Altostratus Frequency of Occurrence - Phase of Annual Cycle (Month of Maximum) 1971 - 1996, Land Areas Only Grid Box Averages 497 boxes filled with min 1 SNs. 0 boxes filled with min 1 SNs. Box # Lat.N Lon.E Phase N.SNs. 8 82.5 -100.0 12.4 9 8.250000e+001 -60.0 1.1 11.0 7.750000e+001 10 12.5 12.0 77.5 30 1.040000e+000 14.0 77.5 70.0 1.260000e+000 15 77.5 90.0 1.1 17 7.750000e+001 130.0 0.7 23.0 7.750000e+001 -110 0.5 25.0 77.5 -70 1.090000e+000 28.0 77.5 -10.0 9.900000e-001 31 72.5 50.0 1.8 32 7.250000e+001 70.0 1.5 33.0 7.250000e+001 90 1.3 36.0 72.5 150 1.243000e+001 37.0 72.5 170.0 1.229000e+001 39 72.5 -150.0 0.9 40 7.250000e+001 -130.0 1.0 42.0 7.250000e+001 -90 1.2 43.0 72.5 -70 2.180000e+000 45.0 72.5 -30.0 1.247000e+001 48 67.5 15.0 0.9 49 6.750000e+001 25.0 0.6 50.0 6.750000e+001 35 1.3 51.0 67.5 45 1.370000e+000 52.0 67.5 55.0 1.090000e+000 53 67.5 65.0 0.9 54 6.750000e+001 75.0 1.1 55.0 6.750000e+001 85 0.9 56.0 67.5 95 1.248000e+001 60.0 67.5 135.0 7.500000e+000 61 67.5 145.0 11.9 62 6.750000e+001 155.0 11.5 63.0 6.750000e+001 165 11.9 64.0 67.5 175 1.191000e+001 66.0 67.5 -165.0 1.233000e+001 68 67.5 -145.0 12.0 69 6.750000e+001 -135.0 1.3 70.0 6.750000e+001 -125 0.9 71.0 67.5 -115 1.340000e+000 72.0 67.5 -105.0 1.010000e+000 73 67.5 -95.0 1.6 74 6.750000e+001 -85.0 1.5 75.0 6.750000e+001 -75 1.1 76.0 67.5 -65 1.700000e+000 77.0 67.5 -55.0 1.340000e+000 79 67.5 -35.0 1.2 80 6.750000e+001 -25.0 0.9 81.0 6.750000e+001 -15 1.8 85.0 62.5 25 9.200000e-001 86.0 62.5 35.0 1.070000e+000 87 62.5 45.0 1.0 88 6.250000e+001 55.0 0.9 89.0 6.250000e+001 65 0.7 90.0 62.5 75 6.200000e-001 91.0 62.5 85.0 7.300000e-001 92 62.5 95.0 0.6 93 6.250000e+001 105.0 12.4 98.0 6.250000e+001 155 12.0 99.0 62.5 165 8.900000e-001 100.0 62.5 175.0 8.000000e-001 101 62.5 -175.0 1.7 102 6.250000e+001 -165.0 12.5 104.0 6.250000e+001 -145 0.8 105.0 62.5 -135 1.210000e+000 106.0 62.5 -125.0 1.450000e+000 107 62.5 -115.0 1.6 108 6.250000e+001 -105.0 12.1 109.0 6.250000e+001 -95 1.6 110.0 62.5 -85 2.060000e+000 111.0 62.5 -75.0 6.350000e+000 112 62.5 -65.0 1.6 113 6.250000e+001 -55.0 1.5 114.0 6.250000e+001 -45 1.4 116.0 62.5 -25 1.230000e+000 117.0 62.5 -15.0 7.300000e-001 118 62.5 -5.0 1.3 121 5.750000e+001 25.0 1.2 122.0 5.750000e+001 35 1.0 123.0 57.5 45 8.000000e-001 124.0 57.5 55.0 6.500000e-001 125 57.5 65.0 0.6 126 5.750000e+001 75.0 0.7 127.0 5.750000e+001 85 0.8 128.0 57.5 95 5.700000e-001 129.0 57.5 105.0 6.000000e-001 130 57.5 115.0 12.3 133 5.750000e+001 145.0 1.6 137.0 5.750000e+001 -175 0.7 138.0 