Cumulonimbus Average Base Height (meters) December, January, February (1971 - 1996) Night, Land Areas Only Global Average: 816 Zonal Averages 28 zones Lat.N Average 77.5 541 72.5 517 67.5 598 62.5 657 57.5 688 52.5 722 47.5 698 42.5 844 37.5 939 32.5 1180 27.5 931 22.5 799 17.5 749 12.5 749 7.5 622 2.5 628 -2.5 613 -7.5 608 -12.5 917 -17.5 1000 -22.5 1141 -27.5 1398 -32.5 1222 -37.5 1184 -42.5 1145 -47.5 797 -52.5 668 -62.5 640 Grid Box Averages 507 boxes filled with min 30 obs. Box # Lat.N Lon.E Average N.Obs. 11 77.5 10.0 587 444 12 77.5 30.0 461 244 14 77.5 70.0 443 44 29 72.5 10.0 566 805 30 72.5 30.0 519 3779 31 72.5 50.0 481 472 32 72.5 70.0 434 84 34 72.5 110.0 734 41 46 72.5 -10.0 469 349 48 67.5 15.0 597 6127 49 67.5 25.0 680 724 50 67.5 35.0 561 11303 51 67.5 45.0 487 3551 52 67.5 55.0 514 1497 53 67.5 65.0 445 1199 54 67.5 75.0 649 170 55 67.5 85.0 585 690 56 67.5 95.0 1110 159 65 67.5 -175.0 806 33 66 67.5 -165.0 350 47 77 67.5 -55.0 1763 75 80 67.5 -25.0 588 692 81 67.5 -15.0 855 941 83 62.5 5.0 613 5363 84 62.5 15.0 567 2491 85 62.5 25.0 590 338 86 62.5 35.0 520 2650 87 62.5 45.0 501 3035 88 62.5 55.0 515 1199 89 62.5 65.0 795 339 90 62.5 75.0 604 661 91 62.5 85.0 836 885 92 62.5 95.0 833 1272 93 62.5 105.0 812 210 94 62.5 115.0 787 289 95 62.5 125.0 885 169 96 62.5 135.0 859 35 97 62.5 145.0 1061 53 98 62.5 155.0 838 163 99 62.5 165.0 703 2503 100 62.5 175.0 618 438 101 62.5 -175.0 580 173 113 62.5 -55.0 681 34 116 62.5 -25.0 477 1228 117 62.5 -15.0 689 46 118 62.5 -5.0 444 2300 119 57.5 5.0 671 3179 120 57.5 15.0 488 2939 121 57.5 25.0 512 5192 122 57.5 35.0 555 2729 123 57.5 45.0 536 1686 124 57.5 55.0 578 3040 125 57.5 65.0 747 556 126 57.5 75.0 595 1369 127 57.5 85.0 642 6709 128 57.5 95.0 796 4819 129 57.5 105.0 860 4333 130 57.5 115.0 1241 2351 131 57.5 125.0 752 483 132 57.5 135.0 854 155 133 57.5 145.0 860 474 134 57.5 155.0 650 3341 135 57.5 165.0 577 4163 154 57.5 -5.0 504 4826 155 52.5 5.0 529 2640 156 52.5 15.0 586 4794 157 52.5 25.0 567 3506 158 52.5 35.0 506 2372 159 52.5 45.0 525 1879 160 52.5 55.0 556 861 161 52.5 65.0 712 218 162 52.5 75.0 629 1285 163 52.5 85.0 829 5670 164 52.5 95.0 1094 2606 165 52.5 105.0 904 7966 166 52.5 115.0 1102 1563 167 52.5 125.0 1079 67 168 52.5 135.0 858 1651 169 52.5 145.0 670 7456 170 52.5 155.0 680 7218 177 52.5 -135.0 592 313 178 52.5 -125.0 671 158 189 52.5 -15.0 749 340 190 52.5 -5.0 576 4707 191 47.5 2.5 598 261 192 47.5 7.5 652 246 193 47.5 