指定気圧面の観測データ（日ごとの値）
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昭和 1999年8月9時（現地時間 3時） 地上
| 日 | 気圧(hPa) | 高度(m) | 気温(℃) | 相対湿度(%) | 風速(m/s) | 風向(°) |
|---|---|---|---|---|---|---|
| 1 | 997.0 | 21 | -29.7 | 63 | 0.6 | 80 |
| 2 | 1000.0 | 21 | -30.6 | 69 | 3.5 | 290 |
| 3 | 996.1 | 21 | -25.1 | 54 | 1.9 | 20 |
| 4 | 989.1 | 21 | -19.2 | 42 | 2.8 | 120 |
| 5 | 988.2 | 21 | -25.0 | 59 | 10.9 | 80 |
| 6 | 1003.6 | 21 | -28.0 | 51 | 1.0 | 150 |
| 7 | 1000.9 | 21 | -34.6 | 67 | 1.4 | 260 |
| 8 | 986.9 | 21 | -17.3 | 55 | 1.0 | 290 |
| 9 | 977.8 | 21 | -11.5 | 79 | 7.3 | 50 |
| 10 | 977.6 | 21 | -11.8 | 83 | 1.2 | 270 |
| 11 | 978.5 | 21 | -13.4 | 43 | 1.1 | 20 |
| 12 | 976.7 | 21 | -24.4 | 71 | 1.8 | 270 |
| 13 | 989.9 | 21 | -28.1 | 75 | 0.8 | 170 |
| 14 | 989.0 | 21 | -18.6 | 41 | 3.5 | 80 |
| 15 | 966.7 | 21 | -6.0 | 93 | 21.9 | 40 |
| 16 | 988.4 | 21 | -13.6 | 82 | 1.6 | 30 |
| 17 | 975.8 | 21 | -18.0 | 80 | 4.1 | 180 |
| 18 | 964.5 | 21 | -24.7 | 80 | 0.7 | 220 |
| 19 | 973.4 | 21 | -26.0 | 76 | 2.2 | 30 |
| 20 | 986.0 | 21 | -24.2 | 70 | 3.3 | 70 |
| 21 | 979.8 | 21 | -25.3 | 70 | 5.8 | 170 |
| 22 | 975.5 | 21 | -35.0 | 71 | 2.5 | 20 |
| 23 | 988.5 | 21 | -33.7 | 72 | 2.2 | 190 |
| 24 | 993.8 | 21 | -21.4 | 70 | 4.7 | 160 |
| 25 | 996.4 | 21 | -18.3 | 65 | 8.0 | 70 |
| 26 | 979.0 | 21 | -20.1 | 51 | 1.3 | 60 |
| 27 | 977.3 | 21 | -18.3 | 71 | 8.5 | 50 |
| 28 | 977.7 | 21 | -19.6 | 70 | 5.6 | 180 |
| 29 | 990.6 | 21 | -24.5 | 76 | 1.4 | 140 |
| 30 | 1003.3 | 21 | -15.5 | 64 | 2.0 | 30 |
| 31 | 981.7 | 21 | -8.9 | 90 | 22.6 | 50 |