指定気圧面の観測データ（日ごとの値）
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昭和 1997年5月21時（現地時間 15時） 地上
| 日 | 気圧(hPa) | 高度(m) | 気温(℃) | 相対湿度(%) | 風速(m/s) | 風向(°) |
|---|---|---|---|---|---|---|
| 1 | 978.7 | 21 | -6.3 | 69 | 7.0 | 100 |
| 2 | 985.1 | 21 | -8.2 | 71 | 9.6 | 90 |
| 3 | 993.3 | 21 | -12.2 | 88 | 3.3 | 200 |
| 4 | 985.1 | 21 | -19.7 | 70 | 3.4 | 190 |
| 5 | 977.4 | 21 | -15.3 | 75 | 5.1 | 170 |
| 6 | 982.1 | 21 | -14.4 | 76 | 2.6 | 160 |
| 7 | 984.1 | 21 | -7.7 | 95 | 18.2 | 40 |
| 8 | 966.0 | 21 | -3.6 | 96 | 11.8 | 40 |
| 9 | 971.1 | 21 | -6.2 | 88 | 8.5 | 40 |
| 10 | 977.2 | 21 | -13.2 | 87 | 4.3 | 170 |
| 11 | 985.7 | 21 | -20.9 | 71 | 3.1 | 200 |
| 12 | 982.4 | 21 | -16.4 | 73 | 6.6 | 180 |
| 13 | 986.1 | 21 | -19.8 | 41 | 3.0 | 50 |
| 14 | 983.1 | 21 | -21.0 | 41 | 1.7 | 120 |
| 15 | 984.1 | 21 | -16.9 | 47 | 8.8 | 80 |
| 16 | 986.6 | 21 | -9.2 | 72 | 17.5 | 60 |
| 17 | 984.1 | 21 | -13.5 | 59 | 7.5 | 100 |
| 18 | 979.4 | 21 | -11.7 | 58 | 5.3 | 40 |
| 19 | 984.7 | 21 | -13.2 | 63 | 6.1 | 100 |
| 20 | 968.4 | 21 | -5.6 | 94 | 30.7 | 60 |
| 21 | 976.9 | 21 | -4.9 | 96 | 4.0 | 10 |
| 22 | 980.6 | 21 | -8.7 | 69 | 3.7 | 60 |
| 23 | 979.4 | 21 | -9.9 | 84 | 11.9 | 50 |
| 24 | 973.0 | 21 | -9.6 | 75 | 8.3 | 70 |
| 25 | 989.4 | 21 | -19.9 | 76 | 3.6 | 210 |
| 26 | 992.1 | 21 | -26.1 | 62 | 0.9 | 210 |
| 27 | 985.8 | 21 | -21.7 | 40 | 3.1 | 120 |
| 28 | 965.5 | 21 | -26.3 | 43 | 0.4 | 40 |
| 29 | 969.0 | 21 | -27.8 | 37 | 2.0 | 150 |
| 30 | 970.8 | 21 | -25.1 | 44 | 3.0 | 150 |
| 31 | 965.6 | 21 | -18.6 | 33 | 0.9 | 100 |