Stratocumulus Frequency of Occurrence (%) December, January, February (1954 - 1997) Day, Ship Observations Only Global Average: 29.5 Zonal Averages 17 zones Lat.N Average 85 13.0 75 23.1 65 38.0 55 37.4 45 36.5 35 35.2 25 29.7 15 20.8 5 20.8 -5 19.2 -15 22.7 -25 26.3 -35 35.0 -45 39.1 -55 39.2 -65 42.1 -75 45.7 Grid Box Averages 394 filled boxes Box # Lat.N Lon.E Average 1 85 60 11.9 2 85 180 13.8 3 85 300 13.4 4 75 20 37.6 5 75 60 30.4 6 75 100 8.1 7 75 140 15.0 8 75 180 13.8 9 75 220 18.4 11 75 300 19.3 12 75 340 37.6 13 65 10 29.9 14 65 30 38.0 15 65 50 36.3 21 65 170 49.9 22 65 190 48.3 23 65 210 32.0 27 65 290 41.3 29 65 330 34.6 30 65 350 35.6 31 55 10 32.0 32 55 30 40.2 37 55 130 32.6 38 55 150 38.3 39 55 170 40.1 40 55 190 40.0 41 55 210 36.4 42 55 230 33.4 45 55 290 33.3 46 55 310 37.8 47 55 330 34.7 48 55 350 40.1 49 45 5 26.3 50 45 15 34.5 51 45 25 38.1 52 45 35 35.9 53 45 45 37.4 54 45 55 34.5 61 45 125 27.8 62 45 135 27.6 63 45 145 35.4 64 45 155 39.8 65 45 165 39.1 66 45 175 37.3 67 45 185 36.0 68 45 195 35.5 69 45 205 34.9 70 45 215 36.8 71 45 225 38.9 72 45 235 34.3 77 45 285 30.1 78 45 295 36.9 79 45 305 39.2 80 45 315 38.1 81 45 325 35.2 82 45 335 36.5 83 45 345 39.1 84 45 355 33.4 85 35 5 24.5 86 35 15 26.3 87 35 25 26.6 88 35 35 22.1 89 35 45 28.2 90 35 55 28.2 96 35 115 17.8 97 35 125 32.2 98 35 135 32.3 99 35 145 36.0 100 35 155 38.0 101 35 165 36.7 102 35 175 36.7 103 35 185 35.8 104 35 195 36.6 105 35 205 37.5 106 35 215 41.3 107 35 225 47.6 108 35 235 37.9 109 35 245 26.0 112 35 275 26.2 113 35 285 34.0 114 35 295 36.2 115 35 305 33.1 116 35 315 32.0 117 35 325 33.6 118 35 335 36.7 119 35 345 33.8 120 35 355 25.2 124 25 35 10.7 125 25 45 15.4 126 25 55 12.1 127 25 65 8.8 128 25 75 5.5 129 25 85 10.4 130 25 95 6.9 131 25 105 37.7 132 25 115 37.4 133 25 125 38.9 134 25 135 37.8 135 25 145 31.4 136 25 155 30.7 137 25 165 30.3 138 25 175 30.7 139 25 185 29.2 140 25 195 30.1 141 25 205 29.8 142 25 215 36.1 143 25 225 45.4 144 25 235 48.7 145 25 245 27.0 146 25 255 21.8 147 25 265 31.5 148 25 275 26.9 149 25 285 26.7 150 25 295 23.0 151 25 305 21.6 152 25 315 23.6 153 25 325 25.6 154 25 335 25.3 155 25 345 17.4 156 25 355 33.1 160 15 35 16.4 161 15 45 11.8 162 15 55 11.2 163 15 65 10.6 164 15 75 7.7 165 15 85 12.5 166 15 95 11.6 167 15 105 32.9 168 15 115 26.5 169 15 125 27.6 170 15 135 23.9 171 15 145 20.9 172 15 155 19.5 173 15 165 18.9 174 15 175 21.1 175 15 185 20.7 176 15 195 21.0 177 15 205 24.2 178 15 215 29.2 179 15 225 35.7 180 15 235 41.1 181 15 245 30.6 182 15 255 15.1 183 15 265 9.5 184 15 275 15.7 185 15 285 15.8 186 15 295 14.7 187 15 305 15.1 188 15 315 18.3 189 15 325 25.8 190 15 335 19.9 191 15 345 9.9 193 5 5 17.8 197 5 45 10.6 198 5 55 13.5 199 5 65 11.7 200 5 75 14.4 201 5 85 17.5 202 5 95 19.3 203 5 105 25.6 204 5 115 23.8 205 5 125 20.5 206 5 135 17.0 207 5 145 21.8 208 5 155 20.7 209 5 165 20.1 210 5 175 20.0 211 5 185 18.7 212 5 195 19.5 213 5 205 22.2 214 5 215 27.0 215 5 225 29.7 216 5 235 27.6 217 5 245 26.4 218 5 255 24.2 219 5 265 23.0 220 5 275 20.2 221 5 285 23.1 222 5 295 17.0 223 5 305 19.1 224 5 315 23.9 225 5 325 22.1 226 5 335 23.5 227 5 345 14.8 228 5 355 18.4 229 -5 5 27.9 230 -5 15 38.2 232 -5 35 12.1 233 -5 45 11.9 234 -5 55 14.3 235 -5 65 15.1 236 -5 75 17.1 237 -5 85 16.0 238 -5 95 20.7 239 -5 