指定気圧面の観測データ（日ごとの値）
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館野 1999年4月9時 地上
| 日 | 気圧(hPa) | 高度(m) | 気温(℃) | 相対湿度(%) | 風速(m/s) | 風向(°) |
|---|---|---|---|---|---|---|
| 1 | 1022.2 | 31 | 6.8 | 99 | 0.7 | 170 |
| 2 | 1007.5 | 31 | 18.3 | 63 | 6.3 | 220 |
| 3 | 1013.6 | 31 | 8.4 | 46 | 3.6 | 40 |
| 4 | 1018.3 | 31 | 9.2 | 66 | 1.2 | 340 |
| 5 | 1010.9 | 31 | 10.4 | 96 | 1.9 | 320 |
| 6 | 1009.3 | 31 | 11.8 | 65 | 4.0 | 30 |
| 7 | 1002.5 | 31 | 8.8 | 76 | 0.7 | 130 |
| 8 | 1014.4 | 31 | 8.0 | 33 | 5.3 | 310 |
| 9 | 1022.9 | 31 | 9.1 | 31 | 2.2 | 280 |
| 10 | 1018.4 | 31 | 10.8 | 60 | 0.6 | 250 |
| 11 | 1005.7 | 31 | 14.8 | 95 | 5.4 | 70 |
| 12 | 1005.7 | 31 | 15.0 | 94 | 1.9 | 10 |
| 13 | 995.9 | 31 | 16.8 | 84 | 4.2 | 200 |
| 14 | 1001.2 | 31 | 15.8 | 61 | 1.6 | 110 |
| 15 | 1015.6 | 31 | 12.7 | 54 | 2.6 | 280 |
| 16 | 1016.7 | 31 | 13.3 | 65 | 2.3 | 40 |
| 17 | 1013.1 | 31 | 15.6 | 47 | 1.5 | 20 |
| 18 | 1015.7 | 31 | 16.0 | 74 | 1.9 | 110 |
| 19 | 1010.5 | 31 | 13.4 | 92 | 1.7 | 30 |
| 20 | 1010.0 | 31 | 16.3 | 74 | 1.3 | 50 |
| 21 | 1018.2 | 31 | 14.9 | 73 | 3.5 | 70 |
| 22 | 1018.0 | 31 | 15.6 | 64 | 2.5 | 230 |
| 23 | 1013.1 | 31 | 16.8 | 87 | 2.7 | 150 |
| 24 | 1007.6 | 31 | 14.6 | 96 | 3.3 | 60 |
| 25 | 1000.8 | 31 | 12.8 | 94 | 4.5 | 290 |
| 26 | 1006.2 | 31 | 16.2 | 87 | 1.5 | 30 |
| 27 | 1004.5 | 31 | 17.6 | 75 | 2.1 | 310 |
| 28 | 1000.6 | 31 | 18.3 | 78 | 0.7 | 170 |
| 29 | 1007.8 | 31 | 9.3 | 82 | 3.0 | 30 |
| 30 | 1021.6 | 31 | 11.8 | 40 | 1.3 | 220 |