DJE
Well-known member
Weather looks dodgy again!
Kids Out Day on Friday.
- Thread starter DJE
- Start date
tome
New member
Keeping fingers crossed that we'll get a break in the weather for Friday morning. Seem to remember a similar forecast 3 years ago(?) which turned out fine in the end
If you see us going round in circles don't worry - we need to calibrate our new autopilot!
If you see us going round in circles don't worry - we need to calibrate our new autopilot!
Cutter
Active member
Figures on synoptic charts
Was discussing this with Becky's HMBO (who is a YM instructor) but neither of us could remember what the background figures on a synoptic chart refer to.
Not the pressure fig on the Isobars but the background faint dotted lines such as 564 on the above chart.
Please put me out of my misery
Ta
Was discussing this with Becky's HMBO (who is a YM instructor) but neither of us could remember what the background figures on a synoptic chart refer to.
Not the pressure fig on the Isobars but the background faint dotted lines such as 564 on the above chart.
Please put me out of my misery
Ta
DJE
Well-known member
Re: Figures on synoptic charts
The met office site says they are:-
"<span style="color:red"> Thickness Lines </span>
Pressure decreases with altitude, and thickness measures the difference in height between two standard pressure levels in the atmosphere. It is proportional to the mean temperature of this layer of air, so is a useful way of describing the temperature of an airmass.
Weather charts commonly show contour lines of 1,000-500 hPa thickness, which represent the depth (in decametres, where 1 dam = 10 m) of the layer between the 1,000 hPa and 500 hPa pressure levels. Cold, polar air has low thickness, and values of 528 dam or less frequently bring snow to the UK. Conversely, warm, tropical air has high thickness, and values in excess of 564 dam across the UK often indicate a heatwave."
More details here.
The met office site says they are:-
"<span style="color:red"> Thickness Lines </span>
Pressure decreases with altitude, and thickness measures the difference in height between two standard pressure levels in the atmosphere. It is proportional to the mean temperature of this layer of air, so is a useful way of describing the temperature of an airmass.
Weather charts commonly show contour lines of 1,000-500 hPa thickness, which represent the depth (in decametres, where 1 dam = 10 m) of the layer between the 1,000 hPa and 500 hPa pressure levels. Cold, polar air has low thickness, and values of 528 dam or less frequently bring snow to the UK. Conversely, warm, tropical air has high thickness, and values in excess of 564 dam across the UK often indicate a heatwave."
More details here.
tome
New member
Re: Figures on synoptic charts
Thickness lines
Pressure decreases with altitude, and thickness measures the difference in height between two standard pressure levels in the atmosphere. It is proportional to the mean temperature of this layer of air, so is a useful way of describing the temperature of an airmass.
Weather charts commonly show contour lines of 1,000-500 hPa thickness, which represent the depth (in decametres, where 1 dam = 10 m) of the layer between the 1,000 hPa and 500 hPa pressure levels. Cold, polar air has low thickness, and values of 528 dam or less frequently bring snow to the UK. Conversely, warm, tropical air has high thickness, and values in excess of 564 dam across the UK often indicate a heatwave.
Thickness lines
Pressure decreases with altitude, and thickness measures the difference in height between two standard pressure levels in the atmosphere. It is proportional to the mean temperature of this layer of air, so is a useful way of describing the temperature of an airmass.
Weather charts commonly show contour lines of 1,000-500 hPa thickness, which represent the depth (in decametres, where 1 dam = 10 m) of the layer between the 1,000 hPa and 500 hPa pressure levels. Cold, polar air has low thickness, and values of 528 dam or less frequently bring snow to the UK. Conversely, warm, tropical air has high thickness, and values in excess of 564 dam across the UK often indicate a heatwave.
tome
New member
Re: Figures on synoptic charts
Hee hee, beat me to it!
Hee hee, beat me to it!
DJE
Well-known member
Re: Figures on synoptic charts
He could of looked it up himself though, bright chap like him. /forums/images/graemlins/grin.gif
He could of looked it up himself though, bright chap like him. /forums/images/graemlins/grin.gif
tome
New member
Re: Figures on synoptic charts
Yes agreed. He's not very good with his hands - bit shaky you know!
Yes agreed. He's not very good with his hands - bit shaky you know!
Sans Bateau
Well-known member
Re: Figures on synoptic charts
[ QUOTE ]
He could of looked it up himself though, bright chap like him.
[/ QUOTE ]
Thats the point, when your that bright, you have people do things for you! /forums/images/graemlins/laugh.gif
[ QUOTE ]
He could of looked it up himself though, bright chap like him.
[/ QUOTE ]
Thats the point, when your that bright, you have people do things for you! /forums/images/graemlins/laugh.gif
Slow_boat
New member
Re: Figures on synoptic charts
[ QUOTE ]
He could of looked it up himself though, bright chap like him. /forums/images/graemlins/grin.gif
[/ QUOTE ]
Yes, he could have.
(sorry, pet hate of mine). /forums/images/graemlins/grin.gif
[ QUOTE ]
He could of looked it up himself though, bright chap like him. /forums/images/graemlins/grin.gif
[/ QUOTE ]
Yes, he could have.
(sorry, pet hate of mine). /forums/images/graemlins/grin.gif
graham
Well-known member
Re: Figures on synoptic charts
If he had looked it up then he would now know but by asking on here loads of us know now.
I hope the weather including the thickness /forums/images/graemlins/grin.gifis OKfor the kids afloat day.
If he had looked it up then he would now know but by asking on here loads of us know now.
I hope the weather including the thickness /forums/images/graemlins/grin.gifis OKfor the kids afloat day.
Cutter
Active member
Re: Figures on synoptic charts
Thank you
Had looked it up but thought it might be of interest to more than just me hence the question. One of the joys of the site is learning a little something from time to time and I bet that quite a few didnt know what those were for.
And you are also right why bark when you have hounds who are willing to yap!
Thank you
Had looked it up but thought it might be of interest to more than just me hence the question. One of the joys of the site is learning a little something from time to time and I bet that quite a few didnt know what those were for.
And you are also right why bark when you have hounds who are willing to yap!
DJE
Well-known member
Re: Figures on synoptic charts
Woof Woof!
Woof Woof!
Cutter
Active member
Re: Figures on synoptic charts
Give the dog a bone!
Give the dog a bone!
Talbot
Active member
Best off luck to you all. I really enjoyed last years experience and wish I could have supplied a boat again.
Sans Bateau
Well-known member
Thanks Mark
We are having great support from people on the forum once again this year. I won't tempt fate, I'll do my thank you next week, after the event!
We are having great support from people on the forum once again this year. I won't tempt fate, I'll do my thank you next week, after the event!
Talbot
Active member
Noticed the photos you are using on the poster - I only hope the girls enjoyed their day as much as we did last year.