Station ID: KOAK Lat: 37.71 Long: 122.23 GFS Model Run: 12Z 17APR 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 04/17 12Z 50 26 30 4 0.00 0.00 555 569 8.8 -15.8 1017.0 5 CLR CLR 000FEW000 **** **** 15.0 0.0 0.152 9.6 3 04/17 15Z 52 27 41 4 0.00 0.00 555 570 7.8 -15.7 1018.5 6 CLR CLR 364FEW393 53 48 15.0 0.0 0.148 8.3 6 04/17 18Z 62 27 16 8 0.00 0.00 556 571 7.9 -14.8 1018.5 4 CLR CLR 363FEW387 62 48 15.0 0.0 0.158 9.1 9 04/17 21Z 66 31 307 9 0.00 0.00 557 572 6.3 -14.4 1017.5 10 CLR CLR 351FEW368 67 62 15.0 0.0 0.216 12.2 12 04/18 00Z 62 41 289 9 0.00 0.00 558 572 7.8 -14.1 1016.7 26 CLR CLR 315SCT386 67 60 15.0 0.0 0.304 12.6 15 04/18 03Z 54 42 294 5 0.00 0.00 558 572 9.4 -14.2 1016.9 92 CLR CLR 267BKN345 61 54 15.0 0.0 0.310 13.0 18 04/18 06Z 52 42 246 3 0.00 0.00 558 572 9.7 -14.8 1017.5 96 CLR 224FEW242 262BKN368 61 52 15.0 0.0 0.348 12.8 21 04/18 09Z 50 42 200 2 0.00 0.00 557 572 9.6 -14.4 1017.1 88 CLR 232FEW242 256BKN344 51 50 15.0 0.0 0.359 12.6 24 04/18 12Z 49 42 150 2 0.00 0.00 557 571 9.5 -14.9 1016.2 71 CLR 215FEW241 260BKN336 51 49 15.0 0.0 0.403 13.0 27 04/18 15Z 53 40 111 1 0.00 0.00 557 571 9.5 -15.1 1016.5 11 CLR 210FEW226 327FEW348 53 48 15.0 0.0 0.418 12.6 30 04/18 18Z 63 39 281 1 0.00 0.00 558 571 9.8 -15.1 1015.6 52 CLR 213FEW228 313SCT386 63 48 15.0 0.0 0.416 12.3 33 04/18 21Z 67 39 276 5 0.00 0.00 558 570 9.9 -15.2 1014.1 100 CLR 232FEW242 271OVC376 67 63 15.0 0.0 0.412 14.7 36 04/19 00Z 64 43 287 9 0.00 0.00 558 569 10.2 -15.4 1012.9 100 CLR 213SCT241 256OVC388 69 61 15.0 0.0 0.481 15.1 39 04/19 03Z 56 45 315 4 0.00 0.00 558 569 10.7 -15.8 1012.9 100 CLR 214BKN241 241OVC401 63 56 15.0 0.0 0.470 15.1 42 04/19 06Z 55 45 303 3 0.00 0.00 558 569 10.6 -16.7 1013.2 100 CLR 207OVC241 241OVC396 63 55 15.0 0.0 0.575 14.1 45 04/19 09Z 54 45 299 3 0.00 0.00 557 567 10.3 -17.3 1012.3 100 CLR 181OVC240 240OVC389 55 54 15.0 0.0 0.539 13.4 48 04/19 12Z 53 45 273 2 0.00 0.00 556 565 9.9 -18.3 1011.7 100 CLR 181OVC240 240OVC383 55 53 15.0 0.0 0.435 12.8 51 04/19 15Z 55 45 274 1 0.00 0.00 555 565 9.7 -17.4 1012.2 99 CLR 186BKN240 242BKN358 55 52 15.0 0.0 0.393 11.9 54 04/19 18Z 63 43 286 3 0.00 0.00 555 565 9.4 -17.2 1012.6 87 CLR 186BKN238 