Cumulus Frequency of Occurrence (%) November (1954 - 1997) Day, Ship Observations Only Global Average: 34.9 Zonal Averages 17 zones Lat.N Average 85 2.9 75 4.7 65 11.1 55 15.8 45 19.7 35 32.3 25 45.8 15 51.0 5 47.0 -5 53.9 -15 48.1 -25 44.0 -35 31.1 -45 20.8 -55 13.4 -65 8.7 -75 11.8 Grid Box Averages 379 filled boxes Box # Lat.N Lon.E Average 1 85 60 5.4 2 85 180 0.5 4 75 20 10.0 5 75 60 8.0 6 75 100 3.7 7 75 140 2.8 8 75 180 0.9 9 75 220 0.5 10 75 260 2.4 11 75 300 7.9 12 75 340 8.3 13 65 10 12.9 14 65 30 9.0 15 65 50 10.7 20 65 150 10.0 21 65 170 9.5 22 65 190 7.0 23 65 210 10.7 27 65 290 10.3 28 65 310 9.4 29 65 330 12.4 30 65 350 13.7 31 55 10 18.5 32 55 30 16.3 37 55 130 26.0 38 55 150 16.1 39 55 170 16.1 40 55 190 14.7 41 55 210 16.6 42 55 230 17.3 45 55 290 14.3 46 55 310 13.5 47 55 330 14.9 48 55 350 17.2 49 45 5 30.8 50 45 15 28.8 51 45 25 20.3 52 45 35 21.7 53 45 45 14.7 54 45 55 14.6 61 45 125 27.7 62 45 135 22.5 63 45 145 25.0 64 45 155 18.4 65 45 165 16.0 66 45 175 17.7 67 45 185 19.4 68 45 195 18.2 69 45 205 17.1 70 45 215 17.3 71 45 225 18.8 72 45 235 18.6 77 45 285 22.6 78 45 295 22.4 79 45 305 18.5 80 45 315 18.5 81 45 325 21.3 82 45 335 20.9 83 45 345 20.0 84 45 355 23.5 85 35 5 34.8 86 35 15 40.8 87 35 25 43.5 88 35 35 44.8 90 35 55 27.4 96 35 115 21.2 97 35 125 29.6 98 35 135 40.8 99 35 145 32.2 100 35 155 28.9 101 35 165 29.5 102 35 175 26.8 103 35 185 25.9 104 35 195 24.4 105 35 205 24.6 106 35 215 27.0 107 35 225 27.7 108 35 235 25.3 109 35 245 22.0 112 35 275 36.9 113 35 285 35.3 114 35 295 37.4 115 35 305 39.7 116 35 315 40.3 117 35 325 37.0 118 35 335 33.9 119 35 345 36.6 120 35 355 30.0 124 25 35 36.4 125 25 45 12.8 126 25 55 23.7 127 25 65 26.5 128 25 75 14.0 129 25 85 27.3 131 25 105 39.5 132 25 115 28.8 133 25 125 36.4 134 25 135 43.3 135 25 145 49.9 136 25 155 49.8 137 25 165 50.0 138 25 175 47.3 139 25 185 50.0 140 25 195 49.9 141 25 205 50.4 142 25 215 43.8 143 25 225 34.1 144 25 235 32.2 145 25 245 33.0 146 25 255 50.8 147 25 265 40.8 148 25 275 49.9 149 25 285 52.0 150 25 295 55.6 151 25 305 56.6 152 25 315 55.6 153 25 325 55.0 154 25 335 53.0 155 25 345 29.6 160 15 35 52.5 161 15 45 40.8 162 15 55 55.0 163 15 65 49.8 164 15 75 38.1 165 15 85 46.2 166 15 95 52.0 167 15 105 47.4 168 15 115 45.1 169 15 125 41.8 170 15 135 48.9 171 15 145 53.9 172 15 155 58.1 173 15 165 60.0 174 15 175 53.4 175 15 185 53.8 176 15 195 55.0 177 15 205 52.3 178 15 215 47.7 179 15 225 38.6 180 15 235 38.2 181 15 245 50.3 182 15 255 57.7 183 15 265 46.8 184 15 275 46.4 185 15 285 57.0 186 15 295 60.4 187 15 305 59.2 188 15 315 60.1 189 15 325 59.0 190 15 335 47.9 191 15 345 18.6 193 5 5 44.9 197 5 45 65.5 198 5 55 63.2 199 5 65 62.1 200 5 75 48.6 201 5 85 46.3 202 5 95 41.7 203 5 105 41.0 204 5 115 40.6 205 5 125 49.6 206 5 135 50.0 207 5 145 46.1 208 5 155 48.5 209 5 165 51.2 210 5 175 48.1 211 5 185 51.2 212 5 195 52.9 213 5 205 50.5 214 5 215 44.7 215 5 225 44.8 216 5 235 34.0 217 5 245 36.3 218 5 255 35.7 219 5 265 35.5 220 5 275 33.1 221 5 285 33.6 223 5 305 53.1 224 5 315 54.6 225 5 325 56.1 226 5 335 46.7 227 5 345 45.0 228 5 355 49.9 229 -5 5 37.2 230 -5 15 26.0 232 -5 35 50.3 233 -5 45 68.3 