andrewbuch
///Member
Hopefully none hits my side, both my car and the wifes park outside
-
Read the WELCOME ALL BMWFANATICS post.
Weather & Hail Warnings
- Thread starter Ralf*
- Start date
Flash-Gordon
Honorary ///Member
Dark skies over Alberton now too :fencelook:
andrewbuch
///Member
Everyone at my office just went and moved all their cars under a big tree, I just left, got dentist at 330pm
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andrewbuch
///Member
I think we need an update from Ralf the weatherman
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Sent from my HTC Wildfire S A510e using Tapatalk 2
D
Dippies
Guest
Air pressure dropped now to 835hPa lowest ist been in the last 72 hours.
andrewbuch
///Member
Dippies said:
In English, that means?
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Flash-Gordon
Honorary ///Member
skies over Alberton
Wind is hectic, started raining now :fencelook:
Wind is hectic, started raining now :fencelook:
D
Dippies
Guest
It means this
Take note of the speed of the storm 83km/h @ andrew
What is a storm? We've determined that swells are made by wind, and wind comes from storms. But what really is a storm? Well, let's start with some basics. Air covers the surface of our planet and has mass, that is, it has weight and volume, and it can be made to move. That's fairly obvious. But what causes it to move? Our atmosphere is dynamic, and it's temperature constantly changes in response to rotation of the planet, changes in seasons and earth's orbit around the sun. Why is temperature important? Because hot air is less dense than cold air, and when hot and cold air collide, the hot air is forced to rise over the colder air. Cold air typically is dryer than warm air and originates from our planet's poles. Warm air comes from the tropics/equator. Whenever cold dry air moves away from the poles, it eventually encounters warm wet air moving away from the equator. The warm wet air is forced up and over the cold air. When the warm air is forced up, it causes surface air pressure to drop, sort of like having a small vacuum develop at the earth's surface at the boundary between the two air masses. Cold air rushes in to fill the area of lower air pressure, which causes more warm air to be displaced upward, and more cold air moves in, forcing more warm air upward, and a cycle starts to develop. Also, factor-in that the earth rotates from west to east, dragging the atmosphere with it. The low-pressure area (also known as a low pressure center or system) starts to rotate, and all this moving air creates wind, and lots of it. In the north hemisphere, wind rotates counter-clockwise around a storm center, and clockwise in the south hemisphere (this driven by the Coriolis effect).So a storm forms in response to an extreme difference in air pressure, driven by the movement of cold and warm air. Eventually either the cold or warm air dissipates, and equilibrium becomes re-established and calm, less-windy weather prevails. A storm can last as short as a few days to over a week. Our atmosphere is covered with areas of relatively high and low pressure, all driven by collisions between cold polar and warm equatorial air masses (for the most part). From a bird eye view, it is this difference in pressure between high and low-pressure systems that makes wind.
Directly related source, http://www.stormsurf.com/page2/tutorials/weatherbasics.shtml
Take note of the speed of the storm 83km/h @ andrew
What is a storm? We've determined that swells are made by wind, and wind comes from storms. But what really is a storm? Well, let's start with some basics. Air covers the surface of our planet and has mass, that is, it has weight and volume, and it can be made to move. That's fairly obvious. But what causes it to move? Our atmosphere is dynamic, and it's temperature constantly changes in response to rotation of the planet, changes in seasons and earth's orbit around the sun. Why is temperature important? Because hot air is less dense than cold air, and when hot and cold air collide, the hot air is forced to rise over the colder air. Cold air typically is dryer than warm air and originates from our planet's poles. Warm air comes from the tropics/equator. Whenever cold dry air moves away from the poles, it eventually encounters warm wet air moving away from the equator. The warm wet air is forced up and over the cold air. When the warm air is forced up, it causes surface air pressure to drop, sort of like having a small vacuum develop at the earth's surface at the boundary between the two air masses. Cold air rushes in to fill the area of lower air pressure, which causes more warm air to be displaced upward, and more cold air moves in, forcing more warm air upward, and a cycle starts to develop. Also, factor-in that the earth rotates from west to east, dragging the atmosphere with it. The low-pressure area (also known as a low pressure center or system) starts to rotate, and all this moving air creates wind, and lots of it. In the north hemisphere, wind rotates counter-clockwise around a storm center, and clockwise in the south hemisphere (this driven by the Coriolis effect).So a storm forms in response to an extreme difference in air pressure, driven by the movement of cold and warm air. Eventually either the cold or warm air dissipates, and equilibrium becomes re-established and calm, less-windy weather prevails. A storm can last as short as a few days to over a week. Our atmosphere is covered with areas of relatively high and low pressure, all driven by collisions between cold polar and warm equatorial air masses (for the most part). From a bird eye view, it is this difference in pressure between high and low-pressure systems that makes wind.
Directly related source, http://www.stormsurf.com/page2/tutorials/weatherbasics.shtml
andrewbuch
///Member
Raining and hail in blairgowrie randburg
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Sent from my HTC Wildfire S A510e using Tapatalk 2
JENICH
///Member
Dippies said:It means this
Take note of the speed of the storm 83km/h @ andrew
What is a storm? We've determined that swells are made by wind, and wind comes from storms. But what really is a storm? Well, let's start with some basics. Air covers the surface of our planet and has mass, that is, it has weight and volume, and it can be made to move. That's fairly obvious. But what causes it to move? Our atmosphere is dynamic, and it's temperature constantly changes in response to rotation of the planet, changes in seasons and earth's orbit around the sun. Why is temperature important? Because hot air is less dense than cold air, and when hot and cold air collide, the hot air is forced to rise over the colder air. Cold air typically is dryer than warm air and originates from our planet's poles. Warm air comes from the tropics/equator. Whenever cold dry air moves away from the poles, it eventually encounters warm wet air moving away from the equator. The warm wet air is forced up and over the cold air. When the warm air is forced up, it causes surface air pressure to drop, sort of like having a small vacuum develop at the earth's surface at the boundary between the two air masses. Cold air rushes in to fill the area of lower air pressure, which causes more warm air to be displaced upward, and more cold air moves in, forcing more warm air upward, and a cycle starts to develop. Also, factor-in that the earth rotates from west to east, dragging the atmosphere with it. The low-pressure area (also known as a low pressure center or system) starts to rotate, and all this moving air creates wind, and lots of it. In the north hemisphere, wind rotates counter-clockwise around a storm center, and clockwise in the south hemisphere (this driven by the Coriolis effect).So a storm forms in response to an extreme difference in air pressure, driven by the movement of cold and warm air. Eventually either the cold or warm air dissipates, and equilibrium becomes re-established and calm, less-windy weather prevails. A storm can last as short as a few days to over a week. Our atmosphere is covered with areas of relatively high and low pressure, all driven by collisions between cold polar and warm equatorial air masses (for the most part). From a bird eye view, it is this difference in pressure between high and low-pressure systems that makes wind.
Directly related source, http://www.stormsurf.com/page2/tutorials/weatherbasics.shtml
Quite a write up there Dippies
Thanks for the lesson:thumbs:
