Stratocumulus Frequency of Occurrence (%) August (1954 - 1997) Night, Ship Observations Only Global Average: 31.4 Zonal Averages 15 zones Lat.N Average 85 26.9 75 34.5 65 37.8 55 37.0 45 34.6 35 27.5 25 23.2 15 22.9 5 24.8 -5 24.7 -15 32.1 -25 35.7 -35 35.5 -45 39.1 -55 44.7 Grid Box Averages 319 filled boxes Box # Lat.N Lon.E Average 1 85 60 24.6 2 85 180 30.6 3 85 300 24.6 4 75 20 40.3 5 75 60 42.4 6 75 100 34.6 7 75 140 27.6 8 75 180 27.3 9 75 220 33.5 10 75 260 45.5 11 75 300 33.1 12 75 340 30.1 13 65 10 38.9 14 65 30 43.9 15 65 50 44.2 16 65 70 47.2 21 65 170 45.1 22 65 190 39.2 23 65 210 36.9 24 65 230 34.0 25 65 250 39.5 26 65 270 40.5 27 65 290 34.1 28 65 310 28.3 29 65 330 35.6 30 65 350 40.1 31 55 10 28.3 32 55 30 27.4 37 55 130 36.2 38 55 150 31.6 39 55 170 34.8 40 55 190 34.4 41 55 210 40.1 42 55 230 36.2 44 55 270 36.8 45 55 290 29.4 46 55 310 35.0 47 55 330 44.2 48 55 350 44.6 49 45 5 13.1 50 45 15 11.6 51 45 25 10.3 52 45 35 12.2 54 45 55 9.0 62 45 135 29.6 63 45 145 30.2 64 45 155 32.8 65 45 165 32.6 66 45 175 34.5 67 45 185 34.6 68 45 195 36.8 69 45 205 39.5 70 45 215 44.9 71 45 225 50.8 72 45 235 37.0 77 45 285 18.6 78 45 295 19.5 79 45 305 25.0 80 45 315 32.4 81 45 325 35.8 82 45 335 40.9 83 45 345 43.3 84 45 355 31.4 85 35 5 14.4 86 35 15 7.8 87 35 25 3.8 88 35 35 10.7 97 35 125 21.1 98 35 135 19.0 99 35 145 28.8 100 35 155 32.4 101 35 165 29.9 102 35 175 29.4 103 35 185 27.8 104 35 195 30.0 105 35 205 37.1 106 35 215 42.5 107 35 225 56.7 108 35 235 42.8 109 35 245 42.0 112 35 275 14.0 113 35 285 19.1 114 35 295 19.9 115 35 305 15.7 116 35 315 13.1 117 35 325 19.5 118 35 335 30.6 119 35 345 38.0 120 35 355 17.6 124 25 35 3.4 125 25 45 0.0 126 25 55 7.9 127 25 65 37.8 129 25 85 36.0 132 25 115 21.4 133 25 125 19.6 134 25 135 16.0 135 25 145 19.3 136 25 155 15.4 137 25 165 16.0 138 25 175 14.8 139 25 185 13.4 140 25 195 16.4 141 25 205 25.1 142 25 215 40.0 143 25 225 55.6 144 25 235 59.5 145 25 245 34.3 146 25 255 19.6 147 25 265 13.3 148 25 275 12.3 149 25 285 15.0 150 25 295 11.9 151 25 305 10.3 152 25 315 15.2 153 25 325 21.8 154 25 335 36.2 155 25 345 27.1 160 15 35 11.4 161 15 45 13.8 162 15 55 14.0 163 15 65 29.1 164 15 75 27.4 165 15 85 25.2 166 15 95 21.6 167 15 105 21.0 168 15 115 24.8 169 15 125 26.2 170 15 135 23.5 171 15 145 23.4 172 15 155 20.0 173 15 165 12.4 174 15 175 15.2 175 15 185 13.4 176 15 195 15.9 177 15 205 24.6 178 15 215 30.5 179 15 225 38.3 180 15 235 37.8 181 15 245 24.0 182 15 255 23.6 183 15 265 24.1 184 15 275 18.5 185 15 285 18.5 186 15 295 13.4 187 15 305 13.9 188 15 315 21.3 189 15 325 30.4 190 15 335 31.8 191 15 345 23.1 193 5 5 35.7 197 5 45 16.1 198 5 55 13.4 199 5 65 14.0 