Stratocumulus Frequency of Occurrence (%) September, October, November (1954 - 1997) Day, Ship Observations Only Global Average: 31.1 Zonal Averages 17 zones Lat.N Average 85 35.2 75 40.3 65 41.4 55 38.2 45 36.1 35 31.0 25 22.6 15 19.3 5 21.9 -5 22.1 -15 28.4 -25 32.9 -35 37.7 -45 39.2 -55 42.3 -65 42.1 -75 37.4 Grid Box Averages 394 filled boxes Box # Lat.N Lon.E Average 1 85 60 36.1 2 85 180 35.2 3 85 300 33.8 4 75 20 41.6 5 75 60 42.2 6 75 100 37.7 7 75 140 40.0 8 75 180 34.7 9 75 220 34.8 10 75 260 56.8 11 75 300 47.9 12 75 340 41.8 13 65 10 33.3 14 65 30 43.0 15 65 50 41.8 16 65 70 42.4 20 65 150 37.1 21 65 170 48.2 22 65 190 50.8 23 65 210 27.2 24 65 230 46.1 25 65 250 61.2 26 65 270 55.0 27 65 290 50.5 28 65 310 36.8 29 65 330 33.0 30 65 350 36.5 31 55 10 29.6 32 55 30 38.1 37 55 130 30.5 38 55 150 37.1 39 55 170 40.6 40 55 190 42.1 41 55 210 37.3 42 55 230 32.5 44 55 270 47.7 45 55 290 40.9 46 55 310 38.2 47 55 330 36.8 48 55 350 38.5 49 45 5 19.5 50 45 15 24.9 51 45 25 26.6 52 45 35 25.6 53 45 45 26.7 54 45 55 23.9 61 45 125 25.1 62 45 135 25.3 63 45 145 32.7 64 45 155 39.4 65 45 165 40.7 66 45 175 40.1 67 45 185 39.9 68 45 195 39.4 69 45 205 37.7 70 45 215 38.6 71 45 225 39.9 72 45 235 33.2 77 45 285 26.3 78 45 295 28.3 79 45 305 33.4 80 45 315 36.4 81 45 325 35.6 82 45 335 36.6 83 45 345 39.4 84 45 355 30.2 85 35 5 18.8 86 35 15 18.0 87 35 25 14.4 88 35 35 11.3 89 35 45 29.4 90 35 55 20.8 96 35 115 20.0 97 35 125 24.9 98 35 135 25.8 99 35 145 32.9 100 35 155 35.2 101 35 165 36.2 102 35 175 37.3 103 35 185 36.6 104 35 195 37.1 105 35 205 36.8 106 35 215 39.0 107 35 225 46.1 108 35 235 37.1 109 35 245 32.5 112 35 275 18.4 113 35 285 26.1 114 35 295 26.8 115 35 305 25.5 116 35 315 24.5 117 35 325 26.9 118 35 335 30.7 119 35 345 28.3 120 35 355 19.5 124 25 35 4.7 125 25 45 7.2 126 25 55 4.9 127 25 65 9.8 128 25 75 11.4 129 25 85 15.3 130 25 95 18.4 131 25 105 25.9 132 25 115 28.8 133 25 125 26.5 134 25 135 22.3 135 25 145 19.1 136 25 155 20.2 137 25 165 21.1 138 25 175 23.2 139 25 185 20.8 140 25 195 21.0 141 25 205 22.8 142 25 215 30.2 143 25 225 43.3 144 25 235 49.1 145 25 245 26.7 146 25 255 16.7 147 25 265 19.7 148 25 275 18.7 149 25 285 19.0 150 25 295 16.1 151 25 305 15.0 152 25 315 16.0 153 25 325 18.6 154 25 335 20.5 155 25 345 15.9 156 25 355 13.1 160 15 35 6.6 161 15 45 6.5 162 15 55 12.2 163 15 65 13.2 164 15 75 16.9 165 15 85 16.9 166 15 95 18.8 167 15 105 21.8 168 15 115 22.5 169 15 125 22.5 170 15 135 18.5 171 15 145 16.5 172 15 155 16.8 173 15 165 16.2 174 15 175 17.5 175 15 185 17.7 176 15 195 17.3 177 15 205 21.1 178 15 215 25.2 179 15 225 32.5 180 15 235 35.4 181 15 245 25.8 182 15 255 17.3 183 15 265 19.5 184 15 275 20.1 185 15 285 15.0 186 15 295 12.7 187 15 305 13.8 188 15 315 17.0 189 15 325 21.7 190 15 335 20.2 191 15 345 13.2 193 5 5 25.6 197 5 45 10.7 198 5 55 11.9 199 5 65 12.6 200 5 75 17.9 201 5 85 19.1 202 5 95 22.0 203 5 105 21.9 204 5 115 21.5 205 5 125 17.4 206 5 135 17.4 207 5 145 18.9 208 5 155 17.9 209 5 165 18.2 210 5 175 18.6 211 5 185 18.2 212 5 195 17.8 213 5 205 20.3 214 5 215 26.3 215 5 225 25.2 216 5 235 31.3 217 5 245 33.0 218 5 255 34.9 219 5 265 38.0 220 5 275 33.0 221 5 285 29.1 222 5 295 17.8 223 5 305 14.2 224 5 315 16.3 225 5 325 16.3 226 5 335 19.9 227 5 345 24.0 228 5 355 27.7 229 -5 5 45.5 