
中心位置 北緯25度55分 (25.9度)
東経120度50分 (120.8度)
進行方向、速さ 北 25 km/h (14 kt)
中心気圧 990 hPa
中心付近の最大風速 23 m/s (45 kt)
最大瞬間風速 35 m/s (65 kt)
15m/s以上の強風域 南東側 440 km (240 NM)
北西側 220 km (120 NM)
07日21時の予報
種別 台風
強さ -
存在地域 東シナ海
予報円の中心 北緯27度20分 (27.3度)
東経122度35分 (122.6度)
進行方向、速さ 北東 20 km/h (11 kt)
中心気圧 994 hPa
中心付近の最大風速 20 m/s (40 kt)
最大瞬間風速 30 m/s (60 kt)
予報円の半径 85 km (45 NM)
08日09時の予報
種別 台風
強さ -
存在地域 東シナ海
予報円の中心 北緯28度25分 (28.4度)
東経122度35分 (122.6度)
進行方向、速さ 北 10 km/h (6 kt)
中心気圧 994 hPa
中心付近の最大風速 20 m/s (40 kt)
最大瞬間風速 30 m/s (60 kt)
予報円の半径 120 km (65 NM)
09日09時の予報
種別 台風
強さ -
存在地域 華中
予報円の中心 北緯28度20分 (28.3度)
東経118度55分 (118.9度)
進行方向、速さ 西 15 km/h (8 kt)
中心気圧 996 hPa
最大風速 18 m/s (35 kt)
最大瞬間風速 25 m/s (50 kt)
予報円の半径 210 km (115 NM)
10日09時の予報
種別 熱帯低気圧
強さ -
存在地域 華南
予報円の中心 北緯26度30分 (26.5度)
東経114度40分 (114.7度)
進行方向、速さ 西南西 20 km/h (10 kt)
中心気圧 998 hPa
予報円の半径 300 km (160 NM)
- WTPQ31 RJTD 070000
- RSMC TROPICAL CYCLONE PROGNOSTIC REASONING
- REASONING NO.13 FOR TS 2504 DANAS (2504)
- 1.GENERAL COMMENTS
- TS DANAS IS LOCATED AT 25.9N, 120.8E. INFORMATION ON THE CURRENT
- POSITION IS BASED ON ANIMATED MSI AND SURFACE OBSERVATIONS.
- POSITIONAL ACCURACY IS GOOD. CENTRAL PRESSURE IS 990HPA AND
- MAXIMUM SUSTAINED WINDS NEAR THE CENTER ARE 45KNOTS. THE SYSTEM IS
- IN AN UNFAVORABLE ENVIRONMENT FOR DEVELOPMENT UNDER THE INFLUENCE
- OF LAND. THIS HAS CAUSED THE SYSTEM TO WEAKEN OVER THE LAST SIX
- HOURS. IT HAS ALSO WEAKENED RAPIDLY DUE TO THE INFLUENCE OF LAND
- OVER THE LAST 12 HOURS. INFORMATION ON THE CURRENT INTENSITY IS
- BASED ON DVORAK INTENSITY ANALYSES AND SURFACE OBSERVATIONS.
- 2.SYNOPTIC SITUATION
- THE SYSTEM IS MOVING NORTHWARD ALONG THE WESTERN PERIPHERY OF A
- MID-LEVEL SUB-TROPICAL HIGH. ANIMATED MSI SHOWS THE EYE HAS BECOME
- OBSCURE. ANIMATED MSI SHOWS GOOD CLOUD CHARACTERISTICS OF
- ANTICYCLONIC OUTFLOW. NOAA-20/ATMS 85 GHZ MICROWAVE IMAGERY SHOWS
- THE SYSTEM HAS ACTIVE CONVECTIVE CLOUD CLUSTERS AROUND THE CSC.
- 3.TRACK FORECAST
- THE SYSTEM WILL MOVE NORTH-NORTHEASTWARD ALONG THE PERIPHERY OF A
- MID-LEVEL SUB-TROPICAL HIGH UNTIL FT24. THE SYSTEM WILL THEN
- GRADUALLY TURN TO THE WEST ALONG THE PERIPHERY OF A MID-LEVEL
- SUB-TROPICAL HIGH UNTIL FT48. THE SYSTEM WILL THEN MOVE
- WEST-SOUTHWESTWARD ALONG THE PERIPHERY OF A MID-LEVEL SUB-TROPICAL
- HIGH UNTIL FT72. THE SYSTEM WILL HIT THE CHINESE MAINLAND BY FT48.
- THE TRACK FORECAST IS BASED ON GSM PREDICTIONS, AND REFERENCE TO
- OTHER NWP MODELS. TRACK FORECAST CONFIDENCE IS LOW DUE TO
- SIGNIFICANT DIFFERENCES AMONG NWP MODEL OUTPUTS.
- 4.INTENSITY FORECAST
- THE SYSTEM WILL GRADUALLY WEAKEN UNTIL FT24 DUE TO THE INFLUENCE
- OF INTERACTION WITH HIGH SSTS, WEAK VWS AND LAND. THE SYSTEM WILL
- THEN WEAKEN UNTIL FT72 DUE TO ITS LANDFALL. THE SYSTEM WILL WEAKEN
- TO TD INTENSITY BY FT72. THE INTENSITY FORECAST IS BASED ON A
- CONSENSUS OF GUIDANCE DATA INCLUDING GSM.
- =
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