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 |
2025-03-29 01:20 pm | E | 2 | 3 | - | - | - | - | - | - | 30.0 | - | - | - | - | - |
2025-03-29 01:10 pm | ENE | 2 | 2 | - | - | - | - | - | - | 29.8 | - | - | - | - | - |
2025-03-29 01:00 pm | ENE | 2 | 3 | - | - | - | - | - | - | 30.0 | - | - | - | - | - |
2025-03-29 12:50 pm | ENE | 2 | 3 | - | - | - | - | - | - | 30.0 | - | - | - | - | - |
2025-03-29 12:40 pm | E | 2 | 2 | - | - | - | - | - | - | 29.7 | - | - | - | - | - |
2025-03-29 12:30 pm | E | 2 | 3 | - | - | - | - | - | - | 29.8 | - | - | - | - | - |
2025-03-29 12:20 pm | ENE | 2 | 2 | - | - | - | - | - | - | 29.8 | - | - | - | - | - |
2025-03-29 12:10 pm | ENE | 2 | 2 | - | - | - | - | - | - | 30.0 | - | - | - | - | - |
2025-03-29 12:00 pm | ENE | 1 | 2 | - | - | - | - | - | - | 30.2 | - | - | - | - | - |
2025-03-29 11:50 am | ENE | 2 | 2 | - | - | - | - | - | - | 30.0 | - | - | - | - | - |
2025-03-29 11:40 am | ENE | 3 | 4 | - | - | - | - | - | - | 29.8 | - | - | - | - | - |
2025-03-29 11:30 am | E | 3 | 3 | - | - | - | - | - | - | 30.0 | - | - | - | - | - |
2025-03-29 11:20 am | E | 3 | 3 | - | - | - | - | - | - | 29.8 | - | - | - | - | - |
2025-03-29 11:10 am | E | 3 | 3 | - | - | - | - | - | - | 29.8 | - | - | - | - | - |
2025-03-29 11:00 am | E | 3 | 4 | - | - | - | - | - | - | 29.7 | - | - | - | - | - |
2025-03-29 10:50 am | ENE | 2 | 4 | - | - | - | - | - | - | 29.5 | - | - | - | - | - |
2025-03-29 10:40 am | ENE | 2 | 3 | - | - | - | - | - | - | 29.7 | - | - | - | - | - |
2025-03-29 10:30 am | ENE | 2 | 3 | - | - | - | - | - | - | 29.5 | - | - | - | - | - |
2025-03-29 10:20 am | ENE | 2 | 3 | - | - | - | - | - | - | 29.5 | - | - | - | - | - |
2025-03-29 10:10 am | ENE | 2 | 3 | - | - | - | - | - | - | 29.3 | - | - | - | - | - |
2025-03-29 10:00 am | ENE | 2 | 2 | - | - | - | - | - | - | 29.5 | - | - | - | - | - |
2025-03-29 09:50 am | ENE | 2 | 3 | - | - | - | - | - | - | 29.3 | - | - | - | - | - |
2025-03-29 09:40 am | ENE | 2 | 3 | - | - | - | - | - | - | 29.3 | - | - | - | - | - |
2025-03-29 09:30 am | NE | 2 | 2 | - | - | - | - | - | - | 29.3 | - | - | - | - | - |
2025-03-29 09:20 am | ENE | 3 | 4 | - | - | - | - | - | - | 29.7 | - | - | - | - | - |
2025-03-29 09:10 am | ENE | 2 | 3 | - | - | - | - | - | - | 29.3 | - | - | - | - | - |
2025-03-29 09:00 am | ENE | 2 | 3 | - | - | - | - | - | - | 29.3 | - | - | - | - | - |
2025-03-29 08:50 am | NE | 2 | 4 | - | - | - | - | - | - | 29.3 | - | - | - | - | - |
2025-03-29 08:40 am | ENE | 3 | 4 | - | - | - | - | - | - | 29.5 | - | - | - | - | - |
