Stratus Average Base Height (meters) March, April, May (1954 - 1997) Night, Ship Observations Only Global Average: 407 Zonal Averages 32 zones Lat.N Average 87.5 385 82.5 296 77.5 390 72.5 403 67.5 442 62.5 427 57.5 411 52.5 403 47.5 388 42.5 400 37.5 411 32.5 426 27.5 422 22.5 441 17.5 464 12.5 489 7.5 420 2.5 399 -2.5 426 -7.5 424 -12.5 406 -17.5 426 -22.5 412 -27.5 402 -32.5 406 -37.5 399 -42.5 413 -47.5 448 -52.5 357 -57.5 392 -62.5 358 -67.5 413 Grid Box Averages 670 filled boxes Box # Lat.N Lon.E Average 1 87.5 0.0 385 5 82.5 140.0 254 6 82.5 180.0 327 7 82.5 220.0 347 11 77.5 10.0 486 12 77.5 30.0 452 18 77.5 150.0 261 19 77.5 170.0 299 20 77.5 190.0 332 22 77.5 230.0 355 28 77.5 350.0 438 29 72.5 10.0 479 30 72.5 30.0 505 31 72.5 50.0 486 32 72.5 70.0 423 39 72.5 210.0 302 46 72.5 350.0 336 47 67.5 5.0 380 48 67.5 15.0 467 50 67.5 35.0 510 51 67.5 45.0 510 77 67.5 305.0 463 79 67.5 325.0 503 80 67.5 335.0 407 81 67.5 345.0 380 82 67.5 355.0 505 83 62.5 5.0 421 98 62.5 155.0 571 99 62.5 165.0 461 100 62.5 175.0 413 101 62.5 185.0 348 102 62.5 195.0 421 104 62.5 215.0 467 115 62.5 325.0 348 116 62.5 335.0 467 117 62.5 345.0 471 118 62.5 355.0 492 119 57.5 5.0 415 120 57.5 15.0 444 121 57.5 25.0 438 133 57.5 145.0 490 134 57.5 155.0 449 135 57.5 165.0 412 136 57.5 175.0 402 137 57.5 185.0 433 138 57.5 195.0 421 139 57.5 205.0 387 140 57.5 215.0 380 141 57.5 225.0 436 149 57.5 305.0 360 150 57.5 315.0 424 151 57.5 325.0 437 152 57.5 335.0 379 153 57.5 345.0 356 154 57.5 355.0 421 155 52.5 5.0 456 156 52.5 15.0 477 169 52.5 145.0 430 170 52.5 155.0 455 171 52.5 165.0 425 172 52.5 175.0 426 173 52.5 185.0 411 174 52.5 195.0 403 175 52.5 205.0 386 176 52.5 215.0 354 177 52.5 225.0 386 178 52.5 235.0 436 185 52.5 305.0 494 186 52.5 315.0 411 187 52.5 325.0 369 188 52.5 335.0 376 189 52.5 345.0 374 190 52.5 355.0 437 218 47.5 137.5 480 219 47.5 142.5 515 220 47.5 147.5 458 221 47.5 152.5 417 222 47.5 157.5 388 223 47.5 162.5 386 224 47.5 167.5 399 225 47.5 172.5 392 226 47.5 177.5 380 227 47.5 182.5 396 228 47.5 187.5 386 229 47.5 192.5 369 230 47.5 197.5 380 231 47.5 202.5 374 232 47.5 207.5 377 233 47.5 212.5 387 234 47.5 217.5 374 235 47.5 222.5 395 236 47.5 227.5 402 237 47.5 232.5 424 238 47.5 237.5 425 251 47.5 302.5 404 252 47.5 307.5 369 253 47.5 312.5 363 254 47.5 317.5 385 255 47.5 322.5 370 256 47.5 327.5 380 257 47.5 332.5 370 258 47.5 337.5 369 259 47.5 342.5 368 260 47.5 347.5 383 261 47.5 352.5 412 262 47.5 357.5 423 263 42.5 2.5 582 264 42.5 7.5 591 265 42.5 12.5 620 266 42.5 17.5 653 268 42.5 27.5 574 269 42.5 32.5 604 289 42.5 132.5 543 290 42.5 137.5 543 291 42.5 142.5 487 292 42.5 147.5 416 293 42.5 152.5 