Cumulus Frequency of Occurrence (%) November (1954 - 1997) Night, Ship Observations Only Global Average: 31.1 Zonal Averages 17 zones Lat.N Average 85 2.3 75 6.5 65 11.4 55 17.2 45 19.5 35 30.7 25 42.6 15 47.7 5 42.5 -5 48.9 -15 42.7 -25 36.6 -35 25.4 -45 17.0 -55 10.6 -65 6.2 -75 9.0 Grid Box Averages 348 filled boxes Box # Lat.N Lon.E Average 1 85 60 3.6 2 85 180 1.1 4 75 20 12.4 5 75 60 7.1 8 75 180 0.8 9 75 220 0.0 11 75 300 18.6 12 75 340 10.2 13 65 10 15.8 14 65 30 6.8 15 65 50 9.7 21 65 170 9.2 22 65 190 7.8 27 65 290 10.2 28 65 310 9.3 29 65 330 11.9 30 65 350 13.7 31 55 10 19.9 32 55 30 19.0 38 55 150 15.5 39 55 170 16.8 40 55 190 16.9 41 55 210 18.7 42 55 230 19.4 46 55 310 14.5 47 55 330 16.9 48 55 350 18.9 49 45 5 26.1 50 45 15 24.6 51 45 25 17.2 52 45 35 18.2 53 45 45 10.9 54 45 55 14.5 62 45 135 19.9 63 45 145 22.8 64 45 155 17.9 65 45 165 16.4 66 45 175 17.7 67 45 185 17.8 68 45 195 21.1 69 45 205 18.5 70 45 215 19.3 71 45 225 18.6 72 45 235 16.6 77 45 285 18.9 78 45 295 18.8 79 45 305 16.5 80 45 315 19.4 81 45 325 22.1 82 45 335 22.5 83 45 345 21.3 84 45 355 23.2 85 35 5 29.3 86 35 15 35.6 87 35 25 37.1 88 35 35 38.4 97 35 125 28.3 98 35 135 39.3 99 35 145 30.2 100 35 155 27.4 101 35 165 29.4 102 35 175 24.5 103 35 185 22.8 104 35 195 24.1 105 35 205 24.3 106 35 215 27.5 107 35 225 28.0 108 35 235 21.9 109 35 245 18.7 112 35 275 30.9 113 35 285 32.1 114 35 295 36.7 115 35 305 38.0 116 35 315 39.2 117 35 325 35.8 118 35 335 34.2 119 35 345 35.3 120 35 355 25.8 124 25 35 20.6 125 25 45 8.1 126 25 55 12.5 127 25 65 17.5 129 25 85 20.0 132 25 115 26.7 133 25 125 31.4 134 25 135 38.1 135 25 145 46.4 136 25 155 45.5 137 25 165 49.9 138 25 175 44.3 139 25 185 42.8 140 25 195 49.0 141 25 205 51.9 142 25 215 43.9 143 25 225 31.2 144 25 235 31.1 145 25 245 28.4 146 25 255 39.2 147 25 265 38.9 148 25 275 45.9 149 25 285 48.5 150 25 295 52.9 151 25 305 53.8 152 25 315 51.8 153 25 325 52.6 154 25 335 50.0 155 25 345 27.7 160 15 35 30.5 161 15 45 31.3 162 15 55 48.0 163 15 65 49.3 164 15 75 30.0 165 15 85 41.0 166 15 95 47.1 167 15 105 45.5 168 15 115 42.2 169 15 125 38.2 170 15 135 47.6 171 15 145 51.8 172 15 155 54.5 173 15 165 56.4 174 15 175 49.2 175 15 185 50.5 176 15 195 52.1 177 15 205 52.2 178 15 215 42.4 179 15 225 36.9 180 15 235 32.2 181 15 245 50.5 182 15 255 54.7 183 15 265 40.5 184 15 275 44.3 185 15 285 54.2 186 15 295 58.6 187 15 305 58.7 188 15 315 54.7 189 15 325 55.3 190 15 335 45.9 191 15 345 15.7 193 5 5 42.6 197 5 45 58.7 198 5 55 56.6 199 5 65 59.1 200 5 75 41.7 201 5 85 40.6 202 5 95 35.9 203 5 105 38.4 204 5 115 37.8 205 5 125 44.0 206 5 135 46.2 207 5 145 42.9 208 5 155 47.6 209 5 165 45.6 210 5 175 44.8 211 5 185 50.1 212 5 195 50.2 213 5 205 49.1 214 5 215 41.5 215 5 225 36.5 216 5 235 29.9 217 5 245 33.2 218 5 255 28.0 219 5 265 26.4 220 5 275 26.1 221 5 285 27.6 223 5 305 54.7 224 5 315 54.0 225 5 325 51.2 226 5 335 41.1 227 5 345 37.6 