synoptic charts

[[3889]]

On synoptics I understand how a cold, warm & occluded front is shown but what is a front made up of triangles or semi-circles interspersed with + signs instead of a solid line?
Cheers
Andy

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[kindredspirit]

Its a weak front. (fading away.)




<hr width=100% size=1><A target="_blank" HREF=http://www.begleys.com/weather.htm>Useful links for Irish waters.</A>

 

[Jools_of_Top_Cat]

would you tell me where you found this.

I spent about an hour searching last night and found no references at all to this phenomenon. I did though find some interesting teaching sites which I have bookmarked.

http://cimss.ssec.wisc.edu/satmet/index.html



<hr width=100% size=1>Julian

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[[3889]]

Thanks KS
Andy


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[kindredspirit]

Hi Julian,

I can't remember where I heard this. I searched on Copernic but couldn't find anything to confirm it.

I did however find a little quiz which might be useful in teaching

http://www.theweatherprediction.com/habyhints/

<A target="_blank" HREF=http://www.begleys.com/weather.htm>Useful links for Irish waters.

 

[kindredspirit]

Hi Julian,

Got it at <A target="_blank" HREF=http://www.begleys.com/weather.htm>Useful links for Irish waters.

 

[Jools_of_Top_Cat]

I find the weather and prediction fascinating. I have some very good books regarding reading weather and how weather works!

There are so many rules that I have trouble remembering them all. I got 8 on 10 and learnt something I did not know in the quiz about the warmest area was between the 2 fronts. Must go back to the reading again. I got the first one wrong as I applied the wrong direction around an anti cyclone, answered too quickly without engaging gear.

The quiz is very strict too, you only get one go at each question.

<hr width=100% size=1>Julian

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[kindredspirit]

I haven't really studied weather that much, (except for the ISA Yachtmaster Offshore theory) but I also find it fascinating. It was the most interesting part of the course. Its probably because we live in an area of constantly changing weather patterns. (When I was on holiday recently in Aruba, no-one talked about the weather, it wasn't mentioned on TV or radio simply because the temperature stayed day and night, "winter" and "summer" between 80 and 82: the wind was a constant 20 mph. Never any change!)

What I would like to know more about is long range forecasts. Applying the basic principles from Lewis Fry Richardson, I suppose, and how they could be made more accurate. When I was young, there was a guy in Wallingford who made a prediction of the summer weather every spring, and every year he was right! Why can't a modern forecaster do that?

<hr width=100% size=1><A target="_blank" HREF=http://www.begleys.com/weather.htm>Useful links for Irish waters.</A>

 

[[3889]]

Hi
I had a look at your links - great quiz.
One thing I did doubt is " When two cold fronts lift up a warm front, an occluded front occurs. All three air masses must be moving at a similar speed for this to happen. This condition is usually not marked on weather maps in the newspapers because they just bring cold weather with a little bit of rain or snow (Victor p.339)."
Surely an occluded front brings a lot of rain, more than a cold or warm front or am I wrong about this.
Andy



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[kindredspirit]

I'm not a meterologist but I also thought that an occluded front brought more continuous rain than a cold or warm front.

Victor p.339 Is that an American site? Maybe they have different types of depressions over there.

<hr width=100% size=1><A target="_blank" HREF=http://www.begleys.com/weather.htm>Useful links for Irish waters.</A>