Stratocumulus Frequency of Occurrence (%) September (1954 - 1997) , Ship Observations Only Global Average: 31.4 Zonal Averages 16 zones Lat.N Average 85 36.9 75 42.0 65 40.9 55 38.6 45 35.4 35 27.6 25 20.3 15 20.7 5 22.9 -5 23.6 -15 30.4 -25 35.7 -35 37.6 -45 38.6 -55 42.6 -65 40.3 Grid Box Averages 371 filled boxes Box # Lat.N Lon.E Average 1 85 60 35.3 2 85 180 37.3 3 85 300 38.4 4 75 20 41.9 5 75 60 46.8 6 75 100 41.2 7 75 140 42.3 8 75 180 36.4 9 75 220 37.1 10 75 260 56.1 11 75 300 45.5 12 75 340 42.9 13 65 10 34.6 14 65 30 44.4 15 65 50 41.3 16 65 70 43.6 20 65 150 41.0 21 65 170 50.2 22 65 190 50.0 23 65 210 28.0 24 65 230 41.2 25 65 250 54.2 26 65 270 53.3 27 65 290 45.0 28 65 310 35.7 29 65 330 32.9 30 65 350 38.2 31 55 10 30.1 32 55 30 32.6 37 55 130 27.8 38 55 150 36.0 39 55 170 41.8 40 55 190 42.5 41 55 210 38.9 42 55 230 32.6 44 55 270 43.6 45 55 290 39.0 46 55 310 37.4 47 55 330 38.6 48 55 350 39.6 49 45 5 15.9 50 45 15 16.7 51 45 25 17.1 52 45 35 18.9 53 45 45 18.9 54 45 55 14.8 62 45 135 24.2 63 45 145 30.8 64 45 155 37.9 65 45 165 41.3 66 45 175 42.1 67 45 185 42.3 68 45 195 40.7 69 45 205 37.9 70 45 215 41.3 71 45 225 43.8 72 45 235 33.3 77 45 285 22.1 78 45 295 22.2 79 45 305 27.8 80 45 315 33.5 81 45 325 34.6 82 45 335 35.2 83 45 345 39.3 84 45 355 29.2 85 35 5 16.2 86 35 15 11.7 87 35 25 6.3 88 35 35 7.9 90 35 55 14.9 96 35 115 20.1 97 35 125 23.2 98 35 135 23.3 99 35 145 31.2 100 35 155 32.3 101 35 165 33.3 102 35 175 33.8 103 35 185 33.3 104 35 195 31.8 105 35 205 31.9 106 35 215 38.4 107 35 225 48.9 108 35 235 39.1 109 35 245 39.9 112 35 275 16.7 113 35 285 20.7 114 35 295 20.7 115 35 305 19.0 116 35 315 18.6 117 35 325 20.5 118 35 335 25.4 119 35 345 27.9 120 35 355 16.6 124 25 35 3.5 125 25 45 4.1 126 25 55 5.5 127 25 65 18.7 128 25 75 15.4 129 25 85 17.6 130 25 95 18.4 131 25 105 23.7 132 25 115 22.9 133 25 125 21.6 134 25 135 16.7 135 25 145 15.1 136 25 155 16.4 137 25 165 15.4 138 25 175 17.8 139 25 185 15.4 140 25 195 13.9 141 25 205 19.9 142 25 215 30.3 143 25 225 45.0 144 25 235 52.3 145 25 245 27.4 146 25 255 18.6 147 25 265 16.1 148 25 275 15.8 149 25 285 15.7 150 25 295 13.0 151 25 305 12.0 152 25 315 12.9 153 25 325 18.1 154 25 335 23.3 155 25 345 16.5 160 15 35 7.9 161 15 45 9.7 162 15 55 18.5 163 15 65 19.7 164 15 75 20.5 165 15 85 20.3 166 15 95 21.7 167 15 105 19.8 168 15 115 22.1 169 15 125 22.7 170 15 135 19.8 171 15 145 19.1 172 15 155 19.2 173 15 165 14.1 174 15 175 15.2 175 15 185 16.3 176 15 195 17.8 177 15 205 21.8 178 15 215 27.0 179 15 225 35.5 180 15 235 35.9 181 15 245 24.5 182 15 255 21.9 183 15 265 24.8 184 15 275 20.1 185 15 285 15.8 186 15 295 12.4 187 15 305 13.2 188 15 315 17.1 189 15 325 24.6 190 15 335 23.5 191 15 345 16.9 193 5 5 32.0 197 5 45 11.4 198 5 55 11.6 199 5 65 14.1 200 5 75 17.9 201 5 85 20.6 202 5 95 23.9 203 5 105 22.4 204 5 115 22.8 205 5 125 19.8 206 5 135 19.1 207 5 145 20.3 208 5 155 19.0 209 5 165 16.2 210 5 175 17.0 211 5 185 14.6 212 5 195 19.6 213 5 205 22.6 214 5 215 25.7 215 5 225 25.6 216 5 235 28.2 217 5 245 35.1 218 5 255 39.2 219 5 265 38.4 220 5 275 33.7 221 