2025-03-29 08:30 am | NE | 2 | 3 | - | - | - | - | - | - | 29.7 | - | - | - | - | - |
2025-03-29 08:20 am | ENE | 2 | 3 | - | - | - | - | - | - | 30.0 | - | - | - | - | - |
2025-03-29 08:10 am | NE | 2 | 3 | - | - | - | - | - | - | 30.0 | - | - | - | - | - |
2025-03-29 08:00 am | ENE | 3 | 5 | - | - | - | - | - | - | 30.0 | - | - | - | - | - |
2025-03-29 07:50 am | ENE | 2 | 3 | - | - | - | - | - | - | 30.4 | - | - | - | - | - |
2025-03-29 07:40 am | ENE | 2 | 3 | - | - | - | - | - | - | 30.4 | - | - | - | - | - |
2025-03-29 07:30 am | NE | 3 | 4 | - | - | - | - | - | - | 30.4 | - | - | - | - | - |
2025-03-29 07:20 am | ENE | 3 | 4 | - | - | - | - | - | - | 30.4 | - | - | - | - | - |
2025-03-29 07:10 am | NE | 2 | 3 | - | - | - | - | - | - | 30.7 | - | - | - | - | - |
2025-03-29 07:00 am | NE | 2 | 4 | - | - | - | - | - | - | 30.7 | - | - | - | - | - |
2025-03-29 06:50 am | NE | 2 | 3 | - | - | - | - | - | - | 30.9 | - | - | - | - | - |
2025-03-29 06:40 am | ENE | 3 | 5 | - | - | - | - | - | - | 30.7 | - | - | - | - | - |
2025-03-29 06:30 am | ENE | 3 | 4 | - | - | - | - | - | - | 31.1 | - | - | - | - | - |
2025-03-29 06:20 am | ENE | 3 | 4 | - | - | - | - | - | - | 31.1 | - | - | - | - | - |
2025-03-29 06:10 am | NE | 3 | 5 | - | - | - | - | - | - | 31.1 | - | - | - | - | - |
2025-03-29 06:00 am | ENE | 4 | 5 | - | - | - | - | - | - | 31.3 | - | - | - | - | - |
2025-03-29 05:50 am | ENE | 4 | 6 | - | - | - | - | - | - | 31.5 | - | - | - | - | - |
2025-03-29 05:40 am | ENE | 4 | 7 | - | - | - | - | - | - | 31.5 | - | - | - | - | - |
2025-03-29 05:30 am | ENE | 5 | 8 | - | - | - | - | - | - | 31.6 | - | - | - | - | - |
2025-03-29 05:20 am | ENE | 4 | 6 | - | - | - | - | - | - | 31.8 | - | - | - | - | - |
2025-03-29 05:10 am | NE | 4 | 7 | - | - | - | - | - | - | 31.8 | - | - | - | - | - |
2025-03-29 05:00 am | ENE | 5 | 7 | - | - | - | - | - | - | 32.2 | - | - | - | - | - |
2025-03-29 04:50 am | ENE | 6 | 7 | - | - | - | - | - | - | 32.0 | - | - | - | - | - |
2025-03-29 04:40 am | ENE | 5 | 7 | - | - | - | - | - | - | 32.2 | - | - | - | - | - |
2025-03-29 04:30 am | NE | 2 | 4 | - | - | - | - | - | - | 32.2 | - | - | - | - | - |
2025-03-29 04:20 am | NE | 4 | 6 | - | - | - | - | - | - | 32.2 | - | - | - | - | - |
2025-03-29 04:10 am | ENE | 6 | 9 | - | - | - | - | - | - | 32.2 | - | - | - | - | - |
2025-03-29 04:00 am | ENE | 7 | 9 | - | - | - | - | - | - | 32.4 | - | - | - | - | - |
2025-03-29 03:50 am | ENE | 5 | 8 | - | - | - | - | - | - | 32.2 | - | - | - | - | - |
2025-03-29 03:40 am | ENE | 7 | 9 | - | - | - | - | - | - | 32.2 | - | - | - | - | - |
