Station ID: KOAK Lat: 37.71 Long: 122.23 GFS Model Run: 12Z 20SEP 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 09/20 12Z 57 53 216 3 0.00 0.00 570 582 18.0 -8.5 1014.0 100 000BKN000 000OVC000 000OVC000 **** **** 15.0 0.0 0.567 20.9 3 09/20 15Z 57 53 211 4 0.00 0.00 569 581 17.5 -9.0 1014.7 100 000BKN019 CLR 284OVC361 57 57 15.0 0.0 0.628 17.8 6 09/20 18Z 63 53 230 4 0.00 0.00 568 581 17.3 -10.8 1014.8 100 000BKN020 232FEW246 264OVC371 63 57 15.0 0.0 0.668 16.9 9 09/20 21Z 68 53 255 6 0.00 0.00 568 580 17.5 -11.4 1013.7 94 CLR 202BKN246 246BKN361 68 62 15.0 0.0 0.651 15.6 12 09/21 00Z 64 54 275 6 0.00 0.00 567 578 17.3 -12.1 1013.2 97 CLR 193BKN242 251BKN356 68 62 15.0 0.0 0.732 18.7 15 09/21 03Z 58 54 268 5 0.00 0.00 566 577 18.5 -14.5 1013.6 99 012FEW017 162BKN245 259BKN341 64 58 14.6 0.0 0.848 17.8 18 09/21 06Z 58 54 244 5 0.00 0.00 565 577 18.2 -13.1 1014.3 95 010SCT019 165BKN234 258SCT336 64 58 15.0 0.0 0.762 16.4 21 09/21 09Z 58 53 251 5 0.00 0.00 565 577 18.2 -12.9 1013.5 94 005BKN021 CLR CLR 58 58 15.0 0.0 0.786 14.6 24 09/21 12Z 58 53 247 5 0.00 0.00 565 576 18.1 -13.2 1013.1 95 000BKN022 134FEW154 CLR 58 58 15.0 0.0 0.779 15.3 27 09/21 15Z 59 52 220 3 0.00 0.00 565 576 18.1 -13.0 1013.7 96 000BKN024 141FEW156 275FEW301 59 58 15.0 0.0 0.740 15.1 30 09/21 18Z 66 53 248 4 0.00 0.00 566 577 18.3 -13.0 1013.5 65 006BKN024 141FEW156 275FEW300 66 58 15.0 0.0 0.774 13.5 33 09/21 21Z 69 54 272 7 0.00 0.00 566 577 18.4 -12.9 1012.3 0 CLR CLR FEW 69 66 15.0 0.0 0.788 16.3 36 09/22 00Z 63 54 269 8 0.00 0.00 567 577 18.6 -12.4 1012.2 0 CLR CLR CLR 69 63 15.0 0.0 0.789 18.2 39 09/22 03Z 58 54 258 5 0.00 0.00 567 578 18.3 -12.3 1013.0 11 010FEW018 CLR CLR 63 58 13.6 0.0 0.796 18.8 42 09/22 06Z 57 54 237 4 0.00 0.00 567 578 19.3 -12.6 1012.9 42 010FEW017 CLR 294SCT339 63 57 13.5 0.0 0.775 19.2 45 09/22 09Z 56 53 158 5 0.00 0.00 568 578 19.6 -12.6 1012.0 34 011FEW016 CLR 284FEW321 57 56 15.0 0.0 0.763 18.9 48 09/22 12Z 55 53 159 6 0.00 0.00 568 578 19.1 -11.7 1012.0 19 011FEW016 CLR 286FEW320 57 55 15.0 0.0 0.762 19.2 51 09/22 15Z 57 53 167 5 0.00 0.00 568 579 19.5 -10.5 1012.8 0 CLR CLR CLR 57 55 15.0 0.0 0.761 17.8 54 09/22 18Z 66 53 244 2 0.00 0.00 569 580 19.6 -9.8 1013.2 0 CLR CLR CLR 67 55 15.0 0.0 0.757 17.8 57 09/22 21Z 72 54 294 7 0.00 0.00 571 580 19.7 -9.5 1011.2 0 CLR CLR CLR 73 66 15.0 0.0 0.734 18.9 60 09/23 00Z 67 54 287 9 0.00 0.00 571 580 20.3 -9.1 1010.3 1 CLR CLR 368FEW384 74 65 15.1 0.0 0.695 20.9 63 09/23 03Z 59 54 227 4 0.00 0.00 572 581 20.9 -9.7 1010.5 0 CLR CLR CLR 67 59 13.4 0.0 0.688 21.9 66 09/23 06Z 57 54 206 4 0.00 0.00 572 581 20.6 -9.9 1011.1 2 FEW CLR CLR 67 57 13.9 0.0 0.683 22.2 69 09/23 09Z 57 54 183 4 0.00 0.00 572 581 20.9 -9.5 1010.8 2 FEW CLR CLR 57 57 15.0 0.0 0.648 22.8 72 09/23 12Z 56 53 173 2 0.00 0.00 571 580 20.5 -8.4 1010.7 2 CLR CLR 410FEW428 57 56 15.0 0.0 0.621 21.9 75 09/23 15Z 59 52 156 1 0.00 0.00 572 581 19.8 -7.7 1011.7 6 CLR CLR 391FEW407 59 56 15.0 0.0 0.622 21.4 78 09/23 18Z 72 54 292 3 0.00 0.00 573 583 20.0 -7.2 1011.7 32 CLR CLR 346SCT390 72 56 15.0 0.0 0.660 21.6 81 09/23 21Z 75 55 295 9 0.00 0.00 574 583 20.0 -7.0 1010.5 25 FEW CLR 352FEW387 76 72 15.0 0.0 