指定気圧面の観測データ（日ごとの値）
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昭和 1984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 | 976.9 | 21 | -6.2 | 63 | 8.6 | 60 |
| 2 | 985.2 | 21 | -12.4 | 71 | 3.8 | 210 |
| 3 | 990.4 | 21 | -7.3 | 58 | 10.4 | 50 |
| 4 | 985.8 | 21 | -12.4 | 64 | 2.6 | 220 |
| 5 | 979.0 | 21 | -12.6 | 73 | 5.6 | 200 |
| 6 | 990.9 | 21 | -8.6 | 79 | 2.9 | 80 |
| 7 | 992.1 | 21 | -10.5 | 75 | 5.7 | 210 |
| 8 | 983.4 | 21 | -17.6 | 54 | 4.3 | 190 |
| 9 | 982.7 | 21 | -10.7 | 68 | 10.9 | 40 |
| 10 | /// | /// | /// | /// | /// | /// |
| 11 | 974.6 | 21 | -7.4 | 80 | 7.5 | 10 |
| 12 | 986.5 | 21 | -4.3 | 81 | 9.0 | 40 |
| 13 | 986.4 | 21 | -7.5 | 70 | 3.6 | 190 |
| 14 | 982.4 | 21 | -6.2 | 82 | 3.6 | 30 |
| 15 | 973.6 | 21 | -5.0 | 81 | 20.1 | 50 |
| 16 | 978.7 | 21 | -5.7 | 87 | 17.9 | 50 |
| 17 | 985.9 | 21 | -6.7 | 84 | 10.5 | 40 |
| 18 | 986.4 | 21 | -10.9 | 75 | 3.1 | 140 |
| 19 | 972.9 | 21 | -6.7 | 80 | 19.7 | 50 |
| 20 | 985.2 | 21 | -8.4 | 84 | 11.8 | 30 |
| 21 | 973.4 | 21 | -15.6 | 46 | 1.2 | 340 |
| 22 | 977.2 | 21 | -9.5 | 68 | 8.2 | 70 |
| 23 | 993.6 | 21 | -14.5 | 83 | 4.2 | 30 |
| 24 | 984.5 | 21 | -5.4 | 87 | 21.9 | 50 |
| 25 | 984.7 | 21 | -7.0 | 69 | 11.5 | 70 |
| 26 | 990.4 | 21 | -8.4 | 63 | 5.1 | 100 |
| 27 | 994.0 | 21 | -8.4 | 80 | 2.0 | 200 |
| 28 | 985.3 | 21 | -12.7 | 40 | 0.6 | 270 |
| 29 | 982.3 | 21 | -11.8 | 67 | 0.0 | - |
| 30 | 983.0 | 21 | -20.7 | 61 | 0.6 | 270 |