105 22.6 240 -5 115 23.4 241 -5 125 18.4 242 -5 135 18.7 243 -5 145 22.7 244 -5 155 21.1 245 -5 165 18.3 246 -5 175 20.5 247 -5 185 17.1 248 -5 195 14.7 249 -5 205 14.9 250 -5 215 14.1 251 -5 225 12.2 252 -5 235 12.1 253 -5 245 17.9 254 -5 255 28.4 255 -5 265 31.3 256 -5 275 27.5 257 -5 285 27.8 260 -5 315 19.7 261 -5 325 13.7 262 -5 335 16.4 263 -5 345 22.5 264 -5 355 25.1 265 -15 5 49.4 266 -15 15 43.4 268 -15 35 15.3 269 -15 45 15.8 270 -15 55 14.2 271 -15 65 14.9 272 -15 75 17.1 273 -15 85 18.2 274 -15 95 24.3 275 -15 105 29.6 276 -15 115 18.6 277 -15 125 17.4 278 -15 135 19.6 279 -15 145 20.7 280 -15 155 17.1 281 -15 165 18.6 282 -15 175 19.8 283 -15 185 18.9 284 -15 195 18.9 285 -15 205 16.9 286 -15 215 16.8 287 -15 225 12.3 288 -15 235 11.9 289 -15 245 17.2 290 -15 255 27.9 291 -15 265 35.9 292 -15 275 37.2 293 -15 285 37.8 297 -15 325 15.1 298 -15 335 22.0 299 -15 345 28.5 300 -15 355 41.8 301 -25 5 45.4 302 -25 15 40.0 304 -25 35 18.6 305 -25 45 20.1 306 -25 55 18.2 307 -25 65 18.4 308 -25 75 19.6 309 -25 85 25.1 310 -25 95 35.0 311 -25 105 43.5 312 -25 115 23.5 315 -25 145 19.4 316 -25 155 18.9 317 -25 165 22.0 318 -25 175 22.3 319 -25 185 23.5 320 -25 195 26.8 321 -25 205 24.9 322 -25 215 23.0 323 -25 225 19.0 324 -25 235 15.0 325 -25 245 13.9 326 -25 255 20.9 327 -25 265 29.5 328 -25 275 44.4 329 -25 285 56.0 332 -25 315 23.6 333 -25 325 21.3 334 -25 335 22.2 335 -25 345 22.7 336 -25 355 32.1 337 -35 5 37.5 338 -35 15 32.1 339 -35 25 27.7 340 -35 35 28.4 341 -35 45 31.1 342 -35 55 33.5 343 -35 65 34.0 344 -35 75 36.0 345 -35 85 38.5 346 -35 95 43.0 347 -35 105 51.1 348 -35 115 35.1 349 -35 125 43.6 350 -35 135 39.3 351 -35 145 31.1 352 -35 155 28.8 353 -35 165 31.4 354 -35 175 28.5 355 -35 185 28.1 356 -35 195 35.3 357 -35 205 35.7 358 -35 215 35.1 359 -35 225 34.7 360 -35 235 31.6 361 -35 245 31.7 362 -35 255 37.8 363 -35 265 43.1 364 -35 275 47.7 365 -35 285 48.3 366 -35 295 28.4 367 -35 305 24.3 368 -35 315 27.2 369 -35 325 30.9 370 -35 335 31.8 371 -35 345 31.2 372 -35 355 33.9 373 -45 5 37.3 374 -45 15 45.7 375 -45 25 39.5 376 -45 35 32.3 377 -45 45 36.2 378 -45 55 38.4 379 -45 65 41.1 380 -45 75 40.5 381 -45 85 39.7 382 -45 95 38.2 383 -45 105 40.5 384 -45 115 41.2 385 -45 125 42.3 386 -45 135 48.8 387 -45 145 38.8 388 -45 155 36.5 389 -45 165 39.5 390 -45 175 35.9 391 -45 185 34.5 392 -45 195 41.3 393 -45 205 44.3 394 -45 215 48.5 395 -45 225 41.8 396 -45 235 40.4 397 -45 245 42.7 398 -45 255 41.3 399 -45 265 39.6 400 -45 275 47.2 401 -45 285 47.3 402 -45 295 26.8 403 -45 305 27.6 404 -45 315 31.9 405 -45 325 34.5 406 -45 335 34.4 407 -45 345 35.6 408 -45 355 33.8 409 -55 10 38.0 410 -55 30 35.8 411 -55 50 36.6 412 -55 70 39.0 413 -55 90 36.8 414 -55 110 41.6 415 -55 130 45.8 416 -55 150 44.0 417 -55 170 48.6 418 -55 190 38.1 419 -55 210 33.6 420 -55 230 36.6 421 -55 250 36.9 422 -55 270 35.4 423 -55 290 38.3 424 -55 310 44.6 425 -55 330 42.2 426 -55 350 33.6 427 -65 10 45.0 428 -65 30 37.3 429 -65 50 41.8 430 -65 70 52.6 431 -65 90 51.4 432 -65 110 47.8 433 -65 130 41.8 434 -65 150 41.6 435 -65 170 40.0 436 -65 190 27.6 437 -65 210 28.0 438 -65 230 32.5 439 -65 250 33.8 440 -65 270 45.3 441 -65 290 45.9 442 -65 310 45.4 443 -65 330 53.7 444 -65 350 53.6 449 -75 180 45.8 450 -75 220 35.3 451 -75 260 48.3 452 -75 300 51.3 453 -75 340 51.7