251SCT357 63 52 15.0 0.0 0.416 10.8 57 04/19 21Z 66 43 284 9 0.00 0.00 555 565 8.4 -15.9 1011.6 90 CLR 166BKN211 259BKN391 66 63 15.0 0.0 0.520 12.8 60 04/20 00Z 64 40 272 9 0.00 0.00 556 565 9.8 -16.3 1011.0 95 CLR 170SCT211 255BKN382 66 62 15.0 0.0 0.481 12.3 63 04/20 03Z 56 43 298 5 0.00 0.00 555 565 10.0 -16.2 1011.7 100 CLR 220SCT237 240OVC401 64 56 15.0 0.0 0.484 12.6 66 04/20 06Z 54 42 61 1 0.00 0.00 555 565 10.5 -16.4 1012.3 100 CLR 218FEW234 246OVC404 64 54 15.0 0.0 0.410 11.8 69 04/20 09Z 52 39 139 5 0.00 0.00 554 564 8.8 -16.0 1012.6 70 CLR 212FEW221 276BKN380 54 52 15.0 0.0 0.406 10.6 72 04/20 12Z 50 40 132 7 0.00 0.00 553 564 8.7 -15.9 1012.3 38 CLR 194FEW207 276SCT377 54 50 15.0 0.0 0.485 10.9 75 04/20 15Z 54 41 124 7 0.00 0.00 553 564 8.3 -16.3 1012.9 11 101FEW119 160FEW177 CLR 54 50 15.0 0.0 0.634 11.1 78 04/20 18Z 63 38 150 5 0.00 0.00 554 565 7.7 -15.9 1012.9 26 093FEW119 132FEW151 CLR 63 50 15.0 0.0 0.706 11.4 81 04/20 21Z 65 40 220 12 0.00 0.00 554 564 7.8 -16.1 1011.6 83 086BKN119 119BKN147 391FEW415 68 63 15.0 0.0 0.720 13.8 84 04/21 00Z 61 46 224 11 0.00 0.00 554 563 9.3 -16.6 1010.6 86 087BKN119 120BKN143 364FEW404 68 60 15.0 0.0 0.784 11.9 87 04/21 03Z 57 48 193 5 0.00 0.00 554 562 9.1 -17.3 1010.2 83 091BKN119 138BKN164 329FEW353 61 57 15.0 0.0 0.827 10.8 90 04/21 06Z 57 46 147 8 0.00 0.00 552 561 7.5 -17.7 1010.2 78 092SCT119 128BKN176 328FEW352 61 56 15.1 0.0 0.884 10.9 93 04/21 09Z 55 52 155 11 0.11 0.00 550 559 5.9 -18.5 1010.4 99 -RA 028OVC118 118OVC211 CLR 59 55 7.6 0.0 1.036 9.2 96 04/21 12Z 51 49 123 11 0.13 0.03 547 556 4.4 -18.5 1010.7 100 -RA 015OVC115 118BKN209 CLR 59 51 4.4 0.0 0.888 8.9 99 04/21 15Z 54 51 147 7 0.06 0.05 544 554 3.6 -21.8 1011.5 95 -TSRA 016BKN077 152BKN222 235SCT261 54 51 8.1 0.0 0.758 8.1 102 04/21 18Z 59 50 194 10 0.07 0.07 543 553 3.4 -24.0 1012.3 96 -TSRA 025BKN079 173BKN225 234FEW258 59 51 10.3 0.0 0.734 8.5 105 04/21 21Z 61 47 208 14 0.04 0.04 542 552 3.3 -24.9 1012.0 100 -TSRA 065SCT104 166OVC227 234OVC256 61 59 9.6 0.0 0.746 9.5 108 04/22 00Z 58 48 211 16 0.04 0.04 541 551 3.2 -26.0 1011.6 100 -TSRA 063SCT110 151OVC225 233BKN256 61 58 11.4 0.0 0.640 8.2 111 04/22 03Z 53 48 212 12 0.03 0.03 540 