Station ID: KOAK Lat: 37.71 Long: 122.23 GFS Model Run: 12Z 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 12Z 52 50 181 5 0.00 0.00 544 554 3.2 -22.4 1011.7 86 -RA 000BKN000 CLR CLR **** **** 10.2 0.0 0.749 7.6 3 04/21 15Z 54 50 173 6 0.05 0.05 541 552 3.0 -24.5 1012.6 87 -TSRA 051BKN116 118SCT133 CLR 54 52 12.1 0.0 0.769 7.3 6 04/21 18Z 58 48 214 11 0.06 0.06 541 552 2.6 -25.4 1013.3 65 -TSRA 052BKN109 124FEW141 233FEW243 58 52 8.9 0.0 0.731 7.6 9 04/21 21Z 58 44 224 12 0.04 0.04 540 551 1.1 -25.9 1013.8 100 -TSRA 039BKN112 142OVC233 233BKN242 59 58 14.7 0.0 0.701 7.5 12 04/22 00Z 58 43 251 13 0.01 0.01 539 551 1.7 -26.2 1013.3 86 -TSRA 035BKN112 133BKN232 233BKN242 59 57 15.0 0.0 0.557 7.4 15 04/22 03Z 53 45 250 9 0.00 0.00 539 551 1.6 -26.3 1015.3 4 CLR 194FEW224 CLR 58 53 15.2 0.0 0.526 6.0 18 04/22 06Z 50 46 240 7 0.02 0.02 538 552 1.3 -26.9 1017.9 14 -RA 025FEW029 162FEW187 CLR 58 50 10.1 0.0 0.595 5.5 21 04/22 09Z 50 46 182 6 0.02 0.02 539 555 1.0 -20.3 1019.0 62 -TSRA 072FEW109 124BKN174 CLR 51 50 12.7 0.0 0.648 5.5 24 04/22 12Z 50 46 150 7 0.03 0.03 541 557 0.7 -18.9 1019.9 79 -TSRA 056BKN116 120BKN158 CLR 51 49 14.5 0.0 0.697 5.7 27 04/22 15Z 50 45 132 7 0.02 0.01 542 560 1.8 -18.9 1021.1 100 -RA 000OVC117 117BKN139 CLR 50 49 9.8 0.0 0.692 5.4 30 04/22 18Z 53 47 130 6 0.02 0.01 543 562 1.7 -18.8 1022.8 100 -RA 000OVC106 118SCT137 304FEW317 53 49 13.1 0.0 0.643 5.8 33 04/22 21Z 60 47 211 3 0.00 0.00 545 563 2.6 -19.0 1022.0 76 026BKN052 CLR 300FEW327 60 53 15.0 0.0 0.598 7.4 36 04/23 00Z 60 47 303 8 0.00 0.00 546 564 3.2 -19.4 1021.0 41 026SCT051 CLR 300FEW324 62 53 15.0 0.0 0.579 8.4 39 04/23 03Z 54 48 300 6 0.00 0.00 547 565 3.7 -19.4 1021.1 3 FEW CLR CLR 60 54 15.0 0.0 0.532 8.6 42 04/23 06Z 53 48 309 4 0.00 0.00 548 566 4.0 -20.0 1021.7 5 FEW CLR 311FEW342 60 53 15.0 0.0 0.485 9.0 45 04/23 09Z 51 47 346 3 0.00 0.00 549 566 5.3 -18.0 1020.9 3 CLR CLR 298FEW329 53 51 15.0 0.0 0.440 8.9 48 04/23 12Z 50 46 343 3 0.00 0.00 550 567 4.7 -17.7 1020.6 1 CLR CLR CLR 53 50 15.0 0.0 0.463 8.7 51 04/23 15Z 52 45 349 3 0.00 0.00 550 567 5.7 -17.7 1020.7 0 CLR CLR CLR 53 49 15.0 0.0 0.382 8.6 54 04/23 18Z 60 41 291 4 0.00 0.00 552 569 7.1 -17.2 1019.8 2 CLR CLR 310FEW344 61 48 15.0 0.0 0.355 