Great Lakes Average Ice Concentration ------------------------------------------------ Ice Concentration (%) Year Day Sup. Mich. Huron Erie Ont. ------------------------------------------------ 2010 341 0.6501 0.2199 0.4271 0.0000 0.0000 2010 343 1.3173 0.9163 3.5918 1.1571 0.7452 2010 348 1.4715 2.5227 5.8553 1.0656 1.0354 2010 350 3.1722 5.3166 11.0111 15.4415 1.3999 2010 351 2.2598 3.5336 11.2470 17.2335 1.8466 2010 352 2.7268 11.8415 11.0021 18.0220 1.8338 2010 353 2.7103 3.0231 10.7437 18.5550 1.6364 2010 354 3.9261 5.7023 10.5335 19.0884 1.7502 2010 355 4.1464 9.4742 13.2587 23.6426 1.9477 2010 356 3.3021 6.0536 12.2199 22.3304 1.1331 2010 357 2.9628 6.2158 10.0100 17.1513 1.9927 2010 358 2.0944 4.5797 10.1522 15.6364 1.0735 2010 359 2.1130 4.6019 10.4142 15.6636 1.0808 2010 360 1.7912 5.3369 9.8739 19.8252 1.1028 2010 361 1.7627 4.1977 9.3007 18.8138 1.1203 2010 362 3.4587 9.7613 13.4519 21.5753 1.4500 2010 363 2.6198 8.5610 14.3519 19.8837 1.3967 2010 364 2.9952 8.8141 13.8374 31.3499 5.4991 2010 365 2.9720 7.7356 12.3096 29.7549 5.6662 2011 01 2.9657 5.1264 12.3316 28.4247 3.9536 2011 02 2.8162 5.7419 12.4185 20.0646 3.8026 2011 03 3.0810 8.9084 7.3268 12.9503 1.8669 2011 04 4.7894 13.3447 9.3489 18.7865 3.0556 2011 05 2.8371 7.4533 9.5504 11.9826 1.1387 2011 06 3.5792 10.4432 12.8424 26.9776 1.6088 2011 07 2.6863 9.5037 11.2446 28.2543 1.5859 2011 08 3.2494 12.1752 13.0646 25.3435 1.6520 2011 09 4.5302 13.2954 15.0384 34.1569 1.3811 2011 10 6.4179 14.7786 19.0563 44.1921 2.7961 2011 11 7.3355 20.3405 24.8861 45.4454 1.5372 2011 12 7.5499 14.7344 20.5737 55.3363 3.7236 2011 13 4.8846 16.4730 19.9956 62.2059 2.2998 2011 14 6.5757 17.9200 23.5368 65.2372 1.9752 2011 15 7.6467 14.7183 28.0965 68.6379 9.1433 2011 16 7.0226 16.0889 24.2055 65.8768 9.0643 2011 17 8.7231 20.0457 31.5216 69.1286 4.1589 2011 18 7.9626 19.1062 27.3869 80.9788 15.0165 2011 19 5.7038 19.4437 26.2785 72.1255 7.4683 2011 20 11.2997 23.2110 28.2542 78.7707 11.6125 2011 21 10.4032 21.6243 35.4123 75.7534 12.0110 2011 22 12.2062 23.7338 31.7472 76.8344 11.1203 2011 23 10.4702 23.6935 41.8846 87.7798 14.8815 2011 24 16.3038 26.8227 48.8343 87.0964 21.4628 2011 25 15.2837 26.8793 49.0036 89.5826 19.5712 2011 26 11.1191 21.4503 36.8493 85.2911 17.8200 2011 27 12.5383 22.4496 40.5002 88.4883 18.1001 2011 28 9.5455 21.5327 39.5445 81.7321 17.6575 2011 29 10.3113 19.6986 45.9431 83.1505 18.0468 2011 30 15.2609 19.6255 49.1037 84.1246 20.2039 2011 31 16.5103 26.3136 52.8074 89.1630 19.2938 2011 32 18.5760 24.8318 59.7219 95.7810 23.3967 2011 33 24.8503 26.1662 52.6024 85.0506 26.0863 2011 34 20.4759 27.6667 47.8913 86.8832 16.7254 2011 35 15.0197 26.5840 43.0638 86.9751 20.6345 2011 36 10.4218 21.1689 39.3606 89.0977 19.3572 2011 37 6.5827 21.7186 39.1795 89.0417 17.4059 2011 38 8.3739 25.1277 44.2633 87.5860 16.3535 2011 39 9.1769 25.9448 47.3151 94.0891 13.6410 2011 40 16.7883 23.5930 46.1191 83.2273 12.9559 2011 41 13.4094 23.8932 50.0859 91.4016 19.4174 2011 42 26.0333 29.3345 49.3953 90.4601 20.2130 2011 43 28.2154 28.5437 55.7999 90.4221 20.2452 2011 44 19.6994 22.9054 54.6737 90.1149 23.3489 2011 45 14.5961 16.3602 33.8256 76.1927 9.2066 2011 46 10.7027 13.7390 32.3739 74.3654 8.9128 2011 47 15.3227 17.1641 40.0699 79.1702 14.2782 2011 48 10.7706 15.0677 40.7072 76.6822 