Stratocumulus Frequency of Occurrence (%) October (1954 - 1997) Night, Ship Observations Only Global Average: 32.6 Zonal Averages 16 zones Lat.N Average 85 35.2 75 36.1 65 41.9 55 39.7 45 37.0 35 31.7 25 23.4 15 19.7 5 23.2 -5 25.0 -15 31.2 -25 38.1 -35 40.5 -45 38.9 -55 44.4 -65 39.9 Grid Box Averages 330 filled boxes Box # Lat.N Lon.E Average 1 85 60 38.2 2 85 180 35.6 3 85 300 30.3 4 75 20 37.4 5 75 60 40.0 6 75 100 30.5 7 75 140 28.8 8 75 180 27.4 9 75 220 36.5 10 75 260 55.3 11 75 300 43.2 12 75 340 40.1 13 65 10 34.8 14 65 30 40.8 15 65 50 39.7 21 65 170 55.9 22 65 190 57.2 23 65 210 18.1 26 65 270 47.6 27 65 290 46.7 28 65 310 34.1 29 65 330 35.4 30 65 350 39.3 31 55 10 30.2 32 55 30 35.3 38 55 150 36.4 39 55 170 42.5 40 55 190 45.2 41 55 210 37.8 42 55 230 31.2 44 55 270 53.8 45 55 290 40.4 46 55 310 38.7 47 55 330 39.2 48 55 350 40.6 49 45 5 20.7 50 45 15 15.9 51 45 25 22.9 52 45 35 24.0 53 45 45 26.4 54 45 55 24.7 62 45 135 20.5 63 45 145 29.4 64 45 155 40.4 65 45 165 41.5 66 45 175 42.6 67 45 185 41.3 68 45 195 39.8 69 45 205 38.9 70 45 215 40.2 71 45 225 42.1 72 45 235 33.1 77 45 285 19.5 78 45 295 28.6 79 45 305 35.5 80 45 315 39.5 81 45 325 37.6 82 45 335 38.3 83 45 345 41.2 84 45 355 32.8 85 35 5 21.9 86 35 15 17.1 87 35 25 12.4 88 35 35 8.7 97 35 125 24.3 98 35 135 25.1 99 35 145 32.1 100 35 155 38.3 101 35 165 37.7 102 35 175 41.0 103 35 185 39.1 104 35 195 37.5 105 35 205 36.2 106 35 215 38.7 107 35 225 50.9 108 35 235 39.0 109 35 245 34.6 112 35 275 20.0 113 35 285 24.2 114 35 295 26.1 115 35 305 24.8 116 35 315 25.2 117 35 325 26.4 118 35 335 33.4 119 35 345 28.2 120 35 355 20.4 124 25 35 3.6 125 25 45 1.7 126 25 55 2.1 127 25 65 4.6 129 25 85 17.9 132 25 115 26.5 133 25 125 28.4 134 25 135 25.6 135 25 145 20.2 136 25 155 20.5 137 25 165 22.7 138 25 175 26.3 139 25 185 24.2 140 25 195 20.9 141 25 205 23.2 142 25 215 30.1 143 25 225 44.6 144 25 235 54.0 145 25 245 26.7 146 25 255 14.8 147 25 265 19.5 148 25 275 19.2 149 25 285 19.2 150 25 295 15.8 151 25 305 15.2 152 25 315 16.4 153 25 325 18.8 154 25 335 20.3 155 25 345 14.7 160 15 35 3.7 161 15 45 5.0 162 15 55 8.1 163 15 65 8.7 164 15 75 15.8 165 15 85 15.6 166 15 95 18.0 167 15 105 19.1 168 15 115 21.8 169 15 125 24.9 170 15 135 19.6 171 15 145 19.5 172 15 155 19.1 173 15 165 16.0 174 15 175 19.8 175 15 185 16.1 176 15 195 19.2 177 15 205 24.6 178 15 215 27.5 179 15 225 31.9 180 15 235 39.8 181 15 245 28.9 182 15 255 18.7 183 15 265 22.2 184 15 275 19.4 185 15 285 14.3 186 15 295 13.7 187 15 305 12.7 188 15 315 16.8 189 15 325 20.7 190 15 335 19.3 191 15 345 12.4 193 5 5 28.8 197 5 45 10.0 198 5 55 9.6 199 5 65 12.5 200 5 75 17.7 201 5 85 20.4 202 5 95 23.1 203 5 105 22.2 204 5 115 20.4 205 5 125 22.6 206 5 135 17.8 207 5 145 24.2 208 5 155 23.0 209 