Cumulonimbus Average Base Height (meters) September, October, November (1971 - 1996) Night, Land Areas Only Global Average: 812 Zonal Averages 29 zones Lat.N Average 82.5 562 77.5 504 72.5 526 67.5 681 62.5 729 57.5 745 52.5 813 47.5 862 42.5 1066 37.5 1078 32.5 1169 27.5 873 22.5 838 17.5 757 12.5 897 7.5 738 2.5 691 -2.5 597 -7.5 706 -12.5 1061 -17.5 1104 -22.5 1164 -27.5 1258 -32.5 1043 -37.5 1007 -42.5 1001 -47.5 771 -52.5 614 -62.5 715 Grid Box Averages 601 boxes filled with min 30 obs. Box # Lat.N Lon.E Average N.Obs. 2 82.5 20.0 486 32 3 82.5 60.0 587 127 11 77.5 10.0 569 672 12 77.5 30.0 414 285 14 77.5 70.0 443 427 15 77.5 90.0 477 459 16 77.5 110.0 495 365 17 77.5 130.0 465 136 29 72.5 10.0 563 1037 30 72.5 30.0 541 5042 31 72.5 50.0 488 876 32 72.5 70.0 530 971 33 72.5 90.0 497 525 34 72.5 110.0 578 684 35 72.5 130.0 552 1014 36 72.5 150.0 480 381 37 72.5 170.0 686 79 38 72.5 -170.0 498 104 46 72.5 -10.0 417 377 48 67.5 15.0 650 9535 49 67.5 25.0 696 2092 50 67.5 35.0 568 17104 51 67.5 45.0 518 5922 52 67.5 55.0 570 4161 53 67.5 65.0 513 3315 54 67.5 75.0 548 1428 55 67.5 85.0 580 3542 56 67.5 95.0 915 1722 57 67.5 105.0 827 499 58 67.5 115.0 770 339 59 67.5 125.0 675 691 60 67.5 135.0 939 345 61 67.5 145.0 802 99 62 67.5 155.0 723 539 63 67.5 165.0 766 275 64 67.5 175.0 580 311 65 67.5 -175.0 578 634 66 67.5 -165.0 531 242 77 67.5 -55.0 1020 104 80 67.5 -25.0 601 694 81 67.5 -15.0 897 788 83 62.5 5.0 670 10098 84 62.5 15.0 641 6122 85 62.5 25.0 643 2732 86 62.5 35.0 566 7086 87 62.5 45.0 521 5625 88 62.5 55.0 571 4034 89 62.5 65.0 731 2497 90 62.5 75.0 626 2205 91 62.5 85.0 755 3944 92 62.5 95.0 811 6559 93 62.5 105.0 786 2237 94 62.5 115.0 754 2437 95 62.5 125.0 808 2307 96 62.5 135.0 890 1849 97 62.5 145.0 1160 1241 98 62.5 155.0 935 1072 99 62.5 165.0 681 3565 100 62.5 175.0 610 828 101 62.5 -175.0 600 368 116 62.5 -25.0 531 599 118 62.5 -5.0 443 2231 119 57.5 5.0 701 6955 120 57.5 15.0 601 6210 121 57.5 25.0 605 9379 122 57.5 35.0 614 5673 123 57.5 45.0 598 5357 124 57.5 55.0 660 8588 125 57.5 65.0 713 4168 126 57.5 75.0 663 6017 127 57.5 85.0 647 18719 128 57.5 95.0 802 17221 129 57.5 105.0 868 10695 130 57.5 115.0 1125 7820 131 57.5 125.0 732 3933 132 57.5 135.0 853 1758 133 57.5 145.0 830 1522 134 57.5 155.0 643 4934 135 57.5 165.0 602 3457 154 57.5 -5.0 529 4458 155 52.5 5.0 583 6050 156 52.5 15.0 684 7682 157 52.5 25.0 638 4802 158 52.5 35.0 622 5959 