Theoretical mean water (MW) validated by the Finnish Meteorological Institute (mm)
*) Change of MW mm/yr 1926 1927 1928 1929 1930
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 -58 172 314 725 -65 165 307 718 -72 158 300 711 -80 150 292 703 -87 143 285 696
Oulu 7.10 6.90 3.90 5.84 -47 172 300 699 -54 165 293 692 -61 158 286 685 -68 151 279 678 -75 144 272 671
Raahe 7.80 7.42 4.42 4.21 -67 192 302 727 -75 184 294 719 -82 177 287 712 -90 169 279 704 -98 161 271 696
Pietarsaari 8.20 8.01 5.01 4.28 -92 158 303 743 -100 150 295 735 -109 141 286 726 -117 133 278 718 -125 125 270 710
Vaasa 8.00 7.74 4.74 4.43 -64 173 300 734 -72 165 292 726 -80 157 284 718 -88 149 276 710 -96 141 268 702
Kaskinen 7.40 7.25 4.25 3.96 -48 150 279 704 -56 142 271 696 -63 135 264 689 -71 127 256 681 -78 120 249 674
Mäntyluoto 6.40 6.37 3.37 3.05 -46 114 250 634 -53 107 243 627 -59 101 237 621 -66 94 230 614 -72 88 224 608
Rauma 5.90 5.45 2.45 2.33 -39 96 234 575 -45 90 228 569 -51 84 222 563 -57 78 216 557 -63 72 210 551
Turku 4.40 4.14 1.14 0.93 9 92 175 467 4 87 170 462 0 83 166 458 -5 78 161 453 -9 74 157 449
Föglö 4.60 4.27 1.27 1.13 3 94 178 451 -1 90 174 447 -6 85 169 442 -10 81 165 438 -15 76 160 433
Hanko 3.10 2.73 -0.27 -0.39 44 71 120 372 41 68 117 369 38 65 114 366 35 62 111 363 32 59 108 360
Helsinki 2.50 2.14 -0.86 -0.99 41 41 91 343 39 39 89 341 36 36 86 338 34 34 84 336 31 31 81 333
Hamina 2.20 1.69 -1.31 -1.40 50 41 104 316 48 39 102 314 45 36 99 311 43 34 97 309 41 32 95 307

*) 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.