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.

Table 2.  Time and Sub-time Period Definitions 
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.

Report a problem or mistake on this page
Please select all that apply:

Privacy statement

Thank you for your help!

You will not receive a reply. For enquiries, contact us.

Date modified: