Stratocumulus Frequency of Occurrence (%) July (1954 - 1997) Night, Ship Observations Only Global Average: 31.3 Zonal Averages 15 zones Lat.N Average 85 20.1 75 28.8 65 36.3 55 35.3 45 32.5 35 31.7 25 25.0 15 24.5 5 24.0 -5 22.9 -15 30.3 -25 34.2 -35 33.4 -45 40.1 -55 49.2 Grid Box Averages 321 filled boxes Box # Lat.N Lon.E Average 1 85 60 20.1 2 85 180 22.8 3 85 300 16.4 4 75 20 40.4 5 75 60 38.1 6 75 100 29.8 7 75 140 18.7 8 75 180 21.2 9 75 220 23.4 10 75 260 41.0 11 75 300 19.1 12 75 340 29.6 13 65 10 40.7 14 65 30 43.0 15 65 50 38.1 16 65 70 25.2 20 65 150 23.4 21 65 170 39.2 22 65 190 34.9 23 65 210 40.1 25 65 250 26.9 26 65 270 33.5 27 65 290 34.2 28 65 310 25.4 29 65 330 37.4 30 65 350 41.2 31 55 10 29.6 32 55 30 28.2 37 55 130 32.4 38 55 150 26.9 39 55 170 30.3 40 55 190 33.2 41 55 210 40.2 42 55 230 41.7 44 55 270 25.5 45 55 290 33.9 46 55 310 31.9 47 55 330 41.9 48 55 350 46.5 49 45 5 11.8 50 45 15 10.2 51 45 25 10.9 52 45 35 13.6 62 45 135 28.1 63 45 145 26.8 64 45 155 26.7 65 45 165 24.0 66 45 175 25.5 67 45 185 28.9 68 45 195 34.2 69 45 205 39.0 70 45 215 44.3 71 45 225 51.0 72 45 235 42.1 77 45 285 18.9 78 45 295 18.8 79 45 305 22.3 80 45 315 26.2 81 45 325 38.6 82 45 335 43.3 83 45 345 46.0 84 45 355 31.8 85 35 5 12.6 86 35 15 5.2 87 35 25 4.2 88 35 35 9.2 96 35 115 26.3 97 35 125 23.2 98 35 135 22.3 99 35 145 34.5 100 35 155 37.7 101 35 165 35.4 102 35 175 31.4 103 35 185 32.7 104 35 195 36.0 105 35 205 43.9 106 35 215 51.8 107 35 225 63.5 108 35 235 45.4 109 35 245 41.9 112 35 275 15.9 113 35 285 19.4 114 35 295 21.1 115 35 305 20.3 116 35 315 15.6 117 35 325 26.5 118 35 335 39.8 119 35 345 42.4 120 35 355 17.6 124 25 35 3.0 125 25 45 1.5 126 25 55 7.8 127 25 65 30.3 129 25 85 25.9 131 25 105 17.8 132 25 115 20.4 133 25 125 18.5 134 25 135 16.1 135 25 145 16.7 136 25 155 18.4 137 25 165 17.8 138 25 175 16.2 139 25 185 15.4 140 25 195 16.5 141 25 205 27.6 142 25 215 48.1 143 25 225 62.2 144 25 235 64.8 145 25 245 35.7 146 25 255 25.7 147 25 265 13.5 148 25 275 12.0 149 25 285 14.9 150 25 295 11.8 151 25 305 11.1 152 25 315 13.1 153 25 325 27.2 154 25 335 44.7 155 25 345 29.6 160 15 35 7.4 161 15 45 12.5 162 15 55 13.8 163 15 65 26.5 164 15 75 29.4 165 15 85 24.3 166 15 95 22.7 167 15 105 19.3 168 15 115 23.9 169 15 125 22.5 170 15 135 21.1 171 15 145 18.7 172 15 155 16.1 173 15 165 15.1 174 15 175 16.8 175 15 185 15.5 176 15 195 19.3 177 15 205 25.7 178 15 215 37.0 179 15 225 43.8 180 15 235 49.3 181 15 245 29.9 182 15 255 23.9 183 15 265 24.2 184 15 275 20.7 185 15 285 19.3 186 15 295 15.1 187 15 305 16.7 188 15 315 25.4 189 15 325 33.4 190 15 335 36.5 191 15 345 24.6 193 5 5 34.1 197 5 45 16.5 198 5 55 13.7 199 5 65 15.8 