Stratocumulus Frequency of Occurrence (%) December (1953 - 1996) , Ship Observations Only Global Average: 31.5 Zonal Averages 17 zones Lat.N Average 85 9.9 75 22.9 65 40.0 55 37.3 45 37.1 35 35.3 25 29.9 15 21.9 5 22.6 -5 22.7 -15 27.9 -25 31.0 -35 37.4 -45 39.9 -55 40.8 -65 42.3 -75 52.7 Grid Box Averages 386 filled boxes Box # Lat.N Lon.E Average 1 85 60 13.2 2 85 180 11.5 3 85 300 3.0 4 75 20 36.3 5 75 60 35.8 6 75 100 10.9 7 75 140 10.6 8 75 180 12.4 9 75 220 15.2 12 75 340 38.8 13 65 10 30.8 14 65 30 38.4 15 65 50 36.9 21 65 170 51.3 22 65 190 57.6 23 65 210 22.2 27 65 290 44.7 28 65 310 37.9 29 65 330 34.9 30 65 350 35.6 31 55 10 31.8 32 55 30 41.9 38 55 150 38.1 39 55 170 39.7 40 55 190 40.0 41 55 210 36.0 42 55 230 33.6 45 55 290 36.9 46 55 310 35.9 47 55 330 35.8 48 55 350 39.5 49 45 5 26.5 50 45 15 33.4 51 45 25 32.2 52 45 35 35.1 53 45 45 31.4 54 45 55 31.5 61 45 125 25.6 62 45 135 26.0 63 45 145 37.3 64 45 155 42.2 65 45 165 40.2 66 45 175 38.0 67 45 185 37.4 68 45 195 34.8 69 45 205 34.4 70 45 215 36.5 71 45 225 38.5 72 45 235 33.4 77 45 285 32.1 78 45 295 39.2 79 45 305 39.8 80 45 315 39.0 81 45 325 36.1 82 45 335 38.6 83 45 345 40.2 84 45 355 33.1 85 35 5 24.3 86 35 15 24.5 87 35 25 23.6 88 35 35 20.3 89 35 45 20.9 90 35 55 21.5 96 35 115 16.9 97 35 125 32.0 98 35 135 32.0 99 35 145 36.5 100 35 155 39.6 101 35 165 38.6 102 35 175 38.8 103 35 185 38.1 104 35 195 38.0 105 35 205 38.2 106 35 215 41.6 107 35 225 48.0 108 35 235 37.4 109 35 245 25.8 112 35 275 28.9 113 35 285 33.0 114 35 295 34.5 115 35 305 32.9 116 35 315 31.1 117 35 325 33.5 118 35 335 37.5 119 35 345 33.2 120 35 355 24.8 124 25 35 8.8 125 25 45 15.5 126 25 55 11.0 127 25 65 7.9 128 25 75 4.8 129 25 85 13.7 131 25 105 30.7 132 25 115 34.0 133 25 125 39.0 134 25 135 39.8 135 25 145 32.8 136 25 155 31.6 137 25 165 30.3 138 25 175 31.5 139 25 185 30.4 140 25 195 30.6 141 25 205 30.6 142 25 215 36.0 143 25 225 47.2 144 25 235 49.7 145 25 245 26.7 146 25 255 23.0 147 25 265 31.2 148 25 275 28.3 149 25 285 25.8 150 25 295 22.5 151 25 305 19.9 152 25 315 22.2 153 25 325 24.3 154 25 335 24.8 155 25 345 16.7 160 15 35 12.2 161 15 45 7.5 162 15 55 11.3 163 15 65 11.7 164 15 75 10.0 165 15 85 18.3 166 15 95 17.3 167 15 105 33.0 168 15 115 29.3 169 15 125 29.1 170 15 135 24.2 171 15 145 20.2 172 15 155 19.6 173 15 165 17.9 174 15 175 21.4 175 15 185 22.3 176 15 195 22.2 177 15 205 26.8 178 15 215 30.1 179 15 225 38.5 180 15 235 44.3 181 15 245 32.5 182 15 255 17.1 183 15 265 12.3 184 15 275 18.0 185 15 285 15.9 186 15 295 14.6 187 15 305 13.8 188 15 315 17.3 189 15 325 23.7 190 15 335 20.5 191 15 345 10.4 193 5 5 19.5 197 5 45 11.2 198 5 55 15.4 199 5 65 13.7 200 5 75 17.9 201 5 85 20.5 202 5 95 21.0 203 5 105 28.0 204 5 115 25.1 205 5 125 19.0 206 5 135 16.4 207 5 145 21.7 208 5 155 20.5 209 5 165 19.2 210 5 175 20.2 211 5 185 18.0 212 5 195 19.9 213 5 205 22.1 214 5 215 28.1 215 5 225 31.9 216 5 235 34.1 217 5 245 31.5 218 5 255 31.3 219 5 265 31.1 220 5 275 27.8 221 5 285 25.4 223 5 305 17.9 224 5 315 21.0 225 5 325 20.8 226 5 335 23.1 227 5 345 17.3 228 5 355 20.9 229 -5 5 39.1 230 -5 15 43.4 232 -5 35 14.4 233 -5 45 11.8 234 -5 55 16.1 235 -5 65 14.8 236 -5 75 16.5 237 -5 85 16.9 238 -5 95 19.4 239 -5 105 22.9 