395 294 42.5 157.5 376 295 42.5 162.5 371 296 42.5 167.5 382 297 42.5 172.5 374 298 42.5 177.5 387 299 42.5 182.5 377 300 42.5 187.5 380 301 42.5 192.5 384 302 42.5 197.5 355 303 42.5 202.5 367 304 42.5 207.5 366 305 42.5 212.5 386 306 42.5 217.5 423 307 42.5 222.5 373 308 42.5 227.5 428 309 42.5 232.5 401 310 42.5 237.5 446 320 42.5 287.5 595 321 42.5 292.5 526 322 42.5 297.5 409 323 42.5 302.5 371 324 42.5 307.5 367 325 42.5 312.5 397 326 42.5 317.5 409 327 42.5 322.5 393 328 42.5 327.5 389 329 42.5 332.5 382 330 42.5 337.5 385 331 42.5 342.5 373 332 42.5 347.5 417 333 42.5 352.5 436 334 42.5 357.5 484 335 37.5 2.5 501 336 37.5 7.5 530 337 37.5 12.5 572 338 37.5 17.5 574 339 37.5 22.5 606 340 37.5 27.5 628 359 37.5 122.5 673 360 37.5 127.5 478 361 37.5 132.5 510 362 37.5 137.5 473 363 37.5 142.5 443 364 37.5 147.5 383 365 37.5 152.5 354 366 37.5 157.5 359 367 37.5 162.5 370 368 37.5 167.5 378 369 37.5 172.5 377 370 37.5 177.5 361 371 37.5 182.5 379 372 37.5 187.5 384 373 37.5 192.5 359 374 37.5 197.5 358 375 37.5 202.5 358 376 37.5 207.5 374 377 37.5 212.5 380 378 37.5 217.5 416 379 37.5 222.5 400 380 37.5 227.5 391 381 37.5 232.5 425 382 37.5 237.5 449 391 37.5 282.5 538 392 37.5 287.5 473 393 37.5 292.5 440 394 37.5 297.5 411 395 37.5 302.5 424 396 37.5 307.5 419 397 37.5 312.5 422 398 37.5 317.5 428 399 37.5 322.5 426 400 37.5 327.5 442 401 37.5 332.5 441 402 37.5 337.5 445 403 37.5 342.5 456 404 37.5 347.5 457 405 37.5 352.5 494 406 37.5 357.5 525 409 32.5 12.5 739 410 32.5 17.5 604 411 32.5 22.5 555 412 32.5 27.5 589 413 32.5 32.5 537 431 32.5 122.5 671 432 32.5 127.5 434 433 32.5 132.5 415 434 32.5 137.5 415 435 32.5 142.5 372 436 32.5 147.5 349 437 32.5 152.5 346 438 32.5 157.5 361 439 32.5 162.5 374 440 32.5 167.5 379 441 32.5 172.5 387 442 32.5 177.5 384 443 32.5 182.5 382 444 32.5 187.5 412 445 32.5 192.5 400 446 32.5 197.5 385 447 32.5 202.5 406 448 32.5 207.5 423 449 32.5 212.5 433 450 32.5 217.5 433 451 32.5 222.5 453 452 32.5 227.5 444 453 32.5 232.5 439 454 32.5 237.5 460 455 32.5 242.5 476 461 32.5 272.5 468 462 32.5 277.5 595 463 32.5 282.5 495 464 32.5 287.5 450 465 32.5 292.5 459 466 32.5 297.5 440 467 32.5 302.5 409 468 32.5 307.5 425 469 32.5 312.5 413 470 32.5 317.5 422 471 32.5 322.5 462 472 32.5 327.5 478 473 32.5 332.5 497 474 32.5 337.5 505 475 32.5 342.5 524 476 32.5 347.5 500 477 32.5 352.5 553 489 27.5 52.5 650 490 27.5 57.5 531 503 27.5 122.5 406 504 27.5 127.5 407 505 27.5 132.5 371 506 27.5 137.5 345 507 27.5 142.5 344 508 27.5 147.5 389 509 27.5 152.5 401 510 27.5 157.5 387 511 27.5 162.5 372 512 27.5 167.5 360 513 27.5 172.5 392 514 27.5 177.5 411 515 27.5 182.5 392 516 27.5 187.5 430 517 27.5 