指定気圧面の観測データ（日ごとの値）
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昭和 2002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 | 984.3 | 21 | -4.2 | 68 | 8.8 | 60 |
| 2 | 990.7 | 21 | -3.2 | 65 | 12.7 | 40 |
| 3 | 981.3 | 21 | -2.0 | 96 | 10.2 | 40 |
| 4 | 980.0 | 21 | -4.2 | 75 | 6.4 | 70 |
| 5 | 973.0 | 21 | -15.9 | 73 | 2.4 | 210 |
| 6 | 972.1 | 21 | -10.7 | 88 | 6.4 | 180 |
| 7 | 974.0 | 21 | -18.7 | 78 | 2.3 | 210 |
| 8 | 987.4 | 21 | -23.9 | 76 | 0.8 | 260 |
| 9 | 991.2 | 21 | -3.0 | 95 | 21.6 | 40 |
| 10 | 990.6 | 21 | 0.3 | 96 | 17.0 | 40 |
| 11 | 974.7 | 21 | -0.2 | 87 | 19.8 | 40 |
| 12 | 979.7 | 21 | -2.4 | 77 | 7.7 | 60 |
| 13 | 986.8 | 21 | -7.5 | 61 | 1.1 | 90 |
| 14 | 979.5 | 21 | -14.2 | 57 | 4.2 | 180 |
| 15 | 994.7 | 21 | -10.5 | 51 | 3.7 | 50 |
| 16 | 988.8 | 21 | -7.0 | 53 | 2.1 | 90 |
| 17 | 988.3 | 21 | -13.2 | 52 | 7.3 | 50 |
| 18 | 993.2 | 21 | -15.1 | 42 | 1.0 | 300 |
| 19 | 986.0 | 21 | -11.9 | 61 | 2.0 | 110 |
| 20 | 986.1 | 21 | -10.4 | 69 | 9.0 | 50 |
| 21 | 983.8 | 21 | -8.7 | 55 | 2.1 | 70 |
| 22 | 984.7 | 21 | -12.6 | 44 | 1.4 | 60 |
| 23 | 983.8 | 21 | -12.1 | 54 | 10.9 | 60 |
| 24 | 982.4 | 21 | -5.3 | 88 | 20.4 | 60 |
| 25 | 988.0 | 21 | -5.3 | 92 | 19.3 | 50 |
| 26 | 996.3 | 21 | -7.5 | 74 | 9.1 | 60 |
| 27 | 994.4 | 21 | -14.2 | 54 | 2.7 | 160 |
| 28 | 996.1 | 21 | -17.2 | 54 | 2.1 | 90 |
| 29 | 972.9 | 21 | -6.0 | 92 | 25.7 | 70 |
| 30 | 984.4 | 21 | -3.9 | 94 | 18.1 | 50 |