Theoretical mean water (MW) validated by the Finnish Meteorological Institute (mm)
*) Change of MW mm/yr 1936 1937 1938 1939 1940
1) 2) 3) 4) NN N43 N60 N2000 NN N43 N60 N2000 NN N43 N60 N2000 NN N43 N60 N2000 NN N43 N60 N2000
Kemi 7.30 7.35 4.35 6.17 -131 99 241 652 -138 92 234 645 -145 85 227 638 -153 77 219 630 -160 70 212 623
Oulu 7.10 6.90 3.90 5.84 -118 101 229 628 -125 94 222 621 -132 87 215 614 -139 80 208 607 -146 73 201 600
Raahe 7.80 7.42 4.42 4.21 -145 114 224 649 -153 106 216 641 -160 99 209 634 -168 91 201 626 -176 83 193 618
Pietarsaari 8.20 8.01 5.01 4.28 -174 76 221 661 -182 68 213 653 -191 59 204 644 -199 51 196 636 -207 43 188 628
Vaasa 8.00 7.74 4.74 4.43 -144 93 220 654 -152 85 212 646 -160 77 204 638 -168 69 196 630 -176 61 188 622
Kaskinen 7.40 7.25 4.25 3.96 -122 76 205 630 -130 68 197 622 -137 61 190 615 -145 53 182 607 -152 46 175 600
Mäntyluoto 6.40 6.37 3.37 3.05 -110 50 186 570 -117 43 179 563 -123 37 173 557 -130 30 166 550 -136 24 160 544
Rauma 5.90 5.45 2.45 2.33 -98 37 175 516 -104 31 169 510 -110 25 163 504 -116 19 157 498 -122 13 151 492
Turku 4.40 4.14 1.14 0.93 -35 48 131 423 -40 43 126 418 -44 39 122 414 -49 34 117 409 -53 30 113 405
Föglö 4.60 4.27 1.27 1.13 -43 48 132 405 -47 44 128 401 -52 39 123 396 -56 35 119 392 -61 30 114 387
Hanko 3.10 2.73 -0.27 -0.39 13 40 89 341 10 37 86 338 7 34 83 335 4 31 80 332 1 28 77 329
Helsinki 2.50 2.14 -0.86 -0.99 16 16 66 318 14 14 64 316 11 11 61 313 9 9 59 311 6 6 56 308
Hamina 2.20 1.69 -1.31 -1.40 28 19 82 294 26 17 80 292 23 14 77 289 21 12 75 287 19 10 73 285

*) A positive value means the zero level of the theoretical mean water is descending, a negative one it is ascending.
1) Use for data prior to 1990.
2) Use for data of 1991-1992.
3) Use for data of 1993-2005.
4) Use for data of 2006-2015.