| 10:56 PST |  Overcast Hazy | 6°C / 43°F | 3°C / 37°F | 81% | 1026 mb (30.3 in) | Variable 7 kph (Variable 4.6 mph) | - | 1/4SM |
| | KSMP 291856Z AUTO VRB04KT 1/4SM HZ BKN001 OVC006 06/03 A3031 RMK AO2 SLP277 T00560028 TSNO $ |
| 09:56 PST |  Overcast Hazy | 6°C / 43°F | 3°C / 37°F | 81% | 1026 mb (30.3 in) | Variable 9 kph (Variable 5.8 mph) | 0.25 mm (0.01 in) | 1/4SM |
| | KSMP 291756Z AUTO VRB05KT 1/4SM HZ BKN001 OVC010 06/03 A3031 RMK AO2 RAE1659 SLP276 P0001 60007 T00560028 10056 20044 53008 TSNO $ |
| 08:56 PST |  Overcast Light Rain | 5°C / 41°F | 2°C / 36°F | 81% | 1026 mb (30.3 in) | Variable 7 kph (Variable 4.6 mph) | 0.51 mm (0.02 in) | 1/4SM |
| | KSMP 291656Z AUTO VRB04KT 1/4SM -RA OVC001 05/02 A3030 RMK AO2 RAB49 SLP274 P0002 T00500022 TSNO $ |
| 07:56 PST |  Overcast Hazy | 5°C / 41°F | 2°C / 36°F | 81% | 1026 mb (30.3 in) | SSW 7 kph (SSW 4.6 mph) | 0.25 mm (0.01 in) | 1/4SM |
| | KSMP 291556Z AUTO 26004KT 1/4SM HZ BKN001 OVC012 05/02 A3029 RMK AO2 SLP269 P0001 T00500022 TSNO $ |
| 07:53 PST |  Overcast Hazy | 5°C / 41°F | 2°C / 36°F | 81% | 1026 mb (30.3 in) | Calm | 0.25 mm (0.01 in) | 1/4SM |
| | KSMP 291553Z AUTO 00000KT 1/4SM HZ BKN001 OVC012 05/02 A3029 RMK AO2 P0001 TSNO $ |
| 06:56 PST |  Overcast Hazy | 5°C / 41°F | 2°C / 36°F | 81% | 1025 mb (30.27 in) | Variable 7 kph (Variable 4.6 mph) | 0.25 mm (0.01 in) | 1/2SM |
| | KSMP 291456Z AUTO VRB04KT 1/2SM HZ BKN001 OVC010 05/02 A3028 RMK AO2 SLP267 P0001 60003 T00500022 56003 TSNO $ |
| 06:44 PST |  Overcast Hazy | 5°C / 41°F | 2°C / 36°F | 81% | 1025 mb (30.27 in) | SSW 7 kph (SSW 4.6 mph) | 0.25 mm (0.01 in) | 1/2SM |
| | KSMP 291444Z AUTO 26004KT 1/2SM HZ BKN001 OVC008 05/02 A3028 RMK AO2 P0001 TSNO $ |
| 06:29 PST |  Obscured Fog | 4°C / 39°F | 2°C / 36°F | 87% | 1025 mb (30.27 in) | Variable 7 kph (Variable 4.6 mph) | 0.25 mm (0.01 in) | 1/4SM |
| | KSMP 291429Z AUTO VRB04KT 1/4SM FG VV001 04/02 A3028 RMK AO2 P0001 TSNO $ |
| 06:18 PST |  Obscured Hazy | 5°C / 41°F | 2°C / 36°F | 81% | 1025 mb (30.27 in) | Variable 7 kph (Variable 4.6 mph) | - | 1/2SM |
| | KSMP 291418Z AUTO VRB04KT 1/2SM HZ VV001 05/02 A3028 RMK AO2 TSNO $ |
| 05:56 PST |  Obscured Fog | 4°C / 39°F | 2°C / 36°F | 87% | 1025 mb (30.27 in) | Variable 7 kph (Variable 4.6 mph) | 0.25 mm (0.01 in) | 1/4SM |
