NDBC has recently revised the NDBC Handbook of Automated Data Quality Control Checks and Procedures. The new document can be found on our Publications page.
Station APNM4 - Alpena Harbor Light, Alpena, MI 
Previous observations
TIME (EDT) |
 WDIR |
 WSPD kts |
 GST kts |
 WVHT ft |
 DPD sec |
 APD sec |
 MWD |
 PRES in |
 PTDY in |
 ATMP °F |
 WTMP °F |
 DEWP °F |
 SAL psu |
 VIS nmi |
 TIDE ft |
2025-04-22 02:10 pm | WNW | 11 | 15 | - | - | - | - | - | - | 53.1 | - | - | - | - | - |
2025-04-22 02:00 pm | WNW | 10 | 13 | - | - | - | - | - | - | 53.1 | - | - | - | - | - |
2025-04-22 01:50 pm | NW | 8 | 13 | - | - | - | - | - | - | 52.3 | - | - | - | - | - |
2025-04-22 01:40 pm | NW | 16 | 20 | - | - | - | - | - | - | 52.0 | - | - | - | - | - |
2025-04-22 01:30 pm | WNW | 14 | 18 | - | - | - | - | - | - | 52.0 | - | - | - | - | - |
2025-04-22 01:20 pm | NW | 9 | 14 | - | - | - | - | - | - | 52.0 | - | - | - | - | - |
2025-04-22 01:10 pm | NW | 14 | 21 | - | - | - | - | - | - | 51.1 | - | - | - | - | - |
2025-04-22 01:00 pm | WNW | 14 | 19 | - | - | - | - | - | - | 51.1 | - | - | - | - | - |
2025-04-22 12:50 pm | WNW | 10 | 13 | - | - | - | - | - | - | 50.7 | - | - | - | - | - |
2025-04-22 12:40 pm | NW | 11 | 17 | - | - | - | - | - | - | 50.4 | - | - | - | - | - |
2025-04-22 12:30 pm | NW | 14 | 18 | - | - | - | - | - | - | 49.8 | - | - | - | - | - |
2025-04-22 12:20 pm | WNW | 14 | 17 | - | - | - | - | - | - | 49.5 | - | - | - | - | - |
2025-04-22 12:10 pm | NW | 16 | 22 | - | - | - | - | - | - | 49.3 | - | - | - | - | - |
2025-04-22 12:00 pm | NW | 15 | 20 | - | - | - | - | - | - | 48.7 | - | - | - | - | - |
2025-04-22 11:50 am | NW | 14 | 19 | - | - | - | - | - | - | 48.4 | - | - | - | - | - |
2025-04-22 11:40 am | WNW | 11 | 16 | - | - | - | - | - | - | 48.0 | - | - | - | - | - |
2025-04-22 11:30 am | NW | 11 | 16 | - | - | - | - | - | - | 47.1 | - | - | - | - | - |
2025-04-22 11:20 am | NW | 14 | 18 | - | - | - | - | - | - | 46.4 | - | - | - | - | - |
2025-04-22 11:10 am | WNW | 12 | 15 | - | - | - | - | - | - | 46.0 | - | - | - | - | - |
2025-04-22 11:00 am | WNW | 15 | 18 | - | - | - | - | - | - | 45.3 | - | - | - | - | - |
2025-04-22 10:50 am | WNW | 14 | 17 | - | - | - | - | - | - | 45.5 | - | - | - | - | - |
2025-04-22 10:40 am | WNW | 8 | 12 | - | - | - | - | - | - | 45.1 | - | - | - | - | - |
2025-04-22 10:30 am | NW | 15 | 18 | - | - | - | - | - | - | 44.2 | - | - | - | - | - |
2025-04-22 10:20 am | WNW | 12 | 15 | - | - | - | - | - | - | 43.7 | - | - | - | - | - |
2025-04-22 10:10 am | WNW | 12 | 17 | - | - | - | - | - | - | 43.3 | - | - | - | - | - |
2025-04-22 10:00 am | NNW | 9 | 13 | - | - | - | - | - | - | 42.8 | - | - | - | - | - |
