Cumulonimbus Average Base Height (meters) June, July, August (1954 - 1997) Night, Ship Observations Only Global Average: 484 Zonal Averages 26 zones Lat.N Average 77.5 593 72.5 572 67.5 588 62.5 655 57.5 579 52.5 550 47.5 529 42.5 531 37.5 504 32.5 492 27.5 473 22.5 475 17.5 482 12.5 475 7.5 454 2.5 466 -2.5 477 -7.5 465 -12.5 456 -17.5 476 -22.5 527 -27.5 484 -32.5 465 -37.5 471 -42.5 543 -52.5 605 Grid Box Averages 680 filled boxes Box # Lat.N Lon.E Average 11 77.5 10.0 596 12 77.5 30.0 555 13 77.5 50.0 524 28 77.5 350.0 682 29 72.5 10.0 566 30 72.5 30.0 572 31 72.5 50.0 581 32 72.5 70.0 565 46 72.5 350.0 579 47 67.5 5.0 507 48 67.5 15.0 583 50 67.5 35.0 643 51 67.5 45.0 674 52 67.5 55.0 583 77 67.5 305.0 679 79 67.5 325.0 959 80 67.5 335.0 735 81 67.5 345.0 578 82 67.5 355.0 589 83 62.5 5.0 560 100 62.5 175.0 648 101 62.5 185.0 610 102 62.5 195.0 631 113 62.5 305.0 723 114 62.5 315.0 660 115 62.5 325.0 610 116 62.5 335.0 683 117 62.5 345.0 719 118 62.5 355.0 661 119 57.5 5.0 592 120 57.5 15.0 670 121 57.5 25.0 632 133 57.5 145.0 724 134 57.5 155.0 907 135 57.5 165.0 636 138 57.5 195.0 638 139 57.5 205.0 551 140 57.5 215.0 508 141 57.5 225.0 489 149 57.5 305.0 679 150 57.5 315.0 631 151 57.5 325.0 588 152 57.5 335.0 535 153 57.5 345.0 509 154 57.5 355.0 578 155 52.5 5.0 663 156 52.5 15.0 706 169 52.5 145.0 755 170 52.5 155.0 750 171 52.5 165.0 638 172 52.5 175.0 550 173 52.5 185.0 569 174 52.5 195.0 604 175 52.5 205.0 590 176 52.5 215.0 536 177 52.5 225.0 495 178 52.5 235.0 602 185 52.5 305.0 659 186 52.5 315.0 515 187 52.5 325.0 486 188 52.5 335.0 473 189 52.5 345.0 506 190 52.5 355.0 582 219 47.5 142.5 661 220 47.5 147.5 754 221 47.5 152.5 616 222 47.5 157.5 689 223 47.5 162.5 631 224 47.5 167.5 545 225 47.5 172.5 503 226 47.5 177.5 595 227 47.5 182.5 453 228 47.5 187.5 519 229 47.5 192.5 511 230 47.5 197.5 585 231 47.5 202.5 581 232 47.5 207.5 539 233 47.5 212.5 450 234 47.5 217.5 541 235 47.5 222.5 505 236 47.5 227.5 521 237 47.5 232.5 531 238 47.5 237.5 630 251 47.5 302.5 639 252 47.5 307.5 609 253 47.5 312.5 621 254 47.5 317.5 516 255 47.5 322.5 468 256 47.5 327.5 477 257 47.5 332.5 482 258 47.5 337.5 479 259 47.5 342.5 487 260 47.5 347.5 513 261 47.5 352.5 546 262 47.5 357.5 599 263 42.5 2.5 680 264 42.5 7.5 803 265 42.5 12.5 721 266 42.5 17.5 699 268 42.5 27.5 675 290 42.5 137.5 675 291 42.5 142.5 681 292 42.5 147.5 740 293 42.5 152.5 609 294 42.5 157.5 536 295 42.5 162.5 546 296 42.5 167.5 510 297 42.5 172.5 453 298 42.5 177.5 422 299 42.5 182.5 487 300 42.5 187.5 435 301 42.5 192.5 496 302 42.5 197.5 515 303 42.5 202.5 529 304 42.5 207.5 456 305 42.5 212.5 486 306 42.5 217.5 528 307 42.5 222.5 486 308 42.5 227.5 536 309 