| 08:15 EST |  Clear | -10°C / 14°F | -15°C / 5°F | 67% | 1017 mb (30.03 in) | W 7 kph (W 4.6 mph) | - | 10SM |
| | KSFZ 231315Z 28004KT 10SM CLR M10/M15 A3003 RMK AO1 |
| 07:55 EST |  Clear | -11°C / 12°F | -16°C / 3°F | 67% | 1017 mb (30.03 in) | W 7 kph (W 4.6 mph) | - | 10SM |
| | KSFZ 231255Z 27004KT 10SM CLR M11/M16 A3003 RMK AO1 |
| 07:35 EST |  Clear | -11°C / 12°F | -16°C / 3°F | 67% | 1017 mb (30.03 in) | W 6 kph (W 3.5 mph) | - | 10SM |
| | KSFZ 231235Z 27003KT 10SM CLR M11/M16 A3003 RMK AO1 |
| 07:15 EST |  Clear | -12°C / 10°F | -17°C / 1°F | 67% | 1017 mb (30.03 in) | W 7 kph (W 4.6 mph) | - | 10SM |
| | KSFZ 231215Z 27004KT 10SM CLR M12/M17 A3002 RMK AO1 |
| 06:55 EST |  Clear | -11°C / 12°F | -16°C / 3°F | 67% | 1017 mb (30.03 in) | WNW 7 kph (WNW 4.6 mph) | - | 10SM |
| | KSFZ 231155Z 29004KT 10SM CLR M11/M16 A3002 RMK AO1 11090 21110 52003 |
| 06:35 EST |  Clear | -11°C / 12°F | -16°C / 3°F | 67% | 1017 mb (30.03 in) | WNW 7 kph (WNW 4.6 mph) | - | 10SM |
| | KSFZ 231135Z 29004KT 10SM CLR M11/M16 A3002 RMK AO1 |
| 06:15 EST |  Clear | -10°C / 14°F | -16°C / 3°F | 62% | 1017 mb (30.03 in) | W 11 kph (W 6.9 mph) | - | 10SM |
| | KSFZ 231115Z 28006KT 10SM CLR M10/M16 A3002 RMK AO1 |
| 05:55 EST |  Clear | -10°C / 14°F | -16°C / 3°F | 62% | 1016 mb (30 in) | W 13 kph (W 8.1 mph) | - | 10SM |
| | KSFZ 231055Z 28007KT 10SM CLR M10/M16 A3001 RMK AO1 |
| 05:35 EST |  Clear | -10°C / 14°F | -16°C / 3°F | 62% | 1016 mb (30 in) | WNW 13 kph (WNW 8.1 mph) | - | 10SM |
| | KSFZ 231035Z 29007KT 10SM CLR M10/M16 A3001 RMK AO1 |
| 05:15 EST |  Clear | -10°C / 14°F | -16°C / 3°F | 62% | 1016 mb (30 in) | WNW 13 kph (WNW 8.1 mph) | - | 10SM |
| | KSFZ 231015Z 29007KT 10SM CLR M10/M16 A3001 RMK AO1 |
| 04:55 EST |  Clear | -10°C / 14°F | -16°C / 3°F | 62% | 1016 mb (30 in) | NW 15 kph (NW 9.2 mph) | - | 10SM |
| | KSFZ 230955Z 30008KT 10SM CLR M10/M16 A3001 RMK AO1 |
| 04:35 EST |  Clear | -10°C / 14°F | -16°C / 3°F | 62% | 1016 mb (30 in) | WNW 13 kph (WNW 8.1 mph) | - | 10SM |
| | KSFZ 230935Z 29007KT 10SM CLR M10/M16 A3001 RMK AO1 |
| 04:15 EST |  Clear | -10°C / 14°F | -16°C / 3°F | 62% | 1016 mb (30 in) | W 19 kph (W 11.5 mph) | - | 10SM |
| | KSFZ 230915Z 28010KT 10SM CLR M10/M16 A3001 RMK AO1 |
| 03:55 EST |  Clear | -10°C / 14°F | -15°C / 5°F | 67% | 1016 mb (30 in) | NW 15 kph (NW 9.2 mph) | - | 10SM |
| | KSFZ 230855Z 30008KT 10SM CLR M10/M15 A3001 RMK AO1 52003 |
| 03:35 EST |  Clear | -11°C / 12°F | -15°C / 5°F | 73% | 1016 mb (30 in) | NW 11 kph (NW 6.9 mph) | - | 10SM |
| | KSFZ 230835Z 30006KT 10SM CLR M11/M15 A3001 RMK AO1 |
| 03:15 EST |  Clear | -11°C / 12°F | -16°C / 3°F | 67% | 1016 mb (30 in) | W 7 kph (W 4.6 mph) | - | 10SM |
| | KSFZ 230815Z 28004KT 10SM CLR M11/M16 A3001 RMK AO1 |
| 02:55 EST |  Clear | -11°C / 12°F | -16°C / 3°F | 67% | 1017 mb (30.03 in) | W 9 kph (W 5.8 mph) | - | 10SM |
| | KSFZ 230755Z 28005KT 10SM CLR M11/M16 A3002 RMK AO1 |
| 02:35 EST |  Clear | -11°C / 12°F | -16°C / 3°F | 67% | 1016 mb (30 in) | W 11 kph (W 6.9 mph) | - | 10SM |
| | KSFZ 230735Z 28006KT 10SM CLR M11/M16 A3001 RMK AO1 |
| 02:15 EST |  Clear | -11°C / 12°F | -17°C / 1°F | 62% | 1016 mb (30 in) | WNW 9 kph (WNW 5.8 mph) | - | 10SM |
| | KSFZ 230715Z 29005KT 10SM CLR M11/M17 A3001 RMK AO1 |
| 01:55 EST |  Clear | -10°C / 14°F | -16°C / 3°F | 62% | 1016 mb (30 in) | WNW 11 kph (WNW 6.9 mph) | - | 10SM |
| | KSFZ 230655Z 29006KT 10SM CLR M10/M16 A3001 RMK AO1 |
| 01:35 EST |  Clear | -9°C / 16°F | -17°C / 1°F | 53% | 1016 mb (30 in) | WNW 15 kph (WNW 9.2 mph) | - | 10SM |
| | KSFZ 230635Z 29008KT 10SM CLR M09/M17 A3001 RMK AO1 |
| 01:15 EST |  Clear | -9°C / 16°F | -16°C / 3°F | 57% | 1016 mb (30 in) | WNW 17 kph (WNW 10.4 mph) | - | 10SM |
| | KSFZ 230615Z 29009KT 10SM CLR M09/M16 A3000 RMK AO1 |
| 00:55 EST |  Clear | -9°C / 16°F | -16°C / 3°F | 57% | 1016 mb (30 in) | WNW 19 kph (WNW 11.5 mph) | - | 10SM |
| | KSFZ 230555Z 29010KT 10SM CLR M09/M16 A3000 RMK AO1 11040 21090 54000 |
| 00:35 EST |  Clear | -9°C / 16°F | -16°C / 3°F | 57% | 1016 mb (30 in) | WNW 15 kph (WNW 9.2 mph) | - | 10SM |
| | KSFZ 230535Z 29008G16KT 10SM CLR M09/M16 A3000 RMK AO1 |
| 00:15 EST |  Clear | -9°C / 16°F | -16°C / 3°F | 57% | 1016 mb (30 in) | WNW 17 kph (WNW 10.4 mph) | - | 10SM |
| | KSFZ 230515Z 29009KT 10SM CLR M09/M16 A2999 RMK AO1 |