57.5 -165 1.179000e+001 141.0 57.5 -135.0 1.410000e+000 142 57.5 -125.0 1.4 143 5.750000e+001 -115.0 1.5 144.0 5.750000e+001 -105 1.5 147.0 57.5 -75 1.280000e+000 148.0 57.5 -65.0 1.070000e+000 154 57.5 -5.0 1.2 156 5.250000e+001 15.0 1.6 157.0 5.250000e+001 25 1.5 158.0 52.5 35 1.220000e+000 159.0 52.5 45.0 9.000000e-001 160 52.5 55.0 0.9 161 5.250000e+001 65.0 0.8 162.0 5.250000e+001 75 0.8 163.0 52.5 85 9.500000e-001 164.0 52.5 95.0 8.700000e-001 165 52.5 105.0 1.3 169 5.250000e+001 145.0 2.3 177.0 5.250000e+001 -135 1.7 178.0 52.5 -125 1.680000e+000 179.0 52.5 -115.0 1.350000e+000 180 52.5 -105.0 1.2 181 5.250000e+001 -95.0 1.3 182.0 5.250000e+001 -85 1.6 183.0 52.5 -75 9.700000e-001 184.0 52.5 -65.0 1.530000e+000 189 52.5 -15.0 0.6 190 5.250000e+001 -5.0 1.4 192.0 4.750000e+001 7.500000e+000 1.8 193.0 47.5 1.250000e+001 2.130000e+000 194.0 47.5 17.5 1.960000e+000 195 47.5 22.5 1.4 196 4.750000e+001 27.5 1.5 197.0 4.750000e+001 3.250000e+001 1.5 198.0 47.5 3.750000e+001 1.340000e+000 199.0 47.5 42.5 1.300000e+000 200 47.5 47.5 0.9 201 4.750000e+001 52.5 0.9 202.0 4.750000e+001 5.750000e+001 1.0 203.0 47.5 6.250000e+001 9.500000e-001 204.0 47.5 67.5 9.300000e-001 205 47.5 72.5 1.1 206 4.750000e+001 77.5 0.9 207.0 4.750000e+001 8.250000e+001 1.1 208.0 47.5 8.750000e+001 1.100000e+000 209.0 47.5 92.5 1.460000e+000 210 47.5 97.5 1.1 211 4.750000e+001 102.5 2.1 212.0 4.750000e+001 1.075000e+002 1.5 213.0 47.5 1.125000e+002 2.320000e+000 217.0 47.5 132.5 2.330000e+000 218 47.5 137.5 3.2 219 4.750000e+001 142.5 2.4 220.0 4.750000e+001 1.475000e+002 3.7 238.0 47.5 -1.225000e+002 1.370000e+000 239.0 47.5 -117.5 1.320000e+000 240 47.5 -112.5 1.3 241 4.750000e+001 -107.5 1.1 242.0 4.750000e+001 -1.025000e+002 1.1 245.0 47.5 -8.750000e+001 1.170000e+000 246.0 47.5 -82.5 1.570000e+000 247 47.5 -77.5 1.3 248 4.750000e+001 -72.5 1.5 249.0 4.750000e+001 -6.750000e+001 1.4 250.0 47.5 -6.250000e+001 1.280000e+000 251.0 47.5 -57.5 1.440000e+000 252 47.5 -52.5 1.4 261 4.750000e+001 -7.5 1.6 262.0 4.750000e+001 -2.500000e+000 1.4 264.0 42.5 7.500000e+000 2.030000e+000 265.0 42.5 12.5 1.780000e+000 266 42.5 17.5 1.8 267 4.250000e+001 22.5 1.6 268.0 4.250000e+001 2.750000e+001 1.5 269.0 42.5 3.250000e+001 1.490000e+000 270.0 42.5 37.5 1.780000e+000 271 42.5 42.5 1.9 272 4.250000e+001 47.5 1.9 273.0 4.250000e+001 5.250000e+001 1.3 274.0 42.5 5.750000e+001 1.380000e+000 275.0 42.5 62.5 1.210000e+000 276 42.5 67.5 1.3 277 4.250000e+001 72.5 1.4 278.0 4.250000e+001 7.750000e+001 2.0 279.0 42.5 8.250000e+001 