42.5 232.5 530 310 42.5 237.5 598 320 42.5 287.5 679 321 42.5 292.5 618 322 42.5 297.5 569 323 42.5 302.5 527 324 42.5 307.5 497 325 42.5 312.5 493 326 42.5 317.5 480 327 42.5 322.5 490 328 42.5 327.5 486 329 42.5 332.5 495 330 42.5 337.5 494 331 42.5 342.5 494 332 42.5 347.5 521 333 42.5 352.5 550 334 42.5 357.5 766 335 37.5 2.5 646 336 37.5 7.5 652 337 37.5 12.5 687 338 37.5 17.5 729 339 37.5 22.5 765 359 37.5 122.5 773 361 37.5 132.5 722 363 37.5 142.5 544 364 37.5 147.5 541 365 37.5 152.5 502 366 37.5 157.5 541 367 37.5 162.5 474 368 37.5 167.5 473 369 37.5 172.5 459 370 37.5 177.5 480 371 37.5 182.5 446 372 37.5 187.5 458 373 37.5 192.5 483 374 37.5 197.5 477 375 37.5 202.5 483 376 37.5 207.5 483 377 37.5 212.5 475 378 37.5 217.5 430 379 37.5 222.5 486 380 37.5 227.5 472 381 37.5 232.5 495 382 37.5 237.5 616 391 37.5 282.5 602 392 37.5 287.5 541 393 37.5 292.5 508 394 37.5 297.5 495 395 37.5 302.5 472 396 37.5 307.5 469 397 37.5 312.5 527 398 37.5 317.5 482 399 37.5 322.5 447 400 37.5 327.5 497 401 37.5 332.5 485 402 37.5 337.5 496 403 37.5 342.5 510 404 37.5 347.5 526 405 37.5 352.5 599 406 37.5 357.5 628 411 32.5 22.5 582 412 32.5 27.5 833 431 32.5 122.5 782 432 32.5 127.5 545 433 32.5 132.5 476 434 32.5 137.5 505 435 32.5 142.5 466 436 32.5 147.5 438 437 32.5 152.5 454 438 32.5 157.5 478 439 32.5 162.5 499 440 32.5 167.5 435 441 32.5 172.5 485 442 32.5 177.5 464 443 32.5 182.5 441 444 32.5 187.5 467 445 32.5 192.5 476 446 32.5 197.5 442 447 32.5 202.5 481 448 32.5 207.5 484 449 32.5 212.5 497 450 32.5 217.5 457 451 32.5 222.5 457 452 32.5 227.5 483 453 32.5 232.5 412 454 32.5 237.5 576 455 32.5 242.5 632 461 32.5 272.5 591 462 32.5 277.5 640 463 32.5 282.5 513 464 32.5 287.5 479 465 32.5 292.5 484 466 32.5 297.5 484 467 32.5 302.5 489 468 32.5 307.5 498 469 32.5 312.5 502 470 32.5 317.5 474 471 32.5 322.5 504 472 32.5 327.5 560 473 32.5 332.5 525 474 32.5 337.5 554 475 32.5 342.5 548 476 32.5 347.5 590 477 32.5 352.5 653 503 27.5 122.5 516 504 27.5 127.5 475 505 27.5 132.5 487 506 27.5 137.5 466 507 27.5 142.5 418 508 27.5 147.5 438 509 27.5 152.5 460 510 27.5 157.5 459 511 27.5 162.5 440 512 27.5 167.5 422 513 27.5 172.5 433 514 27.5 177.5 462 515 27.5 182.5 473 516 27.5 187.5 456 517 27.5 192.5 457 518 27.5 197.5 436 519 27.5 202.5 449 520 27.5 207.5 451 521 27.5 212.5 477 522 27.5 217.5 502 523 27.5 222.5 445 524 27.5 227.5 495 527 27.5 242.5 564 528 27.5 247.5 591 531 27.5 262.5 570 532 27.5 267.5 487 533 27.5 272.5 490 534 27.5 277.5 513 535 27.5 282.5 508 536 27.5 287.5 478 537 27.5 292.5 468 538 27.5 297.5 482 539 27.5 302.5 479 540 27.5 307.5 499 541 27.5 312.5 476 542 27.5 317.5 490 543 27.5 322.5 532 544 27.5 327.5 