Cumulus Frequency of Occurrence (%) November (1954 - 1997) , Ship Observations Only Global Average: 32.9 Zonal Averages 17 zones Lat.N Average 85 2.1 75 5.3 65 11.2 55 16.5 45 19.6 35 31.5 25 44.1 15 49.4 5 44.7 -5 51.4 -15 45.4 -25 40.3 -35 28.1 -45 18.4 -55 12.2 -65 6.3 -75 9.8 Grid Box Averages 385 filled boxes Box # Lat.N Lon.E Average 1 85 60 4.5 2 85 180 0.8 3 85 300 0.7 4 75 20 11.2 5 75 60 7.6 6 75 100 3.1 7 75 140 4.1 8 75 180 0.9 9 75 220 0.2 10 75 260 2.1 11 75 300 13.2 12 75 340 9.3 13 65 10 14.4 14 65 30 7.9 15 65 50 10.2 20 65 150 8.6 21 65 170 9.3 22 65 190 7.4 23 65 210 9.1 27 65 290 10.3 28 65 310 9.3 29 65 330 12.1 30 65 350 13.7 31 55 10 19.2 32 55 30 17.7 37 55 130 25.2 38 55 150 15.8 39 55 170 16.5 40 55 190 15.8 41 55 210 17.7 42 55 230 18.3 45 55 290 13.8 46 55 310 14.0 47 55 330 15.9 48 55 350 18.1 49 45 5 28.4 50 45 15 26.7 51 45 25 18.7 52 45 35 19.9 53 45 45 12.8 54 45 55 14.5 61 45 125 28.5 62 45 135 21.2 63 45 145 23.9 64 45 155 18.2 65 45 165 16.2 66 45 175 17.7 67 45 185 18.6 68 45 195 19.7 69 45 205 17.8 70 45 215 18.3 71 45 225 18.7 72 45 235 17.6 77 45 285 20.8 78 45 295 20.6 79 45 305 17.5 80 45 315 19.0 81 45 325 21.7 82 45 335 21.7 83 45 345 20.7 84 45 355 23.3 85 35 5 32.0 86 35 15 38.2 87 35 25 40.3 88 35 35 41.6 90 35 55 26.9 96 35 115 20.8 97 35 125 29.0 98 35 135 40.1 99 35 145 31.2 100 35 155 28.1 101 35 165 29.4 102 35 175 25.7 103 35 185 24.4 104 35 195 24.2 105 35 205 24.4 106 35 215 27.2 107 35 225 27.9 108 35 235 23.6 109 35 245 20.3 112 35 275 33.9 113 35 285 33.7 114 35 295 37.1 115 35 305 38.8 116 35 315 39.7 117 35 325 36.4 118 35 335 34.0 119 35 345 36.0 120 35 355 27.9 124 25 35 28.5 125 25 45 10.4 126 25 55 18.1 127 25 65 22.0 128 25 75 13.0 129 25 85 23.7 130 25 95 33.6 131 25 105 37.4 132 25 115 27.7 133 25 125 33.9 134 25 135 40.7 135 25 145 48.1 136 25 155 47.6 137 25 165 49.9 138 25 175 45.8 139 25 185 46.4 140 25 195 49.5 141 25 205 51.1 142 25 215 43.9 143 25 225 32.7 144 25 235 31.7 145 25 245 30.6 146 25 255 45.0 147 25 265 39.9 148 25 275 47.9 149 25 285 50.2 150 25 295 54.2 151 25 305 55.2 152 25 315 53.7 153 25 325 53.8 154 25 335 51.5 155 25 345 28.6 160 15 35 41.5 161 15 45 36.0 162 15 55 51.5 163 15 65 49.6 164 15 75 34.0 165 15 85 43.6 166 15 95 49.5 167 15 105 46.4 168 15 115 43.7 169 15 125 40.0 170 15 135 48.3 171 15 145 52.8 172 15 155 56.3 173 15 165 58.2 174 15 175 51.3 175 15 185 52.2 176 15 195 53.6 177 15 205 52.3 178 15 215 45.0 179 15 225 37.8 180 15 235 35.2 181 15 245 50.4 182 15 255 56.2 183 15 265 43.6 184 15 275 45.4 185 15 285 55.6 186 15 295 59.5 187 15 305 58.9 188 15 315 57.4 189 15 325 57.1 190 15 335 46.9 191 15 345 17.1 193 5 5 43.8 197 5 45 62.1 198 5 55 59.9 199 5 65 60.6 200 5 75 45.2 201 5 85 43.5 202 5 95 38.8 203 5 105 39.7 204 5 115 39.2 205 5 125 46.8 206 5 135 48.1 207 5 145 44.5 208 5 155 48.1 209 5 165 48.4 210 5 175 46.4 211 5 185 50.6 212 5 195 51.6 213 5 205 49.8 214 5 215 43.1 215 5 225 40.6 216 5 235 31.9 217 5 245 34.7 218 5 255 31.9 219 5 265 31.0 220 5 275 29.6 221 5 285 30.6 223 5 305 53.9 224 5 315 54.3 225 5 325 53.7 226 5 335 43.9 227 5 345 41.3 228 5 355 46.5 229 -5 5 32.0 230 -5 15 29.5 232 -5 35 63.4 233 -5 45 65.3 234 -5 55 57.8 235 -5 65 53.8 236 -5 75 49.8 237 -5 85 43.0 238 -5 95 41.0 239 -5 105 40.6 240 -5 115 48.1 241 -5 125 54.0 242 -5 135 58.2 243 -5 145 47.6 244 -5 155 45.4 245 -5 165 48.5 246 -5 175 52.3 247 -5 185 57.4 248 -5 195 65.0 249 -5 205 72.1 250 -5 215 72.3 251 -5 225 76.0 252 -5 235 74.6 253 -5 245 57.6 254 -5 255 37.7 255 -5 265 25.2 256 -5 275 18.1 257 -5 285 13.4 260 -5 315 66.5 261 -5 325 70.5 262 -5 335 60.1 263 -5 345 39.0 264 -5 355 29.3 265 -15 5 12.2 266 -15 15 21.8 268 -15 35 51.6 269 -15 45 60.5 270 -15 55 66.1 271 -15 65 57.5 272 -15 75 51.0 273 -15 85 45.9 274 -15 95 47.9 275 -15 105 51.0 276 -15 115 47.1 277 -15 125 50.2 278 -15 135 57.5 279 -15 145 60.4 280 -15 155 59.3 281 -15 165 48.4 282 -15 175 47.9 283 -15 185 47.7 284 -15 195 45.5 285 -15 205 51.6 286 -15 215 53.9 287 -15 225 62.7 288 -15 235 64.3 289 -15 245 55.9 290 -15 255 38.1 291 -15 265 26.1 292 -15 275 12.3 293 -15 285 13.1 297 -15 325 55.0 298 -15 335 48.9 299 -15 345 25.4 300 -15 355 12.1 301 -25 5 22.4 302 -25 15 23.4 304 -25 35 42.4 305 -25 45 47.9 306 -25 55 56.0 307 -25 65 50.8 308 -25 75 44.0 309 -25 85 42.8 310 -25 95 40.3 311 -25 105 37.8 312 -25 115 37.5 315 -25 145 63.2 316 -25 155 51.9 317 -25 165 48.3 318 -25 175 46.1 319 -25 185 46.0 320 -25 195 40.8 321 -25 205 40.5 322 -25 215 35.8 323 -25 225 42.0 324 -25 235 55.4 325 -25 245 55.4 326 -25 255 46.1 327 -25 265 38.1 328 -25 275 21.8 329 -25 285 20.6 332 -25 315 32.2 333 -25 325 37.9 334 -25 335 37.9 335 -25 345 31.1 336 -25 355 25.8 337 -35 5 25.4 338 -35 15 29.7 339 -35 25 29.5 340 -35 35 31.1 341 -35 45 32.3 342 -35 55 32.4 343 -35 65 27.4 344 -35 75 24.6 345 -35 85 24.6 346 -35 95 23.8 347 -35 105 25.9 348 -35 115 31.8 349 -35 125 25.2 350 -35 135 24.2 351 -35 145 26.9 352 -35 155 32.9 353 -35 165 30.2 354 -35 175 33.7 355 -35 185 34.5 356 -35 195 30.7 357 -35 205 30.3 358 -35 215 27.4 359 -35 225 32.8 360 -35 235 27.6 361 -35 245 24.4 362 -35 255 24.9 363 -35 265 23.1 364 -35 275 25.1 365 -35 285 24.1 366 -35 295 37.9 367 -35 305 25.0 368 -35 315 32.6 369 -35 325 32.5 370 -35 335 26.9 371 -35 345 24.1 372 -35 355 24.3 373 -45 5 14.2 374 -45 15 16.6 375 -45 25 16.5 376 -45 35 17.0 377 -45 45 18.2 378 -45 55 15.4 379 -45 65 15.9 380 -45 75 15.6 381 -45 85 17.3 382 -45 95 20.4 383 -45 105 19.8 384 -45 115 19.1 385 -45 125 22.6 386 -45 135 19.6 387 -45 145 24.7 388 -45 155 20.5 389 -45 165 19.3 390 -45 175 24.7 391 -45 185 20.6 392 -45 195 20.1 393 -45 205 18.1 394 -45 215 19.2 395 -45 225 26.8 396 -45 235 21.5 397 -45 245 19.5 398 -45 255 6.6 400 -45 275 23.2 401 -45 285 23.7 402 -45 295 17.6 403 -45 305 14.1 404 -45 315 19.7 405 -45 325 17.4 406 -45 335 14.4 407 -45 345 12.9 408 -45 355 14.2 409 -55 10 9.3 410 -55 30 8.7 411 -55 50 10.5 412 -55 70 14.9 413 -55 90 11.8 414 -55 110 15.9 415 -55 130 13.3 416 -55 150 10.2 417 -55 170 12.7 418 -55 190 22.8 419 -55 210 13.4 420 -55 230 5.7 421 -55 250 9.9 422 -55 270 17.4 423 -55 290 14.7 424 -55 310 11.5 425 -55 330 11.8 426 -55 350 6.3 427 -65 10 1.0 429 -65 50 6.0 430 -65 70 6.3 431 -65 90 6.1 432 -65 110 10.8 433 -65 130 8.9 434 -65 150 10.5 435 -65 170 6.1 436 -65 190 8.6 441 -65 290 4.0 442 -65 310 7.8 443 -65 330 3.9 444 -65 350 4.9 449 -75 180 11.5 453 -75 340 7.1