1.990000e+000 280.0 42.5 87.5 2 282 42.5 97.5 3.9 283 4.250000e+001 102.5 4.9 284.0 4.250000e+001 1.075000e+002 4.6 287.0 42.5 1.225000e+002 4.570000e+000 288.0 42.5 127.5 4.440000e+000 289 42.5 132.5 3.9 290 4.250000e+001 137.5 4.0 291.0 4.250000e+001 1.425000e+002 2.5 292.0 42.5 1.475000e+002 2.190000e+000 310.0 42.5 -122.5 1.400000e+000 311 42.5 -117.5 1.4 312 4.250000e+001 -112.5 1.5 313.0 4.250000e+001 -1.075000e+002 1.6 314.0 42.5 -1.025000e+002 1.330000e+000 315.0 42.5 -97.5 1.190000e+000 316 42.5 -92.5 1.0 318 4.250000e+001 -82.5 1.3 319.0 4.250000e+001 -7.750000e+001 1.4 320.0 42.5 -7.250000e+001 1.640000e+000 321.0 42.5 -67.5 1.780000e+000 322 42.5 -62.5 1.2 333 4.250000e+001 -7.5 2.4 334.0 4.250000e+001 -2.500000e+000 2.0 337.0 37.5 1.250000e+001 1.710000e+000 338.0 37.5 17.5 1.630000e+000 339 37.5 22.5 1.3 340 3.750000e+001 27.5 1.6 341.0 3.750000e+001 3.250000e+001 1.5 342.0 37.5 3.750000e+001 1.430000e+000 343.0 37.5 42.5 1.490000e+000 344 37.5 47.5 1.9 345 3.750000e+001 52.5 2.2 346.0 3.750000e+001 5.750000e+001 1.7 347.0 37.5 6.250000e+001 1.430000e+000 348.0 37.5 67.5 1.670000e+000 349 37.5 72.5 1.9 350 3.750000e+001 77.5 2.8 351.0 3.750000e+001 8.250000e+001 4.5 352.0 37.5 8.750000e+001 3.860000e+000 353.0 37.5 92.5 4.220000e+000 354 37.5 97.5 4.3 355 3.750000e+001 102.5 3.9 356.0 3.750000e+001 1.075000e+002 3.7 360.0 37.5 1.275000e+002 6.120000e+000 361.0 37.5 132.5 4.190000e+000 362 37.5 137.5 4.3 363 3.750000e+001 142.5 4.4 382.0 3.750000e+001 -1.225000e+002 1.5 383.0 37.5 -1.175000e+002 1.460000e+000 384.0 37.5 -112.5 1.430000e+000 385 37.5 -107.5 1.6 388 3.750000e+001 -92.5 1.7 389.0 3.750000e+001 -8.750000e+001 1.8 390.0 37.5 -8.250000e+001 1.910000e+000 406.0 37.5 -2.5 2.030000e+000 410 32.5 17.5 3.0 411 3.250000e+001 22.5 2.1 412.0 3.250000e+001 2.750000e+001 1.8 413.0 32.5 3.250000e+001 1.860000e+000 414.0 32.5 37.5 1.930000e+000 415 32.5 42.5 2.2 416 3.250000e+001 47.5 1.8 417.0 3.250000e+001 5.250000e+001 2.0 418.0 32.5 5.750000e+001 1.880000e+000 419.0 32.5 62.5 1.880000e+000 420 32.5 67.5 2.4 422 3.250000e+001 77.5 6.9 426.0 3.250000e+001 9.750000e+001 3.0 429.0 32.5 1.125000e+002 2.100000e+000 432.0 32.5 127.5 5.440000e+000 433 32.5 132.5 3.9 434 3.250000e+001 137.5 4.1 455.0 3.250000e+001 -1.175000e+002 1.4 456.0 32.5 -1.125000e+002 1.090000e+000 466.0 32.5 -62.5 1.770000e+000 482 27.5 17.5 3.0 483 2.750000e+001 22.5 2.5 486.0 2.750000e+001 3.750000e+001 2.0 487.0 27.5 4.250000e+001 1.970000e+000 488.0 27.5 47.5 2.160000e+000 489 27.5 52.5 2.2 490 