Station ID: KOAK Lat: 37.71 Long: 122.23 GFS Model Run: 12Z 18APR 2026 Clouds Bases and Tops are now agl HR Valid 2m Tmp 2m Dpt 10m Dir 10m Spd TPrcp CPrcp 1000-500 500mb 850mb 500mb MSLP TCC PRS WX Low Middle High Max Min Sfc Snowfall PWAT 925mb Deg F Deg F deg kt in. in. Thk GPH Tmp Tmp mb % TEXT Clouds Clouds Clouds Tmp Tmp Vis in in Tmp 0 04/18 12Z 51 44 173 2 0.00 0.00 558 571 9.5 -15.0 1016.1 100 CLR 000OVC000 000SCT000 **** **** 15.0 0.0 0.367 13.7 3 04/18 15Z 54 44 132 1 0.00 0.00 558 571 9.7 -14.9 1016.1 100 CLR 225BKN242 271OVC317 54 50 15.0 0.0 0.378 13.7 6 04/18 18Z 65 42 274 1 0.00 0.00 558 571 9.6 -15.2 1015.5 90 CLR 225SCT242 270BKN337 65 50 15.0 0.0 0.415 13.1 9 04/18 21Z 68 41 281 6 0.00 0.00 559 571 10.0 -15.5 1014.3 99 CLR CLR 245OVC391 68 64 15.0 0.0 0.409 15.0 12 04/19 00Z 64 45 292 9 0.00 0.00 558 569 10.3 -15.6 1013.0 99 CLR 226FEW241 245OVC393 70 61 15.0 0.0 0.478 15.4 15 04/19 03Z 56 45 308 5 0.00 0.00 558 569 10.6 -15.9 1012.9 100 CLR 228BKN241 241OVC398 64 56 15.0 0.0 0.453 15.5 18 04/19 06Z 56 45 307 3 0.00 0.00 558 568 10.6 -16.8 1013.0 100 CLR 216BKN241 241OVC394 64 55 15.0 0.0 0.537 14.5 21 04/19 09Z 54 46 296 3 0.00 0.00 556 567 10.4 -17.0 1012.3 100 CLR 189OVC240 240OVC385 55 54 15.0 0.0 0.493 13.8 24 04/19 12Z 53 46 297 2 0.00 0.00 555 565 9.7 -17.7 1011.9 100 CLR 192OVC240 240OVC379 55 53 15.0 0.0 0.500 12.3 27 04/19 15Z 55 45 192 1 0.00 0.00 554 565 9.4 -16.5 1012.2 100 CLR 158BKN240 250OVC333 55 53 15.0 0.0 0.437 11.9 30 04/19 18Z 63 42 281 3 0.00 0.00 554 565 9.1 -16.6 1012.6 98 CLR 157BKN236 263BKN345 63 53 15.0 0.0 0.482 10.7 33 04/19 21Z 67 41 280 9 0.00 0.00 556 565 8.1 -16.1 1011.3 56 CLR 160FEW184 327SCT380 67 63 15.0 0.0 0.544 13.1 36 04/20 00Z 63 39 271 8 0.00 0.00 556 565 9.8 -15.7 1010.7 70 CLR 159FEW180 302BKN388 67 62 15.0 0.0 0.485 12.1 39 04/20 03Z 57 42 307 5 0.00 0.00 555 565 10.6 -15.9 1010.8 100 CLR CLR 259OVC401 63 57 15.0 0.0 0.474 13.3 42 04/20 06Z 55 40 186 2 0.00 0.00 555 565 9.7 -16.2 1012.1 100 CLR CLR 255OVC401 63 55 15.0 0.0 0.395 11.4 45 04/20 09Z 52 40 144 6 0.00 0.00 554 564 8.2 -16.4 1012.5 47 CLR 230FEW240 274SCT392 55 52 15.0 0.0 0.569 10.0 48 04/20 12Z 51 45 137 8 0.00 0.00 553 563 7.0 -16.3 1012.2 29 096FEW119 174FEW186 273SCT374 55 52 15.0 0.0 0.774 9.8 