159 52.5 45.0 645 5062 160 52.5 55.0 792 4675 161 52.5 65.0 824 2734 162 52.5 75.0 739 5554 163 52.5 85.0 844 18756 164 52.5 95.0 1000 14048 165 52.5 105.0 917 18032 166 52.5 115.0 1047 7428 167 52.5 125.0 864 4416 168 52.5 135.0 845 13763 169 52.5 145.0 688 13258 170 52.5 155.0 653 5907 177 52.5 -135.0 600 487 178 52.5 -125.0 723 187 179 52.5 -115.0 1171 39 180 52.5 -105.0 1431 90 181 52.5 -95.0 1053 50 189 52.5 -15.0 765 297 190 52.5 -5.0 594 4867 191 47.5 2.5 744 609 192 47.5 7.5 704 1208 193 47.5 12.5 875 1274 194 47.5 17.5 970 686 195 47.5 22.5 861 3501 196 47.5 27.5 750 3477 197 47.5 32.5 740 4612 198 47.5 37.5 766 5522 199 47.5 42.5 688 5684 200 47.5 47.5 809 880 201 47.5 52.5 842 353 202 47.5 57.5 914 944 203 47.5 62.5 914 669 204 47.5 67.5 912 467 205 47.5 72.5 819 902 206 47.5 77.5 863 1230 207 47.5 82.5 1132 2820 208 47.5 87.5 1025 2333 209 47.5 92.5 1112 150 210 47.5 97.5 913 66 211 47.5 102.5 994 503 212 47.5 107.5 1166 245 213 47.5 112.5 936 227 214 47.5 117.5 1001 567 215 47.5 122.5 1063 341 216 47.5 127.5 997 463 217 47.5 132.5 846 4342 218 47.5 137.5 772 8025 219 47.5 142.5 686 11591 220 47.5 147.5 783 769 221 47.5 152.5 741 2353 238 47.5 -122.5 652 47 242 47.5 -102.5 1368 46 243 47.5 -97.5 1417 71 244 47.5 -92.5 743 95 245 47.5 -87.5 711 42 246 47.5 -82.5 719 43 261 47.5 -7.5 649 356 262 47.5 -2.5 637 2007 263 42.5 2.5 704 944 264 42.5 7.5 707 1562 265 42.5 12.5 634 1288 266 42.5 17.5 850 875 267 42.5 22.5 1076 1237 268 42.5 27.5 868 1593 269 42.5 32.5 964 820 270 42.5 37.5 958 2817 271 42.5 42.5 937 9852 272 42.5 47.5 935 2751 273 42.5 52.5 1037 680 274 42.5 57.5 989 644 275 42.5 62.5 1078 326 276 42.5 67.5 1156 1042 277 42.5 72.5 1303 1966 278 42.5 77.5 1068 3039 279 42.5 82.5 1368 1353 280 42.5 87.5 1751 446 281 42.5 92.5 1697 407 282 42.5 97.5 1433 110 283 42.5 102.5 1394 165 284 42.5 107.5 921 187 285 42.5 112.5 1072 577 286 42.5 117.5 1137 418 287 42.5 122.5 1146 631 288 42.5 127.5 886 857 289 42.5 132.5 862 4606 290 42.5 137.5 710 43 291 42.5 142.5 826 195 292 42.5 147.5 771 1180 312 42.5 -112.5 1771 45 314 42.5 -102.5 1423 100 315 42.5 -97.5 1251 310 316 42.5 -92.5 1149 108 317 42.5 -87.5 961 176 318 42.5 -82.5 902 134 319 42.5 -77.5 852 80 320 42.5 -72.5 958 42 333 42.5 -7.5 618 1456 334 42.5 -2.5 668 1108 335 37.5 2.5 693 1047 336 37.5 7.5 809 2926 337 37.5 12.5 736 1701 338 37.5 17.5 649 625 339 37.5 22.5 675 784 340 37.5 27.5 742 527 341 37.5 