2025-04-22 09:50 am | NW | 11 | 14 | - | - | - | - | - | - | 42.6 | - | - | - | - | - |
2025-04-22 09:40 am | NW | 14 | 17 | - | - | - | - | - | - | 41.7 | - | - | - | - | - |
2025-04-22 09:30 am | WNW | 12 | 16 | - | - | - | - | - | - | 41.7 | - | - | - | - | - |
2025-04-22 09:20 am | WNW | 11 | 15 | - | - | - | - | - | - | 41.5 | - | - | - | - | - |
2025-04-22 09:10 am | WNW | 11 | 14 | - | - | - | - | - | - | 41.2 | - | - | - | - | - |
2025-04-22 09:00 am | WNW | 10 | 13 | - | - | - | - | - | - | 41.0 | - | - | - | - | - |
2025-04-22 08:50 am | WNW | 10 | 16 | - | - | - | - | - | - | 40.6 | - | - | - | - | - |
2025-04-22 08:40 am | WNW | 14 | 19 | - | - | - | - | - | - | 40.3 | - | - | - | - | - |
2025-04-22 08:30 am | WNW | 12 | 16 | - | - | - | - | - | - | 40.1 | - | - | - | - | - |
2025-04-22 08:20 am | WNW | 14 | 17 | - | - | - | - | - | - | 40.1 | - | - | - | - | - |
2025-04-22 08:10 am | WNW | 11 | 13 | - | - | - | - | - | - | 39.7 | - | - | - | - | - |
2025-04-22 08:00 am | WNW | 9 | 11 | - | - | - | - | - | - | 39.9 | - | - | - | - | - |
2025-04-22 07:50 am | WNW | 11 | 14 | - | - | - | - | - | - | 39.7 | - | - | - | - | - |
2025-04-22 07:40 am | W | 9 | 11 | - | - | - | - | - | - | 39.6 | - | - | - | - | - |
2025-04-22 07:30 am | W | 11 | 16 | - | - | - | - | - | - | 39.2 | - | - | - | - | - |
2025-04-22 07:20 am | WNW | 12 | 17 | - | - | - | - | - | - | 39.0 | - | - | - | - | - |
2025-04-22 07:10 am | WNW | 10 | 14 | - | - | - | - | - | - | 39.0 | - | - | - | - | - |
2025-04-22 07:00 am | WNW | 12 | 16 | - | - | - | - | - | - | 38.8 | - | - | - | - | - |
2025-04-22 06:50 am | WNW | 14 | 20 | - | - | - | - | - | - | 38.8 | - | - | - | - | - |
2025-04-22 06:40 am | WNW | 12 | 16 | - | - | - | - | - | - | 38.8 | - | - | - | - | - |
2025-04-22 06:30 am | WNW | 13 | 19 | - | - | - | - | - | - | 39.0 | - | - | - | - | - |
2025-04-22 06:20 am | WNW | 16 | 22 | - | - | - | - | - | - | 39.0 | - | - | - | - | - |
2025-04-22 06:10 am | WNW | 16 | 21 | - | - | - | - | - | - | 39.0 | - | - | - | - | - |
2025-04-22 06:00 am | WNW | 17 | 20 | - | - | - | - | - | - | 39.0 | - | - | - | - | - |
2025-04-22 05:50 am | WNW | 15 | 20 | - | - | - | - | - | - | 39.0 | - | - | - | - | - |
2025-04-22 05:40 am | WNW | 18 | 26 | - | - | - | - | - | - | 38.8 | - | - | - | - | - |
2025-04-22 05:30 am | WNW | 19 | 25 | - | - | - | - | - | - | 38.8 | - | - | - | - | - |
2025-04-22 05:20 am | WNW | 21 | 25 | - | - | - | - | - | - | 39.0 | - | - | - | - | - |
2025-04-22 05:10 am | WNW | 16 | 20 | - | - | - | - | - | - | 39.0 | - | - | - | - | - |
2025-04-22 05:00 am | WNW | 18 | 26 | - | - | - | - | - | - | 38.8 | - | - | - | - | - |