51 04/20 15Z 55 41 131 9 0.00 0.00 553 563 7.6 -16.1 1012.1 28 088SCT118 219FEW231 CLR 55 51 15.0 0.0 0.805 11.3 54 04/20 18Z 61 39 129 6 0.00 0.00 553 564 6.9 -16.3 1012.3 52 076SCT119 123FEW143 385FEW410 61 51 15.0 0.0 0.847 11.6 57 04/20 21Z 60 46 195 8 0.00 0.00 553 564 7.5 -16.0 1012.1 99 054OVC119 119SCT155 346FEW386 62 59 15.0 0.0 0.916 11.6 60 04/21 00Z 60 49 169 12 0.01 0.00 553 562 6.8 -17.5 1011.2 99 -RA 053OVC119 119BKN163 345FEW385 63 58 14.7 0.0 1.045 10.7 63 04/21 03Z 54 53 243 6 0.14 0.00 551 561 5.2 -17.2 1012.0 100 -RA 012OVC119 119OVC195 CLR 61 54 4.2 0.0 1.091 8.3 66 04/21 06Z 53 52 219 1 0.23 0.01 550 560 4.4 -17.0 1012.4 100 RA 007OVC118 118BKN197 CLR 61 53 3.2 0.0 1.043 8.2 69 04/21 09Z 54 53 130 4 0.21 0.00 548 558 4.8 -18.6 1011.2 100 RA 000OVC118 118OVC198 CLR 54 53 6.5 0.0 1.026 8.6 72 04/21 12Z 54 53 147 4 0.23 0.03 546 555 4.5 -20.1 1010.5 100 -TSRA 000OVC117 127OVC197 CLR 55 53 6.3 0.0 0.911 8.1 75 04/21 15Z 54 51 158 9 0.08 0.08 544 553 3.9 -23.5 1010.5 88 -TSRA 028BKN108 123FEW139 CLR 55 53 6.8 0.0 0.753 8.5 78 04/21 18Z 59 49 179 11 0.04 0.04 542 551 2.8 -25.2 1011.1 64 -TSRA 032BKN106 167FEW207 234FEW254 59 53 13.3 0.0 0.755 8.3 81 04/21 21Z 59 48 206 15 0.05 0.05 541 550 2.8 -26.1 1010.7 100 -TSRA 058SCT085 140OVC233 233OVC252 60 59 11.5 0.0 0.618 8.6 84 04/22 00Z 57 48 223 15 0.03 0.03 541 550 1.9 -25.2 1010.9 59 -TSRA 054SCT080 141BKN233 233BKN252 60 57 7.8 0.0 0.693 7.3 87 04/22 03Z 52 46 253 13 0.04 0.04 539 550 1.5 -25.8 1012.7 43 -TSRA 038SCT063 191FEW206 233FEW245 57 52 13.7 0.0 0.669 5.7 90 04/22 06Z 51 46 252 11 0.03 0.03 538 551 1.2 -26.2 1015.4 41 -TSRA 040SCT065 194FEW208 233FEW246 57 51 11.1 0.0 0.569 5.4 93 04/22 09Z 51 45 243 8 0.05 0.05 538 552 0.9 -26.5 1017.1 58 -TSRA 023FEW029 179SCT211 CLR 51 50 7.8 0.0 0.557 5.3 96 04/22 12Z 49 44 345 2 0.03 0.02 538 553 0.5 -26.9 1018.2 79 -TSRA 037SCT089 137BKN212 CLR 51 49 15.5 0.0 0.655 4.7 99 04/22 15Z 50 47 133 8 0.07 0.00 539 555 1.0 -26.1 1020.1 99 000BKN105 148SCT188 CLR 50 49 15.0 0.0 0.650 4.9 102 04/22 18Z 56 47 139 8 0.00 0.00 541 559 1.5 -24.0 1021.1 80 007BKN092 149FEW189 CLR 56 49 14.8 0.0 0.603 5.9 105 04/22 21Z 57 46 144 3 0.01 0.01 544 562 1.9 -23.4 1021.3 76 -RA 026BKN049 CLR CLR 57 56 15.0 0.0 0.563 6.9 108 04/23 00Z 