12.5 1031 139 194 47.5 17.5 758 180 195 47.5 22.5 711 1697 196 47.5 27.5 662 2045 197 47.5 32.5 630 2451 198 47.5 37.5 603 2560 199 47.5 42.5 531 2697 200 47.5 47.5 862 95 201 47.5 52.5 1003 47 202 47.5 57.5 849 69 203 47.5 62.5 960 133 204 47.5 67.5 836 102 205 47.5 72.5 772 129 206 47.5 77.5 707 524 207 47.5 82.5 877 627 208 47.5 87.5 742 405 211 47.5 102.5 1112 31 212 47.5 107.5 1212 41 217 47.5 132.5 823 483 218 47.5 137.5 775 3528 219 47.5 142.5 671 10687 220 47.5 147.5 774 1305 221 47.5 152.5 746 5076 238 47.5 -122.5 517 33 261 47.5 -7.5 641 355 262 47.5 -2.5 626 1953 263 42.5 2.5 741 159 264 42.5 7.5 742 568 265 42.5 12.5 597 453 266 42.5 17.5 848 460 267 42.5 22.5 1137 407 268 42.5 27.5 924 400 269 42.5 32.5 863 751 270 42.5 37.5 850 2353 271 42.5 42.5 756 4301 272 42.5 47.5 870 464 273 42.5 52.5 793 465 274 42.5 57.5 803 398 275 42.5 62.5 998 160 276 42.5 67.5 951 787 277 42.5 72.5 1119 535 278 42.5 77.5 1021 1495 279 42.5 82.5 1245 105 288 42.5 127.5 1043 91 289 42.5 132.5 920 1487 291 42.5 142.5 810 174 292 42.5 147.5 763 1951 333 42.5 -7.5 558 1367 334 42.5 -2.5 644 603 335 37.5 2.5 708 422 336 37.5 7.5 725 1909 337 37.5 12.5 701 969 338 37.5 17.5 660 443 339 37.5 22.5 654 556 340 37.5 27.5 716 594 341 37.5 32.5 906 283 342 37.5 37.5 850 492 343 37.5 42.5 1047 42 344 37.5 47.5 889 765 345 37.5 52.5 921 589 346 37.5 57.5 846 570 347 37.5 62.5 938 727 348 37.5 67.5 1023 2825 349 37.5 72.5 988 3204 350 37.5 77.5 1689 34 353 37.5 92.5 1229 85 354 37.5 97.5 1369 373 355 37.5 102.5 1097 302 360 37.5 127.5 893 157 362 37.5 137.5 760 145 363 37.5 142.5 1200 261 388 37.5 -92.5 909 35 390 37.5 -82.5 706 32 400 37.5 -32.5 637 98 401 37.5 -27.5 562 477 405 37.5 -7.5 573 853 406 37.5 -2.5 756 367 408 32.5 7.5 1185 78 409 32.5 12.5 737 281 410 32.5 17.5 773 134 411 32.5 22.5 840 260 412 32.5 27.5 653 172 413 32.5 32.5 771 787 414 32.5 37.5 801 461 416 32.5 47.5 1085 595 418 32.5 57.5 921 124 421 32.5 72.5 1119 212 422 32.5 77.5 1052 51 423 32.5 82.5 1581 196 424 32.5 87.5 1590 135 425 32.5 92.5 1730 1188 426 32.5 97.5 1315 3719 427 32.5 102.5 1491 1598 428 32.5 107.5 1439 64 429 32.5 112.5 951 62 430 32.5 117.5 978 33 432 32.5 127.5 904 461 460 32.5 -92.5 442 55 461 32.5 -87.5 421 55 462 32.5 -82.5 557 76 475 32.5 -17.5 495 213 477 32.5 -7.5 542 827 478 32.5 -2.5 748 251 486 27.5 37.5 817 43 487 27.5 42.5 1118 51 489 27.5 52.5 926 263 490 27.5 57.5 789 82 491 27.5 62.5 955 72 493 27.5 72.5 1152 40 494 27.5 77.5 