指定気圧面の観測データ（日ごとの値）
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昭和 2004年5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 | 982.3 | 21 | -9.3 | 89 | 13.5 | 40 |
| 2 | 983.7 | 21 | -12.8 | 52 | 5.7 | 30 |
| 3 | 985.6 | 21 | -11.6 | 43 | 2.6 | 110 |
| 4 | 977.6 | 21 | -18.2 | 40 | 2.5 | 90 |
| 5 | 980.7 | 21 | -19.9 | 75 | 3.4 | 210 |
| 6 | 993.5 | 21 | -15.2 | 58 | 4.6 | 30 |
| 7 | 975.6 | 21 | -9.9 | 63 | 5.2 | 70 |
| 8 | 983.3 | 21 | -8.1 | 60 | 7.7 | 50 |
| 9 | 988.4 | 21 | -9.9 | 42 | 4.3 | 110 |
| 10 | 987.9 | 21 | -12.8 | 60 | 8.4 | 100 |
| 11 | 988.3 | 21 | -16.0 | 66 | 3.3 | 160 |
| 12 | 987.4 | 21 | -8.5 | 87 | 10.2 | 40 |
| 13 | 983.6 | 21 | -17.0 | 45 | 0.9 | 110 |
| 14 | 998.1 | 21 | -13.3 | 64 | 3.4 | 70 |
| 15 | 1004.3 | 21 | -12.8 | 55 | 2.3 | 170 |
| 16 | 997.7 | 21 | -13.7 | 52 | 6.8 | 60 |
| 17 | 982.1 | 21 | -16.9 | 57 | 8.0 | 80 |
| 18 | 982.6 | 21 | -9.5 | 87 | 20.9 | 50 |
| 19 | 978.7 | 21 | -14.0 | 69 | 2.2 | 250 |
| 20 | 976.2 | 21 | -11.1 | 51 | 10.8 | 80 |
| 21 | 973.7 | 21 | -11.1 | 58 | 6.6 | 90 |
| 22 | 975.2 | 21 | -10.5 | 54 | 3.7 | 100 |
| 23 | 982.0 | 21 | -12.6 | 67 | 3.8 | 180 |
| 24 | 985.8 | 21 | -12.3 | 68 | 2.1 | 10 |
| 25 | 986.4 | 21 | -17.1 | 83 | 3.4 | 20 |
| 26 | 989.5 | 21 | -17.8 | 73 | 5.0 | 180 |
| 27 | 988.9 | 21 | -17.9 | 64 | 1.0 | 30 |
| 28 | /// | /// | /// | /// | /// | /// |
| 29 | 968.9 | 21 | -7.4 | 92 | 24.2 | 70 |
| 30 | 982.0 | 21 | -8.1 | 86 | 3.0 | 140 |
| 31 | 950.6 | 21 | -7.0 | 92 | 23.8 | 60 |