指定気圧面の観測データ（日ごとの値）
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昭和 1990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 | 1018.5 | 21 | -9.2 | 60 | 10.3 | 60 |
| 2 | 1015.6 | 21 | -5.8 | 72 | 4.0 | 40 |
| 3 | 1015.1 | 21 | -6.4 | 58 | 7.2 | 40 |
| 4 | 1014.0 | 21 | -7.0 | 84 | 8.0 | 20 |
| 5 | 1008.8 | 21 | -12.2 | 91 | 1.9 | 180 |
| 6 | 1010.9 | 21 | -16.1 | 52 | 2.3 | 140 |
| 7 | 1007.9 | 21 | -10.6 | 85 | 6.0 | 30 |
| 8 | 1001.7 | 21 | -4.9 | 86 | 18.9 | 60 |
| 9 | 1009.9 | 21 | -6.0 | 45 | 4.3 | 120 |
| 10 | 1008.2 | 21 | -12.3 | 37 | 4.1 | 120 |
| 11 | 1009.8 | 21 | -20.1 | 53 | 0.9 | 160 |
| 12 | 1005.4 | 21 | -14.1 | 39 | 3.7 | 70 |
| 13 | 986.6 | 21 | -18.0 | 38 | 4.4 | 120 |
| 14 | 980.9 | 21 | -19.0 | 51 | 6.9 | 40 |
| 15 | 989.7 | 21 | -19.1 | 72 | 6.1 | 170 |
| 16 | 986.5 | 21 | -28.2 | 63 | 0.1 | 98 |
| 17 | 983.2 | 21 | -23.6 | 53 | 6.9 | 180 |
| 18 | 987.2 | 21 | -19.5 | 61 | 5.5 | 150 |
| 19 | 987.2 | 21 | -16.3 | 48 | 2.6 | 150 |
| 20 | 998.7 | 21 | -17.8 | 72 | 3.5 | 160 |
| 21 | 992.1 | 21 | -15.0 | 41 | 5.0 | 160 |
| 22 | 971.6 | 21 | -5.8 | 90 | 9.2 | 30 |
| 23 | 982.4 | 21 | -7.4 | 84 | 4.6 | 70 |
| 24 | 985.8 | 21 | -12.4 | 93 | 0.6 | 60 |
| 25 | 967.6 | 21 | -8.8 | 93 | 27.8 | 60 |
| 26 | 982.8 | 21 | -15.8 | 74 | 8.6 | 60 |
| 27 | 983.2 | 21 | -12.1 | 78 | 4.2 | 30 |
| 28 | 981.4 | 21 | -18.3 | 57 | 6.6 | 170 |
| 29 | 993.3 | 21 | -19.9 | 65 | 1.5 | 180 |
| 30 | 981.8 | 21 | -13.4 | 81 | 13.5 | 30 |
| 31 | 987.8 | 21 | -14.9 | 75 | 10.3 | 30 |