530 545 27.5 332.5 463 546 27.5 337.5 569 547 27.5 342.5 613 548 27.5 347.5 625 563 22.5 62.5 594 564 22.5 67.5 679 568 22.5 87.5 699 573 22.5 112.5 529 574 22.5 117.5 473 575 22.5 122.5 464 576 22.5 127.5 464 577 22.5 132.5 412 578 22.5 137.5 410 579 22.5 142.5 423 580 22.5 147.5 432 581 22.5 152.5 454 582 22.5 157.5 488 583 22.5 162.5 423 584 22.5 167.5 421 585 22.5 172.5 464 586 22.5 177.5 428 587 22.5 182.5 462 588 22.5 187.5 467 589 22.5 192.5 481 590 22.5 197.5 492 591 22.5 202.5 513 592 22.5 207.5 473 593 22.5 212.5 507 594 22.5 217.5 487 595 22.5 222.5 456 600 22.5 247.5 589 601 22.5 252.5 556 603 22.5 262.5 505 604 22.5 267.5 514 605 22.5 272.5 486 606 22.5 277.5 492 607 22.5 282.5 519 608 22.5 287.5 498 609 22.5 292.5 478 610 22.5 297.5 476 611 22.5 302.5 472 612 22.5 307.5 473 613 22.5 312.5 486 614 22.5 317.5 520 615 22.5 322.5 568 618 22.5 337.5 621 619 22.5 342.5 635 634 17.5 57.5 688 635 17.5 62.5 648 636 17.5 67.5 575 637 17.5 72.5 513 639 17.5 82.5 714 640 17.5 87.5 698 641 17.5 92.5 574 644 17.5 107.5 674 645 17.5 112.5 492 646 17.5 117.5 447 647 17.5 122.5 451 648 17.5 127.5 414 649 17.5 132.5 392 650 17.5 137.5 419 651 17.5 142.5 404 652 17.5 147.5 397 653 17.5 152.5 457 654 17.5 157.5 473 655 17.5 162.5 464 656 17.5 167.5 514 657 17.5 172.5 440 658 17.5 177.5 481 659 17.5 182.5 454 660 17.5 187.5 489 661 17.5 192.5 486 662 17.5 197.5 472 663 17.5 202.5 470 664 17.5 207.5 535 665 17.5 212.5 500 666 17.5 217.5 439 668 17.5 227.5 491 671 17.5 242.5 461 672 17.5 247.5 469 673 17.5 252.5 468 674 17.5 257.5 461 675 17.5 262.5 485 676 17.5 267.5 547 677 17.5 272.5 457 678 17.5 277.5 449 679 17.5 282.5 509 680 17.5 287.5 510 681 17.5 292.5 490 682 17.5 297.5 489 683 17.5 302.5 493 684 17.5 307.5 465 685 17.5 312.5 529 686 17.5 317.5 484 687 17.5 322.5 428 690 17.5 337.5 588 691 17.5 342.5 568 703 12.5 42.5 766 705 12.5 52.5 805 706 12.5 57.5 540 707 12.5 62.5 510 708 12.5 67.5 589 709 12.5 72.5 468 710 12.5 77.5 482 711 12.5 82.5 738 712 12.5 87.5 633 713 12.5 92.5 588 714 12.5 97.5 520 715 12.5 102.5 526 716 12.5 107.5 610 717 12.5 112.5 463 718 12.5 117.5 486 719 12.5 122.5 542 720 12.5 127.5 398 721 12.5 132.5 398 722 12.5 137.5 445 723 12.5 142.5 404 724 12.5 147.5 391 725 12.5 152.5 463 726 12.5 157.5 525 729 12.5 172.5 496 730 12.5 177.5 493 731 12.5 182.5 567 733 12.5 192.5 469 734 12.5 197.5 396 738 12.5 217.5 376 740 12.5 227.5 456 743 12.5 242.5 456 744 12.5 247.5 389 745 12.5 252.5 424 746 12.5 257.5 459 747 12.5 262.5 453 748 12.5 267.5 465 749 12.5 272.5 456 750 12.5 277.5 433 751 12.5 282.5 465 752 12.5 287.5 487 753 12.5 292.5 500 754 12.5 297.5 482 755 12.5 302.5 461 756 12.5 307.5 470 757 12.5 312.5 