Weather question
#1
Scooby Regular
Thread Starter
Join Date: Oct 2000
Location: same time, different place
Posts: 11,313
Likes: 0
Received 4 Likes
on
2 Posts
Weather question
OK, so it's hot in the UK now (so I gather). Like it's been hot in Lisbon for the last, I dunno, month. Yesterday it was cooler (27C), bit cloudy, bit breezy (some serious gusts), a few big thundery spots of rain. Last night it was still 27-28, quite high humidity, and then at 7.20pm the precipitation started.
HAILSTONES! Frikkin rocks, I'd say some up to 12mm or more! Bouncing and twanging off my car roof - I've yet to check it for dents but I have my suspicions.
After 3-4 minutes it changed to a typical summer downpour.
How the hail do we get ice out of the sky like that in Lisbon in July?
HAILSTONES! Frikkin rocks, I'd say some up to 12mm or more! Bouncing and twanging off my car roof - I've yet to check it for dents but I have my suspicions.
After 3-4 minutes it changed to a typical summer downpour.
How the hail do we get ice out of the sky like that in Lisbon in July?
#5
Originally Posted by scoobynutta555
27C, pah, that's not hot. Should be 36-37 today here in Blighty
http://www.bbc.co.uk/weather/5day.shtml?world=0248
Trending Topics
#8
Scooby Regular
iTrader: (2)
Originally Posted by rossyboy
I'd take a stab at it being the height at which thunderstorm clouds go to. ie - pretty high up and its much colder up there.
Friction in the clouds between particles seperates charges, and the result is a thunderstorm.
The height to which the clouds rise is enormous, causing the water vapour to condense, then freeze into hailstones.
Alcazar
#10
Scooby Regular
Join Date: Feb 2001
Location: Markyate.Imprezas owned:-wrx-sti5typeR-p1-uk22b-modded my00. Amongst others!
Posts: 8,541
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Brendan Hughes
Today? We've had it for the last two weeks
#11
Scooby Senior
iTrader: (1)
Join Date: Nov 2000
Location: Wildberg, Germany/Reading, UK
Posts: 9,706
Likes: 0
Received 73 Likes
on
54 Posts
Originally Posted by Brendan Hughes
OK, so it's hot in the UK now (so I gather). Like it's been hot in Lisbon for the last, I dunno, month. Yesterday it was cooler (27C), bit cloudy, bit breezy (some serious gusts), a few big thundery spots of rain. Last night it was still 27-28, quite high humidity, and then at 7.20pm the precipitation started.
HAILSTONES! Frikkin rocks, I'd say some up to 12mm or more! Bouncing and twanging off my car roof - I've yet to check it for dents but I have my suspicions.
After 3-4 minutes it changed to a typical summer downpour.
How the hail do we get ice out of the sky like that in Lisbon in July?
HAILSTONES! Frikkin rocks, I'd say some up to 12mm or more! Bouncing and twanging off my car roof - I've yet to check it for dents but I have my suspicions.
After 3-4 minutes it changed to a typical summer downpour.
How the hail do we get ice out of the sky like that in Lisbon in July?
Sorry for not being to technical but hopefully you get the idea
#12
Originally Posted by alcazar
Spot on! Thunder clouds are caused by the heated air rising very quickly. It carries an enormous amount of water at that temeprature, as vapour.
Friction in the clouds between particles seperates charges, and the result is a thunderstorm.
The height to which the clouds rise is enormous, causing the water vapour to condense, then freeze into hailstones.
Alcazar
Friction in the clouds between particles seperates charges, and the result is a thunderstorm.
The height to which the clouds rise is enormous, causing the water vapour to condense, then freeze into hailstones.
Alcazar
#13
I have some friends in Bahrain. They think it feesl warmer here. Over there everything is air conditioned (houses, hotels, cars, businesses). Best pack your woolly jumpers I'd say.
Originally Posted by Kyl3cook
meh....37 is like a winters day where I'll be in 3 months...for the next 7 years!...Bugger! I burn easily
http://www.bbc.co.uk/weather/5day.shtml?world=0248
http://www.bbc.co.uk/weather/5day.shtml?world=0248
#14
Scooby Regular
iTrader: (2)
Originally Posted by James Neill
But if hot air rises why's it so damn hot down here and so cold up there?
When they reach the ground, etc, the rays come into contact with solid, opaque objects, and, being unable to pass through them, raise their temperature. Even the sun's LIGHT is changed into heat.
It's contact with, or nearness to, this heated surface that heats the air.
As warmed air rises, it loses the heat, passing it to cooler air descending. Only when the earth's temperature is very high can it rise fast enough, and carrying enough water, to cause a thunderstorm.
Mostly, the warmer air rises, and cooler air rushes in to take it's place: a breeze. This phenomenon is most obvious at the seaside, since the sea takes MUCH longer to warm up than the land, hence cooler onshore breezes.
The reasons that the sea takes longer to heat up depends on the movement of the water, heting it to a much greater depth than the land, the specific heat capacity of water, (quite high), and the fact that even quite mucky water is still fairly transparent to light and heat.
Alcazar
#18
Originally Posted by davegtt
no idea but its gonna rain here over the weekend
ohh did I mention Im going to Rhodes tonight
ohh did I mention Im going to Rhodes tonight
#19
Wurzel is quite right about the up draughts. That's how the hail stones grow and grow.
As to the temperature have you noticed the temperature indicated on the tv screen on passenger flights. At cruising altitude, which is typically the height of the top of serious thunder clouds - the anvil shaped ones- the outside temperature is typically -60 C. That is seriously cold.
Here's a diagram from BBC weather that shows what happens.
http://www.bbc.co.uk/weather/weather...mes/hail.shtml
As to the temperature have you noticed the temperature indicated on the tv screen on passenger flights. At cruising altitude, which is typically the height of the top of serious thunder clouds - the anvil shaped ones- the outside temperature is typically -60 C. That is seriously cold.
Here's a diagram from BBC weather that shows what happens.
http://www.bbc.co.uk/weather/weather...mes/hail.shtml
Last edited by CharlesW; 20 July 2006 at 12:44 AM.
#21
You can count yourself lucky they weren't this big!
http://www.chaseday.com/hailstones.htm
http://www.theweatherprediction.com/severe/gianthail/
http://www.chaseday.com/hailstones.htm
http://www.theweatherprediction.com/severe/gianthail/
Thread
Thread Starter
Forum
Replies
Last Post
Brzoza
Engine Management and ECU Remapping
1
02 October 2015 05:26 PM