ssdd
Hazard to Others
Posts: 211
Registered: 13-4-2007
Location: Central Canada
Member Is Offline
Mood: Hypergolic
|
|
Weather web page, anyone want to contribute?
I decided to move this over from whimsy...
One of my other joys in life is amateur meteorology. So in looking for something to do the other day I started working on a web page giving photo
albums of interesting weather events. I want the content to be original as possible. But it is hard for me to get a web page of many photos by myself.
So i was wondering if anyone else would care to contribute to the page.
http://crazyweather.dyndns.org
Let me know what you think, and if you have any ideas or want to contribute any content please contact me. 
-ssdd
All that glitters may not be gold, but at least it contains free electrons.
-- John Desmond Baernal
http://deepnorth.info/ |
|
|
ssdd
Hazard to Others
Posts: 211
Registered: 13-4-2007
Location: Central Canada
Member Is Offline
Mood: Hypergolic
|
|
Woelen sent me some great images, so here is a link to the set.
| Quote: |
These are pictures of a very violent and dark storm we had in the late afternoon/beginning of evening in July, 2004. The word "rolwolk" means "rolling
cloud". In English this type of cloud is called shelf cloud. The pictures were made in a total time frame of only 10 minutes. The strange cloud was
approaching us at an incredibly high speed and once it was above us, it become totally dark, although the sun did not yet set. |
http://crazyweather.dyndns.org/rolwolk/album/index.html
-ssdd
All that glitters may not be gold, but at least it contains free electrons.
-- John Desmond Baernal
http://deepnorth.info/ |
|
|
franklyn
International Hazard
Posts: 3026
Registered: 30-5-2006
Location: Da Big Apple
Member Is Offline
Mood: No Mood
|
|
Thor's Hammer
Called a " bolt from the blue " because it can travel horizontally tens of miles from
the source storm , positive lightning is the most destructive form of all. These arcs
can get up to 300 kiloamps peak current or more , at up to a gigavolt potential
delivering 300 gigajoules in a single strike. Back to the future anyone ?
Weather and Lightning
http://www.electricskies.com.au/index.html?contents.html&...
.
|
|
|
ssdd
Hazard to Others
Posts: 211
Registered: 13-4-2007
Location: Central Canada
Member Is Offline
Mood: Hypergolic
|
|
That last one is way too close for comfort, I've been withing 30 feet or so of a strike and I don't think I'd be taking pictures of it. 
Amazing link by the way...
-ssdd
All that glitters may not be gold, but at least it contains free electrons.
-- John Desmond Baernal
http://deepnorth.info/ |
|
|
halogen
Hazard to Others
Posts: 372
Registered: 18-4-2004
Member Is Offline
Mood: No Mood
|
|
Daaaamn. That's a breathtaking photo. Reminds me a bit of Tesla using giant arcs as lighting to read by. What gets me is how was the picture taken?
F. de Lalande and M. Prud'homme showed that a mixture of boric oxide and sodium chloride is decomposed in a stream of dry air or oxygen at a red heat
with the evolution of chlorine.
|
|
|
ssdd
Hazard to Others
Posts: 211
Registered: 13-4-2007
Location: Central Canada
Member Is Offline
Mood: Hypergolic
|
|
This is a quote from the guy who took that picture...
| Quote: |
"I happened to be out in the back yard, watching a storm on Friday night (14/01/05) that appeared to be a few km away, (I live in Old Toongabbie, and
the storm appeared to be in Pendle Hill, or Greystanes, Australia). I set the camera's settings so that the shutter remained open for four seconds,
placed it on the back bumper of my car, hoping to get a few shots of lightning in the clouds a few kilometers away. There was no rain at all, and
stars could be seen over the north 1/3 of the sky, so I did not feel in danger in any way. Boy was I mistaken... DO NOT UNDERESTIMATE ELECTRICAL
STORMS - YOU COULD GET YOURSELF KILLED!
I clicked away a few times, and got nothing, and then clicked the button again, and within 0.5 seconds of me pressing the button, I had jumped at
least 2 metres in the air, as I heard a tremendously loud crack of thunder, and see this amazingly bright beam of electricity right in front of me. I
had then landed, grabbed the camera, and was inside the house within 2 seconds.
I did not realize just how lucky I was until I uploaded the picture to my computer, and saw a leader stroke that must have originated no more than 2
metres from where I was standing next to my car, under my carport. Had the main charge taken the leader near me, rather than the one it did, I would
be dead.
When lightning strikes, it actually comes up from the ground first (called a leader stroke), this stroke makes the air within it conductive, and once
it reaches the cloud, you have a complete circuit, and the bolt of lightning comes down from the cloud along the leader stroke. First leader to the
cloud wins, luckily mine did not.
I estimate that the main bolt was approximately 1.5- 2 metres in diameter, and struck something in the yard behind the shed that is located at the
back of the yard. That would have had an extremely large charge, and would have been extremely hot, hotter than the surface of the sun, at 5,500
degrees Celsius, it could have been around 30,000 degrees Celsius. Needless to say, I was buzzing for the rest of Friday night, due to the amount of
adrenaline going through me 'cause of how close it had come."
|
-ssdd
All that glitters may not be gold, but at least it contains free electrons.
-- John Desmond Baernal
http://deepnorth.info/ |
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