32.5 941 301 342 37.5 37.5 879 831 343 37.5 42.5 1049 245 344 37.5 47.5 822 1666 345 37.5 52.5 877 867 346 37.5 57.5 1071 754 347 37.5 62.5 1159 486 348 37.5 67.5 1193 1753 349 37.5 72.5 1167 3089 350 37.5 77.5 1875 419 353 37.5 92.5 1418 181 354 37.5 97.5 1277 1157 355 37.5 102.5 1133 2477 356 37.5 107.5 1380 407 357 37.5 112.5 1108 194 358 37.5 117.5 1017 306 359 37.5 122.5 1107 197 360 37.5 127.5 864 618 361 37.5 132.5 606 37 362 37.5 137.5 781 75 363 37.5 142.5 934 127 385 37.5 -107.5 2078 51 386 37.5 -102.5 1524 117 387 37.5 -97.5 1202 379 388 37.5 -92.5 882 411 389 37.5 -87.5 817 102 390 37.5 -82.5 1000 143 391 37.5 -77.5 893 213 400 37.5 -32.5 650 103 401 37.5 -27.5 518 365 405 37.5 -7.5 611 1113 406 37.5 -2.5 748 1346 407 32.5 2.5 1167 173 408 32.5 7.5 1170 436 409 32.5 12.5 789 786 410 32.5 17.5 895 94 411 32.5 22.5 857 157 412 32.5 27.5 725 71 413 32.5 32.5 800 470 414 32.5 37.5 866 338 416 32.5 47.5 1035 342 418 32.5 57.5 982 45 421 32.5 72.5 1109 385 422 32.5 77.5 1129 81 423 32.5 82.5 1514 196 424 32.5 87.5 1145 376 425 32.5 92.5 1569 2318 426 32.5 97.5 1234 6258 427 32.5 102.5 1294 4172 428 32.5 107.5 1353 236 429 32.5 112.5 1103 134 430 32.5 117.5 948 181 431 32.5 122.5 895 200 432 32.5 127.5 848 264 433 32.5 132.5 728 52 434 32.5 137.5 609 179 456 32.5 -112.5 1882 79 457 32.5 -107.5 1469 66 458 32.5 -102.5 1057 202 459 32.5 -97.5 939 256 460 32.5 -92.5 669 249 461 32.5 -87.5 667 179 462 32.5 -82.5 924 675 466 32.5 -62.5 524 83 475 32.5 -17.5 495 138 477 32.5 -7.5 682 794 478 32.5 -2.5 900 813 479 27.5 2.5 1575 35 480 27.5 7.5 1451 54 486 27.5 37.5 1061 46 487 27.5 42.5 1184 133 489 27.5 52.5 1111 82 490 27.5 57.5 892 40 491 27.5 62.5 1057 36 493 27.5 72.5 996 96 494 27.5 77.5 832 477 495 27.5 82.5 679 725 496 27.5 87.5 965 1827 497 27.5 92.5 1045 1762 498 27.5 97.5 673 2558 499 27.5 102.5 1132 2535 500 27.5 107.5 992 630 501 27.5 112.5 1021 691 502 27.5 117.5 1075 963 503 27.5 122.5 696 549 515 27.5 -177.5 670 105 527 27.5 -117.5 758 34 528 27.5 -112.5 885 65 529 27.5 -107.5 724 82 530 27.5 -102.5 798 161 531 27.5 -97.5 633 625 532 27.5 -92.5 615 319 534 27.5 -82.5 800 913 535 27.5 -77.5 513 1049 552 22.5 7.5 1472 75 558 22.5 37.5 1461 89 559 22.5 42.5 880 107 562 22.5 57.5 1081 31 564 22.5 67.5 1028 43 565 22.5 72.5 859 103 566 22.5 77.5 816 584 567 22.5 82.5 725 766 568 22.5 87.5 644 1840 569 22.5 92.5 505 3075 570 22.5 97.5 858 2721 571 22.5 102.5 