240 -5 115 22.2 241 -5 125 16.6 242 -5 135 17.2 243 -5 145 21.8 244 -5 155 19.3 245 -5 165 20.4 246 -5 175 17.8 247 -5 185 18.1 248 -5 195 16.1 249 -5 205 17.8 250 -5 215 17.4 251 -5 225 13.7 252 -5 235 14.3 253 -5 245 22.8 254 -5 255 41.3 255 -5 265 48.8 256 -5 275 38.0 257 -5 285 33.0 260 -5 315 15.2 261 -5 325 12.6 262 -5 335 18.6 263 -5 345 33.1 264 -5 355 42.8 265 -15 5 64.9 266 -15 15 43.1 268 -15 35 17.0 269 -15 45 14.4 270 -15 55 13.5 271 -15 65 13.8 272 -15 75 19.7 273 -15 85 22.1 274 -15 95 26.6 275 -15 105 33.2 276 -15 115 17.2 277 -15 125 15.5 278 -15 135 15.5 279 -15 145 17.7 280 -15 155 16.4 281 -15 165 20.1 282 -15 175 20.8 283 -15 185 20.5 284 -15 195 23.2 285 -15 205 22.8 286 -15 215 20.7 287 -15 225 17.1 288 -15 235 17.5 289 -15 245 20.1 290 -15 255 40.0 291 -15 265 50.6 292 -15 275 53.2 293 -15 285 46.6 297 -15 325 17.6 298 -15 335 28.1 299 -15 345 45.3 300 -15 355 62.1 301 -25 5 55.4 302 -25 15 38.3 304 -25 35 21.2 305 -25 45 24.5 306 -25 55 19.9 307 -25 65 22.9 308 -25 75 25.1 309 -25 85 30.6 310 -25 95 41.0 311 -25 105 44.3 312 -25 115 24.9 315 -25 145 15.4 316 -25 155 18.6 317 -25 165 23.6 318 -25 175 23.7 319 -25 185 24.6 320 -25 195 27.7 321 -25 205 27.8 322 -25 215 30.6 323 -25 225 22.6 324 -25 235 19.2 325 -25 245 21.7 326 -25 255 35.5 327 -25 265 33.0 328 -25 275 51.1 329 -25 285 60.0 332 -25 315 27.2 333 -25 325 24.8 334 -25 335 28.2 335 -25 345 32.1 336 -25 355 43.4 337 -35 5 40.0 338 -35 15 30.8 339 -35 25 28.3 340 -35 35 29.9 341 -35 45 32.6 342 -35 55 35.3 343 -35 65 38.5 344 -35 75 40.9 345 -35 85 41.3 346 -35 95 47.9 347 -35 105 50.5 348 -35 115 37.0 349 -35 125 43.1 350 -35 135 39.8 351 -35 145 33.2 352 -35 155 31.1 353 -35 165 33.4 354 -35 175 29.5 355 -35 185 30.0 356 -35 195 33.8 357 -35 205 36.3 358 -35 215 38.4 359 -35 225 37.8 360 -35 235 35.6 361 -35 245 40.0 362 -35 255 38.9 363 -35 265 48.3 364 -35 275 52.2 365 -35 285 51.8 367 -35 305 26.8 368 -35 315 31.1 369 -35 325 31.3 370 -35 335 35.5 371 -35 345 34.0 372 -35 355 37.1 373 -45 5 34.5 374 -45 15 41.9 375 -45 25 36.7 376 -45 35 32.0 377 -45 45 42.2 378 -45 55 40.0 379 -45 65 40.7 380 -45 75 46.0 381 -45 85 39.7 382 -45 95 34.2 383 -45 105 36.7 384 -45 115 41.5 385 -45 125 39.1 386 -45 135 47.4 387 -45 145 43.1 388 -45 155 38.6 389 -45 165 41.3 390 -45 175 40.5 391 -45 185 38.5 392 -45 195 39.8 393 -45 205 46.3 394 -45 215 44.6 395 -45 225 51.2 396 -45 235 42.0 397 -45 245 49.3 398 -45 255 39.7 399 -45 265 39.0 400 -45 275 48.1 401 -45 285 43.9 402 -45 295 31.0 403 -45 305 30.2 404 -45 315 32.5 405 -45 325 40.2 406 -45 335 38.9 407 -45 345 34.9 408 -45 355 30.1 409 -55 10 39.6 410 -55 30 36.8 411 -55 50 35.5 412 -55 70 39.6 413 -55 90 37.2 414 -55 110 36.2 415 -55 130 48.4 416 -55 150 46.4 417 -55 170 51.5 418 -55 190 43.9 419 -55 210 38.3 420 -55 230 36.7 421 -55 250 37.2 422 -55 270 36.9 423 -55 290 39.7 424 -55 310 46.5 425 -55 330 46.0 426 -55 350 37.8 427 -65 10 54.4 428 -65 30 41.8 429 -65 50 40.0 430 -65 70 51.7 431 -65 90 46.7 432 -65 110 42.6 433 -65 130 34.0 434 -65 150 36.2 435 -65 170 38.0 436 -65 190 33.5 437 -65 210 33.6 438 -65 230 33.3 439 -65 250 26.8 440 -65 270 50.4 441 -65 290 43.5 442 -65 310 48.5 443 -65 330 55.0 444 -65 350 50.9 449 -75 180 51.0 453 -75 340 55.6