9.1 57 04/23 21Z 63 39 289 8 0.00 0.00 553 569 7.7 -17.2 1018.4 4 CLR CLR 289FEW310 63 60 15.0 0.0 0.343 10.8 60 04/24 00Z 60 43 285 9 0.00 0.00 554 568 8.4 -17.4 1016.4 20 CLR CLR 279FEW315 63 59 15.0 0.0 0.345 11.6 63 04/24 03Z 53 46 267 7 0.00 0.00 554 568 9.2 -17.4 1016.5 34 CLR CLR 292SCT328 60 53 15.0 0.0 0.367 11.5 66 04/24 06Z 51 46 241 5 0.00 0.00 554 568 9.4 -17.0 1016.9 66 CLR 227FEW240 271BKN318 60 51 15.0 0.0 0.367 10.3 69 04/24 09Z 50 46 233 4 0.00 0.00 554 567 9.3 -17.3 1015.9 100 017FEW018 209BKN240 257OVC358 51 50 15.0 0.0 0.396 9.1 72 04/24 12Z 50 46 196 3 0.00 0.00 553 565 9.3 -19.1 1014.4 100 015FEW018 196BKN240 248OVC361 51 50 15.0 0.0 0.423 10.0 75 04/24 15Z 53 46 223 3 0.00 0.00 552 564 8.6 -16.6 1014.8 100 015FEW017 179OVC231 241SCT311 53 50 15.0 0.0 0.460 8.0 78 04/24 18Z 57 46 261 6 0.00 0.00 552 564 8.1 -16.9 1014.5 100 016FEW021 171OVC223 240BKN290 57 50 15.0 0.0 0.498 6.9 81 04/24 21Z 61 46 278 10 0.00 0.00 552 563 8.1 -17.7 1013.4 99 CLR 160BKN207 254FEW265 61 57 15.0 0.0 0.563 9.0 84 04/25 00Z 58 46 277 10 0.00 0.00 551 561 8.2 -18.0 1012.3 99 CLR 146OVC208 256FEW276 61 57 15.0 0.0 0.576 8.2 87 04/25 03Z 52 46 276 7 0.00 0.00 551 561 7.6 -17.6 1012.1 66 CLR 136BKN182 238FEW248 58 52 15.0 0.0 0.657 7.1 90 04/25 06Z 51 45 258 7 0.00 0.00 551 561 7.4 -16.6 1012.7 36 CLR 136SCT180 CLR 58 51 15.0 0.0 0.578 6.0 93 04/25 09Z 50 44 242 5 0.00 0.00 550 560 6.8 -15.8 1011.9 85 021FEW028 121FEW140 277BKN340 51 50 15.0 0.0 0.587 5.4 96 04/25 12Z 50 44 216 5 0.00 0.00 549 558 6.1 -15.9 1010.9 93 015SCT030 142FEW164 256BKN338 51 50 15.0 0.0 0.608 5.2 99 04/25 15Z 52 44 197 5 0.00 0.00 547 555 4.2 -17.5 1010.7 100 022SCT033 200BKN228 237OVC338 52 50 15.0 0.0 0.669 5.5 102 04/25 18Z 56 44 217 9 0.00 0.00 545 554 0.8 -19.3 1011.1 100 057SCT078 152BKN226 236OVC318 56 50 15.0 0.0 0.759 6.6 105 04/25 21Z 56 44 231 9 0.00 0.00 544 553 1.8 -20.1 1010.8 100 054OVC099 117OVC236 236OVC303 56 55 15.0 0.0 0.783 6.4 108 04/26 00Z 57 44 245 8 0.00 0.00 544 552 1.6 -19.8 1009.8 100 044BKN107 117BKN233 237BKN299 58 55 15.0 0.0 0.780 7.4 111 04/26 03Z 53 45 247 6 0.00 0.00 545 553 1.9 -18.4 1010.1 90 -RA 053BKN093 130FEW229 236BKN319 57 53 15.0 0.0 0.745 6.9 114 04/26 06Z 51 45 239 4 0.00 0.00 