指定気圧面の観測データ（日ごとの値）
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稚内 1998年2月21時 地上
| 日 | 気圧(hPa) | 高度(m) | 気温(℃) | 相対湿度(%) | 風速(m/s) | 風向(°) |
|---|---|---|---|---|---|---|
| 1 | 1016.3 | 11 | -5.3 | 58 | 2.7 | 290 |
| 2 | 1013.2 | 11 | -2.8 | 57 | 2.5 | 200 |
| 3 | 1010.1 | 11 | -8.8 | 63 | 8.4 | 360 |
| 4 | 1010.5 | 11 | -10.7 | 80 | 4.7 | 330 |
| 5 | 1009.6 | 11 | -9.4 | 59 | 1.4 | 280 |
| 6 | 1018.6 | 11 | -10.9 | 54 | 8.9 | 350 |
| 7 | 1020.2 | 11 | -9.2 | 66 | 2.8 | 190 |
| 8 | 1005.6 | 11 | -4.9 | 81 | 11.8 | 100 |
| 9 | 1008.7 | 11 | -5.7 | 88 | 6.2 | 110 |
| 10 | 1010.6 | 11 | -6.2 | 89 | 3.5 | 120 |
| 11 | 1021.2 | 11 | -4.9 | 54 | 2.4 | 250 |
| 12 | 995.9 | 11 | -2.0 | 93 | 1.7 | 90 |
| 13 | 1014.8 | 11 | -2.7 | 57 | 4.8 | 260 |
| 14 | 1009.5 | 11 | -5.0 | 42 | 4.7 | 300 |
| 15 | 1015.5 | 11 | -8.2 | 58 | 4.6 | 330 |
| 16 | 1019.1 | 11 | -7.1 | 72 | 3.9 | 10 |
| 17 | 1027.4 | 11 | -8.4 | 64 | 5.8 | 20 |
| 18 | 1028.7 | 11 | -1.3 | 63 | 7.7 | 240 |
| 19 | 1016.2 | 11 | 2.9 | 82 | 7.4 | 240 |
| 20 | 1025.2 | 11 | -6.9 | 49 | 4.4 | 80 |
| 21 | 1024.8 | 11 | -8.9 | 60 | 5.5 | 40 |
| 22 | 1021.0 | 11 | -1.7 | 59 | 2.7 | 240 |
| 23 | 1023.6 | 11 | -2.8 | 49 | 7.2 | 360 |
| 24 | 1023.8 | 11 | -0.5 | 64 | 2.1 | 260 |
| 25 | 1018.1 | 11 | -1.8 | 84 | 1.9 | 170 |
| 26 | 1016.9 | 11 | -1.7 | 87 | 0.8 | 200 |
| 27 | 1015.8 | 11 | 1.5 | 74 | 1.8 | 270 |
| 28 | 1017.4 | 11 | -3.9 | 79 | 0.6 | 250 |