2025-04-22 04:50 am | W | 12 | 18 | - | - | - | - | - | - | 38.7 | - | - | - | - | - |
2025-04-22 04:40 am | W | 11 | 16 | - | - | - | - | - | - | 38.5 | - | - | - | - | - |
2025-04-22 04:30 am | WNW | 13 | 16 | - | - | - | - | - | - | 38.3 | - | - | - | - | - |
2025-04-22 04:20 am | WNW | 13 | 20 | - | - | - | - | - | - | 38.3 | - | - | - | - | - |
2025-04-22 04:10 am | W | 15 | 20 | - | - | - | - | - | - | 38.7 | - | - | - | - | - |
2025-04-22 04:00 am | WNW | 17 | 22 | - | - | - | - | - | - | 38.7 | - | - | - | - | - |
2025-04-22 03:50 am | WNW | 18 | 20 | - | - | - | - | - | - | 38.8 | - | - | - | - | - |
2025-04-22 03:40 am | WNW | 15 | 20 | - | - | - | - | - | - | 39.0 | - | - | - | - | - |
2025-04-22 03:30 am | W | 10 | 17 | - | - | - | - | - | - | 39.0 | - | - | - | - | - |
2025-04-22 03:20 am | WNW | 16 | 20 | - | - | - | - | - | - | 39.0 | - | - | - | - | - |
2025-04-22 03:10 am | WNW | 19 | 25 | - | - | - | - | - | - | 39.0 | - | - | - | - | - |
2025-04-22 03:00 am | WNW | 11 | 15 | - | - | - | - | - | - | 39.0 | - | - | - | - | - |
2025-04-22 02:50 am | W | 10 | 14 | - | - | - | - | - | - | 38.8 | - | - | - | - | - |
2025-04-22 02:40 am | W | 6 | 8 | - | - | - | - | - | - | 39.0 | - | - | - | - | - |
2025-04-22 02:30 am | WNW | 13 | 16 | - | - | - | - | - | - | 39.0 | - | - | - | - | - |
2025-04-22 02:20 am | WNW | 13 | 19 | - | - | - | - | - | - | 39.6 | - | - | - | - | - |
2025-04-22 02:10 am | W | 12 | 17 | - | - | - | - | - | - | 39.9 | - | - | - | - | - |
2025-04-22 02:00 am | W | 12 | 18 | - | - | - | - | - | - | 40.1 | - | - | - | - | - |
2025-04-22 01:50 am | W | 14 | 18 | - | - | - | - | - | - | 40.1 | - | - | - | - | - |
2025-04-22 01:40 am | W | 11 | 16 | - | - | - | - | - | - | 39.9 | - | - | - | - | - |
2025-04-22 01:30 am | WNW | 12 | 16 | - | - | - | - | - | - | 39.9 | - | - | - | - | - |
2025-04-22 01:20 am | W | 11 | 15 | - | - | - | - | - | - | 39.7 | - | - | - | - | - |
2025-04-22 01:10 am | W | 12 | 14 | - | - | - | - | - | - | 39.4 | - | - | - | - | - |
2025-04-22 01:00 am | W | 16 | 24 | - | - | - | - | - | - | 39.4 | - | - | - | - | - |
2025-04-22 12:50 am | W | 14 | 17 | - | - | - | - | - | - | 39.7 | - | - | - | - | - |
2025-04-22 12:40 am | W | 12 | 18 | - | - | - | - | - | - | 39.9 | - | - | - | - | - |
2025-04-22 12:30 am | W | 11 | 14 | - | - | - | - | - | - | 40.1 | - | - | - | - | - |
2025-04-22 12:20 am | W | 13 | 20 | - | - | - | - | - | - | 40.1 | - | - | - | - | - |
2025-04-22 12:10 am | W | 13 | 16 | - | - | - | - | - | - | 40.3 | - | - | - | - | - |
2025-04-22 12:00 am | WNW | 13 | 16 | - | - | - | - | - | - | 40.3 | - | - | - | - | - |
2025-04-21 11:50 pm | W | 12 | 16 | - | - | - | - | - | - | 40.5 | - | - | - | - | - |
2025-04-21 11:40 pm | W | 11 | 15 | - | - | - | - | - | - | 40.5 | - | - | - | - | - |
2025-04-21 11:30 pm | W | 12 | 16 | - | - | - | - | - | - | 40.6 | - | - | - | - | - |
2025-04-21 11:20 pm | W | 12 | 15 | - | - | - | - | - | - | 40.8 | - | - | - | - | - |
2025-04-21 11:10 pm | W | 14 | 18 | - | - | - | - | - | - | 40.8 | - | - | - | - | - |
2025-04-21 11:00 pm | W | 13 | 19 | - | - | - | - | - | - | 41.0 | - | - | - | - | - |
2025-04-21 10:50 pm | W | 16 | 21 | - | - | - | - | - | - | 41.2 | - | - | - | - | - |
2025-04-21 10:40 pm | W | 14 | 19 | - | - | - | - | - | - | 41.5 | - | - | - | - | - |
2025-04-21 10:30 pm | W | 19 | 26 | - | - | - | - | - | - | 41.7 | - | - | - | - | - |
2025-04-21 10:20 pm | W | 14 | 21 | - | - | - | - | - | - | 42.1 | - | - | - | - | - |
2025-04-21 10:10 pm | W | 18 | 26 | - | - | - | - | - | - | 42.4 | - | - | - | - | - |
2025-04-21 10:00 pm | W | 17 | 25 | - | - | - | - | - | - | 42.8 | - | - | - | - | - |
2025-04-21 09:50 pm | W | 20 | 27 | - | - | - | - | - | - | 43.3 | - | - | - | - | - |
2025-04-21 09:40 pm | W | 11 | 15 | - | - | - | - | - | - | 43.3 | - | - | - | - | - |
2025-04-21 09:30 pm | W | 11 | 14 | - | - | - | - | - | - | 43.5 | - | - | - | - | - |
2025-04-21 09:20 pm | W | 15 | 22 | - | - | - | - | - | - | 43.5 | - | - | - | - | - |
2025-04-21 09:10 pm | W | 15 | 21 | - | - | - | - | - | - | 43.5 | - | - | - | - | - |
2025-04-21 09:00 pm | W | 10 | 13 | - | - | - | - | - | - | 44.4 | - | - | - | - | - |
2025-04-21 08:50 pm | W | 8 | 12 | - | - | - | - | - | - | 44.4 | - | - | - | - | - |
2025-04-21 08:40 pm | W | 19 | 25 | - | - | - | - | - | - | 44.8 | - | - | - | - | - |
2025-04-21 08:30 pm | WSW | 20 | 27 | - | - | - | - | - | - | 45.5 | - | - | - | - | - |
2025-04-21 08:20 pm | W | 21 | 27 | - | - | - | - | - | - | 45.9 | - | - | - | - | - |
2025-04-21 08:10 pm | W | 23 | 29 | - | - | - | - | - | - | 46.6 | - | - | - | - | - |
2025-04-21 08:00 pm | WSW | 14 | 18 | - | - | - | - | - | - | 46.9 | - | - | - | - | - |
2025-04-21 07:50 pm | WSW | 17 | 22 | - | - | - | - | - | - | 46.9 | - | - | - | - | - |
2025-04-21 07:40 pm | WSW | 22 | 25 | - | - | - | - | - | - | 46.8 | - | - | - | - | - |
2025-04-21 07:30 pm | W | 15 | 18 | - | - | - | - | - | - | 46.8 | - | - | - | - | - |
2025-04-21 07:20 pm | WSW | 17 | 22 | - | - | - | - | - | - | 47.1 | - | - | - | - | - |
2025-04-21 07:10 pm | WSW | 23 | 30 | - | - | - | - | - | - | 47.8 | - | - | - | - | - |
2025-04-21 07:00 pm | WSW | 22 | 29 | - | - | - | - | - | - | 48.7 | - | - | - | - | - |
2025-04-21 06:50 pm | WSW | 21 | 29 | - | - | - | - | - | - | 49.1 | - | - | - | - | - |