18.1414 2011 49 7.6730 12.7977 38.8352 72.8935 9.2443 2011 50 6.1256 11.5043 21.3324 57.8566 9.2911 2011 51 12.4547 11.6141 20.8190 56.5824 8.8549 2011 52 15.8866 13.4831 36.5002 59.0546 13.8953 2011 53 14.3927 16.1058 44.5813 73.2248 15.7351 2011 54 23.3704 22.2948 52.1114 78.1401 26.0505 2011 55 17.1898 20.8130 63.7231 89.8923 32.1956 2011 56 11.4017 15.9552 60.7872 84.2215 16.4288 2011 57 15.2507 15.3077 48.0951 76.1963 16.1276 2011 58 25.0797 16.2653 48.4307 76.2293 14.7934 2011 59 20.8019 18.2483 58.3901 85.5639 11.6419 2011 60 21.3691 18.4278 60.0214 93.5916 11.0698 2011 61 14.1858 16.1259 49.4184 77.7561 8.5803 2011 62 19.3987 13.6761 54.0058 77.7274 8.2231 2011 63 27.2623 11.2865 51.7878 74.4785 10.9027 2011 64 27.2669 11.3077 51.8485 74.5553 10.9045 2011 65 22.5306 11.3271 52.3708 66.3657 10.6749 2011 66 27.5477 17.5968 55.0936 69.0288 8.8916 2011 67 29.2611 19.2175 49.7545 73.3178 11.3269 2011 68 23.5377 13.4324 61.2869 72.6689 8.4426 2011 69 19.6709 13.6429 45.9852 62.1772 7.8751 2011 70 17.6462 13.0661 41.5580 61.5806 4.9780 2011 71 17.0712 13.2089 39.7030 59.3633 4.6501 2011 72 17.0683 13.2292 39.7177 59.3274 4.6575 2011 73 12.2141 11.7857 30.8749 59.6511 6.1653 2011 74 12.2362 12.4279 52.5948 67.1362 6.3659 2011 75 11.9341 10.6062 35.9809 55.3155 6.5698 2011 76 11.2918 9.9531 40.6122 54.5345 3.7461 2011 77 14.2656 9.1429 40.8848 53.5500 2.2557 2011 78 13.6567 9.8499 42.3313 52.8763 2.3517 2011 79 8.8220 9.0701 30.5099 39.7165 2.6336 2011 80 8.8181 8.1370 37.6300 49.5313 1.5051 2011 81 8.3006 7.9760 30.2111 37.7726 1.3756 2011 82 5.2095 7.4053 24.0227 36.7188 1.0753 2011 83 5.3949 6.6838 22.0779 31.4163 0.7819 2011 84 9.3752 9.4954 31.2669 44.3708 0.7906 2011 85 11.8339 11.0451 29.4088 51.2232 0.7778 2011 86 11.2432 9.9317 30.2527 33.4211 1.0239 2011 87 13.9613 7.6082 33.2423 30.6324 0.7052 2011 88 18.1029 7.6934 32.5344 17.2001 0.5758 2011 89 14.3367 8.4764 45.8931 17.7188 0.5758 2011 90 30.0727 7.9725 31.2060 17.3695 0.4628 2011 91 32.2308 3.4076 30.8787 15.9371 1.4711 2011 92 33.6443 8.3614 32.5181 15.9414 1.4711 2011 93 23.0105 7.8141 25.5548 13.2223 1.4582 2011 94 4.5492 6.2874 19.2735 9.3245 0.0817 2011 95 3.4902 5.4030 16.4951 9.0769 0.0321 2011 96 3.1834 4.4579 13.4420 8.2356 0.0367 2011 97 6.6315 4.3644 13.2172 3.0845 0.0404 2011 98 3.3619 4.2951 13.2336 2.7012 0.0248 2011 99 4.0175 4.5330 12.9084 2.6760 0.0266 2011 100 4.0311 4.3515 14.1609 3.9839 0.0266 2011 101 2.4772 2.1173 10.3418 3.3551 0.0000 2011 102 2.1926 0.9021 7.9854 1.0979 0.0000 2011 103 2.1848 0.8503 7.4138 1.1115 0.0000 2011 104 2.0627 0.7917 7.0785 1.0329 0.0000 2011 105 1.7940 0.1406 5.9539 1.0114 0.0000 2011 106 1.4886 0.0125 5.4360 1.2641 0.0000 2011 107 1.3811 0.0000 2.8709 1.2548 0.0000 2011 108 1.2279 0.0000 1.1665 0.0840 0.0000 2011 109 4.6044 0.0000 1.1170 0.1105 0.1414 2011 110 1.2425 0.0000 0.8028 0.0309 0.0285 2011 111 1.2376 0.0000 0.6938 0.0029 0.0000 2011 112 1.2007 0.0000 0.6591 0.0036 0.0000 2011 113 1.2008 0.0000 0.7319 0.0036 0.0000 2011 114 1.1622 0.0000 0.3136 0.0000 0.0000 2011 115 1.1298 0.0000 0.1283 0.0000 0.0000 2011 116 1.0914 0.0000 0.1156 0.0000 0.0000 2011 117 1.0158 0.0000 0.0606 0.0000 0.0000 2011 118 1.0270 0.0000 0.0259 0.0000 0.0000 2011 119 1.4192 0.0000 0.4335 0.0000 0.0000 2011 120 0.9497 0.0000 0.0000 0.0000 0.0000