Stratocumulus Frequency of Occurrence (%) December (1953 - 1996) Day, Ship Observations Only Global Average: 30.5 Zonal Averages 17 zones Lat.N Average 85 11.8 75 26.8 65 39.7 55 37.6 45 37.4 35 35.5 25 29.5 15 21.2 5 22.0 -5 20.9 -15 25.7 -25 28.4 -35 35.4 -45 39.2 -55 40.2 -65 42.1 -75 51.7 Grid Box Averages 380 filled boxes Box # Lat.N Lon.E Average 2 85 180 11.8 4 75 20 39.1 5 75 60 35.8 8 75 180 14.0 9 75 220 12.8 12 75 340 40.9 13 65 10 30.7 14 65 30 41.4 15 65 50 42.3 21 65 170 49.3 22 65 190 51.5 23 65 210 25.9 27 65 290 45.6 28 65 310 40.0 29 65 330 34.0 30 65 350 36.7 31 55 10 32.7 32 55 30 42.6 38 55 150 39.5 39 55 170 40.0 40 55 190 39.1 41 55 210 35.7 42 55 230 33.9 45 55 290 39.3 46 55 310 37.9 47 55 330 35.5 48 55 350 39.1 49 45 5 27.1 50 45 15 34.8 51 45 25 37.8 52 45 35 36.2 53 45 45 36.6 54 45 55 32.4 62 45 135 26.9 63 45 145 38.2 64 45 155 41.9 65 45 165 40.0 66 45 175 38.0 67 45 185 36.1 68 45 195 35.6 69 45 205 34.2 70 45 215 36.8 71 45 225 38.7 72 45 235 33.6 77 45 285 34.0 78 45 295 39.4 79 45 305 40.5 80 45 315 39.0 81 45 325 36.2 82 45 335 38.9 83 45 345 40.3 84 45 355 33.9 85 35 5 24.2 86 35 15 25.7 87 35 25 26.0 88 35 35 22.1 90 35 55 20.4 96 35 115 18.0 97 35 125 32.8 98 35 135 32.4 99 35 145 36.3 100 35 155 38.5 101 35 165 38.1 102 35 175 38.2 103 35 185 37.4 104 35 195 38.4 105 35 205 38.3 106 35 215 41.5 107 35 225 48.5 108 35 235 37.4 109 35 245 26.5 112 35 275 27.9 113 35 285 34.6 114 35 295 35.6 115 35 305 33.0 116 35 315 31.7 117 35 325 33.4 118 35 335 36.8 119 35 345 33.4 120 35 355 25.5 124 25 35 10.9 125 25 45 14.6 126 25 55 11.8 127 25 65 8.6 128 25 75 5.5 129 25 85 12.0 131 25 105 30.7 132 25 115 36.9 133 25 125 38.5 134 25 135 38.0 135 25 145 31.5 136 25 155 30.2 137 25 165 30.7 138 25 175 30.9 139 25 185 27.4 140 25 195 30.0 141 25 205 29.8 142 25 215 35.5 143 25 225 46.2 144 25 235 50.4 145 25 245 28.0 146 25 255 24.2 147 25 265 31.0 148 25 275 26.7 149 25 285 26.5 150 25 295 22.9 151 25 305 20.0 152 25 315 21.7 153 25 325 23.5 154 25 335 24.3 155 25 345 17.0 160 15 35 14.8 161 15 45 8.3 162 15 55 11.1 163 15 65 11.6 164 15 75 9.8 165 15 85 17.0 166 15 95 17.5 167 15 105 33.0 168 15 115 28.9 169 15 125 28.0 170 15 135 23.6 171 15 145 19.0 172 15 155 19.3 173 15 165 17.7 174 15 175 20.8 175 15 185 21.1 176 15 195 20.8 177 15 205 25.7 178 15 215 30.7 179 15 225 36.1 180 15 235 40.6 181 15 245 31.2 182 15 255 17.4 183 15 265 11.6 184 15 275 17.2 185 15 285 15.7 186 15 295 14.4 187 15 305 14.2 188 15 315 16.6 189 15 325 22.8 190 15 335 19.9 191 15 345 11.5 193 5 5 19.4 197 5 45 10.2 198 5 55 14.9 199 5 65 13.1 200 5 75 17.6 201 5 85 20.0 202 5 95 20.8 203 5 105 27.6 204 5 115 23.7 205 5 125 18.9 206 5 135 16.9 207 5 145 20.4 208 5 155 19.4 209 5 165 20.8 210 5 175 19.9 211 5 185 17.4 212 5 195 18.1 213 5 205 21.1 214 5 215 28.8 215 5 225 31.8 216 5 235 33.1 217 5 245 32.5 218 5 255 27.9 219 5 265 28.8 220 5 275 26.3 221 5 285 26.1 223 5 305 17.5 224 5 315 20.8 225 5 325 19.9 226 5 335 23.0 227 5 345 16.9 228 5 355 20.6 229 -5 5 34.9 230 -5 15 46.4 232 -5 35 10.7 233 -5 45 10.9 234 -5 55 13.7 235 -5 65 15.1 236 -5 75 16.0 237 -5 85 16.2 238 -5 95 19.2 239 -5 105 22.8 240 -5 115 21.3 241 -5 125 17.3 242 -5 