2025-04-21 06:40 pm | WSW | 20 | 25 | - | - | - | - | - | - | 49.1 | - | - | - | - | - |
2025-04-21 06:30 pm | WSW | 18 | 22 | - | - | - | - | - | - | 49.5 | - | - | - | - | - |
2025-04-21 06:20 pm | WSW | 14 | 19 | - | - | - | - | - | - | 49.8 | - | - | - | - | - |
2025-04-21 06:10 pm | W | 20 | 26 | - | - | - | - | - | - | 50.0 | - | - | - | - | - |
2025-04-21 06:00 pm | W | 22 | 30 | - | - | - | - | - | - | 50.5 | - | - | - | - | - |
2025-04-21 05:50 pm | WSW | 26 | 30 | - | - | - | - | - | - | 51.1 | - | - | - | - | - |
2025-04-21 05:40 pm | WSW | 23 | 29 | - | - | - | - | - | - | 52.3 | - | - | - | - | - |
2025-04-21 05:30 pm | WSW | 24 | 29 | - | - | - | - | - | - | 52.5 | - | - | - | - | - |
2025-04-21 05:20 pm | WSW | 20 | 24 | - | - | - | - | - | - | 52.9 | - | - | - | - | - |
2025-04-21 05:10 pm | WSW | 22 | 27 | - | - | - | - | - | - | 53.2 | - | - | - | - | - |
2025-04-21 05:00 pm | WSW | 17 | 26 | - | - | - | - | - | - | 53.6 | - | - | - | - | - |
2025-04-21 04:50 pm | WSW | 22 | 26 | - | - | - | - | - | - | 53.6 | - | - | - | - | - |
2025-04-21 04:40 pm | W | 20 | 28 | - | - | - | - | - | - | 54.3 | - | - | - | - | - |
2025-04-21 04:30 pm | WSW | 31 | 35 | - | - | - | - | - | - | 55.0 | - | - | - | - | - |
2025-04-21 04:20 pm | WSW | 23 | 29 | - | - | - | - | - | - | - | - | - | - | - | - |
2025-04-21 04:10 pm | WSW | 21 | 26 | - | - | - | - | - | - | - | - | - | - | - | - |
2025-04-21 04:00 pm | WSW | 22 | 28 | - | - | - | - | - | - | - | - | - | - | - | - |
2025-04-21 03:50 pm | WSW | 24 | 32 | - | - | - | - | - | - | - | - | - | - | - | - |
2025-04-21 03:40 pm | WSW | 23 | 29 | - | - | - | - | - | - | - | - | - | - | - | - |
2025-04-21 03:30 pm | WSW | 15 | 19 | - | - | - | - | - | - | - | - | - | - | - | - |
2025-04-21 03:20 pm | W | 21 | 25 | - | - | - | - | - | - | - | - | - | - | - | - |
2025-04-21 03:10 pm | SE | 8 | 10 | - | - | - | - | - | - | 43.9 | - | - | - | - | - |
2025-04-21 03:00 pm | SE | 11 | 12 | - | - | - | - | - | - | 43.5 | - | - | - | - | - |
2025-04-21 02:50 pm | SE | 11 | 13 | - | - | - | - | - | - | 42.3 | - | - | - | - | - |
2025-04-21 02:40 pm | SE | 12 | 13 | - | - | - | - | - | - | 41.5 | - | - | - | - | - |
2025-04-21 02:30 pm | ESE | 9 | 10 | - | - | - | - | - | - | 41.4 | - | - | - | - | - |
2025-04-21 02:20 pm | SE | 6 | 8 | - | - | - | - | - | - | 41.4 | - | - | - | - | - |
2025-04-21 02:10 pm | ESE | 8 | 9 | - | - | - | - | - | - | 41.4 | - | - | - | - | - |
2025-04-21 02:00 pm | ESE | 13 | 14 | - | - | - | - | - | - | 41.4 | - | - | - | - | - |
2025-04-21 01:50 pm | ESE | 9 | 10 | - | - | - | - | - | - | 41.2 | - | - | - | - | - |