5 165 15.7 210 5 175 16.1 211 5 185 17.2 212 5 195 18.2 213 5 205 20.9 214 5 215 27.0 215 5 225 25.1 216 5 235 32.1 217 5 245 35.1 218 5 255 42.2 219 5 265 42.8 220 5 275 34.4 221 5 285 30.8 223 5 305 12.9 224 5 315 14.2 225 5 325 18.1 226 5 335 22.1 227 5 345 27.6 228 5 355 35.1 229 -5 5 56.7 230 -5 15 47.8 233 -5 45 10.5 234 -5 55 15.6 235 -5 65 19.8 236 -5 75 21.8 237 -5 85 20.1 238 -5 95 20.8 239 -5 105 20.8 240 -5 115 10.8 241 -5 125 10.7 242 -5 135 12.3 243 -5 145 18.2 244 -5 155 23.4 245 -5 165 20.6 246 -5 175 15.1 247 -5 185 10.8 248 -5 195 11.7 249 -5 205 15.4 250 -5 215 11.6 251 -5 225 11.5 252 -5 235 16.1 253 -5 245 24.7 254 -5 255 47.3 255 -5 265 61.2 256 -5 275 56.3 257 -5 285 47.7 260 -5 315 12.4 261 -5 325 12.6 262 -5 335 20.4 263 -5 345 46.2 264 -5 355 59.0 265 -15 5 73.4 266 -15 15 44.3 268 -15 35 11.1 269 -15 45 9.6 270 -15 55 22.6 271 -15 65 21.8 272 -15 75 26.8 273 -15 85 29.3 274 -15 95 28.2 275 -15 105 22.1 276 -15 115 6.8 277 -15 125 8.2 278 -15 135 7.6 279 -15 145 18.2 280 -15 155 19.4 281 -15 165 24.2 282 -15 175 28.9 283 -15 185 24.2 284 -15 195 19.7 285 -15 205 24.6 286 -15 215 25.2 287 -15 225 15.9 288 -15 235 13.3 289 -15 245 26.4 290 -15 255 45.4 291 -15 265 55.0 292 -15 275 77.0 293 -15 285 62.5 297 -15 325 18.3 298 -15 335 31.0 299 -15 345 53.2 300 -15 355 70.6 301 -25 5 63.5 302 -25 15 38.0 304 -25 35 24.5 305 -25 45 27.2 306 -25 55 25.3 307 -25 65 34.2 308 -25 75 42.1 309 -25 85 42.8 310 -25 95 51.7 311 -25 105 42.3 312 -25 115 19.6 316 -25 155 18.8 317 -25 165 33.3 318 -25 175 34.0 319 -25 185 33.5 320 -25 195 38.8 321 -25 205 35.0 322 -25 215 34.1 323 -25 225 33.9 324 -25 235 22.4 325 -25 245 24.7 326 -25 255 40.8 327 -25 265 56.0 328 -25 275 56.1 329 -25 285 61.4 332 -25 315 27.2 333 -25 325 26.9 334 -25 335 38.4 335 -25 345 40.0 336 -25 355 51.6 337 -35 5 54.5 338 -35 15 37.7 339 -35 25 31.0 340 -35 35 34.5 341 -35 45 39.2 342 -35 55 35.6 343 -35 65 47.0 344 -35 75 50.6 345 -35 85 48.8 346 -35 95 45.1 347 -35 105 48.0 348 -35 115 32.7 349 -35 125 35.1 350 -35 135 35.7 351 -35 145 29.0 352 -35 155 33.6 353 -35 165 40.3 354 -35 175 36.8 355 -35 185 38.3 356 -35 195 41.3 357 -35 205 38.5 358 -35 215 41.4 359 -35 225 30.9 363 -35 265 53.7 364 -35 275 47.4 365 -35 285 50.4 367 -35 305 25.1 368 -35 315 25.2 369 -35 325 37.0 370 -35 335 40.9 371 -35 345 41.1 372 -35 355 46.0 379 -45 65 29.0 380 -45 75 29.5 387 -45 145 30.3 388 -45 155 41.3 389 -45 165 44.5 390 -45 175 40.3 391 -45 185 45.3 392 -45 195 49.5 393 -45 205 52.8 400 -45 275 47.6 401 -45 285 41.8 402 -45 295 32.7 403 -45 305 26.1 404 -45 315 37.9 408 -45 355 32.6 416 -55 150 53.7 417 -55 170 64.7 421 -55 250 39.5 422 -55 270 37.1 423 -55 290 38.3 424 -55 310 44.1 425 -55 330 32.5 432 -65 110 33.9 433 -65 130 22.1 442 -65 310 55.4