228 5 355 43.1 229 -5 5 26.9 230 -5 15 32.9 233 -5 45 62.2 234 -5 55 55.8 235 -5 65 54.1 236 -5 75 47.9 237 -5 85 39.9 238 -5 95 39.9 239 -5 105 41.4 240 -5 115 46.0 241 -5 125 51.0 242 -5 135 55.7 243 -5 145 47.5 244 -5 155 42.4 245 -5 165 48.0 246 -5 175 52.1 247 -5 185 56.5 248 -5 195 64.7 249 -5 205 73.0 250 -5 215 71.4 251 -5 225 75.3 252 -5 235 74.0 253 -5 245 54.5 254 -5 255 29.5 255 -5 265 19.0 256 -5 275 14.2 257 -5 285 13.9 260 -5 315 65.0 261 -5 325 68.5 262 -5 335 57.2 263 -5 345 30.4 264 -5 355 21.0 265 -15 5 7.6 266 -15 15 21.8 268 -15 35 45.2 269 -15 45 56.5 270 -15 55 66.8 271 -15 65 57.1 272 -15 75 48.9 273 -15 85 43.1 274 -15 95 43.5 275 -15 105 48.5 276 -15 115 45.1 277 -15 125 42.1 278 -15 135 49.8 279 -15 145 55.7 280 -15 155 57.1 281 -15 165 45.3 282 -15 175 46.5 283 -15 185 46.9 284 -15 195 42.1 285 -15 205 53.1 286 -15 215 51.9 287 -15 225 64.4 288 -15 235 63.4 289 -15 245 53.7 290 -15 255 30.7 291 -15 265 19.1 292 -15 275 9.3 293 -15 285 14.7 297 -15 325 54.4 298 -15 335 44.1 299 -15 345 19.4 300 -15 355 8.0 301 -25 5 16.1 302 -25 15 23.4 304 -25 35 39.5 305 -25 45 46.0 306 -25 55 53.4 307 -25 65 47.0 308 -25 75 38.1 309 -25 85 34.8 310 -25 95 34.7 311 -25 105 37.2 312 -25 115 36.4 316 -25 155 48.1 317 -25 165 43.9 318 -25 175 41.0 319 -25 185 44.4 320 -25 195 37.5 321 -25 205 35.9 322 -25 215 32.9 323 -25 225 39.6 324 -25 235 53.2 325 -25 245 53.4 326 -25 255 38.8 327 -25 265 32.9 328 -25 275 17.6 329 -25 285 20.4 332 -25 315 29.5 333 -25 325 36.6 334 -25 335 33.6 335 -25 345 25.6 336 -25 355 21.1 337 -35 5 21.2 338 -35 15 28.6 339 -35 25 27.3 340 -35 35 27.5 341 -35 45 27.2 342 -35 55 29.9 343 -35 65 24.3 344 -35 75 20.0 345 -35 85 19.7 346 -35 95 21.3 347 -35 105 24.9 348 -35 115 30.2 349 -35 125 22.8 350 -35 135 22.1 351 -35 145 24.4 352 -35 155 29.6 353 -35 165 25.8 354 -35 175 29.8 355 -35 185 30.3 356 -35 195 29.3 357 -35 205 28.0 358 -35 215 25.2 359 -35 225 34.3 360 -35 235 25.6 361 -35 245 26.2 363 -35 265 15.9 364 -35 275 22.8 365 -35 285 23.7 367 -35 305 22.2 368 -35 315 31.3 369 -35 325 29.2 370 -35 335 21.1 371 -35 345 20.1 372 -35 355 19.3 378 -45 55 13.9 379 -45 65 13.7 380 -45 75 13.0 381 -45 85 14.7 382 -45 95 13.6 383 -45 105 19.5 384 -45 115 18.4 386 -45 135 19.1 387 -45 145 22.5 388 -45 155 16.9 389 -45 165 16.9 390 -45 175 20.0 391 -45 185 20.0 392 -45 195 18.1 393 -45 205 14.1 400 -45 275 22.2 401 -45 285 23.5 402 -45 295 17.9 403 -45 305 14.0 404 -45 315 16.2 405 -45 325 19.6 406 -45 335 11.3 409 -55 10 7.3 410 -55 30 7.3 411 -55 50 9.7 412 -55 70 13.1 413 -55 90 10.1 414 -55 110 14.1 415 -55 130 14.2 416 -55 150 8.4 417 -55 170 10.0 419 -55 210 16.2 420 -55 230 4.1 421 -55 250 7.6 422 -55 270 16.2 423 -55 290 13.4 424 -55 310 9.5 425 -55 330 9.3 429 -65 50 6.6 430 -65 70 4.5 431 -65 90 1.7 432 -65 110 11.4 433 -65 130 7.0 434 -65 150 9.4 435 -65 170 5.3 436 -65 190 5.6 441 -65 290 3.7 442 -65 310 7.2 449 -75 180 9.0