192.5 385 518 27.5 197.5 452 519 27.5 202.5 425 520 27.5 207.5 433 521 27.5 212.5 428 522 27.5 217.5 435 523 27.5 222.5 464 524 27.5 227.5 449 525 27.5 232.5 431 526 27.5 237.5 443 527 27.5 242.5 490 528 27.5 247.5 477 531 27.5 262.5 436 532 27.5 267.5 432 533 27.5 272.5 446 534 27.5 277.5 460 535 27.5 282.5 501 536 27.5 287.5 461 537 27.5 292.5 444 538 27.5 297.5 474 539 27.5 302.5 439 540 27.5 307.5 449 541 27.5 312.5 423 542 27.5 317.5 442 543 27.5 322.5 497 544 27.5 327.5 449 545 27.5 332.5 556 546 27.5 337.5 534 547 27.5 342.5 542 548 27.5 347.5 531 558 22.5 37.5 681 562 22.5 57.5 618 573 22.5 112.5 474 574 22.5 117.5 420 575 22.5 122.5 392 576 22.5 127.5 413 577 22.5 132.5 391 578 22.5 137.5 334 579 22.5 142.5 397 580 22.5 147.5 433 581 22.5 152.5 395 582 22.5 157.5 439 583 22.5 162.5 464 584 22.5 167.5 383 585 22.5 172.5 431 586 22.5 177.5 418 587 22.5 182.5 413 588 22.5 187.5 388 589 22.5 192.5 423 590 22.5 197.5 431 591 22.5 202.5 492 592 22.5 207.5 447 593 22.5 212.5 412 594 22.5 217.5 455 595 22.5 222.5 444 596 22.5 227.5 408 597 22.5 232.5 454 599 22.5 242.5 528 600 22.5 247.5 565 601 22.5 252.5 603 603 22.5 262.5 423 604 22.5 267.5 515 605 22.5 272.5 483 606 22.5 277.5 490 607 22.5 282.5 513 608 22.5 287.5 546 609 22.5 292.5 508 610 22.5 297.5 453 611 22.5 302.5 455 612 22.5 307.5 382 613 22.5 312.5 454 614 22.5 317.5 506 618 22.5 337.5 477 619 22.5 342.5 534 631 17.5 42.5 714 634 17.5 57.5 434 640 17.5 87.5 662 644 17.5 107.5 477 645 17.5 112.5 462 646 17.5 117.5 442 647 17.5 122.5 394 648 17.5 127.5 432 649 17.5 132.5 370 650 17.5 137.5 401 651 17.5 142.5 396 652 17.5 147.5 373 653 17.5 152.5 458 660 17.5 187.5 553 661 17.5 192.5 473 663 17.5 202.5 497 666 17.5 217.5 431 667 17.5 222.5 454 668 17.5 227.5 430 669 17.5 232.5 456 670 17.5 237.5 450 671 17.5 242.5 489 673 17.5 252.5 510 674 17.5 257.5 527 675 17.5 262.5 519 676 17.5 267.5 391 677 17.5 272.5 457 678 17.5 277.5 435 679 17.5 282.5 538 680 17.5 287.5 490 681 17.5 292.5 482 682 17.5 297.5 533 683 17.5 302.5 453 684 17.5 307.5 452 685 17.5 312.5 387 690 17.5 337.5 563 691 17.5 342.5 549 703 12.5 42.5 611 704 12.5 47.5 587 705 12.5 52.5 529 706 12.5 57.5 548 709 12.5 72.5 527 711 12.5 82.5 681 712 12.5 87.5 719 713 12.5 92.5 619 716 12.5 107.5 533 717 12.5 112.5 456 718 12.5 117.5 480 720 12.5 127.5 386 721 12.5 132.5 381 722 12.5 137.5 381 723 12.5 142.5 376 724 12.5 147.5 381 738 12.5 217.5 386 746 12.5 257.5 428 747 12.5 262.5 527 748 12.5 267.5 517 749 12.5 272.5 525 750 12.5 277.5 433 751 12.5 282.5 470 752 12.5 287.5 564 753 12.5 292.5 485 754 12.5 297.5 536 755 12.5 302.5 425 756 12.5 307.5 438 761 12.5 332.5 535 762 12.5 337.5 648 763 12.5 342.5 