Weather Forecasts

[nicho]

This is going to show desperate naivety I know, but to settle an argument , on synoptic charts, does the time "00.00 UTC Sat 02 Nov 2002" (for example), relate to midnight on THAT particular day (i.e. midnight on the 2nd November) -as I believe - or midnight on the previous day? - the 24 hours could make a big difference!!

 

[tome]

T'other way round the clock expires at 23:59:59, resets to zero and the day is incremented so it's midnight on Fri 1st.

...or so I believe

 

[nicho]

Bugger, I've just lost money! - but many thanks for the reply.

 

[ccscott49]

Actually to be completly correct 00:00 does not have a date, as it's neither friday or saturday 23:59:59 is friday, 00:00:01 is saturday, we were always told in the army, thats was our only time off! 00:00:00! IMHO. But what it actually means is midnight between friday and saturday. /forums/images/icons/wink.gif

 

[nicho]

Thanks Colin, I never stop learning it seems!

 

[david_e]

Re: Army

Come on then, which regi/corps?

 

[LadyInBed]

Re: Time Off

They were fibbing!
They only told you that to stop you getting home sick.

 

[corkonian1]

Re: Time Off

To settle another argument ..
When the forecast says wind force 4 to 6 does it mean.
1.The wind could be anything from 4 to 6 - we dunno
2.The wind will be force 4 with force 6 gusts
3.The wind will definitlly vary from force 4 to 6.

 

[pandroid]

Re: Time Off

From my weather course:
The mean wind speed (measured I think over 10 minutes) will vary during the period between force 4 and force 6. There is a chart which shows expected gust maximum speed for each BF, but it something like 2 or 3 times mean speed. (i.e F3 can have gusts of 25 knots or something (the chart's at home....)

 

[franksingleton]

Re: Weather Forecasts and Time off

Weather forecasts

The time 00 on a chart dated 24, say, is at the start of the 24th. ie it is really 240001 and not 232359.

Winds force 4-6 is meant to mean that the average wind, ie in strict meteorlogical speak, the 10 minute mean winds, are expected to be in the range F 4 to 6. That may seem a big diffrence but weather is like that. A trite phrase of mine is that the weather does not know itself to within one Beaufort force.

I discuss these types of problems on www.franksingleton.clara.net

Frank