2025-03-29 03:30 am | E | 9 | 11 | - | - | - | - | - | - | 32.4 | - | - | - | - | - |
2025-03-29 03:20 am | E | 10 | 12 | - | - | - | - | - | - | 32.2 | - | - | - | - | - |
2025-03-29 03:10 am | ENE | 9 | 11 | - | - | - | - | - | - | 32.0 | - | - | - | - | - |
2025-03-29 03:00 am | ENE | 6 | 9 | - | - | - | - | - | - | 32.0 | - | - | - | - | - |
2025-03-29 02:50 am | ENE | 6 | 9 | - | - | - | - | - | - | 32.0 | - | - | - | - | - |
2025-03-29 02:40 am | ENE | 6 | 9 | - | - | - | - | - | - | 32.0 | - | - | - | - | - |
2025-03-29 02:30 am | ENE | 9 | 12 | - | - | - | - | - | - | 32.0 | - | - | - | - | - |
2025-03-29 02:20 am | ENE | 9 | 14 | - | - | - | - | - | - | 32.0 | - | - | - | - | - |
2025-03-29 02:10 am | ENE | 8 | 12 | - | - | - | - | - | - | 32.0 | - | - | - | - | - |
2025-03-29 02:00 am | NE | 6 | 10 | - | - | - | - | - | - | 32.0 | - | - | - | - | - |
2025-03-29 01:50 am | NE | 9 | 12 | - | - | - | - | - | - | 32.0 | - | - | - | - | - |
2025-03-29 01:40 am | NE | 7 | 10 | - | - | - | - | - | - | 32.0 | - | - | - | - | - |
2025-03-29 01:30 am | ENE | 13 | 15 | - | - | - | - | - | - | 32.0 | - | - | - | - | - |
2025-03-29 01:20 am | E | 12 | 14 | - | - | - | - | - | - | 32.0 | - | - | - | - | - |
2025-03-29 01:10 am | E | 13 | 17 | - | - | - | - | - | - | 32.2 | - | - | - | - | - |
2025-03-29 01:00 am | E | 20 | 21 | - | - | - | - | - | - | 32.0 | - | - | - | - | - |
2025-03-29 12:50 am | E | 18 | 23 | - | - | - | - | - | - | 32.2 | - | - | - | - | - |
2025-03-29 12:40 am | E | 19 | 21 | - | - | - | - | - | - | 32.0 | - | - | - | - | - |
2025-03-29 12:30 am | ENE | 19 | 22 | - | - | - | - | - | - | 32.2 | - | - | - | - | - |
2025-03-29 12:20 am | E | 18 | 23 | - | - | - | - | - | - | 32.0 | - | - | - | - | - |
2025-03-29 12:10 am | E | 20 | 24 | - | - | - | - | - | - | 32.2 | - | - | - | - | - |
2025-03-29 12:00 am | E | 16 | 20 | - | - | - | - | - | - | 32.2 | - | - | - | - | - |
2025-03-28 11:50 pm | NNE | 10 | 14 | - | - | - | - | - | - | 32.4 | - | - | - | - | - |
2025-03-28 11:40 pm | N | 8 | 14 | - | - | - | - | - | - | 32.4 | - | - | - | - | - |
2025-03-28 11:30 pm | NE | 12 | 18 | - | - | - | - | - | - | 32.2 | - | - | - | - | - |
2025-03-28 11:20 pm | ENE | 17 | 27 | - | - | - | - | - | - | 32.2 | - | - | - | - | - |
2025-03-28 11:10 pm | ENE | 19 | 28 | - | - | - | - | - | - | 31.8 | - | - | - | - | - |
2025-03-28 11:00 pm | ENE | 22 | 26 | - | - | - | - | - | - | 32.0 | - | - | - | - | - |
2025-03-28 10:50 pm | E | 23 | 25 | - | - | - | - | - | - | 31.8 | - | - | - | - | - |
2025-03-28 10:40 pm | ENE | 19 | 24 | - | - | - | - | - | - | 31.6 | - | - | - | - | - |