533 767 7.5 2.5 432 780 7.5 67.5 504 781 7.5 72.5 515 782 7.5 77.5 496 783 7.5 82.5 457 784 7.5 87.5 434 785 7.5 92.5 420 786 7.5 97.5 503 787 7.5 102.5 558 788 7.5 107.5 496 789 7.5 112.5 442 792 7.5 127.5 371 793 7.5 132.5 345 795 7.5 142.5 376 796 7.5 147.5 377 797 7.5 152.5 424 808 7.5 207.5 362 811 7.5 222.5 306 820 7.5 267.5 451 821 7.5 272.5 451 822 7.5 277.5 427 823 7.5 282.5 482 828 7.5 307.5 390 829 7.5 312.5 412 830 7.5 317.5 440 833 7.5 332.5 467 834 7.5 337.5 574 835 7.5 342.5 504 836 7.5 347.5 502 838 7.5 357.5 431 839 2.5 2.5 418 840 2.5 7.5 463 855 2.5 82.5 355 856 2.5 87.5 382 857 2.5 92.5 380 858 2.5 97.5 467 859 2.5 102.5 549 860 2.5 107.5 500 867 2.5 142.5 337 868 2.5 147.5 346 869 2.5 152.5 368 891 2.5 262.5 357 892 2.5 267.5 398 893 2.5 272.5 373 894 2.5 277.5 449 901 2.5 312.5 349 902 2.5 317.5 397 903 2.5 322.5 371 904 2.5 327.5 361 905 2.5 332.5 466 908 2.5 347.5 446 909 2.5 352.5 446 910 2.5 357.5 445 911 -2.5 2.5 503 912 -2.5 7.5 447 925 -2.5 72.5 452 927 -2.5 82.5 375 928 -2.5 87.5 445 936 -2.5 127.5 438 939 -2.5 142.5 413 941 -2.5 152.5 377 963 -2.5 262.5 355 964 -2.5 267.5 370 965 -2.5 272.5 429 966 -2.5 277.5 527 974 -2.5 317.5 421 975 -2.5 322.5 411 976 -2.5 327.5 413 977 -2.5 332.5 398 981 -2.5 352.5 476 982 -2.5 357.5 505 983 -7.5 2.5 616 984 -7.5 7.5 475 991 -7.5 42.5 412 992 -7.5 47.5 417 997 -7.5 72.5 347 998 -7.5 77.5 400 1000 -7.5 87.5 423 1001 -7.5 92.5 457 1008 -7.5 127.5 464 1009 -7.5 132.5 354 1010 -7.5 137.5 418 1012 -7.5 147.5 419 1013 -7.5 152.5 383 1035 -7.5 262.5 385 1036 -7.5 267.5 435 1038 -7.5 277.5 434 1047 -7.5 322.5 403 1048 -7.5 327.5 446 1054 -7.5 357.5 499 1055 -12.5 2.5 500 1056 -12.5 7.5 560 1063 -12.5 42.5 422 1068 -12.5 67.5 402 1071 -12.5 82.5 360 1072 -12.5 87.5 404 1073 -12.5 92.5 373 1074 -12.5 97.5 376 1082 -12.5 137.5 338 1083 -12.5 142.5 353 1084 -12.5 147.5 392 1085 -12.5 152.5 401 1086 -12.5 157.5 339 1092 -12.5 187.5 436 1111 -12.5 282.5 464 1119 -12.5 322.5 450 1126 -12.5 357.5 494 1127 -17.5 2.5 496 1128 -17.5 7.5 482 1129 -17.5 12.5 527 1135 -17.5 42.5 517 1139 -17.5 62.5 474 1143 -17.5 82.5 356 1144 -17.5 87.5 365 1145 -17.5 92.5 425 1146 -17.5 97.5 419 1156 -17.5 147.5 364 1157 -17.5 152.5 393 1162 -17.5 177.5 365 1163 -17.5 182.5 364 1164 -17.5 187.5 372 1183 -17.5 282.5 519 1191 -17.5 322.5 473 1197 -17.5 352.5 473 1198 -17.5 357.5 455 1199 -22.5 2.5 470 1200 -22.5 7.5 485 1201 -22.5 12.5 502 1206 -22.5 37.5 470 1209 -22.5 52.5 344 1217 -22.5 92.5 428 1218 -22.5 97.5 430 1219 -22.5 102.5 392 1221 -22.5 112.5 574 1229 -22.5 152.5 329 1232 -22.5 167.5 388 1233 -22.5 172.5 387 1234 -22.5 177.5 364 1235 -22.5 182.5 332 1236 -22.5 187.5 368 1261 -22.5 