指定気圧面の観測データ（日ごとの値）
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根室 1990年7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 | 1013.7 | 26 | 14.6 | 86 | 2.3 | 270 |
| 2 | 1011.8 | 26 | 20.1 | 64 | 2.7 | 200 |
| 3 | 1013.2 | 26 | 18.4 | 76 | 5.3 | 210 |
| 4 | 1012.9 | 26 | 15.2 | 99 | 5.7 | 160 |
| 5 | 1007.9 | 26 | 13.2 | 100 | 5.5 | 130 |
| 6 | 1007.1 | 26 | 15.9 | 97 | 4.2 | 140 |
| 7 | 1008.8 | 26 | 16.0 | 87 | 3.6 | 130 |
| 8 | 1011.2 | 26 | 14.1 | 92 | 3.0 | 120 |
| 9 | 1014.4 | 26 | 11.4 | 88 | 2.3 | 100 |
| 10 | 1011.8 | 26 | 10.2 | 97 | 2.7 | 110 |
| 11 | 1009.9 | 26 | 10.1 | 98 | 4.2 | 40 |
| 12 | 1010.3 | 26 | 11.9 | 94 | 2.1 | 120 |
| 13 | 1009.4 | 26 | 13.1 | 88 | 3.6 | 90 |
| 14 | 1012.5 | 26 | 15.1 | 88 | 2.1 | 130 |
| 15 | 1006.4 | 26 | 12.6 | 100 | 2.6 | 360 |
| 16 | 994.4 | 26 | 13.2 | 99 | 5.4 | 20 |
| 17 | 997.8 | 26 | 18.8 | 88 | 4.6 | 130 |
| 18 | 997.8 | 26 | 19.3 | 98 | 2.3 | 160 |
| 19 | 999.7 | 26 | 15.0 | 100 | 6.4 | 20 |
| 20 | 1012.9 | 26 | 12.7 | 97 | 3.2 | 130 |
| 21 | 1013.9 | 26 | 15.3 | 94 | 3.7 | 200 |
| 22 | 1006.9 | 26 | 15.1 | 100 | 3.8 | 160 |
| 23 | 1005.2 | 26 | 17.6 | 96 | 2.0 | 340 |
| 24 | 1004.8 | 26 | 20.4 | 94 | 2.9 | 150 |
| 25 | 1002.5 | 26 | 20.4 | 91 | 4.5 | 160 |
| 26 | 997.7 | 26 | 17.9 | 100 | 4.1 | 190 |
| 27 | 1012.0 | 26 | 18.2 | 78 | 3.5 | 10 |
| 28 | 1013.5 | 26 | 14.5 | 93 | 1.8 | 50 |
| 29 | 1011.6 | 26 | 14.8 | 96 | 2.2 | 110 |
| 30 | 1009.6 | 26 | 17.6 | 95 | 3.1 | 20 |
| 31 | 1009.1 | 26 | 19.0 | 89 | 2.2 | 130 |