437 758 12.5 317.5 489 759 12.5 322.5 526 760 12.5 327.5 462 761 12.5 332.5 482 762 12.5 337.5 572 763 12.5 342.5 483 767 7.5 2.5 444 777 7.5 52.5 530 778 7.5 57.5 502 779 7.5 62.5 520 780 7.5 67.5 518 781 7.5 72.5 489 782 7.5 77.5 481 783 7.5 82.5 519 784 7.5 87.5 457 785 7.5 92.5 446 786 7.5 97.5 517 787 7.5 102.5 552 788 7.5 107.5 475 789 7.5 112.5 478 790 7.5 117.5 486 791 7.5 122.5 475 792 7.5 127.5 380 793 7.5 132.5 447 794 7.5 137.5 432 795 7.5 142.5 418 796 7.5 147.5 381 797 7.5 152.5 399 798 7.5 157.5 438 800 7.5 167.5 518 801 7.5 172.5 369 804 7.5 187.5 516 805 7.5 192.5 396 808 7.5 207.5 410 818 7.5 257.5 383 819 7.5 262.5 411 820 7.5 267.5 426 821 7.5 272.5 427 822 7.5 277.5 412 823 7.5 282.5 471 827 7.5 302.5 523 828 7.5 307.5 448 829 7.5 312.5 444 830 7.5 317.5 469 831 7.5 322.5 516 832 7.5 327.5 503 833 7.5 332.5 448 834 7.5 337.5 547 835 7.5 342.5 463 836 7.5 347.5 471 837 7.5 352.5 525 838 7.5 357.5 508 839 2.5 2.5 490 840 2.5 7.5 501 848 2.5 47.5 499 849 2.5 52.5 448 850 2.5 57.5 494 851 2.5 62.5 539 852 2.5 67.5 468 853 2.5 72.5 466 854 2.5 77.5 464 855 2.5 82.5 498 856 2.5 87.5 445 857 2.5 92.5 450 858 2.5 97.5 496 859 2.5 102.5 587 860 2.5 107.5 489 861 2.5 112.5 590 863 2.5 122.5 456 864 2.5 127.5 409 865 2.5 132.5 493 866 2.5 137.5 461 867 2.5 142.5 405 868 2.5 147.5 430 869 2.5 152.5 403 877 2.5 192.5 450 891 2.5 262.5 408 892 2.5 267.5 448 893 2.5 272.5 393 894 2.5 277.5 461 895 2.5 282.5 450 901 2.5 312.5 499 902 2.5 317.5 476 903 2.5 322.5 482 904 2.5 327.5 480 905 2.5 332.5 488 907 2.5 342.5 500 908 2.5 347.5 476 909 2.5 352.5 511 910 2.5 357.5 501 911 -2.5 2.5 619 912 -2.5 7.5 547 919 -2.5 42.5 472 920 -2.5 47.5 522 921 -2.5 52.5 501 923 -2.5 62.5 541 924 -2.5 67.5 436 925 -2.5 72.5 428 926 -2.5 77.5 439 927 -2.5 82.5 404 928 -2.5 87.5 452 929 -2.5 92.5 478 930 -2.5 97.5 480 932 -2.5 107.5 563 936 -2.5 127.5 463 939 -2.5 142.5 477 940 -2.5 147.5 486 941 -2.5 152.5 422 948 -2.5 187.5 384 964 -2.5 267.5 495 965 -2.5 272.5 501 966 -2.5 277.5 557 974 -2.5 317.5 597 975 -2.5 322.5 477 976 -2.5 327.5 455 977 -2.5 332.5 546 981 -2.5 352.5 514 982 -2.5 357.5 549 991 -7.5 42.5 449 992 -7.5 47.5 444 993 -7.5 52.5 553 996 -7.5 67.5 476 997 -7.5 72.5 411 998 -7.5 77.5 445 1000 -7.5 87.5 407 1001 -7.5 92.5 470 1002 -7.5 97.5 424 1003 -7.5 102.5 493 1004 -7.5 107.5 518 1007 -7.5 122.5 436 1009 -7.5 132.5 440 1012 -7.5 147.5 409 1013 -7.5 152.5 403 1014 -7.5 157.5 417 1020 -7.5 187.5 407 1021 -7.5 192.5 531 1035 -7.5 262.5 425 1036 -7.5 267.5 413 1038 -7.5 277.5 729 1047 -7.5 322.5 545 1048 -7.5 327.5 489 1049 -7.5 332.5 525 1050 -7.5 337.5 510 1052 -7.5 347.5 544 1053 -7.5 352.5 564 1054 -7.5 357.5 504 1055 -12.5 2.5 