指定気圧面の観測データ（日ごとの値）
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昭和 1980年4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 | 975.7 | 21 | -2.2 | 63 | 15.6 | 80 |
| 2 | 979.0 | 21 | -3.8 | 60 | 8.3 | 60 |
| 3 | 984.1 | 21 | -5.0 | 54 | 8.8 | 60 |
| 4 | 988.6 | 21 | -6.2 | 57 | 9.7 | 70 |
| 5 | 990.1 | 21 | -2.6 | 53 | 10.7 | 70 |
| 6 | /// | /// | /// | /// | /// | /// |
| 7 | 982.7 | 21 | -1.6 | 60 | 16.3 | 70 |
| 8 | 978.2 | 21 | -2.4 | 50 | 12.7 | 70 |
| 9 | 981.8 | 21 | -5.5 | 50 | 9.4 | 70 |
| 10 | 989.7 | 21 | -5.2 | 60 | 9.0 | 70 |
| 11 | 997.2 | 21 | -4.1 | 64 | 9.0 | 70 |
| 12 | 1000.3 | 21 | -3.1 | 81 | 11.7 | 40 |
| 13 | /// | /// | /// | /// | /// | /// |
| 14 | 992.3 | 21 | -5.9 | 59 | 10.0 | 70 |
| 15 | 978.0 | 21 | -3.4 | 56 | 9.6 | 90 |
| 16 | 967.7 | 21 | -1.1 | 56 | 17.0 | 80 |
| 17 | 983.9 | 21 | -2.4 | 71 | 5.2 | 30 |
| 18 | 1002.9 | 21 | -1.8 | 65 | 4.8 | 40 |
| 19 | 998.8 | 21 | -4.6 | 62 | 5.7 | 70 |
| 20 | /// | /// | /// | /// | /// | /// |
| 21 | 997.3 | 21 | -11.4 | 68 | 0.5 | 80 |
| 22 | 990.9 | 21 | -8.4 | 69 | 2.8 | 90 |
| 23 | 989.5 | 21 | -7.5 | 76 | 17.0 | 40 |
| 24 | 997.1 | 21 | -5.7 | 58 | 8.6 | 50 |
| 25 | 996.8 | 21 | -10.6 | 52 | 2.7 | 70 |
| 26 | 977.4 | 21 | -11.0 | 59 | 7.7 | 60 |
| 27 | /// | /// | /// | /// | /// | /// |
| 28 | 979.8 | 21 | -7.0 | 69 | 6.7 | 40 |
| 29 | 978.8 | 21 | -8.9 | 90 | 3.9 | 180 |
| 30 | 986.4 | 21 | -15.4 | 76 | 0.1 | - |