Station ID: KOAK Lat: 37.71 Long: 122.23 GFS Model Run: 0Z 21APR 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 04/21 00Z 56 52 212 6 0.00 0.00 552 562 6.7 -16.7 1011.4 100 -RA 000OVC000 000OVC000 000FEW000 **** **** 11.7 0.0 1.093 9.2 3 04/21 03Z 55 54 242 8 0.35 0.01 550 560 4.5 -17.8 1012.4 100 RA 000OVC118 118OVC207 377FEW400 56 54 2.4 0.0 1.029 8.5 6 04/21 06Z 53 51 116 3 0.16 0.00 549 559 5.3 -18.7 1012.6 100 RA 004OVC113 118BKN198 376FEW400 56 53 6.3 0.0 0.972 7.9 9 04/21 09Z 53 51 159 3 0.15 0.02 547 557 3.1 -18.7 1012.7 100 -TSRA 000OVC117 117OVC189 CLR 53 53 7.9 0.0 0.910 7.9 12 04/21 12Z 53 51 160 5 0.07 0.04 544 554 3.3 -21.4 1011.8 99 -TSRA 000OVC115 118BKN194 CLR 54 53 8.1 0.0 0.765 7.8 15 04/21 15Z 54 50 170 6 0.05 0.05 542 552 3.0 -23.6 1012.2 84 -TSRA 041BKN117 117SCT131 CLR 54 52 7.7 0.0 0.786 7.7 18 04/21 18Z 58 49 198 11 0.08 0.08 542 552 2.7 -25.0 1012.5 62 -TSRA 042SCT116 120SCT149 CLR 58 52 9.8 0.0 0.758 8.0 21 04/21 21Z 53 48 259 10 0.05 0.04 540 551 1.8 -25.1 1013.4 96 -TSRA 038BKN110 117BKN233 233BKN243 59 53 10.9 0.0 0.763 7.0 24 04/22 00Z 57 45 243 11 0.01 0.01 539 550 1.5 -26.1 1013.0 83 -TSRA 025BKN110 117BKN232 233SCT242 59 53 12.3 0.0 0.608 6.9 27 04/22 03Z 52 45 249 9 0.01 0.01 538 550 1.7 -26.5 1014.9 39 -RA 053FEW074 152SCT197 CLR 57 52 15.1 0.0 0.509 5.9 30 04/22 06Z 51 45 254 9 0.01 0.01 537 552 0.9 -26.4 1017.5 19 -RA 052FEW072 152FEW197 CLR 57 51 12.8 0.0 0.578 5.2 33 04/22 09Z 49 45 231 6 0.02 0.02 537 553 0.4 -24.3 1019.2 49 -TSRA 064SCT092 117FEW149 CLR 51 50 13.6 0.0 0.614 5.3 36 04/22 12Z 49 45 149 4 0.01 0.01 540 557 0.7 -18.9 1020.3 34 -RA 061SCT096 117FEW149 CLR 51 49 15.0 0.0 0.613 5.2 39 04/22 15Z 51 45 134 7 0.00 0.00 543 561 0.9 -18.9 1021.8 63 029BKN064 CLR CLR 51 48 15.0 0.0 0.554 5.1 42 04/22 18Z 56 45 119 5 0.00 0.00 545 564 1.3 -18.5 1022.7 78 030BKN056 CLR 298FEW320 56 48 15.0 0.0 0.576 6.3 45 04/22 21Z 59 45 266 5 0.00 0.00 546 565 1.7 -18.7 1022.3 100 036OVC050 CLR 266OVC353 59 56 15.0 0.0 0.598 7.7 48 04/23 00Z 61 47 275 8 0.00 0.00 548 565 2.9 -18.3 1020.7 63 037BKN050 CLR 264BKN349 62 56 15.0 0.0 0.574 8.5 51 04/23 03Z 54 48 277 7 0.00 0.00 548 565 3.8 -17.9 1020.7 20 CLR CLR 312FEW363 61 54 15.0 