1074 2383 572 22.5 107.5 802 2286 573 22.5 112.5 751 2448 574 22.5 117.5 784 802 575 22.5 122.5 587 937 581 22.5 152.5 659 34 601 22.5 -107.5 769 83 602 22.5 -102.5 700 552 603 22.5 -97.5 517 316 605 22.5 -87.5 703 174 606 22.5 -82.5 639 4060 607 22.5 -77.5 661 1244 608 22.5 -72.5 523 521 624 17.5 7.5 1471 139 630 17.5 37.5 921 135 631 17.5 42.5 981 183 637 17.5 72.5 672 690 638 17.5 77.5 747 832 639 17.5 82.5 820 910 641 17.5 92.5 517 596 642 17.5 97.5 696 5448 643 17.5 102.5 752 5289 644 17.5 107.5 756 1665 645 17.5 112.5 713 756 646 17.5 117.5 474 366 647 17.5 122.5 597 1442 672 17.5 -112.5 561 54 674 17.5 -102.5 459 396 675 17.5 -97.5 522 1752 676 17.5 -92.5 656 545 677 17.5 -87.5 683 2321 678 17.5 -82.5 629 632 679 17.5 -77.5 730 2629 680 17.5 -72.5 493 1204 681 17.5 -67.5 506 1637 682 17.5 -62.5 497 388 691 17.5 -17.5 857 196 692 17.5 -12.5 1027 134 693 17.5 -7.5 1296 286 694 17.5 -2.5 1388 179 695 12.5 2.5 920 1445 696 12.5 7.5 1252 859 697 12.5 12.5 1074 348 698 12.5 17.5 1201 98 699 12.5 22.5 1158 196 700 12.5 27.5 1582 62 701 12.5 32.5 1693 61 702 12.5 37.5 761 648 703 12.5 42.5 834 60 709 12.5 72.5 565 197 710 12.5 77.5 702 2380 711 12.5 82.5 730 832 713 12.5 92.5 606 911 714 12.5 97.5 724 2580 715 12.5 102.5 725 6829 716 12.5 107.5 654 1302 719 12.5 122.5 514 6668 720 12.5 127.5 462 1281 723 12.5 142.5 424 361 748 12.5 -92.5 1141 683 749 12.5 -87.5 908 2413 750 12.5 -82.5 676 231 751 12.5 -77.5 596 199 752 12.5 -72.5 592 1057 753 12.5 -67.5 564 1203 754 12.5 -62.5 444 1334 755 12.5 -57.5 470 195 763 12.5 -17.5 649 638 764 12.5 -12.5 875 430 765 12.5 -7.5 1130 1025 766 12.5 -2.5 1027 1893 767 7.5 2.5 520 1933 768 7.5 7.5 626 321 769 7.5 12.5 605 1480 770 7.5 17.5 954 244 771 7.5 22.5 1128 173 772 7.5 27.5 1117 207 773 7.5 32.5 1395 48 774 7.5 37.5 749 424 775 7.5 42.5 790 125 781 7.5 72.5 747 126 782 7.5 77.5 554 1307 783 7.5 82.5 545 875 785 7.5 92.5 492 74 786 7.5 97.5 617 3530 787 7.5 102.5 540 3471 788 7.5 107.5 619 761 790 7.5 117.5 461 1542 791 7.5 122.5 509 3146 792 7.5 127.5 514 1107 793 7.5 132.5 455 318 794 7.5 137.5 452 420 797 7.5 152.5 454 94 798 7.5 157.5 539 57 800 7.5 167.5 452 183 801 7.5 172.5 447 202 823 7.5 -77.5 495 226 824 7.5 -72.5 507 1534 825 7.5 -67.5 546 560 826 7.5 -62.5 439 364 827 7.5 -57.5 591 662 828 7.5 -52.5 378 79 836 7.5 -12.5 581 454 837 7.5 -7.5 572 1581 838 7.5 -2.5 523 956 840 2.5 7.5 466 2024 841 2.5 12.5 535 1127 842 2.5 