312.5 506 1262 -22.5 317.5 456 1263 -22.5 322.5 469 1270 -22.5 357.5 423 1271 -27.5 2.5 419 1272 -27.5 7.5 407 1273 -27.5 12.5 444 1274 -27.5 17.5 461 1277 -27.5 32.5 443 1278 -27.5 37.5 451 1279 -27.5 42.5 435 1280 -27.5 47.5 378 1289 -27.5 92.5 416 1290 -27.5 97.5 460 1291 -27.5 102.5 540 1292 -27.5 107.5 414 1293 -27.5 112.5 522 1301 -27.5 152.5 331 1303 -27.5 162.5 352 1304 -27.5 167.5 378 1305 -27.5 172.5 358 1306 -27.5 177.5 369 1307 -27.5 182.5 373 1308 -27.5 187.5 368 1313 -27.5 212.5 394 1314 -27.5 217.5 369 1315 -27.5 222.5 345 1316 -27.5 227.5 357 1328 -27.5 287.5 428 1333 -27.5 312.5 463 1334 -27.5 317.5 414 1342 -27.5 357.5 439 1343 -32.5 2.5 434 1344 -32.5 7.5 433 1345 -32.5 12.5 435 1346 -32.5 17.5 439 1347 -32.5 22.5 418 1348 -32.5 27.5 436 1349 -32.5 32.5 435 1358 -32.5 77.5 337 1359 -32.5 82.5 371 1360 -32.5 87.5 460 1361 -32.5 92.5 400 1362 -32.5 97.5 429 1363 -32.5 102.5 406 1364 -32.5 107.5 474 1365 -32.5 112.5 466 1366 -32.5 117.5 502 1373 -32.5 152.5 427 1374 -32.5 157.5 442 1375 -32.5 162.5 420 1376 -32.5 167.5 404 1377 -32.5 172.5 367 1378 -32.5 177.5 351 1379 -32.5 182.5 377 1380 -32.5 187.5 378 1381 -32.5 192.5 351 1382 -32.5 197.5 404 1383 -32.5 202.5 335 1384 -32.5 207.5 368 1385 -32.5 212.5 400 1400 -32.5 287.5 443 1404 -32.5 307.5 488 1405 -32.5 312.5 500 1413 -32.5 352.5 420 1414 -32.5 357.5 415 1415 -37.5 2.5 435 1416 -37.5 7.5 438 1417 -37.5 12.5 365 1419 -37.5 22.5 450 1432 -37.5 87.5 371 1433 -37.5 92.5 390 1434 -37.5 97.5 363 1438 -37.5 117.5 448 1439 -37.5 122.5 418 1440 -37.5 127.5 464 1441 -37.5 132.5 460 1442 -37.5 137.5 472 1443 -37.5 142.5 432 1444 -37.5 147.5 448 1445 -37.5 152.5 436 1446 -37.5 157.5 367 1447 -37.5 162.5 409 1448 -37.5 167.5 353 1449 -37.5 172.5 411 1450 -37.5 177.5 396 1451 -37.5 182.5 363 1452 -37.5 187.5 392 1453 -37.5 192.5 363 1454 -37.5 197.5 365 1470 -37.5 277.5 488 1486 -37.5 357.5 319 1516 -42.5 147.5 486 1517 -42.5 152.5 378 1518 -42.5 157.5 333 1519 -42.5 162.5 431 1520 -42.5 167.5 395 1521 -42.5 172.5 451 1522 -42.5 177.5 419 1523 -42.5 182.5 430 1524 -42.5 187.5 397 1525 -42.5 192.5 368 1541 -42.5 272.5 468 1542 -42.5 277.5 458 1543 -42.5 282.5 491 1592 -47.5 167.5 414 1593 -47.5 172.5 443 1614 -47.5 277.5 487 1618 -47.5 297.5 436 1619 -47.5 302.5 432 1631 -52.5 5.0 262 1647 -52.5 165.0 402 1658 -52.5 275.0 368 1659 -52.5 285.0 344 1660 -52.5 295.0 437 1661 -52.5 305.0 270 1662 -52.5 315.0 479 1663 -52.5 325.0 348 1675 -57.5 85.0 345 1695 -57.5 285.0 389 1696 -57.5 295.0 414 1698 -57.5 315.0 417 1711 -62.5 85.0 402 1732 -62.5 295.0 335 1733 -62.5 305.0 371 1734 -62.5 315.0 319 1743 -67.5 45.0 405 1745 -67.5 65.0 437 1746 -67.5 75.0 482 1768 -67.5 295.0 335