| 18:35 EST |  Overcast | 1°C / 34°F | -1°C / 30°F | 87% | 1030 mb (30.42 in) | E 7 kph (E 4.6 mph) | - | 7SM |
| | KSFZ 252335Z 08004KT 7SM OVC011 01/M01 A3041 RMK AO1 |
| 18:15 EST |  Overcast | 1°C / 34°F | -1°C / 30°F | 87% | 1030 mb (30.42 in) | E 6 kph (E 3.5 mph) | - | 10SM |
| | KSFZ 252315Z 08003KT 10SM OVC011 01/M01 A3041 RMK AO1 |
| 17:55 EST |  Overcast | 1°C / 34°F | -1°C / 30°F | 87% | 1030 mb (30.42 in) | ENE 6 kph (ENE 3.5 mph) | - | 10SM |
| | KSFZ 252255Z 07003KT 10SM OVC013 01/M01 A3041 RMK AO1 |
| 17:35 EST |  Overcast | 1°C / 34°F | -1°C / 30°F | 87% | 1029 mb (30.39 in) | NE 6 kph (NE 3.5 mph) | - | 10SM |
| | KSFZ 252235Z 05003KT 10SM OVC013 01/M01 A3040 RMK AO1 |
| 17:15 EST |  Overcast | 1°C / 34°F | -1°C / 30°F | 87% | 1029 mb (30.39 in) | E 6 kph (E 3.5 mph) | - | 10SM |
| | KSFZ 252215Z 08003KT 10SM OVC013 01/M01 A3038 RMK AO1 |
| 16:55 EST |  Overcast | 1°C / 34°F | -1°C / 30°F | 87% | 1029 mb (30.39 in) | ENE 9 kph (ENE 5.8 mph) | - | 10SM |
| | KSFZ 252155Z 07005KT 10SM OVC013 01/M01 A3038 RMK AO1 |
| 16:35 EST |  Overcast | 2°C / 36°F | -2°C / 28°F | 75% | 1029 mb (30.39 in) | E 6 kph (E 3.5 mph) | - | 10SM |
| | KSFZ 252135Z 08003KT 10SM OVC013 02/M02 A3039 RMK AO1 |
| 16:15 EST |  Overcast | 2°C / 36°F | -2°C / 28°F | 75% | 1028 mb (30.36 in) | E 9 kph (E 5.8 mph) | - | 10SM |
| | KSFZ 252115Z 08005KT 10SM OVC013 02/M02 A3037 RMK AO1 |
| 15:55 EST |  Overcast | 1°C / 34°F | -1°C / 30°F | 87% | 1028 mb (30.36 in) | E 11 kph (E 6.9 mph) | - | 10SM |
| | KSFZ 252055Z 08006KT 10SM OVC013 01/M01 A3036 RMK AO1 57010 |
| 15:35 EST |  Overcast | 2°C / 36°F | -1°C / 30°F | 81% | 1029 mb (30.39 in) | E 11 kph (E 6.9 mph) | - | 10SM |
| | KSFZ 252035Z 09006KT 10SM OVC013 02/M01 A3039 RMK AO1 |
| 15:15 EST |  Overcast | 2°C / 36°F | -1°C / 30°F | 81% | 1029 mb (30.39 in) | E 11 kph (E 6.9 mph) | - | 10SM |
| | KSFZ 252015Z 10006KT 10SM OVC015 02/M01 A3038 RMK AO1 |
| 14:55 EST |  Overcast | 2°C / 36°F | -2°C / 28°F | 75% | 1028 mb (30.36 in) | E 9 kph (E 5.8 mph) | - | 10SM |
| | KSFZ 251955Z 08005KT 10SM OVC015 02/M02 A3037 RMK AO1 |
| 14:35 EST |  Overcast | 2°C / 36°F | -1°C / 30°F | 81% | 1029 mb (30.39 in) | ESE 11 kph (ESE 6.9 mph) | - | 10SM |
| | KSFZ 251935Z 11006KT 10SM OVC015 02/M01 A3038 RMK AO1 |
| 14:15 EST |  Overcast | 2°C / 36°F | -2°C / 28°F | 75% | 1028 mb (30.36 in) | E 13 kph (E 8.1 mph) | - | 10SM |
| | KSFZ 251915Z 10007KT 10SM OVC017 02/M02 A3036 RMK AO1 |