135 16.5 243 -5 145 22.1 244 -5 155 18.8 245 -5 165 18.3 246 -5 175 20.8 247 -5 185 19.5 248 -5 195 15.4 249 -5 205 13.5 250 -5 215 18.1 251 -5 225 11.7 252 -5 235 12.9 253 -5 245 21.6 254 -5 255 35.9 255 -5 265 42.8 256 -5 275 32.9 257 -5 285 33.1 260 -5 315 16.1 261 -5 325 12.6 262 -5 335 16.4 263 -5 345 26.9 264 -5 355 35.9 265 -15 5 58.3 266 -15 15 45.0 268 -15 35 17.0 269 -15 45 13.7 270 -15 55 13.8 271 -15 65 12.8 272 -15 75 17.2 273 -15 85 21.2 274 -15 95 24.3 275 -15 105 32.5 276 -15 115 16.9 277 -15 125 15.4 278 -15 135 16.8 279 -15 145 17.2 280 -15 155 15.1 281 -15 165 20.1 282 -15 175 20.5 283 -15 185 21.4 284 -15 195 22.9 285 -15 205 18.4 286 -15 215 19.2 287 -15 225 13.8 288 -15 235 14.3 289 -15 245 19.2 290 -15 255 35.5 291 -15 265 41.5 292 -15 275 46.6 293 -15 285 46.3 297 -15 325 18.0 298 -15 335 26.3 299 -15 345 40.9 300 -15 355 56.5 301 -25 5 47.8 302 -25 15 40.3 304 -25 35 20.3 305 -25 45 22.4 306 -25 55 18.8 307 -25 65 19.8 308 -25 75 20.1 309 -25 85 23.9 310 -25 95 35.4 311 -25 105 43.6 312 -25 115 23.1 315 -25 145 16.3 316 -25 155 16.5 317 -25 165 20.5 318 -25 175 21.5 319 -25 185 22.3 320 -25 195 25.4 321 -25 205 26.3 322 -25 215 28.6 323 -25 225 23.5 324 -25 235 18.6 325 -25 245 19.2 326 -25 255 29.4 327 -25 265 29.9 328 -25 275 46.6 329 -25 285 59.9 332 -25 315 26.8 333 -25 325 25.3 334 -25 335 27.0 335 -25 345 28.5 336 -25 355 38.8 337 -35 5 34.8 338 -35 15 32.1 339 -35 25 26.6 340 -35 35 27.9 341 -35 45 32.3 342 -35 55 33.1 343 -35 65 33.7 344 -35 75 37.8 345 -35 85 37.1 346 -35 95 42.8 347 -35 105 50.2 348 -35 115 36.4 349 -35 125 42.8 350 -35 135 39.0 351 -35 145 31.5 352 -35 155 27.9 353 -35 165 29.9 354 -35 175 28.5 355 -35 185 26.9 356 -35 195 34.8 357 -35 205 35.5 358 -35 215 37.4 359 -35 225 37.0 360 -35 235 35.3 361 -35 245 35.9 362 -35 255 39.6 363 -35 265 45.9 364 -35 275 49.9 365 -35 285 52.1 367 -35 305 25.8 368 -35 315 30.0 369 -35 325 29.3 370 -35 335 31.2 371 -35 345 31.9 372 -35 355 32.1 373 -45 5 35.8 374 -45 15 44.4 375 -45 25 37.0 376 -45 35 30.2 377 -45 45 43.4 378 -45 55 41.7 379 -45 65 41.3 380 -45 75 45.3 381 -45 85 38.3 382 -45 95 33.9 383 -45 105 34.2 384 -45 115 39.3 385 -45 125 37.7 386 -45 135 48.3 387 -45 145 41.5 388 -45 155 36.6 389 -45 165 39.4 390 -45 175 38.0 391 -45 185 35.9 392 -45 195 44.0 393 -45 205 44.8 394 -45 215 46.4 395 -45 225 50.3 396 -45 235 36.4 397 -45 245 45.8 398 -45 255 40.1 399 -45 265 36.3 400 -45 275 45.5 401 -45 285 44.8 402 -45 295 28.2 403 -45 305 28.1 404 -45 315 31.6 405 -45 325 38.0 406 -45 335 39.4 407 -45 345 34.1 408 -45 355 32.0 409 -55 10 40.0 410 -55 30 38.9 411 -55 50 35.8 412 -55 70 40.5 413 -55 90 39.3 414 -55 110 34.0 415 -55 130 47.5 416 -55 150 46.6 417 -55 170 49.4 418 -55 190 42.5 419 -55 210 37.4 420 -55 230 31.0 421 -55 250 36.3 422 -55 270 35.3 423 -55 290 38.0 424 -55 310 48.1 425 -55 330 44.4 426 -55 350 38.0 427 -65 10 50.3 428 -65 30 39.0 429 -65 50 40.7 430 -65 70 51.1 431 -65 90 44.9 432 -65 110 43.9 433 -65 130 34.0 434 -65 150 34.2 435 -65 170 38.8 436 -65 190 34.3 437 -65 210 34.7 438 -65 230 35.9 439 -65 250 29.3 440 -65 270 48.1 441 -65 290 43.4 442 -65 310 49.8 443 -65 330 53.3 444 -65 350 51.7 449 -75 180 49.4 453 -75 340 55.4