Guide to marine weather forecasts: chapter 3
For simplicity, the marine forecast will make use of a limited number of time-qualified phrases such as “diminishing early this afternoon” or “ending tonight” to convey information about when significant changes to the marine weather are expected to occur.
These timing phrases are defined based on (local) clock time. For reference, forecast timing phrases and their associated defined clock times are stated in Table 2 below.
| Time Period term | Corresponding Time Period (local time) | Sub-time Period term | Corresponding Time Period (local time) |
|---|---|---|---|
| Morning | 6:00 a.m. - 11:59 a.m. | Early morning Late morning |
6:00 a.m. - 08:59 a.m. 9:00 a.m. - 11:59 a.m. |
| Near Noon | 11:01 a.m. - 12:59 p.m. | ||
| Afternoon | 12 noon - 5:59 p.m. | Early afternoon Late afternoon |
12 noon - 2:59 p.m. 3:00 p.m. - 5:59 p.m. |
| Late in the day | 3:00 p.m. - 11:59 p.m. | ||
| Evening | 6:00 p.m. - 11:59 p.m. | Early evening Late evening |
6:00 p.m. - 8:59 p.m. 9:00 p.m. - 11:59 p.m. |
| Near Midnight | 11:01 p.m. - 12:59 a.m. | ||
| Overnight | 12 midnight - 5:59 a.m. | After midnight Late overnight |
12 midnight - 2:59 a.m. 3:00 a.m. - 5:59 a.m. |
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