947 235 495 27.5 82.5 827 122 496 27.5 87.5 1127 463 497 27.5 92.5 1364 635 498 27.5 97.5 743 637 499 27.5 102.5 1161 398 500 27.5 107.5 943 363 501 27.5 112.5 833 684 502 27.5 117.5 882 250 503 27.5 122.5 761 93 527 27.5 -117.5 1045 48 531 27.5 -97.5 585 31 534 27.5 -82.5 639 56 535 27.5 -77.5 556 165 558 22.5 37.5 1226 35 559 22.5 42.5 798 41 560 22.5 47.5 938 33 562 22.5 57.5 855 48 566 22.5 77.5 886 201 567 22.5 82.5 854 123 568 22.5 87.5 868 145 569 22.5 92.5 553 294 570 22.5 97.5 935 350 571 22.5 102.5 1055 332 572 22.5 107.5 739 270 573 22.5 112.5 734 367 574 22.5 117.5 848 103 575 22.5 122.5 821 174 602 22.5 -102.5 515 88 605 22.5 -87.5 739 40 606 22.5 -82.5 632 402 607 22.5 -77.5 593 242 608 22.5 -72.5 535 160 631 17.5 42.5 1024 51 637 17.5 72.5 837 36 638 17.5 77.5 854 71 641 17.5 92.5 616 76 642 17.5 97.5 789 259 643 17.5 102.5 809 244 645 17.5 112.5 785 42 646 17.5 117.5 484 31 647 17.5 122.5 625 51 674 17.5 -102.5 590 31 675 17.5 -97.5 845 110 676 17.5 -92.5 721 50 677 17.5 -87.5 745 393 678 17.5 -82.5 617 149 679 17.5 -77.5 751 350 680 17.5 -72.5 509 92 681 17.5 -67.5 555 164 682 17.5 -62.5 660 41 691 17.5 -17.5 1649 41 695 12.5 2.5 959 52 702 12.5 37.5 767 127 710 12.5 77.5 791 172 711 12.5 82.5 520 41 713 12.5 92.5 627 151 714 12.5 97.5 776 551 715 12.5 102.5 785 390 716 12.5 107.5 806 71 719 12.5 122.5 500 895 720 12.5 127.5 460 470 723 12.5 142.5 398 65 748 12.5 -92.5 1457 39 749 12.5 -87.5 1042 192 750 12.5 -82.5 980 114 751 12.5 -77.5 1206 34 752 12.5 -72.5 623 116 753 12.5 -67.5 599 204 754 12.5 -62.5 423 273 766 12.5 -2.5 1295 87 767 7.5 2.5 582 372 768 7.5 7.5 781 113 769 7.5 12.5 805 143 774 7.5 37.5 778 207 781 7.5 72.5 781 61 782 7.5 77.5 627 379 783 7.5 82.5 545 182 786 7.5 97.5 604 1885 787 7.5 102.5 527 1298 788 7.5 107.5 606 48 790 7.5 117.5 467 375 791 7.5 122.5 511 648 792 7.5 127.5 491 322 793 7.5 132.5 447 154 794 7.5 137.5 451 160 797 7.5 152.5 459 54 798 7.5 157.5 493 49 800 7.5 167.5 446 48 824 7.5 -72.5 495 438 826 7.5 -62.5 453 139 827 7.5 -57.5 584 192 836 7.5 -12.5 700 61 837 7.5 -7.5 672 247 838 7.5 -2.5 598 387 840 2.5 7.5 507 2090 841 2.5 12.5 635 824 842 2.5 17.5 1119 60 843 2.5 22.5 1120 43 845 2.5 32.5 763 584 846 2.5 37.5 743 718 847 2.5 42.5 1012 65 853 2.5 72.5 459 89 858 2.5 97.5 527 3516 859 2.5 102.5 430 4339 861 2.5 112.5 401 1167 862 2.5 117.5 655 65 863 2.5 122.5 622 385 864 2.5 127.5 461 437 873 2.5 172.5 454 768 879 2.5 -157.5 457 162 895 2.5 -77.5 847 64 