指定気圧面の観測データ（日ごとの値）
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昭和 1999年6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 | 977.4 | 21 | -16.6 | 61 | 8.8 | 50 |
| 2 | 969.4 | 21 | -14.3 | 75 | 11.9 | 40 |
| 3 | 973.4 | 21 | -20.0 | 47 | 1.0 | 200 |
| 4 | 974.7 | 21 | -17.5 | 51 | 2.3 | 100 |
| 5 | 990.0 | 21 | -23.8 | 72 | 0.6 | 350 |
| 6 | 988.8 | 21 | -14.5 | 57 | 6.1 | 90 |
| 7 | 985.7 | 21 | -9.0 | 84 | 23.0 | 60 |
| 8 | 992.2 | 21 | -8.6 | 89 | 17.7 | 40 |
| 9 | 999.9 | 21 | -13.9 | 83 | 2.0 | 160 |
| 10 | 997.7 | 21 | -19.5 | 75 | 5.3 | 180 |
| 11 | 979.1 | 21 | -8.8 | 89 | 27.2 | 60 |
| 12 | 990.4 | 21 | -7.6 | 89 | 19.9 | 80 |
| 13 | 992.6 | 21 | -11.1 | 57 | 1.8 | 140 |
| 14 | 985.0 | 21 | -12.8 | 56 | 9.0 | 40 |
| 15 | 993.7 | 21 | -6.3 | 63 | 15.4 | 70 |
| 16 | 1012.7 | 21 | -7.0 | 57 | 11.0 | 70 |
| 17 | 1007.6 | 21 | -14.9 | 53 | 2.3 | 150 |
| 18 | 1010.7 | 21 | -23.4 | 73 | 0.8 | 220 |
| 19 | 1003.0 | 21 | -23.9 | 73 | 1.3 | 260 |
| 20 | 1002.3 | 21 | -8.1 | 60 | 17.8 | 40 |
| 21 | 999.4 | 21 | -10.9 | 69 | 2.9 | 180 |
| 22 | 998.7 | 21 | -15.1 | 42 | 4.2 | 70 |
| 23 | 1000.6 | 21 | -15.5 | 50 | 2.1 | 10 |
| 24 | 999.1 | 21 | -14.6 | 40 | 1.3 | 280 |
| 25 | /// | /// | /// | /// | /// | /// |
| 26 | 996.4 | 21 | -10.2 | 89 | 27.5 | 40 |
| 27 | 1000.0 | 21 | -12.3 | 85 | 8.8 | 50 |
| 28 | 995.5 | 21 | -17.1 | 52 | 2.3 | 100 |
| 29 | 997.6 | 21 | -16.9 | 51 | 2.1 | 100 |
| 30 | 990.9 | 21 | -10.3 | 76 | 17.5 | 60 |