指定気圧面の観測データ（日ごとの値）
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昭和 1991年4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 | 985.5 | 21 | -14.6 | 80 | 4.5 | 170 |
| 2 | 982.7 | 21 | -10.1 | 60 | 5.6 | 20 |
| 3 | 981.9 | 21 | -5.0 | 70 | 8.2 | 50 |
| 4 | 982.5 | 21 | -7.1 | 62 | 0.2 | 15 |
| 5 | 990.6 | 21 | -8.8 | 84 | 0.5 | 200 |
| 6 | 986.0 | 21 | -12.0 | 66 | 0.0 | 5 |
| 7 | 988.6 | 21 | -10.5 | 81 | 4.8 | 160 |
| 8 | 991.4 | 21 | -8.2 | 67 | 3.0 | 140 |
| 9 | 979.1 | 21 | -15.8 | 50 | 2.1 | 170 |
| 10 | 970.3 | 21 | -20.4 | 59 | 1.3 | 270 |
| 11 | 989.6 | 21 | -15.0 | 54 | 3.8 | 20 |
| 12 | 998.5 | 21 | -10.6 | 48 | 2.2 | 40 |
| 13 | 986.7 | 21 | -12.8 | 37 | 1.6 | 160 |
| 14 | 985.6 | 21 | -15.0 | 51 | 8.6 | 60 |
| 15 | 973.7 | 21 | -11.4 | 86 | 20.0 | 100 |
| 16 | 977.7 | 21 | -7.2 | 61 | 12.7 | 100 |
| 17 | 974.0 | 21 | -7.8 | 72 | 1.3 | 320 |
| 18 | 972.0 | 21 | -6.8 | 63 | 4.5 | 80 |
| 19 | 975.5 | 21 | -4.1 | 90 | 16.2 | 50 |
| 20 | 978.8 | 21 | -8.0 | 60 | 6.1 | 140 |
| 21 | 981.0 | 21 | -7.2 | 63 | 14.0 | 70 |
| 22 | 981.1 | 21 | -8.6 | 66 | 2.1 | 150 |
| 23 | 988.6 | 21 | -10.8 | 56 | 6.9 | 80 |
| 24 | 986.9 | 21 | -16.9 | 49 | 0.5 | 80 |
| 25 | 978.4 | 21 | -13.8 | 78 | 8.3 | 20 |
| 26 | 982.4 | 21 | -15.9 | 72 | 0.9 | 220 |
| 27 | 988.3 | 21 | -24.0 | 55 | 2.5 | 240 |
| 28 | 984.9 | 21 | -13.0 | 43 | 2.2 | 90 |
| 29 | 976.1 | 21 | -20.8 | 69 | 7.3 | 20 |
| 30 | 986.8 | 21 | -8.0 | 91 | 16.6 | 40 |