2.750000e+001 57.5 2.2 491.0 2.750000e+001 6.250000e+001 2.0 493.0 27.5 7.250000e+001 7.150000e+000 494.0 27.5 77.5 7.260000e+000 495 27.5 82.5 7.5 496 2.750000e+001 87.5 7.0 497.0 2.750000e+001 9.250000e+001 6.4 498.0 27.5 9.750000e+001 6.370000e+000 504.0 27.5 127.5 2.920000e+000 515 27.5 -177.5 12.0 530 2.750000e+001 -102.5 2.0 560.0 2.250000e+001 4.750000e+001 2.5 564.0 22.5 6.750000e+001 7.460000e+000 565.0 22.5 72.5 7.440000e+000 566 22.5 77.5 7.5 567 2.250000e+001 82.5 7.5 568.0 2.250000e+001 8.750000e+001 7.1 569.0 22.5 9.250000e+001 6.780000e+000 570.0 22.5 97.5 7.700000e+000 571 22.5 102.5 7.5 601 2.250000e+001 -107.5 7.9 603.0 2.250000e+001 -9.750000e+001 2.0 605.0 22.5 -8.750000e+001 7.670000e+000 607.0 22.5 -77.5 7.140000e+000 637 17.5 72.5 7.5 638 1.750000e+001 77.5 7.5 639.0 1.750000e+001 8.250000e+001 7.7 641.0 17.5 9.250000e+001 7.300000e+000 642.0 17.5 97.5 7.540000e+000 643 17.5 102.5 7.1 646 1.750000e+001 117.5 7.7 647.0 1.750000e+001 1.225000e+002 8.1 656.0 17.5 1.675000e+002 8.260000e+000 674.0 17.5 -102.5 7.730000e+000 675 17.5 -97.5 7.5 676 1.750000e+001 -92.5 7.7 677.0 1.750000e+001 -8.750000e+001 8.5 678.0 17.5 -8.250000e+001 9.190000e+000 680.0 17.5 -72.5 7.110000e+000 681 17.5 -67.5 8.1 698 1.250000e+001 17.5 7.4 699.0 1.250000e+001 2.250000e+001 7.5 702.0 12.5 3.750000e+001 7.100000e+000 709.0 12.5 72.5 7.270000e+000 710 12.5 77.5 8.1 711 1.250000e+001 82.5 8.9 713.0 1.250000e+001 9.250000e+001 7.4 714.0 12.5 9.750000e+001 7.480000e+000 715.0 12.5 102.5 7.260000e+000 716 12.5 107.5 8.6 719 1.250000e+001 122.5 9.4 723.0 1.250000e+001 1.425000e+002 8.2 748.0 12.5 -9.250000e+001 7.320000e+000 749.0 12.5 -87.5 7.700000e+000 750 12.5 -82.5 7.9 751 1.250000e+001 -77.5 7.7 752.0 1.250000e+001 -7.250000e+001 8.0 753.0 12.5 -6.750000e+001 7.450000e+000 754.0 12.5 -62.5 8.070000e+000 762 12.5 -22.5 11.6 764 1.250000e+001 -12.5 7.7 765.0 1.250000e+001 -7.500000e+000 7.4 766.0 12.5 -2.500000e+000 7.210000e+000 768.0 7.5 7.5 7.260000e+000 769 7.5 12.5 6.8 770 7.500000e+000 17.5 7.6 771.0 7.500000e+000 2.250000e+001 6.8 772.0 7.5 2.750000e+001 7.520000e+000 774.0 7.5 37.5 6.720000e+000 781 7.5 72.5 7.3 782 7.500000e+000 77.5 7.7 785.0 7.500000e+000 9.250000e+001 7.6 786.0 7.5 9.750000e+001 8.190000e+000 787.0 7.5 102.5 8.750000e+000 788 7.5 107.5 8.0 789 7.500000e+000 112.5 9.3 790.0 7.500000e+000 1.175000e+002 8.1 791.0 7.5 1.225000e+002 9.070000e+000 793.0 7.5 132.5 7.980000e+000 794 7.5 137.5 8.8 796 7.500000e+000 147.5 7.0 797.0 7.500000e+000 1.525000e+002 7.9 799.0 