2025-03-28 10:30 pm | ENE | 17 | 25 | - | - | - | - | - | - | 31.6 | - | - | - | - | - |
2025-03-28 10:20 pm | ENE | 20 | 24 | - | - | - | - | - | - | 32.0 | - | - | - | - | - |
2025-03-28 10:10 pm | ENE | 24 | 29 | - | - | - | - | - | - | 31.8 | - | - | - | - | - |
2025-03-28 10:00 pm | NE | 16 | 23 | - | - | - | - | - | - | 31.8 | - | - | - | - | - |
2025-03-28 09:50 pm | ENE | 19 | 22 | - | - | - | - | - | - | 32.4 | - | - | - | - | - |
2025-03-28 09:40 pm | ENE | 15 | 22 | - | - | - | - | - | - | 32.2 | - | - | - | - | - |
2025-03-28 09:30 pm | NE | 11 | 15 | - | - | - | - | - | - | 32.4 | - | - | - | - | - |
2025-03-28 09:20 pm | NE | 8 | 12 | - | - | - | - | - | - | 32.7 | - | - | - | - | - |
2025-03-28 09:10 pm | E | 18 | 21 | - | - | - | - | - | - | 32.7 | - | - | - | - | - |
2025-03-28 09:00 pm | E | 17 | 20 | - | - | - | - | - | - | 32.7 | - | - | - | - | - |
2025-03-28 08:50 pm | E | 16 | 20 | - | - | - | - | - | - | 32.7 | - | - | - | - | - |
2025-03-28 08:40 pm | ENE | 16 | 21 | - | - | - | - | - | - | 32.7 | - | - | - | - | - |
2025-03-28 08:30 pm | E | 17 | 20 | - | - | - | - | - | - | 32.9 | - | - | - | - | - |
2025-03-28 08:20 pm | E | 18 | 21 | - | - | - | - | - | - | 32.9 | - | - | - | - | - |
2025-03-28 08:10 pm | ENE | 14 | 18 | - | - | - | - | - | - | 33.1 | - | - | - | - | - |
2025-03-28 08:00 pm | E | 18 | 20 | - | - | - | - | - | - | 32.9 | - | - | - | - | - |
2025-03-28 07:50 pm | E | 16 | 19 | - | - | - | - | - | - | 33.1 | - | - | - | - | - |
2025-03-28 07:40 pm | E | 17 | 19 | - | - | - | - | - | - | 33.3 | - | - | - | - | - |
2025-03-28 07:30 pm | E | 17 | 20 | - | - | - | - | - | - | 33.4 | - | - | - | - | - |
2025-03-28 07:20 pm | E | 15 | 17 | - | - | - | - | - | - | 33.4 | - | - | - | - | - |
2025-03-28 07:10 pm | E | 14 | 17 | - | - | - | - | - | - | 33.4 | - | - | - | - | - |
2025-03-28 07:00 pm | E | 15 | 16 | - | - | - | - | - | - | 33.4 | - | - | - | - | - |
2025-03-28 06:50 pm | E | 16 | 18 | - | - | - | - | - | - | 33.4 | - | - | - | - | - |
2025-03-28 06:40 pm | E | 16 | 19 | - | - | - | - | - | - | 33.1 | - | - | - | - | - |
2025-03-28 06:30 pm | E | 15 | 20 | - | - | - | - | - | - | 33.3 | - | - | - | - | - |
2025-03-28 06:20 pm | E | 17 | 20 | - | - | - | - | - | - | 33.1 | - | - | - | - | - |
2025-03-28 06:10 pm | E | 18 | 19 | - | - | - | - | - | - | 32.9 | - | - | - | - | - |
2025-03-28 06:00 pm | E | 17 | 21 | - | - | - | - | - | - | 33.1 | - | - | - | - | - |
2025-03-28 05:50 pm | E | 18 | 21 | - | - | - | - | - | - | 33.1 | - | - | - | - | - |