898 2.5 -62.5 517 87 899 2.5 -57.5 580 177 900 2.5 -52.5 428 80 909 2.5 -7.5 579 465 910 2.5 -2.5 551 77 912 -2.5 7.5 472 376 913 -2.5 12.5 627 3798 914 -2.5 17.5 720 657 916 -2.5 27.5 731 319 917 -2.5 32.5 654 1098 918 -2.5 37.5 711 1145 919 -2.5 42.5 637 98 922 -2.5 57.5 640 535 931 -2.5 102.5 498 2527 932 -2.5 107.5 516 872 933 -2.5 112.5 614 170 934 -2.5 117.5 642 754 935 -2.5 122.5 553 343 936 -2.5 127.5 515 210 937 -2.5 132.5 495 389 938 -2.5 137.5 461 469 939 -2.5 142.5 478 111 940 -2.5 147.5 541 46 941 -2.5 152.5 598 41 946 -2.5 177.5 460 453 966 -2.5 -82.5 1314 33 970 -2.5 -62.5 476 68 972 -2.5 -52.5 452 60 985 -7.5 12.5 589 108 989 -7.5 32.5 675 189 990 -7.5 37.5 578 906 997 -7.5 72.5 493 89 1004 -7.5 107.5 570 1892 1005 -7.5 112.5 662 1361 1006 -7.5 117.5 601 1312 1007 -7.5 122.5 516 453 1008 -7.5 127.5 563 119 1009 -7.5 132.5 468 217 1011 -7.5 142.5 462 149 1012 -7.5 147.5 545 570 1014 -7.5 157.5 500 629 1015 -7.5 162.5 492 459 1018 -7.5 177.5 463 3291 1020 -7.5 -172.5 693 1170 1023 -7.5 -157.5 502 50 1027 -7.5 -137.5 495 80 1039 -7.5 -77.5 1317 104 1042 -7.5 -62.5 871 51 1045 -7.5 -47.5 825 189 1048 -7.5 -32.5 848 52 1057 -12.5 12.5 539 153 1058 -12.5 17.5 789 153 1059 -12.5 22.5 1271 77 1060 -12.5 27.5 1128 244 1061 -12.5 32.5 1085 446 1062 -12.5 37.5 702 460 1063 -12.5 42.5 788 516 1064 -12.5 47.5 650 2102 1065 -12.5 52.5 782 609 1066 -12.5 57.5 552 385 1074 -12.5 97.5 539 99 1079 -12.5 122.5 484 230 1081 -12.5 132.5 717 327 1082 -12.5 137.5 515 142 1083 -12.5 142.5 698 406 1087 -12.5 162.5 517 322 1088 -12.5 167.5 595 244 1090 -12.5 177.5 498 1151 1091 -12.5 -177.5 404 1180 1092 -12.5 -172.5 581 524 1093 -12.5 -167.5 506 224 1094 -12.5 -162.5 560 51 1097 -12.5 -147.5 450 154 1114 -12.5 -62.5 623 357 1115 -12.5 -57.5 1284 254 1117 -12.5 -47.5 948 60 1129 -17.5 12.5 1143 63 1130 -17.5 17.5 1391 1612 1131 -17.5 22.5 1172 589 1132 -17.5 27.5 1254 559 1133 -17.5 32.5 818 1040 1134 -17.5 37.5 727 810 1135 -17.5 42.5 738 1757 1136 -17.5 47.5 713 2293 1137 -17.5 52.5 628 388 1138 -17.5 57.5 501 250 1139 -17.5 62.5 576 85 1151 -17.5 122.5 835 226 1152 -17.5 127.5 1090 199 1153 -17.5 132.5 1591 126 1154 -17.5 137.5 718 157 1155 -17.5 142.5 1211 976 1156 -17.5 147.5 696 309 1160 -17.5 167.5 593 703 1162 -17.5 177.5 654 2792 1163 -17.5 -177.5 577 894 1164 -17.5 -172.5 698 690 1165 -17.5 -167.5 761 634 1166 -17.5 -162.5 560 93 1167 -17.5 -157.5 458 164 1168 -17.5 -152.5 458 194 1169 -17.5 -147.5 469 351 1170 -17.5 -142.5 468 458 1185 -17.5 -67.5 788 544 1186 -17.5 -62.5 611 536 1188 -17.5 -52.5 796 55 1189 -17.5 -47.5 787 179 1190 -17.5 -42.5 934 35 1201 -22.5 12.5 513 38 1202 -22.5 17.5 1434 1592 1203 -22.5 22.5 1169 849 1204 -22.5 27.5 1125 563 1205 -22.5 32.5 1394 230 1206 -22.5 37.5 805 39 1207 -22.5 42.5 738 1772 1208 -22.5 47.5 680 1117 1210 -22.5 57.5 534 499 1221 -22.5 112.5 1608 110 1222 -22.5 117.5 1301 121 1225 -22.5 132.5 2015 37 1226 -22.5 137.5 1691 40 1227 -22.5 142.5 1006 453 1228 -22.5 147.5 1018 403 1229 -22.5 152.5 601 232 1232 -22.5 167.5 681 439 1235 -22.5 -177.5 528 142 1239 -22.5 -157.5 523 193 1241 -22.5 -147.5 413 45 1243 -22.5 -137.5 474 289 1244 -22.5 -132.5 458 276 1257 -22.5 -67.5 1007 573 1258 -22.5 -62.5 589 92 1259 -22.5 -57.5 910 60 1260 -22.5 -52.5 665 121 1261 -22.5 -47.5 787 161 1262 -22.5 -42.5 855 94 1274 -27.5 17.5 1323 851 1275 -27.5 22.5 1580 2595 1276 -27.5 27.5 1424 1433 1277 -27.5 32.5 728 475 1280 -27.5 47.5 676 204 1293 -27.5 112.5 1213 145 1294 -27.5 117.5 2040 68 1296 -27.5 127.5 1967 166 1297 -27.5 132.5 1770 75 1298 -27.5 137.5 1323 73 1299 -27.5 142.5 1350 313 1300 -27.5 147.5 1455 361 1301 -27.5 152.5 703 35 1307 -27.5 -177.5 443 41 1314 -27.5 -142.5 491 46 1329 -27.5 -67.5 1236 930 1330 -27.5 -62.5 943 858 1331 -27.5 -57.5 949 2145 1332 -27.5 -52.5 854 186 1333 -27.5 -47.5 571 99 1346 -32.5 17.5 992 185 1347 -32.5 22.5 1146 1479 1348 -32.5 27.5 1114 961 1349 -32.5 32.5 555 35 1366 -32.5 117.5 1049 276 1367 -32.5 122.5 1838 80 1368 -32.5 127.5 1717 80 1370 -32.5 137.5 1526 75 1371 -32.5 142.5 1572 64 1372 -32.5 147.5 1542 233 1373 -32.5 152.5 970 125 1377 -32.5 172.5 332 123 1401 -32.5 -67.5 1263 6906 1402 -32.5 -62.5 992 3269 1403 -32.5 -57.5 944 2518 1404 -32.5 -52.5 891 206 1442 -37.5 137.5 506 68 1443 -37.5 142.5 1249 109 1444 -37.5 147.5 1132 306 1445 -37.5 152.5 609 90 1449 -37.5 172.5 615 112 1450 -37.5 177.5 759 79 1472 -37.5 -72.5 931 31 1473 -37.5 -67.5 1333 1459 1474 -37.5 -62.5 1061 2315 1475 -37.5 -57.5 966 693 1516 -42.5 147.5 765 212 1521 -42.5 172.5 815 442 1522 -42.5 177.5 630 35 1523 -42.5 -177.5 491 58 1544 -42.5 -72.5 1075 108 1545 -42.5 -67.5 1393 463 1546 -42.5 -62.5 1111 468 1566 -47.5 37.5 558 36 1569 -47.5 52.5 404 34 1592 -47.5 167.5 507 361 1616 -47.5 -72.5 899 137 1617 -47.5 -67.5 973 261 1646 -52.5 155.0 523 56 1647 -52.5 165.0 603 124 1659 -52.5 -75.0 634 361 1660 -52.5 -65.0 935 165 1661 -52.5 -55.0 539 142 1733 -62.5 -55.0 640 102