234 -5 55 59.9 235 -5 65 53.5 236 -5 75 51.8 237 -5 85 46.2 238 -5 95 42.2 239 -5 105 39.8 240 -5 115 50.2 241 -5 125 56.9 242 -5 135 60.7 243 -5 145 47.6 244 -5 155 48.5 245 -5 165 49.0 246 -5 175 52.4 247 -5 185 58.4 248 -5 195 65.3 249 -5 205 71.2 250 -5 215 73.1 251 -5 225 76.6 252 -5 235 75.2 253 -5 245 60.7 254 -5 255 45.9 255 -5 265 31.5 256 -5 275 21.9 257 -5 285 12.9 260 -5 315 67.9 261 -5 325 72.5 262 -5 335 63.0 263 -5 345 47.6 264 -5 355 37.6 265 -15 5 16.7 266 -15 15 21.8 268 -15 35 57.9 269 -15 45 64.4 270 -15 55 65.3 271 -15 65 57.9 272 -15 75 53.2 273 -15 85 48.7 274 -15 95 52.3 275 -15 105 53.5 276 -15 115 49.1 277 -15 125 58.3 278 -15 135 65.2 279 -15 145 65.1 280 -15 155 61.4 281 -15 165 51.5 282 -15 175 49.2 283 -15 185 48.5 284 -15 195 48.9 285 -15 205 50.2 286 -15 215 55.9 287 -15 225 61.0 288 -15 235 65.3 289 -15 245 58.1 290 -15 255 45.5 291 -15 265 33.1 292 -15 275 15.3 293 -15 285 11.5 297 -15 325 55.5 298 -15 335 53.7 299 -15 345 31.3 300 -15 355 16.3 301 -25 5 28.6 302 -25 15 23.5 304 -25 35 45.2 305 -25 45 49.8 306 -25 55 58.5 307 -25 65 54.5 308 -25 75 49.8 309 -25 85 50.7 310 -25 95 45.9 311 -25 105 38.4 312 -25 115 38.5 315 -25 145 62.9 316 -25 155 55.8 317 -25 165 52.7 318 -25 175 51.3 319 -25 185 47.6 320 -25 195 44.2 321 -25 205 45.1 322 -25 215 38.7 323 -25 225 44.4 324 -25 235 57.5 325 -25 245 57.5 326 -25 255 53.5 327 -25 265 43.3 328 -25 275 26.0 329 -25 285 20.9 332 -25 315 34.8 333 -25 325 39.2 334 -25 335 42.2 335 -25 345 36.5 336 -25 355 30.5 337 -35 5 29.7 338 -35 15 30.7 339 -35 25 31.8 340 -35 35 34.6 341 -35 45 37.4 342 -35 55 34.9 343 -35 65 30.6 344 -35 75 29.2 345 -35 85 29.6 346 -35 95 26.2 347 -35 105 26.9 348 -35 115 33.3 349 -35 125 27.7 350 -35 135 26.3 351 -35 145 29.4 352 -35 155 36.3 353 -35 165 34.7 354 -35 175 37.6 355 -35 185 38.6 356 -35 195 32.1 357 -35 205 32.5 358 -35 215 29.5 359 -35 225 31.3 360 -35 235 29.6 361 -35 245 22.6 362 -35 255 29.3 363 -35 265 30.4 364 -35 275 27.3 365 -35 285 24.5 366 -35 295 37.3 367 -35 305 27.8 368 -35 315 33.9 369 -35 325 35.8 370 -35 335 32.7 371 -35 345 28.2 372 -35 355 29.2 373 -45 5 17.4 374 -45 15 20.2 375 -45 25 17.7 376 -45 35 19.5 377 -45 45 18.3 378 -45 55 16.9 379 -45 65 18.2 380 -45 75 18.2 381 -45 85 19.8 382 -45 95 27.2 383 -45 105 20.2 384 -45 115 19.8 385 -45 125 24.3 386 -45 135 20.0 387 -45 145 26.9 388 -45 155 24.1 389 -45 165 21.7 390 -45 175 29.4 391 -45 185 21.3 392 -45 195 22.1 393 -45 205 22.2 394 -45 215 19.8 395 -45 225 28.0 396 -45 235 20.9 397 -45 245 24.4 400 -45 275 24.3 401 -45 285 23.8 402 -45 295 17.3 403 -45 305 14.3 404 -45 315 23.2 405 -45 325 15.3 406 -45 335 17.5 407 -45 345 18.4 408 -45 355 17.2 409 -55 10 11.2 410 -55 30 10.1 411 -55 50 11.3 412 -55 70 16.8 413 -55 90 13.5 414 -55 110 17.8 415 -55 130 12.4 416 -55 150 12.1 417 -55 170 15.3 418 -55 190 24.7 419 -55 210 10.6 420 -55 230 7.2 421 -55 250 12.3 422 -55 270 18.7 423 -55 290 16.1 424 -55 310 13.4 425 -55 330 14.3 426 -55 350 4.8 429 -65 50 5.5 430 -65 70 8.2 431 -65 90 10.4 432 -65 110 10.2 433 -65 130 10.9 434 -65 150 11.7 435 -65 170 6.8 436 -65 190 11.6 441 -65 290 4.3 442 -65 310 8.3 449 -75 180 14.0 453 -75 340 8.4