230 -5 15 54.2 232 -5 35 13.5 233 -5 45 10.9 234 -5 55 14.0 235 -5 65 16.6 236 -5 75 19.4 237 -5 85 19.0 238 -5 95 20.5 239 -5 105 21.1 240 -5 115 13.5 241 -5 125 11.6 242 -5 135 13.3 243 -5 145 18.8 244 -5 155 20.1 245 -5 165 17.5 246 -5 175 16.2 247 -5 185 16.4 248 -5 195 11.8 249 -5 205 12.3 250 -5 215 12.3 251 -5 225 10.5 252 -5 235 11.2 253 -5 245 21.4 254 -5 255 36.4 255 -5 265 51.8 256 -5 275 51.0 257 -5 285 43.1 260 -5 315 13.4 261 -5 325 11.5 262 -5 335 18.5 263 -5 345 35.1 264 -5 355 46.5 265 -15 5 68.0 266 -15 15 46.0 268 -15 35 14.8 269 -15 45 10.6 270 -15 55 17.0 271 -15 65 20.1 272 -15 75 21.8 273 -15 85 24.3 274 -15 95 23.8 275 -15 105 27.3 276 -15 115 9.9 277 -15 125 8.3 278 -15 135 10.1 279 -15 145 15.6 280 -15 155 17.0 281 -15 165 20.7 282 -15 175 25.6 283 -15 185 21.6 284 -15 195 21.1 285 -15 205 20.4 286 -15 215 17.7 287 -15 225 13.5 288 -15 235 14.8 289 -15 245 24.2 290 -15 255 35.3 291 -15 265 48.2 292 -15 275 70.0 293 -15 285 64.7 297 -15 325 18.1 298 -15 335 28.6 299 -15 345 45.4 300 -15 355 67.3 301 -25 5 54.5 302 -25 15 37.8 304 -25 35 22.3 305 -25 45 21.9 306 -25 55 21.0 307 -25 65 27.6 308 -25 75 31.5 309 -25 85 36.4 310 -25 95 37.5 311 -25 105 41.3 312 -25 115 21.2 315 -25 145 14.7 316 -25 155 17.4 317 -25 165 23.9 318 -25 175 26.6 319 -25 185 29.7 320 -25 195 31.7 321 -25 205 31.3 322 -25 215 32.3 323 -25 225 31.4 324 -25 235 23.0 325 -25 245 21.1 326 -25 255 28.1 327 -25 265 43.5 328 -25 275 57.0 329 -25 285 58.1 332 -25 315 26.3 333 -25 325 27.1 334 -25 335 30.3 335 -25 345 32.4 336 -25 355 46.7 337 -35 5 45.3 338 -35 15 33.1 339 -35 25 28.7 340 -35 35 31.3 341 -35 45 35.4 342 -35 55 36.3 343 -35 65 39.8 344 -35 75 41.8 345 -35 85 42.7 346 -35 95 43.1 347 -35 105 47.5 348 -35 115 35.5 349 -35 125 38.3 350 -35 135 38.1 351 -35 145 31.7 352 -35 155 28.0 353 -35 165 32.4 354 -35 175 30.3 355 -35 185 33.1 356 -35 195 37.4 357 -35 205 37.0 358 -35 215 40.1 359 -35 225 35.4 360 -35 235 36.2 361 -35 245 41.5 362 -35 255 38.6 363 -35 265 46.2 364 -35 275 51.0 365 -35 285 45.7 366 -35 295 23.4 367 -35 305 27.1 368 -35 315 30.7 369 -35 325 34.0 370 -35 335 33.9 371 -35 345 36.8 372 -35 355 41.0 373 -45 5 50.5 374 -45 15 42.7 375 -45 25 39.9 376 -45 35 38.3 377 -45 45 43.5 378 -45 55 40.9 379 -45 65 38.5 380 -45 75 37.0 381 -45 85 37.8 382 -45 95 32.9 383 -45 105 33.7 384 -45 115 40.6 385 -45 125 37.6 386 -45 135 44.0 387 -45 145 37.4 388 -45 155 37.2 389 -45 165 37.9 390 -45 175 37.5 391 -45 185 39.9 392 -45 195 40.5 393 -45 205 40.6 394 -45 215 36.8 395 -45 225 38.2 396 -45 235 38.8 397 -45 245 38.6 398 -45 255 39.8 399 -45 265 35.0 400 -45 275 49.4 401 -45 285 40.3 402 -45 295 31.4 403 -45 305 30.1 404 -45 315 37.3 405 -45 325 42.2 406 -45 335 44.0 407 -45 345 39.8 408 -45 355 38.0 409 -55 10 38.5 410 -55 30 37.3 411 -55 50 37.0 412 -55 70 44.5 413 -55 90 47.1 414 -55 110 39.8 415 -55 130 43.9 416 -55 150 47.6 417 -55 170 55.9 418 -55 190 40.9 419 -55 210 40.8 420 -55 230 45.6 421 -55 250 38.8 422 -55 270 36.1 423 -55 290 37.7 424 -55 310 46.9 425 -55 330 38.4 426 -55 350 44.3 427 -65 10 62.7 429 -65 50 37.4 430 -65 70 57.3 431 -65 90 50.5 432 -65 110 42.4 433 -65 130 28.6 434 -65 150 42.0 435 -65 170 49.9 436 -65 190 34.6 441 -65 290 46.6 442 -65 310 47.3 443 -65 330 14.5 444 -65 350 34.0 449 -75 180 44.3 453 -75 340 26.4