| 13:55 EST |  Overcast | 2°C / 36°F | -2°C / 28°F | 75% | 1028 mb (30.36 in) | E 9 kph (E 5.8 mph) | - | 10SM |
| | KSFZ 251855Z 08005KT 10SM OVC019 02/M02 A3037 RMK AO1 |
| 13:35 EST |  Overcast | 2°C / 36°F | -2°C / 28°F | 75% | 1029 mb (30.39 in) | E 15 kph (E 9.2 mph) | - | 10SM |
| | KSFZ 251835Z 10008KT 10SM OVC021 02/M02 A3038 RMK AO1 |
| 13:15 EST |  Overcast | 3°C / 37°F | -2°C / 28°F | 70% | 1029 mb (30.39 in) | ESE 15 kph (ESE 9.2 mph) | - | 10SM |
| | KSFZ 251815Z 11008KT 10SM OVC021 03/M02 A3038 RMK AO1 |
| 12:55 EST |  Overcast | 3°C / 37°F | -2°C / 28°F | 70% | 1029 mb (30.39 in) | E 6 kph (E 3.5 mph) | - | 10SM |
| | KSFZ 251755Z 08003KT 10SM OVC021 03/M02 A3039 RMK AO1 10030 21050 57010 |
| 12:35 EST |  Partly Cloudy | 3°C / 37°F | -2°C / 28°F | 70% | 1029 mb (30.39 in) | E 9 kph (E 5.8 mph) | - | 10SM |
| | KSFZ 251735Z 10005KT 10SM SCT021 03/M02 A3039 RMK AO1 |
| 12:15 EST |  Partly Cloudy | 2°C / 36°F | -2°C / 28°F | 75% | 1029 mb (30.39 in) | NE 7 kph (NE 4.6 mph) | - | 10SM |
| | KSFZ 251715Z 03004KT 10SM FEW021 02/M02 A3039 RMK AO1 |
| 11:55 EST |  Partly Cloudy | 2°C / 36°F | -2°C / 28°F | 75% | 1029 mb (30.39 in) | NE 7 kph (NE 4.6 mph) | - | 10SM |
| | KSFZ 251655Z 03004KT 10SM FEW021 02/M02 A3040 RMK AO1 |
| 11:35 EST |  Clear | 2°C / 36°F | -2°C / 28°F | 75% | 1030 mb (30.42 in) | NNE 6 kph (NNE 3.5 mph) | - | 10SM |
| | KSFZ 251635Z 02003KT 10SM CLR 02/M02 A3041 RMK AO1 |
| 11:15 EST |  Partly Cloudy | 1°C / 34°F | -3°C / 27°F | 75% | 1030 mb (30.42 in) | NE 11 kph (NE 6.9 mph) | - | 10SM |
| | KSFZ 251615Z 03006KT 10SM FEW018 01/M03 A3041 RMK AO1 |
| 10:55 EST |  Mostly Cloudy | 1°C / 34°F | -3°C / 27°F | 75% | 1030 mb (30.42 in) | NE 11 kph (NE 6.9 mph) | - | 10SM |
| | KSFZ 251555Z 04006KT 10SM BKN018 01/M03 A3042 RMK AO1 |
| 10:35 EST |  Partly Cloudy | 0°C / 32°F | -3°C / 27°F | 80% | 1030 mb (30.42 in) | NE 7 kph (NE 4.6 mph) | - | 10SM |
| | KSFZ 251535Z 03004KT 10SM SCT018 00/M03 A3043 RMK AO1 |
| 10:15 EST |  Partly Cloudy | -1°C / 30°F | -3°C / 27°F | 86% | 1030 mb (30.42 in) | NE 6 kph (NE 3.5 mph) | - | 10SM |
| | KSFZ 251515Z 04003KT 10SM FEW018 M01/M03 A3043 RMK AO1 |
| 09:55 EST |  Clear | -2°C / 28°F | -4°C / 25°F | 86% | 1030 mb (30.42 in) | NE 6 kph (NE 3.5 mph) | - | 10SM |
| | KSFZ 251455Z 04003KT 10SM CLR M02/M04 A3042 RMK AO1 52003 |
| 09:35 EST |  Clear | -2°C / 28°F | -4°C / 25°F | 86% | 1030 mb (30.42 in) | NE 11 kph (NE 6.9 mph) | - | 10SM |
| | KSFZ 251435Z 05006KT 10SM CLR M02/M04 A3041 RMK AO1 |