7.5 1.625000e+002 3.910000e+000 800.0 7.5 167.5 8.300000e+000 801 7.5 172.5 8.3 822 7.500000e+000 -82.5 7.6 823.0 7.500000e+000 -7.750000e+001 7.8 824.0 7.5 -7.250000e+001 7.760000e+000 825.0 7.5 -67.5 7.080000e+000 826 7.5 -62.5 7.0 836 7.500000e+000 -12.5 7.3 837.0 7.500000e+000 -7.500000e+000 6.6 838.0 7.5 -2.500000e+000 6.930000e+000 842.0 2.5 17.5 7.120000e+000 843 2.5 22.5 7.0 844 2.500000e+000 27.5 6.8 845.0 2.500000e+000 3.250000e+001 4.9 860.0 2.5 1.075000e+002 1.146000e+001 862.0 2.5 117.5 1.061000e+001 898 2.5 -62.5 5.9 909 2.500000e+000 -7.5 5.7 910.0 2.500000e+000 -2.500000e+000 5.8 912.0 -2.5 7.500000e+000 1.810000e+000 913.0 -2.5 12.5 1.490000e+000 914 -2.5 17.5 1.5 916 -2.500000e+000 27.5 12.4 919.0 -2.500000e+000 4.250000e+001 5.2 925.0 -2.5 7.250000e+001 9.210000e+000 931.0 -2.5 102.5 1.181000e+001 932 -2.5 107.5 12.4 933 -2.500000e+000 112.5 8.0 934.0 -2.500000e+000 1.175000e+002 11.4 935.0 -2.5 1.225000e+002 2.630000e+000 936.0 -2.5 127.5 6.450000e+000 939 -2.5 142.5 3.0 940 -2.500000e+000 147.5 1.3 965.0 -2.500000e+000 -8.750000e+001 9.9 968.0 -2.5 -7.250000e+001 1.770000e+000 970.0 -2.5 -62.5 1.214000e+001 971 -2.5 -57.5 2.4 972 -2.500000e+000 -52.5 2.5 973.0 -2.500000e+000 -4.750000e+001 2.6 974.0 -2.5 -4.250000e+001 3.010000e+000 975.0 -2.5 -37.5 3.430000e+000 976 -2.5 -32.5 4.0 985 -7.500000e+000 12.5 12.5 986.0 -7.500000e+000 1.750000e+001 12.3 987.0 -7.5 2.250000e+001 1.248000e+001 988.0 -7.5 27.5 1.430000e+000 989 -7.5 32.5 1.4 990 -7.500000e+000 37.5 2.9 1004.0 -7.500000e+000 1.075000e+002 1.3 1005.0 -7.5 1.125000e+002 1.480000e+000 1006.0 -7.5 117.5 1.150000e+000 1007 -7.5 122.5 1.4 1008 -7.500000e+000 127.5 1.5 1009.0 -7.500000e+000 1.325000e+002 3.1 1012.0 -7.5 1.475000e+002 1.690000e+000 1015.0 -7.5 162.5 1.910000e+000 1018 -7.5 177.5 1.0 1020 -7.500000e+000 -172.5 12.4 1023.0 -7.500000e+000 -1.575000e+002 2.2 1038.0 -7.5 -8.250000e+001 2.720000e+000 1039.0 -7.5 -77.5 1.350000e+000 1040 -7.5 -72.5 1.3 1041 -7.500000e+000 -67.5 12.2 1042.0 -7.500000e+000 -6.250000e+001 1.1 1043.0 -7.5 -5.750000e+001 1.060000e+000 1044.0 -7.5 -52.5 9.700000e-001 1045 -7.5 -47.5 0.9 1046 -7.500000e+000 -42.5 2.3 1047.0 -7.500000e+000 -3.750000e+001 4.5 1048.0 -7.5 -3.250000e+001 5.140000e+000 1058.0 -12.5 17.5 1.310000e+000 1059 -12.5 22.5 0.9 1060 -1.250000e+001 27.5 1.2 1062.0 -1.250000e+001 3.750000e+001 1.5 1065.0 -12.5 5.250000e+001 1.430000e+000 1076.0 -12.5 107.5 2.390000e+000 1079 -12.5 122.5 1.3 1081 -1.250000e+001 132.5 1.3 1082.0 -1.250000e+001 1.375000e+002 1.8 