指定気圧面の観測データ（日ごとの値）
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札幌 1993年4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 | 1002.0 | 19 | 6.0 | 94 | 1.7 | 270 |
| 2 | 1008.3 | 19 | 4.3 | 76 | 0.3 | 300 |
| 3 | 1008.4 | 19 | 7.4 | 62 | 0.3 | 220 |
| 4 | 1009.2 | 19 | 3.6 | 46 | 2.0 | 210 |
| 5 | 1008.8 | 19 | 1.1 | 91 | 4.2 | 310 |
| 6 | 1006.8 | 19 | 1.9 | 54 | 5.5 | 300 |
| 7 | 1003.1 | 19 | 2.5 | 67 | 1.5 | 260 |
| 8 | 1006.8 | 19 | 3.2 | 84 | 1.9 | 250 |
| 9 | 1015.3 | 19 | 0.9 | 92 | 1.0 | 70 |
| 10 | 1016.4 | 19 | 2.1 | 69 | 4.4 | 340 |
| 11 | 1014.4 | 19 | 3.9 | 80 | 2.2 | 310 |
| 12 | 1018.6 | 19 | 3.1 | 68 | 0.5 | 250 |
| 13 | 1015.1 | 19 | 7.4 | 45 | 4.0 | 220 |
| 14 | 1007.2 | 19 | 10.2 | 44 | 2.9 | 170 |
| 15 | 1004.8 | 19 | 7.0 | 47 | 1.9 | 100 |
| 16 | 999.9 | 19 | 13.7 | 28 | 1.3 | 50 |
| 17 | 993.0 | 19 | 11.2 | 64 | 1.5 | 300 |
| 18 | 1000.6 | 19 | 0.5 | 85 | 9.8 | 320 |
| 19 | 1015.7 | 19 | 3.0 | 54 | 4.1 | 320 |
| 20 | 1023.0 | 19 | 4.3 | 59 | 2.1 | 300 |
| 21 | 1017.8 | 19 | 5.6 | 55 | 2.8 | 110 |
| 22 | 1005.1 | 19 | 9.3 | 85 | 1.8 | 150 |
| 23 | 990.0 | 19 | 10.5 | 81 | 1.8 | 20 |
| 24 | 996.8 | 19 | 5.5 | 90 | 1.2 | 110 |
| 25 | 998.8 | 19 | 3.9 | 69 | 4.1 | 310 |
| 26 | 1004.8 | 19 | 10.0 | 52 | 3.4 | 120 |
| 27 | 1002.2 | 19 | 6.6 | 77 | 5.4 | 310 |
| 28 | 1014.1 | 19 | 6.8 | 46 | 0.7 | 260 |
| 29 | 1012.7 | 19 | 6.1 | 46 | 1.4 | 290 |
| 30 | 1015.1 | 19 | 6.5 | 45 | 2.2 | 120 |