Stratocumulus Amount-When-Present (%) March, April, May (1954 - 1997) , Ship Observations Only Global Average: 71.8 Zonal Averages 17 zones Lat.N Average 85 81.1 75 77.7 65 78.7 55 79.4 45 79.5 35 74.8 25 69.5 15 64.6 5 65.7 -5 63.3 -15 67.5 -25 69.2 -35 73.3 -45 78.1 -55 80.5 -65 81.3 -75 75.9 Grid Box Averages 394 filled boxes Box # Lat.N Lon.E Average 1 85 60 78.1 2 85 180 86.4 3 85 300 79.2 4 75 20 81.8 5 75 60 83.4 6 75 100 75.9 7 75 140 80.4 8 75 180 84.8 9 75 220 83.5 10 75 260 59.7 11 75 300 58.1 12 75 340 72.6 13 65 10 75.7 14 65 30 77.8 15 65 50 72.7 20 65 150 73.0 21 65 170 83.9 22 65 190 83.8 23 65 210 70.5 27 65 290 77.5 29 65 330 77.4 30 65 350 78.4 31 55 10 72.7 32 55 30 71.7 37 55 130 74.0 38 55 150 79.7 39 55 170 82.8 40 55 190 82.3 41 55 210 79.5 42 55 230 78.5 45 55 290 77.0 46 55 310 82.9 47 55 330 78.7 48 55 350 71.7 49 45 5 62.6 50 45 15 60.6 51 45 25 72.4 52 45 35 77.7 53 45 45 75.5 54 45 55 71.1 61 45 125 75.0 62 45 135 77.6 63 45 145 78.5 64 45 155 83.0 65 45 165 83.1 66 45 175 82.7 67 45 185 81.8 68 45 195 81.3 69 45 205 81.5 70 45 215 81.3 71 45 225 79.4 72 45 235 75.7 77 45 285 74.2 78 45 295 75.1 79 45 305 78.5 80 45 315 79.5 81 45 325 78.6 82 45 335 78.8 83 45 345 75.8 84 45 355 73.3 85 35 5 63.9 86 35 15 61.3 87 35 25 61.6 88 35 35 61.7 89 35 45 75.0 90 35 55 76.5 96 35 115 64.6 97 35 125 75.0 98 35 135 72.7 99 35 145 77.4 100 35 155 78.1 101 35 165 77.1 102 35 175 77.2 103 35 185 76.5 104 35 195 76.6 105 35 205 77.8 106 35 215 78.3 107 35 225 78.4 108 35 235 75.5 109 35 245 72.1 112 35 275 59.9 113 35 285 67.3 114 35 295 72.6 115 35 305 73.1 116 35 315 71.0 117 35 325 72.1 118 35 335 73.7 119 35 345 73.5 120 35 355 62.5 124 25 35 57.1 125 25 45 65.5 126 25 55 57.6 127 25 65 50.9 128 25 75 50.7 129 25 85 49.2 130 25 95 47.6 131 25 105 83.8 132 25 115 76.8 133 25 125 73.6 134 25 135 71.4 135 25 145 68.4 136 25 155 69.1 137 25 165 68.4 138 25 175 67.2 139 25 185 67.2 140 25 195 66.5 141 25 205 66.5 142 25 215 72.7 143 25 225 77.8 144 25 235 80.6 145 25 245 72.1 146 25 255 57.5 147 25 265 63.5 148 25 275 58.0 149 25 285 59.8 150 25 295 63.5 151 25 305 64.4 152 25 315 63.8 153 25 325 66.1 154 25 335 70.3 155 25 345 66.5 160 15 35 57.5 161 15 45 54.2 162 15 55 49.0 163 15 65 47.4 164 15 75 52.4 165 15 85 51.0 166 15 95 48.9 167 15 105 66.8 168 15 115 56.6 169 15 125 58.6 170 15 135 61.4 171 15 145 61.0 172 15 155 59.1 173 15 165 60.4 174 15 175 60.9 175 15 185 61.6 176 15 195 63.1 177 15 205 64.4 178 15 215 69.3 179 15 225 74.7 180 15 235 79.2 181 15 245 73.5 182 15 255 55.7 183 15 265 52.5 184 15 275 55.8 185 15 285 59.1 186 15 295 56.6 187 15 305 60.0 188 15 315 61.4 189 15 325 67.4 190 15 335 68.1 191 15 345 63.6 193 5 5 65.5 197 5 45 49.4 198 5 55 54.3 199 5 65 54.7 200 5 75 57.5 201 5 85 58.8 202 5 95 60.6 203 5 105 55.9 204 5 115 56.2 205 5 125 62.4 206 5 135 63.5 207 5 145 69.3 208 5 155 69.3 209 5 165 65.2 210 5 175 65.5 211 5 185 65.1 212 5 195 65.8 213 5 205 68.0 214 5 215 71.8 215 5 225 70.4 216 5 235 69.6 217 5 245 68.6 218 5 255 64.5 219 5 265 63.5 220 5 275 64.7 221 5 285 65.8 223 5 305 63.9 224 5 315 67.3 225 5 325 68.9 226 5 335 70.2 227 5 345 67.0 228 5 355 64.5 229 -5 5 67.2 230 -5 15 66.1 232 -5 35 58.9 233 -5 45 56.4 234 -5 55 58.0 235 -5 65 58.8 236 -5 75 61.5 237 -5 85 61.0 238 -5 95 63.9 239 -5 105 