1083.0 -12.5 1.425000e+002 1.910000e+000 1087.0 -12.5 162.5 2.580000e+000 1088 -12.5 167.5 4.2 1091 -1.250000e+001 -177.5 1.8 1092.0 -1.250000e+001 -1.725000e+002 0.8 1093.0 -12.5 -1.675000e+002 8.500000e-001 1094.0 -12.5 -162.5 1.230000e+000 1111 -12.5 -77.5 1.2 1112 -1.250000e+001 -72.5 1.2 1113.0 -1.250000e+001 -6.750000e+001 1.1 1114.0 -12.5 -6.250000e+001 1.120000e+000 1115.0 -12.5 -57.5 1 1116 -12.5 -52.5 0.8 1117 -1.250000e+001 -47.5 0.7 1118.0 -1.250000e+001 -4.250000e+001 12.0 1119.0 -12.5 -3.750000e+001 6.970000e+000 1130.0 -17.5 17.5 8.400000e-001 1134 -17.5 37.5 1.6 1151 -1.750000e+001 122.5 1.6 1152.0 -1.750000e+001 1.275000e+002 1.4 1153.0 -17.5 1.325000e+002 1.450000e+000 1154.0 -17.5 137.5 1.750000e+000 1155 -17.5 142.5 1.7 1156 -1.750000e+001 147.5 2.3 1165.0 -1.750000e+001 -1.675000e+002 1.1 1183.0 -17.5 -7.750000e+001 1.150000e+000 1184.0 -17.5 -72.5 1.250000e+000 1185 -17.5 -67.5 0.7 1186 -1.750000e+001 -62.5 0.9 1187.0 -1.750000e+001 -5.750000e+001 0.9 1188.0 -17.5 -5.250000e+001 6.200000e-001 1189.0 -17.5 -47.5 5.100000e-001 1190 -17.5 -42.5 12.1 1191 -1.750000e+001 -37.5 10.9 1204.0 -2.250000e+001 2.750000e+001 0.6 1226.0 -22.5 1.375000e+002 1.210000e+000 1227.0 -22.5 142.5 1.610000e+000 1228 -22.5 147.5 1.9 1229 -2.250000e+001 152.5 2.1 1257.0 -2.250000e+001 -6.750000e+001 1.2 1261.0 -22.5 -4.750000e+001 1.203000e+001 1262.0 -22.5 -42.5 1.080000e+001 1277 -27.5 32.5 11.5 1293 -2.750000e+001 112.5 6.4 1295.0 -2.750000e+001 1.225000e+002 3.7 1321.0 -27.5 -1.075000e+002 7.750000e+000 1328.0 -27.5 -72.5 6.190000e+000 1329 -27.5 -67.5 1.5 1330 -2.750000e+001 -62.5 0.5 1333.0 -2.750000e+001 -4.750000e+001 9.7 1349.0 -32.5 3.250000e+001 12 1377.0 -32.5 172.5 8.110000e+000 1399 -32.5 -77.5 6.7 1400 -3.250000e+001 -72.5 6.9 1443.0 -3.750000e+001 1.425000e+002 7.4 1472.0 -37.5 -7.250000e+001 6.770000e+000 1473.0 -37.5 -67.5 6.960000e+000 1474 -37.5 -62.5 8.2 1516 -4.250000e+001 147.5 8.4 1544.0 -4.250000e+001 -7.250000e+001 6.8 1545.0 -42.5 -6.750000e+001 6.480000e+000 1546.0 -42.5 -62.5 7.010000e+000 1616 -47.5 -72.5 6.6 1617 -4.750000e+001 -67.5 6.5 1646.0 -5.250000e+001 155 8.2 1659.0 -52.5 -75 6.240000e+000 1661.0 -52.5 -55.0 6.720000e+000 1732 -62.5 -65.0 9.6 1742 -6.750000e+001 35.0 6.3 1743.0 -6.750000e+001 45 7.0 1745.0 -67.5 65 7.940000e+000 1746.0 -67.5 75.0 6.230000e+000 1748 -67.5 95.0 7.4 1750 -6.750000e+001 115.0 7.1 1754.0 -6.750000e+001 155 6.2 1775.0 -72.5 10 7.680000e+000 1798.0 -77.5 110.0 6.700000e+000 1801 -77.5 170.0 7.0 1809 -7.750000e+001 -30.0 7.0