550 2.5 -26.4 1013.1 2 -TSRA CLR 204FEW216 CLR 58 52 8.5 0.0 0.578 6.8 114 04/22 06Z 52 47 206 9 0.02 0.02 540 552 2.0 -26.1 1015.6 8 -TSRA 019FEW025 CLR CLR 58 52 13.5 0.0 0.570 6.1 117 04/22 09Z 50 47 192 5 0.02 0.02 539 553 1.6 -26.0 1016.2 58 -TSRA 019FEW027 197SCT224 CLR 52 50 14.0 0.0 0.589 5.9 120 04/22 12Z 50 45 165 4 0.04 0.04 538 552 1.0 -26.0 1016.9 78 -TSRA 026SCT037 162BKN221 CLR 52 49 8.9 0.0 0.637 5.4 123 04/22 15Z 53 45 205 3 0.01 0.01 538 553 1.4 -26.7 1017.9 98 086BKN110 122BKN175 235FEW247 53 50 15.1 0.0 0.623 5.5 126 04/22 18Z 57 44 261 6 0.00 0.00 539 555 1.5 -26.0 1019.0 88 081BKN115 134BKN195 234SCT244 57 50 15.0 0.0 0.580 6.3 129 04/22 21Z 60 41 282 12 0.00 0.00 541 556 2.3 -25.8 1018.7 11 063FEW081 213FEW234 234FEW247 60 57 15.0 0.0 0.485 7.6 132 04/23 00Z 57 43 279 13 0.00 0.00 543 558 2.7 -22.9 1018.2 17 063FEW080 212FEW236 237FEW294 60 57 15.0 0.0 0.509 6.8 135 04/23 03Z 52 46 283 8 0.00 0.00 546 562 3.1 -17.7 1018.6 28 CLR 214FEW223 252SCT307 57 52 15.0 0.0 0.643 7.0 138 04/23 06Z 51 47 282 9 0.00 0.00 548 564 3.4 -17.8 1019.4 16 CLR CLR 254FEW306 57 51 15.0 0.0 0.668 7.0 141 04/23 09Z 50 47 282 9 0.00 0.00 547 564 3.2 -19.2 1019.8 10 016FEW019 CLR CLR 51 50 15.0 0.0 0.613 7.0 144 04/23 12Z 50 48 286 7 0.00 0.00 547 563 3.1 -20.4 1019.6 36 014FEW021 221FEW237 237FEW247 51 50 15.0 0.0 0.571 6.2 147 04/23 15Z 52 46 289 5 0.00 0.00 548 564 3.9 -20.2 1019.7 77 011BKN023 204FEW226 CLR 53 50 15.0 0.0 0.461 5.7 150 04/23 18Z 57 45 279 9 0.00 0.00 549 565 4.9 -19.3 1019.3 61 013BKN024 204FEW226 CLR 57 50 15.0 0.0 0.379 6.5 153 04/23 21Z 58 44 270 15 0.00 0.00 550 566 5.6 -19.5 1018.8 0 CLR CLR CLR 58 57 15.0 0.0 0.361 7.1 156 04/24 00Z 56 43 274 14 0.00 0.00 550 565 6.1 -19.7 1017.3 0 CLR CLR CLR 58 56 15.0 0.0 0.322 6.6 159 04/24 03Z 50 43 276 8 0.00 0.00 550 565 6.4 -19.8 1017.2 0 CLR CLR CLR 56 50 15.0 0.0 0.325 8.6 162 04/24 06Z 48 44 253 5 0.00 0.00 550 565 7.1 -19.5 1017.2 2 CLR CLR 323FEW348 56 48 15.0 0.0 0.370 7.3 165 04/24 09Z 48 44 210 5 0.00 0.00 550 564 7.1 -19.7 1016.4 14 FEW CLR 298FEW324 49 48 15.0 0.0 0.422 7.1 168 04/24 12Z 47 44 156 5 0.00 0.00 550 563 7.2 -20.3 1015.6 20 016FEW020 CLR 276FEW299 49 47 15.0 0.0 0.432 8.7