59 46 269 4 0.00 0.00 546 563 2.5 -21.7 1020.4 69 -RA 029BKN050 CLR 308FEW319 60 56 15.0 0.0 0.533 7.9 111 04/23 03Z 53 45 296 8 0.00 0.00 546 563 3.0 -20.1 1020.7 7 FEW CLR 308FEW319 59 53 15.0 0.0 0.538 7.7 114 04/23 06Z 50 45 286 6 0.00 0.00 546 563 3.5 -21.9 1021.2 4 FEW CLR CLR 59 50 15.0 0.0 0.517 7.8 117 04/23 09Z 49 46 264 3 0.00 0.00 548 565 4.4 -18.0 1020.6 0 CLR CLR CLR 50 49 15.0 0.0 0.500 7.9 120 04/23 12Z 48 46 241 2 0.00 0.00 549 566 4.6 -16.8 1020.2 1 CLR CLR CLR 50 48 15.1 0.0 0.455 7.3 123 04/23 15Z 52 47 173 1 0.00 0.00 551 567 5.6 -16.6 1020.0 8 012FEW014 CLR CLR 52 48 15.0 0.0 0.461 7.3 126 04/23 18Z 58 45 296 4 0.00 0.00 552 568 5.3 -16.9 1019.1 7 010FEW014 CLR CLR 58 48 15.0 0.0 0.437 7.5 129 04/23 21Z 61 45 292 9 0.00 0.00 554 568 5.8 -17.5 1017.5 5 CLR CLR 269FEW287 61 58 15.0 0.0 0.451 9.7 132 04/24 00Z 57 47 280 11 0.00 0.00 554 567 6.4 -17.5 1016.2 8 CLR CLR 302FEW327 62 56 15.0 0.0 0.499 10.2 135 04/24 03Z 52 45 270 7 0.00 0.00 553 567 7.1 -17.5 1016.6 51 CLR 230FEW240 266SCT377 58 52 15.0 0.0 0.478 10.2 138 04/24 06Z 50 44 251 4 0.00 0.00 554 567 9.1 -17.5 1016.1 76 CLR 230FEW240 249BKN382 58 50 15.0 0.0 0.365 10.9 141 04/24 09Z 49 45 193 3 0.00 0.00 554 566 8.1 -18.3 1014.9 94 CLR CLR 245BKN369 50 49 15.0 0.0 0.406 11.3 144 04/24 12Z 49 45 186 3 0.00 0.00 554 566 8.3 -18.7 1014.3 97 CLR CLR 244BKN370 50 49 15.0 0.0 0.408 11.5 147 04/24 15Z 52 46 207 3 0.00 0.00 553 566 8.1 -18.8 1014.8 64 CLR CLR 257BKN344 52 48 15.0 0.0 0.539 10.0 150 04/24 18Z 59 47 256 3 0.00 0.00 554 566 8.4 -19.0 1014.6 70 CLR CLR 264BKN366 59 48 15.0 0.0 0.540 10.0 153 04/24 21Z 64 48 292 7 0.00 0.00 555 566 9.0 -19.1 1013.2 95 CLR CLR 259BKN366 64 59 15.0 0.0 0.523 11.7 156 04/25 00Z 61 48 288 9 0.00 0.00 555 565 9.7 -18.8 1011.8 97 CLR CLR 257BKN368 65 59 15.0 0.0 0.466 13.4 159 04/25 03Z 53 48 271 6 0.00 0.00 555 565 10.6 -18.8 1012.3 100 CLR CLR 247OVC353 61 53 15.0 0.0 0.435 13.1 162 04/25 06Z 51 48 254 4 0.00 0.00 554 565 10.4 -18.7 1012.8 100 012FEW015 CLR 251OVC339 61 51 13.4 0.0 0.436 12.3 165 04/25 09Z 52 47 244 4 0.00 0.00 553 564 10.2 -19.0 1012.5 100 010BKN017 CLR 256OVC329 52 51 13.5 0.0 0.480 11.5 168 04/25 12Z 51 47 259 3 0.00 0.00 553 563 10.0 -19.1 1012.1 100 008BKN018 CLR 257OVC320 52 50 15.0 0.0 0.518 10.9