546 555 1.6 -18.4 1010.9 87 056SCT094 137FEW217 247BKN327 57 51 15.0 0.0 0.720 6.1 117 04/26 09Z 49 45 161 3 0.00 0.00 546 555 1.4 -18.9 1011.5 86 064FEW081 225FEW235 247BKN349 51 49 15.0 0.0 0.710 6.3 120 04/26 12Z 50 45 129 5 0.00 0.00 546 556 1.4 -19.8 1011.6 93 037SCT070 201FEW218 241BKN347 51 49 15.0 0.0 0.735 6.5 123 04/26 15Z 51 45 143 6 0.00 0.00 546 557 1.8 -19.9 1013.1 100 046OVC067 188SCT233 237OVC345 51 49 15.0 0.0 0.746 6.4 126 04/26 18Z 56 46 209 5 0.00 0.00 547 559 1.8 -19.6 1014.2 100 042OVC068 188FEW231 248BKN337 56 49 15.0 0.0 0.751 6.4 129 04/26 21Z 58 44 241 7 0.01 0.01 547 559 1.7 -19.7 1014.5 100 -RA 020OVC075 CLR 264SCT306 58 56 15.0 0.0 0.646 7.3 132 04/27 00Z 58 43 253 8 0.00 0.00 547 559 2.0 -19.9 1014.1 100 028OVC075 CLR 265BKN348 59 56 15.0 0.0 0.596 7.7 135 04/27 03Z 55 43 261 6 0.00 0.00 547 559 2.3 -19.7 1014.6 100 042OVC069 220SCT237 267OVC349 58 55 15.0 0.0 0.542 7.1 138 04/27 06Z 52 43 185 3 0.00 0.00 547 560 1.6 -19.7 1015.0 100 046BKN068 212SCT237 254OVC359 58 52 15.0 0.0 0.521 6.9 141 04/27 09Z 51 44 147 4 0.00 0.00 547 560 1.6 -19.0 1015.3 100 055FEW059 169OVC237 251OVC318 52 51 15.0 0.0 0.573 7.2 144 04/27 12Z 50 42 139 5 0.00 0.00 546 559 1.6 -18.7 1015.9 100 053FEW066 158BKN237 250OVC342 52 50 15.0 0.0 0.623 7.1 147 04/27 15Z 53 42 141 5 0.00 0.00 546 559 2.1 -17.5 1015.8 100 052FEW071 145OVC230 246BKN355 53 50 15.0 0.0 0.643 7.4 150 04/27 18Z 59 42 169 2 0.00 0.00 547 560 2.6 -16.8 1015.5 100 055FEW071 150BKN222 242OVC358 59 50 15.0 0.0 0.668 8.1 153 04/27 21Z 60 43 286 7 0.00 0.00 549 561 3.0 -17.0 1014.7 100 085SCT103 126OVC226 238OVC379 61 59 15.0 0.0 0.720 9.0 156 04/28 00Z 59 47 292 8 0.00 0.00 549 560 4.3 -16.7 1013.7 100 093SCT109 122OVC232 238OVC385 62 57 15.0 0.0 0.811 8.8 159 04/28 03Z 55 46 317 4 0.00 0.00 549 560 4.1 -16.2 1013.4 100 081FEW095 118OVC238 238OVC399 58 55 15.0 0.0 0.860 8.5 162 04/28 06Z 54 46 317 3 0.00 0.00 549 560 3.0 -16.9 1013.0 100 091SCT110 123OVC232 238OVC397 58 54 15.0 0.0 0.924 8.7 165 04/28 09Z 53 47 20 2 0.02 0.00 549 559 3.1 -17.0 1011.9 100 -RA 022OVC117 125OVC230 238OVC378 55 53 14.4 0.0 0.978 7.3 168 04/28 12Z 51 49 68 4 0.11 0.00 550 557 3.8 -17.1 1009.4 100 -RA 011OVC117 121OVC234 237OVC373 55 51 6.0 0.0 1.017 7.1