200 5 75 20.9 201 5 85 23.0 202 5 95 22.0 203 5 105 22.4 204 5 115 23.5 205 5 125 22.5 206 5 135 15.3 207 5 145 22.3 208 5 155 22.7 209 5 165 26.3 210 5 175 23.1 211 5 185 12.1 212 5 195 17.9 213 5 205 21.5 214 5 215 24.2 215 5 225 25.3 216 5 235 34.8 217 5 245 35.6 218 5 255 34.3 219 5 265 40.4 220 5 275 32.4 221 5 285 33.8 223 5 305 19.8 224 5 315 19.5 225 5 325 15.3 226 5 335 22.7 227 5 345 28.8 228 5 355 33.4 229 -5 5 41.6 230 -5 15 31.1 233 -5 45 16.9 234 -5 55 22.4 235 -5 65 21.3 236 -5 75 23.9 237 -5 85 22.8 238 -5 95 23.4 239 -5 105 16.3 240 -5 115 13.7 241 -5 125 17.5 242 -5 135 19.1 243 -5 145 20.8 244 -5 155 27.5 245 -5 165 16.3 246 -5 175 10.9 247 -5 185 12.9 248 -5 195 15.6 249 -5 205 13.9 250 -5 215 13.8 251 -5 225 13.4 252 -5 235 10.3 253 -5 245 17.8 254 -5 255 34.7 255 -5 265 57.0 256 -5 275 58.0 260 -5 315 14.1 261 -5 325 17.4 262 -5 335 18.7 263 -5 345 19.3 264 -5 355 38.7 265 -15 5 67.5 266 -15 15 41.2 268 -15 35 10.8 269 -15 45 13.4 270 -15 55 17.6 271 -15 65 22.9 272 -15 75 23.1 273 -15 85 31.6 274 -15 95 30.6 275 -15 105 28.4 276 -15 115 11.6 277 -15 125 5.7 278 -15 135 19.8 279 -15 145 23.6 280 -15 155 28.8 281 -15 165 31.2 282 -15 175 30.9 283 -15 185 27.6 284 -15 195 18.9 285 -15 205 19.3 286 -15 215 17.6 287 -15 225 13.6 288 -15 235 21.9 289 -15 245 24.2 290 -15 255 36.7 291 -15 265 55.3 292 -15 275 74.1 293 -15 285 69.1 297 -15 325 19.0 298 -15 335 23.4 299 -15 345 29.1 300 -15 355 62.5 301 -25 5 55.8 302 -25 15 25.5 304 -25 35 15.0 305 -25 45 20.6 306 -25 55 25.1 307 -25 65 32.8 308 -25 75 40.0 309 -25 85 44.5 310 -25 95 43.4 311 -25 105 33.6 312 -25 115 20.2 316 -25 155 17.8 317 -25 165 27.2 318 -25 175 29.6 319 -25 185 36.2 320 -25 195 37.0 321 -25 205 34.5 322 -25 215 38.2 323 -25 225 31.7 324 -25 235 31.9 325 -25 245 24.3 328 -25 275 51.3 329 -25 285 52.5 332 -25 315 23.1 333 -25 325 25.9 334 -25 335 30.3 335 -25 345 35.5 336 -25 355 45.1 337 -35 5 47.4 338 -35 15 28.1 339 -35 25 15.3 340 -35 35 19.5 341 -35 45 33.4 342 -35 55 33.1 343 -35 65 36.3 344 -35 75 43.7 345 -35 85 40.8 346 -35 95 39.5 347 -35 105 31.7 348 -35 115 28.7 349 -35 125 32.0 350 -35 135 32.6 351 -35 145 32.9 352 -35 155 24.1 353 -35 165 28.8 354 -35 175 26.2 355 -35 185 31.4 356 -35 195 29.1 357 -35 205 30.6 358 -35 215 33.6 359 -35 225 34.1 364 -35 275 51.4 365 -35 285 42.4 367 -35 305 28.2 368 -35 315 29.5 369 -35 325 40.3 370 -35 335 28.4 371 -35 345 31.8 372 -35 355 38.5 387 -45 145 33.4 388 -45 155 38.8 389 -45 165 33.0 390 -45 175 35.4 391 -45 185 45.5 393 -45 205 41.9 397 -45 245 58.6 400 -45 275 48.0 401 -45 285 35.1 402 -45 295 39.0 403 -45 305 34.7 404 -45 315 32.4 417 -55 170 75.8 423 -55 290 40.2 424 -55 310 42.4 425 -55 330 36.7