200 5 75 17.2 201 5 85 21.4 202 5 95 24.0 203 5 105 24.0 204 5 115 22.4 205 5 125 25.8 206 5 135 21.9 207 5 145 25.0 208 5 155 24.5 209 5 165 20.4 210 5 175 14.4 211 5 185 18.9 212 5 195 18.6 213 5 205 25.8 214 5 215 28.9 215 5 225 31.2 216 5 235 24.7 217 5 245 33.6 218 5 255 41.1 219 5 265 42.0 220 5 275 33.5 221 5 285 35.0 223 5 305 16.7 224 5 315 18.8 225 5 325 18.1 226 5 335 23.2 227 5 345 32.5 228 5 355 41.0 229 -5 5 51.0 230 -5 15 49.1 233 -5 45 16.4 234 -5 55 20.0 235 -5 65 21.5 236 -5 75 18.9 237 -5 85 22.5 238 -5 95 20.9 239 -5 105 20.9 240 -5 115 12.8 241 -5 125 14.3 242 -5 135 19.5 243 -5 145 20.5 244 -5 155 26.7 245 -5 165 19.9 246 -5 175 13.9 247 -5 185 14.8 248 -5 195 17.7 249 -5 205 15.2 250 -5 215 13.6 251 -5 225 12.0 252 -5 235 16.0 253 -5 245 22.1 254 -5 255 43.3 255 -5 265 59.5 256 -5 275 59.9 260 -5 315 10.1 261 -5 325 14.9 262 -5 335 15.9 263 -5 345 28.7 264 -5 355 49.4 265 -15 5 73.7 266 -15 15 42.0 268 -15 35 9.6 269 -15 45 10.9 270 -15 55 20.9 271 -15 65 25.3 272 -15 75 30.1 273 -15 85 32.3 274 -15 95 29.8 275 -15 105 24.4 276 -15 115 11.1 277 -15 125 2.7 278 -15 135 13.8 279 -15 145 19.6 280 -15 155 26.6 281 -15 165 26.4 282 -15 175 32.2 283 -15 185 26.1 284 -15 195 27.8 285 -15 205 25.3 286 -15 215 20.3 287 -15 225 18.7 288 -15 235 20.8 289 -15 245 29.4 290 -15 255 43.8 291 -15 265 50.7 292 -15 275 72.7 293 -15 285 62.4 297 -15 325 16.8 298 -15 335 30.5 299 -15 345 38.7 300 -15 355 71.5 301 -25 5 59.4 302 -25 15 29.4 304 -25 35 15.2 305 -25 45 24.1 306 -25 55 25.5 307 -25 65 36.0 308 -25 75 34.9 309 -25 85 42.7 310 -25 95 42.9 311 -25 105 33.8 312 -25 115 19.1 316 -25 155 13.9 317 -25 165 26.8 318 -25 175 33.8 319 -25 185 33.5 320 -25 195 29.2 321 -25 205 37.5 322 -25 215 40.0 323 -25 225 36.0 324 -25 235 32.1 325 -25 245 27.7 328 -25 275 61.5 329 -25 285 57.5 332 -25 315 23.1 333 -25 325 26.5 334 -25 335 33.3 335 -25 345 42.6 336 -25 355 50.4 337 -35 5 47.1 338 -35 15 28.0 339 -35 25 19.3 340 -35 35 23.9 341 -35 45 38.1 342 -35 55 37.3 343 -35 65 46.3 344 -35 75 48.3 345 -35 85 45.0 346 -35 95 46.1 347 -35 105 45.6 348 -35 115 29.8 349 -35 125 28.8 350 -35 135 34.4 351 -35 145 33.5 352 -35 155 22.4 353 -35 165 28.1 354 -35 175 30.1 355 -35 185 32.6 356 -35 195 27.5 357 -35 205 32.0 358 -35 215 33.7 359 -35 225 37.4 364 -35 275 46.4 365 -35 285 43.8 367 -35 305 20.0 368 -35 315 31.2 369 -35 325 42.0 370 -35 335 33.7 371 -35 345 26.2 372 -35 355 42.9 387 -45 145 33.7 388 -45 155 30.4 389 -45 165 25.9 390 -45 175 39.1 391 -45 185 44.3 392 -45 195 51.1 400 -45 275 52.8 401 -45 285 50.2 402 -45 295 33.6 403 -45 305 36.0 404 -45 315 33.7 417 -55 170 59.2 423 -55 290 38.3 424 -55 310 46.5 425 -55 330 33.8