0.0 0.563 8.0 54 04/23 06Z 51 47 275 4 0.00 0.00 547 565 4.0 -17.2 1021.1 28 CLR CLR 300SCT348 61 51 15.0 0.0 0.511 7.6 57 04/23 09Z 49 43 298 3 0.00 0.00 548 565 3.7 -17.4 1020.2 3 CLR CLR 271FEW283 51 49 15.0 0.0 0.386 7.7 60 04/23 12Z 47 42 30 2 0.00 0.00 548 565 3.1 -16.4 1019.9 1 CLR CLR 271FEW282 51 47 15.0 0.0 0.415 7.1 63 04/23 15Z 50 42 30 2 0.00 0.00 550 566 3.3 -16.2 1019.7 28 CLR CLR 298SCT332 51 46 15.0 0.0 0.493 7.0 66 04/23 18Z 60 45 335 3 0.00 0.00 551 567 3.9 -16.3 1018.8 19 CLR CLR 310FEW340 60 46 15.0 0.0 0.514 8.0 69 04/23 21Z 63 46 297 10 0.00 0.00 553 567 4.5 -16.2 1016.7 20 CLR CLR 337FEW376 63 60 15.0 0.0 0.562 10.7 72 04/24 00Z 60 46 286 12 0.00 0.00 554 566 6.0 -16.2 1014.7 25 CLR CLR 337FEW378 64 58 15.0 0.0 0.574 11.0 75 04/24 03Z 54 45 273 8 0.00 0.00 554 566 6.9 -16.4 1014.9 77 CLR CLR 262BKN379 60 54 15.0 0.0 0.544 11.2 78 04/24 06Z 51 46 228 3 0.00 0.00 554 566 8.0 -16.9 1014.7 89 CLR CLR 266BKN376 60 51 15.0 0.0 0.492 11.1 81 04/24 09Z 51 46 199 4 0.00 0.00 554 565 7.4 -17.2 1013.6 100 CLR 230FEW240 255OVC365 52 51 15.0 0.0 0.510 11.0 84 04/24 12Z 51 46 197 4 0.00 0.00 553 564 7.1 -17.6 1012.7 100 CLR 220SCT239 247OVC355 52 51 15.0 0.0 0.534 10.3 87 04/24 15Z 53 47 218 4 0.00 0.00 552 563 7.1 -19.1 1013.0 100 CLR 195OVC239 243OVC331 53 51 15.0 0.0 0.546 8.9 90 04/24 18Z 58 46 254 5 0.00 0.00 552 563 7.0 -18.2 1012.9 100 016FEW019 191OVC236 251OVC328 58 51 15.0 0.0 0.566 7.7 93 04/24 21Z 61 47 269 11 0.00 0.00 552 562 6.7 -18.3 1012.1 100 CLR 206BKN226 255OVC318 61 58 15.0 0.0 0.633 9.0 96 04/25 00Z 58 46 272 11 0.00 0.00 552 561 6.7 -17.9 1011.2 100 CLR 211BKN232 255BKN315 61 57 15.0 0.0 0.688 8.2 99 04/25 03Z 53 46 264 8 0.00 0.00 552 561 6.5 -17.6 1011.2 60 CLR 220FEW230 257SCT290 58 53 15.0 0.0 0.644 7.2 102 04/25 06Z 51 46 260 7 0.00 0.00 551 560 6.5 -17.9 1011.7 55 021FEW024 216SCT235 257FEW289 58 51 15.0 0.0 0.630 6.2 105 04/25 09Z 50 44 236 5 0.00 0.00 550 559 6.4 -18.0 1011.0 8 FEW 210FEW219 308FEW319 51 50 15.0 0.0 0.708 5.6 108 04/25 12Z 50 43 220 7 0.00 0.00 548 557 5.1 -18.2 1010.8 23 091FEW098 169FEW188 287FEW312 51 50 15.0 0.0 0.751 5.0 111 04/25 15Z 53 43 217 8 0.00 0.00 546 556 3.5 -19.0 1011.2 99 046BKN065 119BKN157 