| | KSMP 291356Z AUTO VRB04KT 1/4SM FG VV001 04/02 A3028 RMK AO2 SLP269 P0001 T00440022 TSNO $ |
| 05:42 PST |  Obscured Fog | 4°C / 39°F | 2°C / 36°F | 87% | 1025 mb (30.27 in) | Variable 9 kph (Variable 5.8 mph) | 0.25 mm (0.01 in) | 1/4SM |
| | KSMP 291342Z AUTO VRB05KT 1/4SM FG VV001 04/02 A3028 RMK AO2 P0001 TSNO $ |
| 05:11 PST |  Overcast Hazy | 4°C / 39°F | 2°C / 36°F | 87% | 1025 mb (30.27 in) | SSW 13 kph (SSW 8.1 mph) | - | 1/2SM |
| | KSMP 291311Z AUTO 25007KT 1/2SM HZ OVC001 04/02 A3028 RMK AO2 TSNO $ |
| 04:56 PST |  Overcast Hazy | 4°C / 39°F | 2°C / 36°F | 87% | 1025 mb (30.27 in) | Variable 7 kph (Variable 4.6 mph) | 0.25 mm (0.01 in) | 1/4SM |
| | KSMP 291256Z AUTO VRB04KT 1/4SM HZ OVC001 04/02 A3028 RMK AO2 SLP270 P0001 T00440017 TSNO $ |
| 03:56 PST |  Overcast Hazy | 4°C / 39°F | 2°C / 36°F | 87% | 1026 mb (30.3 in) | Calm | 0.25 mm (0.01 in) | 1/4SM |
| | KSMP 291156Z AUTO 00000KT 1/4SM HZ BKN001 OVC009 04/02 A3029 RMK AO2 SLP272 P0001 60005 70043 T00440017 10044 20039 51003 TSNO $ |
| 02:56 PST |  Obscured Hazy | 4°C / 39°F | 2°C / 36°F | 87% | 1026 mb (30.3 in) | Variable 7 kph (Variable 4.6 mph) | 0.25 mm (0.01 in) | 1/4SM |
| | KSMP 291056Z AUTO VRB04KT 1/4SM HZ VV001 04/02 A3029 RMK AO2 SLP272 P0001 T00440017 TSNO $ |
| 01:56 PST |  Obscured Hazy | 4°C / 39°F | 1°C / 34°F | 81% | 1026 mb (30.3 in) | SSW 15 kph (SSW 9.2 mph) | 0.25 mm (0.01 in) | 1/4SM |
| | KSMP 290956Z AUTO 24008KT 170V290 1/4SM HZ VV001 04/01 A3030 RMK AO2 SLP275 P0001 T00390011 TSNO $ |
| 00:56 PST |  Obscured Hazy | 4°C / 39°F | 1°C / 34°F | 81% | 1025 mb (30.27 in) | W 13 kph (W 8.1 mph) | 0.25 mm (0.01 in) | 1/4SM |
| | KSMP 290856Z AUTO 27007KT 230V310 1/4SM HZ VV001 04/01 A3028 RMK AO2 SLP269 P0001 60002 T00390011 58007 TSNO $ |
| 00:39 PST |  Obscured Hazy | 4°C / 39°F | 1°C / 34°F | 81% | 1025 mb (30.27 in) | Variable 11 kph (Variable 6.9 mph) | 0.25 mm (0.01 in) | 1/4SM |
| | KSMP 290839Z AUTO VRB06KT 1/4SM HZ VV001 04/01 A3027 RMK AO2 P0001 TSNO $ |
| 00:27 PST |  Obscured Hazy | 4°C / 39°F | 2°C / 36°F | 87% | 1025 mb (30.27 in) | Variable 9 kph (Variable 5.8 mph) | 0.25 mm (0.01 in) | 1/2SM |
| | KSMP 290827Z AUTO VRB05KT 1/2SM HZ VV001 04/02 A3027 RMK AO2 P0001 TSNO $ |