• Welcome to the discussion forums. To get posting, register an account. You can also register with your Facebook or Twitter login.

The Weather Thread

kxk

SAPIOSEXUAL
Fog Bow


http://www.dailymail.co.uk/news/art...photographer-snow-covered-Scottish-moors.html

Fog bows are formed in the same way as rainbows in that light is reflected inside tiny water droplets and emerges to form a large circle or arc of approximately 42°C centred on the opposite the sun.

However, there are major differences. Rainbows are formed by raindrops which are so large that rays passing through them follow well defined 'geometrical optics' paths.

With the very finest droplets, such as those forming mist or fog, the light is no longer reflected and refracted within the drops, but is diffracted by them instead to produce a much broader and pale bow - the fogbow. In other words the fog and mist droplets are too small to refract light.

Light hitting the tiny droplets merges into white, rather than being separated into rainbow colours. Fogbow colours are whiteish because the fogbows formed in each colour overlap considerably.



Read more: http://www.dailymail.co.uk/news/art...now-covered-Scottish-moors.html#ixzz4QhQt0kaV
Follow us: @MailOnline on Twitter | DailyMail on Facebook
 

Fiona

Well-Known Member
Fog Bow


http://www.dailymail.co.uk/news/art...photographer-snow-covered-Scottish-moors.html

Fog bows are formed in the same way as rainbows in that light is reflected inside tiny water droplets and emerges to form a large circle or arc of approximately 42°C centred on the opposite the sun.

However, there are major differences. Rainbows are formed by raindrops which are so large that rays passing through them follow well defined 'geometrical optics' paths.

With the very finest droplets, such as those forming mist or fog, the light is no longer reflected and refracted within the drops, but is diffracted by them instead to produce a much broader and pale bow - the fogbow. In other words the fog and mist droplets are too small to refract light.

Light hitting the tiny droplets merges into white, rather than being separated into rainbow colours. Fogbow colours are whiteish because the fogbows formed in each colour overlap considerably.



Read more: http://www.dailymail.co.uk/news/art...now-covered-Scottish-moors.html#ixzz4QhQt0kaV
Follow us: @MailOnline on Twitter | DailyMail on Facebook
Excellent picture.
 

Fiona

Well-Known Member
Thunderstorm asthma in Melbourne yesterday:

http://www.news.com.au/lifestyle/he...y/news-story/5739327bf134fbe27ad0e08691985266

That's scary really, to think it could affect almost anyone.
I am one of those who fortunately doesn't suffer from either asthma or hayfever, however I feel for those who do. I received many calls last night from sufferers of the thunderstorm variety and when I walked through ED to start my shift, triage was standing room only. Orderly staff were staying back doing overtime and from what I gather it was full on.
 
  • Like
Reactions: kxk

kxk

SAPIOSEXUAL
Weird, and never heard of it before.

I get hay fever, and have a compromised immune system as I have an auto immune disease.
I used to get pneumonia over and over, until I got a shot, still get infections and stuff and some kinds of pneumonia aren't covered.
Kind of amazed i didn't get this.

You would think doctors would warn you of the possibility of this thunder asthma.
Sounds like it hit the north of Melbourne and missed us in the south????
Can't say I noticed the storm much here. Lucky us.
 

Fiona

Well-Known Member
Weird, and never heard of it before.

I get hay fever, and have a compromised immune system as I have an auto immune disease.
I used to get pneumonia over and over, until I got a shot, still get infections and stuff and some kinds of pneumonia aren't covered.
Kind of amazed i didn't get this.

You would think doctors would warn you of the possibility of this thunder asthma.
Sounds like it hit the north of Melbourne and missed us in the south????
Can't say I noticed the storm much here. Lucky us.
I didn't notice anything remotely storm like in Richmond and Sth Yarra. Just a sharp burst of rain for a few minutes, then it seemed to be light all night. The overflow tank is outside our department window on the lower ground floor and cascades down onto the concrete which can make it sound worse than what it is.
 
  • Like
Reactions: kxk

reepbot

Hooray for Press Gang!
Weird, and never heard of it before.

I get hay fever, and have a compromised immune system as I have an auto immune disease.
I used to get pneumonia over and over, until I got a shot, still get infections and stuff and some kinds of pneumonia aren't covered.
Kind of amazed i didn't get this.

You would think doctors would warn you of the possibility of this thunder asthma.
Sounds like it hit the north of Melbourne and missed us in the south????
Can't say I noticed the storm much here. Lucky us.
i have asthma and i never heard of thunder asthma either.

six people have died from it.
 

Trala

Naughty Fairy
Multiple site donor
Awesome site donor
Not for much longer it seems, it looks like we're in for a rough summer:

http://www.news.com.au/technology/e...s/news-story/39d86afbca5b47ba9cd761e9a54b79f1

And the death toll from the thunderstorm asthma is at eight now:

http://www.abc.net.au/news/2016-11-29/thunderstorm-asthma-eighth-person-dies-from-melbourne/8074776
First day of Summer yesterday and like clockwork after a very hot day, this rolled in on the Sunny Coast to quench garden thirst.

This pic was taken yesterday at 5pm from my back veranda.

IMG_1440.JPG
 

kxk

SAPIOSEXUAL
WARNING, STAY INSIDE TONIGHT

Asthma: sufferers on high alert, with evening Melbourne thunderstorm expected


VICTORIANS have been warned to prepare for more thunderstorm asthma attacks today, two weeks after a deadly freak storm hit Melbourne.

The mercury is set to hit 34C in the city, with late showers in the afternoon or evening, and a chance of thunderstorms later tonight.

The National Asthma Council Australia says expected thunderstorm conditions combined with high pollen counts can lead to breathing problems for people with asthma and hay fever.

“Act quickly if you start to have symptoms such as shortness of breath or wheezing.”
 

reepbot

Hooray for Press Gang!
i hope it will not be that hot in toowoomba. i pray, oh i how pray, that it will be not that warm in tooowoomba. please i will say. please please please do not be that hot. oh please i am beggging you please please.
 
Top