17.5 1032 371 843 2.5 22.5 1071 270 845 2.5 32.5 733 1343 846 2.5 37.5 731 1330 847 2.5 42.5 763 136 853 2.5 72.5 465 179 858 2.5 97.5 507 2465 859 2.5 102.5 430 5771 860 2.5 107.5 479 60 861 2.5 112.5 427 1934 862 2.5 117.5 576 86 863 2.5 122.5 615 540 864 2.5 127.5 476 527 873 2.5 172.5 455 736 879 2.5 -157.5 469 135 895 2.5 -77.5 776 141 896 2.5 -72.5 643 32 898 2.5 -62.5 489 175 899 2.5 -57.5 649 323 900 2.5 -52.5 481 198 909 2.5 -7.5 509 526 910 2.5 -2.5 526 97 912 -2.5 7.5 469 72 913 -2.5 12.5 595 1270 914 -2.5 17.5 722 548 916 -2.5 27.5 757 272 917 -2.5 32.5 619 1571 918 -2.5 37.5 643 1024 919 -2.5 42.5 580 105 922 -2.5 57.5 659 128 931 -2.5 102.5 521 2065 932 -2.5 107.5 530 1074 933 -2.5 112.5 645 119 934 -2.5 117.5 623 624 935 -2.5 122.5 567 217 936 -2.5 127.5 501 137 937 -2.5 132.5 473 420 938 -2.5 137.5 461 543 939 -2.5 142.5 451 165 940 -2.5 147.5 579 56 941 -2.5 152.5 682 33 946 -2.5 177.5 453 370 970 -2.5 -62.5 380 78 972 -2.5 -52.5 558 45 985 -7.5 12.5 758 31 987 -7.5 22.5 771 49 989 -7.5 32.5 889 101 990 -7.5 37.5 588 281 997 -7.5 72.5 537 68 1004 -7.5 107.5 619 1387 1005 -7.5 112.5 710 759 1006 -7.5 117.5 656 646 1007 -7.5 122.5 526 253 1008 -7.5 127.5 617 44 1009 -7.5 132.5 473 60 1011 -7.5 142.5 455 72 1012 -7.5 147.5 554 190 1014 -7.5 157.5 521 550 1015 -7.5 162.5 543 295 1018 -7.5 177.5 465 2897 1020 -7.5 -172.5 717 753 1023 -7.5 -157.5 573 49 1039 -7.5 -77.5 1297 31 1042 -7.5 -62.5 824 66 1043 -7.5 -57.5 639 33 1045 -7.5 -47.5 835 110 1048 -7.5 -32.5 800 53 1057 -12.5 12.5 758 36 1058 -12.5 17.5 865 65 1059 -12.5 22.5 1727 55 1060 -12.5 27.5 1560 135 1061 -12.5 32.5 1470 178 1062 -12.5 37.5 720 81 1063 -12.5 42.5 778 73 1064 -12.5 47.5 667 304 1065 -12.5 52.5 790 74 1066 -12.5 57.5 521 35 1079 -12.5 122.5 514 578 1081 -12.5 132.5 801 171 1083 -12.5 142.5 862 78 1087 -12.5 162.5 574 214 1088 -12.5 167.5 568 121 1090 -12.5 177.5 503 992 1091 -12.5 -177.5 391 822 1092 -12.5 -172.5 578 264 1093 -12.5 -167.5 520 110 1094 -12.5 -162.5 597 31 1097 -12.5 -147.5 450 53 1114 -12.5 -62.5 632 311 1115 -12.5 -57.5 1347 178 1117 -12.5 -47.5 989 79 1130 -17.5 17.5 1480 332 1131 -17.5 22.5 1289 303 1132 -17.5 27.5 1517 211 1133 -17.5 32.5 973 349 1134 -17.5 37.5 781 125 1135 -17.5 42.5 778 373 1136 -17.5 47.5 734 736 1151 -17.5 122.5 1295 41 1152 -17.5 127.5 1224 67 1153 -17.5 132.5 1857 68 1155 -17.5 142.5 1362 235 1156 -17.5 147.5 697 75 1160 -17.5 167.5 585 230 