62.3 240 -5 115 56.3 241 -5 125 58.7 242 -5 135 62.5 243 -5 145 65.2 244 -5 155 69.8 245 -5 165 66.7 246 -5 175 59.2 247 -5 185 56.9 248 -5 195 58.9 249 -5 205 60.7 250 -5 215 61.5 251 -5 225 60.7 252 -5 235 63.5 253 -5 245 67.7 254 -5 255 66.3 255 -5 265 68.3 256 -5 275 68.1 257 -5 285 68.0 260 -5 315 62.6 261 -5 325 63.2 262 -5 335 62.4 263 -5 345 60.0 264 -5 355 65.6 265 -15 5 80.0 266 -15 15 76.1 268 -15 35 58.0 269 -15 45 57.7 270 -15 55 61.1 271 -15 65 61.1 272 -15 75 64.3 273 -15 85 63.0 274 -15 95 64.4 275 -15 105 63.1 276 -15 115 57.2 277 -15 125 54.7 278 -15 135 61.2 279 -15 145 63.4 280 -15 155 68.1 281 -15 165 66.9 282 -15 175 64.3 283 -15 185 63.9 284 -15 195 63.0 285 -15 205 61.0 286 -15 215 58.3 287 -15 225 60.1 288 -15 235 59.1 289 -15 245 62.2 290 -15 255 66.7 291 -15 265 73.4 292 -15 275 78.4 293 -15 285 76.6 297 -15 325 59.1 298 -15 335 57.9 299 -15 345 62.6 300 -15 355 74.7 301 -25 5 77.6 302 -25 15 73.0 304 -25 35 61.6 305 -25 45 62.1 306 -25 55 63.8 307 -25 65 70.6 308 -25 75 69.0 309 -25 85 69.8 310 -25 95 69.8 311 -25 105 70.2 312 -25 115 60.1 315 -25 145 64.0 316 -25 155 64.8 317 -25 165 64.9 318 -25 175 65.9 319 -25 185 65.1 320 -25 195 67.7 321 -25 205 67.7 322 -25 215 67.1 323 -25 225 66.0 324 -25 235 62.8 325 -25 245 65.4 326 -25 255 61.1 327 -25 265 70.6 328 -25 275 77.5 329 -25 285 84.1 332 -25 315 57.3 333 -25 325 61.3 334 -25 335 64.8 335 -25 345 63.9 336 -25 355 70.5 337 -35 5 74.8 338 -35 15 66.3 339 -35 25 66.0 340 -35 35 69.0 341 -35 45 69.9 342 -35 55 73.5 343 -35 65 75.5 344 -35 75 75.8 345 -35 85 77.9 346 -35 95 78.0 347 -35 105 76.7 348 -35 115 70.4 349 -35 125 75.2 350 -35 135 75.4 351 -35 145 71.3 352 -35 155 66.9 353 -35 165 71.2 354 -35 175 64.5 355 -35 185 68.2 356 -35 195 70.4 357 -35 205 73.2 358 -35 215 77.2 359 -35 225 76.5 360 -35 235 70.0 361 -35 245 75.1 362 -35 255 79.8 363 -35 265 75.2 364 -35 275 79.6 365 -35 285 77.3 366 -35 295 64.2 367 -35 305 64.3 368 -35 315 67.5 369 -35 325 70.3 370 -35 335 73.0 371 -35 345 71.6 372 -35 355 71.4 373 -45 5 78.9 374 -45 15 77.9 375 -45 25 74.4 376 -45 35 72.2 377 -45 45 74.5 378 -45 55 81.1 379 -45 65 83.1 380 -45 75 78.5 381 -45 85 81.7 382 -45 95 80.1 383 -45 105 79.2 384 -45 115 82.2 385 -45 125 80.8 386 -45 135 77.1 387 -45 145 69.9 388 -45 155 76.5 389 -45 165 80.0 390 -45 175 67.8 391 -45 185 76.4 392 -45 195 77.4 393 -45 205 80.4 394 -45 215 78.7 395 -45 225 76.8 396 -45 235 82.7 397 -45 245 83.6 398 -45 255 81.0 399 -45 265 78.1 400 -45 275 82.4 401 -45 285 80.8 402 -45 295 68.0 403 -45 305 71.9 404 -45 315 75.1 405 -45 325 77.2 406 -45 335 77.8 407 -45 345 74.3 408 -45 355 79.3 409 -55 10 82.3 410 -55 30 79.4 411 -55 50 81.1 412 -55 70 81.1 413 -55 90 82.2 414 -55 110 79.8 415 -55 130 79.0 416 -55 150 81.2 417 -55 170 81.1 418 -55 190 82.4 419 -55 210 87.7 420 -55 230 82.5 421 -55 250 81.7 422 -55 270 78.1 423 -55 290 74.1 424 -55 310 74.0 425 -55 330 77.4 426 -55 350 83.8 427 -65 10 80.0 428 -65 30 78.2 429 -65 50 74.7 430 -65 70 84.7 431 -65 90 85.4 432 -65 110 78.9 433 -65 130 80.5 434 -65 150 83.8 435 -65 170 81.5 436 -65 190 82.2 437 -65 210 87.8 438 -65 230 80.3 439 -65 250 82.4 440 -65 270 79.5 441 -65 290 73.6 442 -65 310 81.5 443 -65 330 86.5 444 -65 350 80.2 449 -75 180 80.5 450 -75 220 85.0 451 -75 260 67.9 452 -75 300 67.7 453 -75 340 64.5