| 06:55 PST |  Clear | 0°C / 32°F | -2°C / 28°F | 87% | 1026 mb (30.3 in) | NNE 7 kph (NNE 4.6 mph) | - | 10SM |
| | KOTH 051455Z 02004KT 10SM CLR 00/M02 A3029 RMK AO1 54000 |
| 06:35 PST |  Clear | 1°C / 34°F | -2°C / 28°F | 81% | 1026 mb (30.3 in) | Calm | - | 10SM |
| | KOTH 051435Z 00000KT 10SM CLR 01/M02 A3029 RMK AO1 |
| 06:15 PST |  Clear | 1°C / 34°F | -2°C / 28°F | 81% | 1026 mb (30.3 in) | N 6 kph (N 3.5 mph) | - | 10SM |
| | KOTH 051415Z 01003KT 10SM CLR 01/M02 A3029 RMK AO1 |
| 05:55 PST |  Clear | 1°C / 34°F | -1°C / 30°F | 87% | 1025 mb (30.27 in) | ESE 13 kph (ESE 8.1 mph) | - | 10SM |
| | KOTH 051355Z 11007KT 10SM CLR 01/M01 A3028 RMK AO1 |
| 05:35 PST |  Clear | -1°C / 30°F | -3°C / 27°F | 86% | 1025 mb (30.27 in) | SSE 11 kph (SSE 6.9 mph) | - | 10SM |
| | KOTH 051335Z 16006KT 10SM CLR M01/M03 A3028 RMK AO1 |
| 05:15 PST |  Clear | -1°C / 30°F | -3°C / 27°F | 86% | 1025 mb (30.27 in) | SSE 11 kph (SSE 6.9 mph) | - | 10SM |
| | KOTH 051315Z 16006KT 10SM CLR M01/M03 A3028 RMK AO1 |
| 04:55 PST |  Clear | -1°C / 30°F | -4°C / 25°F | 80% | 1026 mb (30.3 in) | SE 9 kph (SE 5.8 mph) | - | 10SM |
| | KOTH 051255Z 14005KT 10SM CLR M01/M04 A3029 RMK AO1 |
| 04:35 PST |  Clear | -1°C / 30°F | -4°C / 25°F | 80% | 1025 mb (30.27 in) | SSE 9 kph (SSE 5.8 mph) | - | 10SM |
| | KOTH 051235Z 16005KT 10SM CLR M01/M04 A3028 RMK AO1 |
| 04:15 PST |  Clear | -1°C / 30°F | -3°C / 27°F | 86% | 1026 mb (30.3 in) | SSE 9 kph (SSE 5.8 mph) | - | 10SM |
| | KOTH 051215Z 16005KT 10SM CLR M01/M03 A3029 RMK AO1 |
| 03:55 PST |  Clear | -1°C / 30°F | -3°C / 27°F | 86% | 1026 mb (30.3 in) | SE 6 kph (SE 3.5 mph) | - | 10SM |
| | KOTH 051155Z 14003KT 10SM CLR M01/M03 A3029 RMK AO1 10030 21010 54000 |
| 03:35 PST |  Clear | -1°C / 30°F | -3°C / 27°F | 86% | 1026 mb (30.3 in) | SE 9 kph (SE 5.8 mph) | - | 10SM |
| | KOTH 051135Z 14005KT 10SM CLR M01/M03 A3029 RMK AO1 |
| 03:15 PST |  Clear | 0°C / 32°F | -2°C / 28°F | 87% | 1026 mb (30.3 in) | SE 7 kph (SE 4.6 mph) | - | 10SM |
| | KOTH 051115Z 14004KT 10SM CLR 00/M02 A3030 RMK AO1 |
| 02:55 PST |  Clear | 0°C / 32°F | -3°C / 27°F | 80% | 1026 mb (30.3 in) | SSE 9 kph (SSE 5.8 mph) | - | 10SM |
| | KOTH 051055Z 15005KT 10SM CLR 00/M03 A3030 RMK AO1 |
| 02:35 PST |  Clear | 0°C / 32°F | -2°C / 28°F | 87% | 1026 mb (30.3 in) | SSE 9 kph (SSE 5.8 mph) | - | 10SM |
| | KOTH 051035Z 16005KT 10SM CLR 00/M02 A3030 RMK AO1 |
| 02:15 PST |  Clear | 1°C / 34°F | -2°C / 28°F | 81% | 1026 mb (30.3 in) | SE 11 kph (SE 6.9 mph) | - | 10SM |
| | KOTH 051015Z 13006KT 10SM CLR 01/M02 A3029 RMK AO1 |
| 01:55 PST |  Partly Cloudy | 1°C / 34°F | -2°C / 28°F | 81% | 1026 mb (30.3 in) | SE 15 kph (SE 9.2 mph) | - | 10SM |
| | KOTH 050955Z 13008KT 10SM FEW038 01/M02 A3029 RMK AO1 |
| 01:35 PST |  Mostly Cloudy | 2°C / 36°F | -1°C / 30°F | 81% | 1026 mb (30.3 in) | SE 13 kph (SE 8.1 mph) | - | 10SM |
| | KOTH 050935Z 14007KT 10SM BKN038 BKN048 02/M01 A3029 RMK AO1 |
| 01:15 PST |  Mostly Cloudy | 1°C / 34°F | -2°C / 28°F | 81% | 1026 mb (30.3 in) | SE 13 kph (SE 8.1 mph) | - | 10SM |
| | KOTH 050915Z 13007KT 10SM BKN048 01/M02 A3029 RMK AO1 |
| 00:55 PST |  Partly Cloudy | 1°C / 34°F | -1°C / 30°F | 87% | 1026 mb (30.3 in) | SE 11 kph (SE 6.9 mph) | - | 10SM |
| | KOTH 050855Z 14006KT 10SM FEW050 01/M01 A3029 RMK AO1 54000 |
| 00:35 PST |  Clear | 1°C / 34°F | -2°C / 28°F | 81% | 1026 mb (30.3 in) | SE 13 kph (SE 8.1 mph) | - | 10SM |
| | KOTH 050835Z 14007KT 10SM CLR 01/M02 A3029 RMK AO1 |
| 00:15 PST |  Partly Cloudy | 1°C / 34°F | -1°C / 30°F | 87% | 1026 mb (30.3 in) | SE 11 kph (SE 6.9 mph) | - | 10SM |
| | KOTH 050815Z 14006KT 10SM FEW037 01/M01 A3030 RMK AO1 |