1162 -17.5 177.5 652 715 1163 -17.5 -177.5 592 366 1164 -17.5 -172.5 711 562 1165 -17.5 -167.5 759 417 1166 -17.5 -162.5 530 44 1167 -17.5 -157.5 461 32 1168 -17.5 -152.5 452 93 1169 -17.5 -147.5 452 143 1170 -17.5 -142.5 469 115 1185 -17.5 -67.5 827 327 1186 -17.5 -62.5 640 357 1188 -17.5 -52.5 835 55 1189 -17.5 -47.5 831 168 1202 -22.5 17.5 1481 185 1203 -22.5 22.5 1123 246 1204 -22.5 27.5 1126 352 1205 -22.5 32.5 1406 135 1207 -22.5 42.5 767 375 1208 -22.5 47.5 696 544 1225 -22.5 132.5 1899 56 1227 -22.5 142.5 1012 166 1228 -22.5 147.5 984 134 1229 -22.5 152.5 620 88 1232 -22.5 167.5 730 147 1235 -22.5 -177.5 548 48 1239 -22.5 -157.5 602 63 1243 -22.5 -137.5 497 81 1244 -22.5 -132.5 419 89 1257 -22.5 -67.5 1082 189 1258 -22.5 -62.5 566 92 1259 -22.5 -57.5 637 36 1260 -22.5 -52.5 689 129 1261 -22.5 -47.5 810 125 1262 -22.5 -42.5 634 59 1274 -27.5 17.5 1204 121 1275 -27.5 22.5 1517 557 1276 -27.5 27.5 1373 843 1277 -27.5 32.5 687 310 1280 -27.5 47.5 680 129 1296 -27.5 127.5 1738 77 1297 -27.5 132.5 1773 61 1298 -27.5 137.5 1226 48 1299 -27.5 142.5 1340 148 1300 -27.5 147.5 1434 119 1307 -27.5 -177.5 508 49 1329 -27.5 -67.5 1291 197 1330 -27.5 -62.5 853 457 1331 -27.5 -57.5 804 1812 1332 -27.5 -52.5 666 315 1333 -27.5 -47.5 546 66 1346 -32.5 17.5 995 63 1347 -32.5 22.5 1132 338 1348 -32.5 27.5 1059 298 1349 -32.5 32.5 574 33 1366 -32.5 117.5 710 343 1367 -32.5 122.5 1512 74 1368 -32.5 127.5 1482 76 1369 -32.5 132.5 1321 56 1370 -32.5 137.5 1448 83 1371 -32.5 142.5 1128 38 1372 -32.5 147.5 1423 86 1373 -32.5 152.5 1023 64 1377 -32.5 172.5 335 212 1401 -32.5 -67.5 1171 1480 1402 -32.5 -62.5 911 1481 1403 -32.5 -57.5 820 1682 1404 -32.5 -52.5 653 181 1430 -37.5 77.5 726 41 1442 -37.5 137.5 560 189 1443 -37.5 142.5 982 120 1444 -37.5 147.5 864 217 1445 -37.5 152.5 677 86 1449 -37.5 172.5 592 205 1450 -37.5 177.5 785 135 1473 -37.5 -67.5 1264 342 1474 -37.5 -62.5 982 664 1475 -37.5 -57.5 899 234 1516 -42.5 147.5 768 217 1521 -42.5 172.5 843 586 1522 -42.5 177.5 532 51 1523 -42.5 -177.5 548 82 1544 -42.5 -72.5 810 62 1545 -42.5 -67.5 1269 201 1546 -42.5 -62.5 1041 188 1557 -42.5 -7.5 663 61 1566 -47.5 37.5 497 37 1569 -47.5 52.5 452 61 1573 -47.5 72.5 535 48 1592 -47.5 167.5 503 410 1616 -47.5 -72.5 932 110 1617 -47.5 -67.5 1008 144 1646 -52.5 155.0 558 106 1647 -52.5 165.0 591 219 1659 -52.5 -75.0 578 312 1660 -52.5 -65.0 881 115 1661 -52.5 -55.0 414 44 1733 -62.5 -55.0 715 70