0.667 23.3 84 09/24 00Z 69 54 296 8 0.00 0.00 574 582 20.3 -7.2 1009.5 46 FEW CLR 355SCT407 77 68 15.0 0.0 0.682 24.3 87 09/24 03Z 61 53 280 4 0.00 0.00 574 582 20.5 -7.8 1010.4 100 CLR CLR 313OVC392 69 61 14.9 0.0 0.652 23.6 90 09/24 06Z 60 53 249 2 0.00 0.00 573 582 20.8 -8.6 1011.2 85 CLR CLR 307BKN379 69 59 15.0 0.0 0.703 22.6 93 09/24 09Z 59 53 226 2 0.00 0.00 572 582 20.5 -9.5 1011.2 14 CLR CLR 357FEW381 60 58 15.0 0.0 0.667 22.6 96 09/24 12Z 57 52 228 2 0.00 0.00 571 581 20.2 -10.1 1011.4 48 CLR CLR 348SCT415 60 57 15.0 0.0 0.623 22.3 99 09/24 15Z 59 51 172 2 0.00 0.00 570 581 19.3 -10.3 1012.3 99 CLR CLR 352OVC433 59 57 15.0 0.0 0.631 21.8 102 09/24 18Z 69 51 269 3 0.00 0.00 570 581 19.0 -10.3 1013.0 93 CLR CLR 325BKN409 69 57 15.0 0.0 0.676 21.2 105 09/24 21Z 72 53 271 8 0.00 0.00 570 581 18.4 -9.8 1012.7 13 CLR CLR 321FEW346 74 70 15.0 0.0 0.735 20.3 108 09/25 00Z 66 52 266 8 0.00 0.00 570 581 18.3 -9.9 1013.1 8 CLR CLR 321FEW343 73 65 15.0 0.0 0.700 19.7 111 09/25 03Z 59 53 253 6 0.00 0.00 569 581 17.2 -10.0 1014.0 1 CLR CLR CLR 66 59 15.0 0.0 0.882 19.2 114 09/25 06Z 60 55 245 5 0.00 0.00 569 581 16.0 -10.3 1014.7 0 CLR CLR CLR 66 59 15.0 0.0 1.033 18.0 117 09/25 09Z 59 58 235 5 0.00 0.00 568 581 15.8 -9.7 1014.8 7 CLR CLR 330FEW348 60 59 15.1 0.0 1.064 16.6 120 09/25 12Z 58 57 250 5 0.00 0.00 568 580 15.9 -9.2 1015.1 25 007FEW013 CLR 343FEW360 60 58 15.0 0.0 0.928 16.9 123 09/25 15Z 59 55 240 4 0.00 0.00 568 581 16.0 -8.4 1015.6 80 006BKN015 CLR 380SCT421 60 58 15.0 0.0 0.945 17.3 126 09/25 18Z 66 54 253 4 0.00 0.00 569 582 16.4 -8.1 1015.8 58 007SCT016 CLR 381FEW421 66 58 15.0 0.0 0.848 16.4 129 09/25 21Z 68 54 274 7 0.00 0.00 570 582 16.5 -7.9 1014.4 5 CLR CLR 387FEW405 69 66 15.0 0.0 0.772 18.3 132 09/26 00Z 65 54 266 6 0.00 0.00 570 582 17.4 -7.9 1013.0 4 CLR CLR 385FEW403 69 64 15.0 0.0 0.779 18.6 135 09/26 03Z 58 53 230 4 0.00 0.00 571 582 17.3 -7.5 1013.1 4 CLR CLR 383FEW398 65 58 14.5 0.0 0.716 18.9 138 09/26 06Z 56 53 220 4 0.00 0.00 571 582 17.4 -8.0 1013.2 4 FEW CLR 380FEW393 64 56 13.5 0.0 0.716 19.0 141 09/26 09Z 55 52 221 2 0.00 0.00 570 581 17.5 -8.4 1012.5 4 FEW CLR CLR 56 55 13.7 0.0 0.685 19.3 144 09/26 12Z 55 52 232 2 0.00 0.00 570 580 17.5 -8.7 1012.1 2 FEW CLR CLR 56 55 15.0 0.0 0.693 17.9 147 09/26 15Z 57 52 214 2 0.00 0.00 570 580 17.1 -8.8 1012.3 47 CLR CLR 309SCT363 57 54 15.0 0.0 0.692 17.9 150 09/26 18Z 66 50 254 3 0.00 0.00 570 580 17.0 -8.7 1012.5 41 CLR CLR 310SCT362 67 54 15.0 0.0 0.648 17.5 153 09/26 21Z 69 51 282 8 0.00 0.00 569 579 16.9 -9.0 1011.5 97 CLR CLR 297BKN365 70 66 15.0 0.0 0.638 16.7 156 09/27 00Z 64 52 281 8 0.00 0.00 569 578 16.7 -10.5 1010.9 99 CLR 224FEW246 285OVC360 70 62 15.0 0.0 0.630 17.7 159 09/27 03Z 57 52 264 5 0.00 0.00 568 578 16.9 -11.2 1011.7 100 CLR 226BKN245 246OVC380 63 57 14.5 0.0 0.627 17.1 162 09/27 06Z 57 52 242 4 0.00 0.00 567 577 16.8 -11.4 1012.1 100 CLR 194OVC245 246OVC377 63 57 15.0 0.0 0.664 16.0 165 09/27 09Z 56 51 243 7 0.00 0.00 565 575 15.6 -12.2 1012.0 100 015FEW019 151OVC244 250OVC334 57 56 15.0 0.0 0.571 12.9 168 09/27 12Z 56 51 237 7 0.00 0.00 564 574 15.7 -12.5 1012.1 100 015FEW019 157OVC244 267OVC335 57 56 15.0 0.0 0.611 11.5