532 1063 -12.5 42.5 519 1065 -12.5 52.5 496 1068 -12.5 67.5 409 1069 -12.5 72.5 415 1071 -12.5 82.5 435 1072 -12.5 87.5 463 1073 -12.5 92.5 408 1074 -12.5 97.5 443 1076 -12.5 107.5 518 1085 -12.5 152.5 423 1086 -12.5 157.5 483 1091 -12.5 182.5 399 1092 -12.5 187.5 433 1105 -12.5 252.5 448 1119 -12.5 322.5 527 1120 -12.5 327.5 544 1122 -12.5 337.5 494 1123 -12.5 342.5 458 1126 -12.5 357.5 523 1127 -17.5 2.5 515 1128 -17.5 7.5 529 1129 -17.5 12.5 615 1134 -17.5 37.5 451 1135 -17.5 42.5 521 1137 -17.5 52.5 616 1138 -17.5 57.5 478 1139 -17.5 62.5 451 1143 -17.5 82.5 561 1144 -17.5 87.5 504 1145 -17.5 92.5 477 1146 -17.5 97.5 449 1157 -17.5 152.5 487 1162 -17.5 177.5 425 1163 -17.5 182.5 465 1164 -17.5 187.5 405 1166 -17.5 197.5 408 1167 -17.5 202.5 389 1168 -17.5 207.5 448 1169 -17.5 212.5 546 1175 -17.5 242.5 434 1176 -17.5 247.5 453 1191 -17.5 322.5 507 1196 -17.5 347.5 445 1197 -17.5 352.5 458 1198 -17.5 357.5 512 1199 -22.5 2.5 530 1200 -22.5 7.5 518 1206 -22.5 37.5 493 1208 -22.5 47.5 458 1209 -22.5 52.5 491 1210 -22.5 57.5 538 1217 -22.5 92.5 471 1218 -22.5 97.5 472 1219 -22.5 102.5 527 1221 -22.5 112.5 533 1229 -22.5 152.5 463 1232 -22.5 167.5 603 1234 -22.5 177.5 401 1235 -22.5 182.5 462 1242 -22.5 217.5 629 1243 -22.5 222.5 626 1244 -22.5 227.5 624 1245 -22.5 232.5 526 1262 -22.5 317.5 642 1263 -22.5 322.5 582 1270 -22.5 357.5 489 1271 -27.5 2.5 468 1272 -27.5 7.5 471 1273 -27.5 12.5 535 1277 -27.5 32.5 517 1278 -27.5 37.5 504 1279 -27.5 42.5 491 1280 -27.5 47.5 453 1290 -27.5 97.5 432 1292 -27.5 107.5 495 1293 -27.5 112.5 528 1301 -27.5 152.5 505 1302 -27.5 157.5 470 1303 -27.5 162.5 451 1304 -27.5 167.5 453 1305 -27.5 172.5 555 1306 -27.5 177.5 488 1307 -27.5 182.5 468 1308 -27.5 187.5 418 1333 -27.5 312.5 561 1334 -27.5 317.5 563 1343 -32.5 2.5 430 1344 -32.5 7.5 479 1345 -32.5 12.5 473 1346 -32.5 17.5 506 1347 -32.5 22.5 521 1348 -32.5 27.5 519 1349 -32.5 32.5 470 1352 -32.5 47.5 431 1361 -32.5 92.5 434 1362 -32.5 97.5 454 1364 -32.5 107.5 430 1365 -32.5 112.5 479 1366 -32.5 117.5 507 1373 -32.5 152.5 531 1374 -32.5 157.5 465 1375 -32.5 162.5 517 1376 -32.5 167.5 413 1377 -32.5 172.5 484 1378 -32.5 177.5 433 1379 -32.5 182.5 428 1380 -32.5 187.5 448 1381 -32.5 192.5 513 1382 -32.5 197.5 467 1404 -32.5 307.5 548 1405 -32.5 312.5 543 1438 -37.5 117.5 460 1439 -37.5 122.5 491 1440 -37.5 127.5 474 1441 -37.5 132.5 457 1442 -37.5 137.5 492 1443 -37.5 142.5 491 1444 -37.5 147.5 505 1445 -37.5 152.5 434 1446 -37.5 157.5 456 1447 -37.5 162.5 436 1448 -37.5 167.5 492 1449 -37.5 172.5 496 1450 -37.5 177.5 446 1451 -37.5 182.5 513 1452 -37.5 187.5 420 1470 -37.5 277.5 593 1521 -42.5 172.5 543 1661 -52.5 305.0 449 1663 -52.5 325.0 818