268BKN306 53 50 15.0 0.0 0.773 5.2 114 04/25 18Z 56 42 223 8 0.00 0.00 546 556 0.5 -19.7 1011.6 100 044BKN070 118BKN161 267BKN306 56 50 15.0 0.0 0.698 6.3 117 04/25 21Z 58 42 237 9 0.00 0.00 547 556 1.4 -19.5 1011.6 100 031OVC058 130FEW182 264SCT306 58 56 15.0 0.0 0.683 7.4 120 04/26 00Z 58 42 252 9 0.00 0.00 547 557 1.7 -18.5 1011.0 100 035OVC060 150FEW218 262FEW309 59 56 15.0 0.0 0.645 7.9 123 04/26 03Z 53 43 255 7 0.00 0.00 548 558 2.3 -18.6 1011.9 89 050BKN059 140FEW163 250BKN344 58 53 15.0 0.0 0.646 7.1 126 04/26 06Z 51 44 228 3 0.00 0.00 547 558 1.6 -19.2 1013.3 78 050SCT060 137FEW155 263BKN345 58 51 15.0 0.0 0.647 6.8 129 04/26 09Z 50 44 170 3 0.00 0.00 547 559 1.3 -19.4 1013.9 35 052FEW059 CLR 308SCT350 51 50 15.0 0.0 0.577 6.7 132 04/26 12Z 48 44 148 5 0.00 0.00 547 559 1.1 -19.7 1014.7 48 052FEW059 CLR 311SCT350 51 48 15.0 0.0 0.529 6.7 135 04/26 15Z 52 44 152 5 0.00 0.00 546 560 1.0 -19.6 1016.0 53 049FEW056 CLR 293SCT350 52 48 15.0 0.0 0.546 6.6 138 04/26 18Z 57 44 263 6 0.00 0.00 547 561 1.1 -19.4 1016.9 43 049FEW059 CLR 289SCT346 57 48 15.0 0.0 0.569 6.9 141 04/26 21Z 59 44 280 10 0.00 0.00 547 561 2.1 -20.0 1017.1 81 042BKN062 228FEW237 237FEW247 59 57 15.0 0.0 0.536 7.3 144 04/27 00Z 58 43 276 11 0.00 0.00 548 561 2.4 -20.1 1016.5 63 044BKN060 221FEW230 CLR 59 57 15.0 0.0 0.502 7.3 147 04/27 03Z 52 42 270 7 0.00 0.00 548 562 3.4 -18.9 1016.8 11 FEW CLR CLR 58 52 15.0 0.0 0.497 6.1 150 04/27 06Z 50 41 290 5 0.00 0.00 549 563 3.3 -18.7 1017.6 12 FEW CLR 282FEW327 58 50 15.0 0.0 0.446 5.8 153 04/27 09Z 50 41 273 4 0.00 0.00 548 563 2.8 -17.9 1018.0 24 CLR CLR 278FEW338 50 50 15.0 0.0 0.440 5.3 156 04/27 12Z 49 40 280 2 0.00 0.00 548 563 2.6 -17.5 1018.2 50 CLR CLR 295SCT350 50 49 15.0 0.0 0.451 5.3 159 04/27 15Z 54 40 205 1 0.00 0.00 548 563 1.7 -17.0 1018.2 95 029BKN048 CLR 266BKN362 54 49 15.0 0.0 0.523 5.4 162 04/27 18Z 57 40 246 3 0.00 0.00 549 564 3.2 -16.2 1017.9 95 031SCT047 202SCT232 268BKN367 58 49 15.0 0.0 0.549 6.5 165 04/27 21Z 61 40 282 10 0.00 0.00 551 566 2.4 -14.7 1017.8 28 CLR 168FEW190 304FEW351 61 57 15.0 0.0 0.598 7.9 168 04/28 00Z 59 41 291 9 0.00 0.00 552 566 5.3 -15.0 1017.0 32 CLR 176FEW193 317SCT369 61 57 15.0 0.0 0.632 8.1