5 285 32.2 223 5 305 13.3 224 5 315 17.6 225 5 325 16.8 226 5 335 20.7 227 5 345 30.6 228 5 355 37.2 229 -5 5 50.9 230 -5 15 50.3 232 -5 35 16.4 233 -5 45 14.1 234 -5 55 16.2 235 -5 65 19.0 236 -5 75 20.4 237 -5 85 21.9 238 -5 95 20.0 239 -5 105 20.4 240 -5 115 11.5 241 -5 125 11.8 242 -5 135 14.7 243 -5 145 19.9 244 -5 155 22.4 245 -5 165 17.2 246 -5 175 15.3 247 -5 185 12.9 248 -5 195 12.4 249 -5 205 13.0 250 -5 215 13.4 251 -5 225 11.9 252 -5 235 12.5 253 -5 245 24.6 254 -5 255 44.3 255 -5 265 56.4 256 -5 275 54.6 257 -5 285 47.9 260 -5 315 11.7 261 -5 325 12.9 262 -5 335 18.6 263 -5 345 33.5 264 -5 355 49.2 265 -15 5 70.9 266 -15 15 44.5 268 -15 35 14.1 269 -15 45 9.9 270 -15 55 20.4 271 -15 65 25.4 272 -15 75 28.1 273 -15 85 27.6 274 -15 95 26.7 275 -15 105 27.1 276 -15 115 8.4 277 -15 125 5.7 278 -15 135 9.1 279 -15 145 17.8 280 -15 155 20.5 281 -15 165 22.9 282 -15 175 27.1 283 -15 185 23.9 284 -15 195 22.1 285 -15 205 18.5 286 -15 215 18.5 287 -15 225 14.0 288 -15 235 15.4 289 -15 245 26.9 290 -15 255 39.6 291 -15 265 56.3 292 -15 275 71.3 293 -15 285 67.5 297 -15 325 17.8 298 -15 335 33.8 299 -15 345 46.7 300 -15 355 68.3 301 -25 5 59.9 302 -25 15 34.8 304 -25 35 21.6 305 -25 45 21.8 306 -25 55 23.4 307 -25 65 35.9 308 -25 75 39.5 309 -25 85 45.0 310 -25 95 40.9 311 -25 105 38.9 312 -25 115 17.8 315 -25 145 11.3 316 -25 155 15.9 317 -25 165 26.5 318 -25 175 31.0 319 -25 185 30.3 320 -25 195 32.7 321 -25 205 35.1 322 -25 215 32.1 323 -25 225 33.5 324 -25 235 29.5 325 -25 245 28.0 326 -25 255 34.3 327 -25 265 50.4 328 -25 275 58.8 329 -25 285 55.3 332 -25 315 26.6 333 -25 325 27.0 334 -25 335 32.6 335 -25 345 35.0 336 -25 355 50.3 337 -35 5 49.2 338 -35 15 31.8 339 -35 25 26.9 340 -35 35 32.5 341 -35 45 36.2 342 -35 55 39.1 343 -35 65 39.2 344 -35 75 44.0 345 -35 85 49.3 346 -35 95 46.2 347 -35 105 45.9 348 -35 115 35.5 349 -35 125 35.1 350 -35 135 35.7 351 -35 145 32.1 352 -35 155 26.2 353 -35 165 30.2 354 -35 175 31.7 355 -35 185 33.7 356 -35 195 35.9 357 -35 205 38.4 358 -35 215 34.2 359 -35 225 30.4 360 -35 235 37.0 361 -35 245 35.1 362 -35 255 40.3 363 -35 265 44.7 364 -35 275 52.8 365 -35 285 40.2 366 -35 295 19.6 367 -35 305 26.0 368 -35 315 30.8 369 -35 325 40.9 370 -35 335 35.2 371 -35 345 32.8 372 -35 355 43.0 373 -45 5 44.1 375 -45 25 26.6 376 -45 35 47.3 377 -45 45 51.1 378 -45 55 41.0 379 -45 65 39.5 380 -45 75 32.7 381 -45 85 39.3 382 -45 95 34.7 383 -45 105 32.6 384 -45 115 46.0 385 -45 125 41.5 386 -45 135 35.9 387 -45 145 34.1 388 -45 155 31.9 389 -45 165 36.8 390 -45 175 38.9 391 -45 185 40.8 392 -45 195 37.3 393 -45 205 39.5 394 -45 215 36.9 395 -45 225 37.4 396 -45 235 39.4 397 -45 245 45.4 399 -45 265 19.9 400 -45 275 57.3 401 -45 285 37.0 402 -45 295 31.2 403 -45 305 32.3 404 -45 315 34.4 405 -45 325 41.2 407 -45 345 46.4 408 -45 355 39.2 409 -55 10 33.7 411 -55 50 39.3 412 -55 70 45.1 414 -55 110 34.8 416 -55 150 41.2 417 -55 170 58.7 419 -55 210 44.8 420 -55 230 54.8 421 -55 250 47.1 422 -55 270 35.5 423 -55 290 38.9 424 -55 310 46.3 425 -55 330 40.2 426 -55 350 35.5 432 -65 110 37.8 433 -65 130 39.1 442 -65 310 42.7