2025-03-28 05:40 pm | E | 16 | 18 | - | - | - | - | - | - | 32.9 | - | - | - | - | - |
2025-03-28 05:30 pm | E | 17 | 20 | - | - | - | - | - | - | 32.9 | - | - | - | - | - |
2025-03-28 05:20 pm | E | 16 | 18 | - | - | - | - | - | - | 32.9 | - | - | - | - | - |
2025-03-28 05:10 pm | E | 16 | 21 | - | - | - | - | - | - | 33.1 | - | - | - | - | - |
2025-03-28 05:00 pm | E | 16 | 18 | - | - | - | - | - | - | 33.3 | - | - | - | - | - |
2025-03-28 04:50 pm | E | 18 | 21 | - | - | - | - | - | - | 33.1 | - | - | - | - | - |
2025-03-28 04:40 pm | E | 17 | 20 | - | - | - | - | - | - | 33.1 | - | - | - | - | - |
2025-03-28 04:30 pm | E | 17 | 20 | - | - | - | - | - | - | 33.1 | - | - | - | - | - |
2025-03-28 04:20 pm | E | 18 | 21 | - | - | - | - | - | - | 33.1 | - | - | - | - | - |
2025-03-28 04:10 pm | E | 17 | 19 | - | - | - | - | - | - | 33.3 | - | - | - | - | - |
2025-03-28 04:00 pm | E | 17 | 20 | - | - | - | - | - | - | 33.3 | - | - | - | - | - |
2025-03-28 03:50 pm | E | 15 | 17 | - | - | - | - | - | - | 33.4 | - | - | - | - | - |
2025-03-28 03:40 pm | E | 15 | 18 | - | - | - | - | - | - | 33.4 | - | - | - | - | - |
2025-03-28 03:30 pm | E | 15 | 16 | - | - | - | - | - | - | 33.6 | - | - | - | - | - |
2025-03-28 03:20 pm | E | 14 | 16 | - | - | - | - | - | - | 33.4 | - | - | - | - | - |
2025-03-28 03:10 pm | E | 13 | 15 | - | - | - | - | - | - | 34.0 | - | - | - | - | - |
2025-03-28 03:00 pm | E | 15 | 17 | - | - | - | - | - | - | 33.8 | - | - | - | - | - |
2025-03-28 02:50 pm | E | 15 | 17 | - | - | - | - | - | - | 33.8 | - | - | - | - | - |
2025-03-28 02:40 pm | E | 16 | 18 | - | - | - | - | - | - | 33.8 | - | - | - | - | - |
2025-03-28 02:30 pm | E | 18 | 20 | - | - | - | - | - | - | 33.8 | - | - | - | - | - |
2025-03-28 02:20 pm | E | 18 | 22 | - | - | - | - | - | - | 33.8 | - | - | - | - | - |
2025-03-28 02:10 pm | E | 18 | 22 | - | - | - | - | - | - | 34.2 | - | - | - | - | - |
2025-03-28 02:00 pm | E | 19 | 23 | - | - | - | - | - | - | 34.0 | - | - | - | - | - |
2025-03-28 01:50 pm | E | 17 | 20 | - | - | - | - | - | - | 34.2 | - | - | - | - | - |
2025-03-28 01:40 pm | E | 22 | 25 | - | - | - | - | - | - | 34.2 | - | - | - | - | - |
2025-03-28 01:30 pm | E | 16 | 20 | - | - | - | - | - | - | 34.5 | - | - | - | - | - |
2025-03-28 01:20 pm | E | 19 | 20 | - | - | - | - | - | - | 34.3 | - | - | - | - | - |
2025-03-28 01:10 pm | E | 14 | 17 | - | - | - | - | - | - | 34.7 | - | - | - | - | - |
2025-03-28 01:00 pm | E | 19 | 20 | - | - | - | - | - | - | 34.7 | - | - | - | - | - |
2025-03-28 12:50 pm | E | 18 | 19 | - | - | - | - | - | - | 34.7 | - | - | - | - | - |