| 09:15 EST |  Clear | -2°C / 28°F | -4°C / 25°F | 86% | 1030 mb (30.42 in) | NE 11 kph (NE 6.9 mph) | - | 10SM |
| | KSFZ 251415Z 04006KT 10SM CLR M02/M04 A3041 RMK AO1 |
| 08:55 EST |  Clear | -3°C / 27°F | -5°C / 23°F | 86% | 1030 mb (30.42 in) | NE 13 kph (NE 8.1 mph) | - | 10SM |
| | KSFZ 251355Z 03007KT 10SM CLR M03/M05 A3041 RMK AO1 |
| 08:35 EST |  Clear | -3°C / 27°F | -5°C / 23°F | 86% | 1030 mb (30.42 in) | NE 13 kph (NE 8.1 mph) | - | 10SM |
| | KSFZ 251335Z 03007KT 10SM CLR M03/M05 A3041 RMK AO1 |
| 08:15 EST |  Clear | -3°C / 27°F | -6°C / 21°F | 80% | 1030 mb (30.42 in) | NE 13 kph (NE 8.1 mph) | - | 10SM |
| | KSFZ 251315Z 04007KT 10SM CLR M03/M06 A3041 RMK AO1 |
| 07:55 EST |  Clear | -4°C / 25°F | -6°C / 21°F | 86% | 1030 mb (30.42 in) | NE 11 kph (NE 6.9 mph) | - | 10SM |
| | KSFZ 251255Z 03006KT 10SM CLR M04/M06 A3041 RMK AO1 |
| 07:35 EST |  Clear | -4°C / 25°F | -6°C / 21°F | 86% | 1030 mb (30.42 in) | NNE 9 kph (NNE 5.8 mph) | - | 10SM |
| | KSFZ 251235Z 02005KT 10SM CLR M04/M06 A3041 RMK AO1 |
| 07:15 EST |  Clear | -4°C / 25°F | -6°C / 21°F | 86% | 1030 mb (30.42 in) | N 6 kph (N 3.5 mph) | - | 10SM |
| | KSFZ 251215Z 36003KT 10SM CLR M04/M06 A3042 RMK AO1 |
| 06:55 EST |  Clear | -4°C / 25°F | -6°C / 21°F | 86% | 1030 mb (30.42 in) | N 7 kph (N 4.6 mph) | - | 10SM |
| | KSFZ 251155Z 01004KT 10SM CLR M04/M06 A3041 RMK AO1 11010 21050 52010 |
| 06:35 EST |  Clear | -4°C / 25°F | -6°C / 21°F | 86% | 1029 mb (30.39 in) | NNE 9 kph (NNE 5.8 mph) | - | 10SM |
| | KSFZ 251135Z 02005KT 10SM CLR M04/M06 A3040 RMK AO1 |
| 06:15 EST |  Clear | -4°C / 25°F | -5°C / 23°F | 93% | 1029 mb (30.39 in) | N 7 kph (N 4.6 mph) | - | 10SM |
| | KSFZ 251115Z 01004KT 10SM CLR M04/M05 A3039 RMK AO1 |
| 05:55 EST |  Clear | -4°C / 25°F | -6°C / 21°F | 86% | 1029 mb (30.39 in) | N 7 kph (N 4.6 mph) | - | 10SM |
| | KSFZ 251055Z 01004KT 10SM CLR M04/M06 A3039 RMK AO1 |
| 05:35 EST |  Clear | -4°C / 25°F | -6°C / 21°F | 86% | 1029 mb (30.39 in) | NNE 9 kph (NNE 5.8 mph) | - | 10SM |
| | KSFZ 251035Z 02005KT 10SM CLR M04/M06 A3039 RMK AO1 |
| 05:15 EST |  Clear | -5°C / 23°F | -7°C / 19°F | 86% | 1029 mb (30.39 in) | N 6 kph (N 3.5 mph) | - | 10SM |
| | KSFZ 251015Z 36003KT 10SM CLR M05/M07 A3040 RMK AO1 |
| 04:55 EST |  Clear | -4°C / 25°F | -6°C / 21°F | 86% | 1029 mb (30.39 in) | N 7 kph (N 4.6 mph) | - | 10SM |
| | KSFZ 250955Z 01004KT 10SM CLR M04/M06 A3039 RMK AO1 |
| 04:35 EST |  Clear | -4°C / 25°F | -6°C / 21°F | 86% | 1029 mb (30.39 in) | N 7 kph (N 4.6 mph) | - | 10SM |
| | KSFZ 250935Z 36004KT 10SM CLR M04/M06 A3039 RMK AO1 |
| 04:15 EST |  Clear | -3°C / 27°F | -6°C / 21°F | 80% | 1029 mb (30.39 in) | N 9 kph (N 5.8 mph) | - | 10SM |
| | KSFZ 250915Z 01005KT 10SM CLR M03/M06 A3039 RMK AO1 |
| 03:55 EST |  Clear | -3°C / 27°F | -5°C / 23°F | 86% | 1029 mb (30.39 in) | NE 11 kph (NE 6.9 mph) | - | 10SM |
| | KSFZ 250855Z 03006KT 10SM CLR M03/M05 A3038 RMK AO1 57007 |
| 03:35 EST |  Clear | -3°C / 27°F | -5°C / 23°F | 86% | 1029 mb (30.39 in) | NNE 11 kph (NNE 6.9 mph) | - | 10SM |
| | KSFZ 250835Z 02006KT 10SM CLR M03/M05 A3039 RMK AO1 |
| 03:15 EST |  Clear | -3°C / 27°F | -6°C / 21°F | 80% | 1029 mb (30.39 in) | N 9 kph (N 5.8 mph) | - | 10SM |
| | KSFZ 250815Z 01005KT 10SM CLR M03/M06 A3040 RMK AO1 |
| 02:55 EST |  Partly Cloudy | -3°C / 27°F | -5°C / 23°F | 86% | 1029 mb (30.39 in) | N 9 kph (N 5.8 mph) | - | 10SM |
| | KSFZ 250755Z 01005KT 10SM FEW023 M03/M05 A3039 RMK AO1 |
| 02:35 EST |  Mostly Cloudy | -3°C / 27°F | -5°C / 23°F | 86% | 1029 mb (30.39 in) | N 9 kph (N 5.8 mph) | - | 10SM |
| | KSFZ 250735Z 01005KT 10SM BKN023 M03/M05 A3040 RMK AO1 |
| 02:15 EST |  Mostly Cloudy | -2°C / 28°F | -5°C / 23°F | 80% | 1029 mb (30.39 in) | NNE 9 kph (NNE 5.8 mph) | - | 10SM |
| | KSFZ 250715Z 02005KT 10SM BKN023 M02/M05 A3040 RMK AO1 |
| 01:55 EST |  Mostly Cloudy | -2°C / 28°F | -4°C / 25°F | 86% | 1029 mb (30.39 in) | NE 11 kph (NE 6.9 mph) | - | 10SM |
| | KSFZ 250655Z 03006KT 10SM BKN023 M02/M04 A3039 RMK AO1 |
| 01:35 EST |  Overcast | -1°C / 30°F | -4°C / 25°F | 80% | 1029 mb (30.39 in) | N 9 kph (N 5.8 mph) | - | 10SM |
| | KSFZ 250635Z 01005KT 10SM OVC025 M01/M04 A3039 RMK AO1 |
| 01:15 EST |  Overcast | -1°C / 30°F | -4°C / 25°F | 80% | 1029 mb (30.39 in) | N 7 kph (N 4.6 mph) | - | 10SM |
| | KSFZ 250615Z 01004KT 10SM OVC025 M01/M04 A3039 RMK AO1 |
| 00:55 EST |  Overcast | -1°C / 30°F | -4°C / 25°F | 80% | 1029 mb (30.39 in) | N 9 kph (N 5.8 mph) | - | 10SM |
| | KSFZ 250555Z 01005KT 10SM OVC025 M01/M04 A3040 RMK AO1 10000 21030 52010 |
| 00:35 EST |  Overcast | -1°C / 30°F | -4°C / 25°F | 80% | 1029 mb (30.39 in) | N 6 kph (N 3.5 mph) | - | 10SM |
| | KSFZ 250535Z 35003KT 10SM OVC025 M01/M04 A3040 RMK AO1 |
| 00:15 EST |  Overcast | -1°C / 30°F | -4°C / 25°F | 80% | 1029 mb (30.39 in) | N 7 kph (N 4.6 mph) | - | 10SM |
| | KSFZ 250515Z 35004KT 10SM OVC025 M01/M04 A3040 RMK AO1 |