Like, in sweden we call it “april weather” but logicaly, how is it possible that 3 days ago it was hot, around 17c but today its -2c and have a chance of snowing.
That sun, 3 days ago, where did it go?
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Day to day (or short term) temperature variations is caused more by the prevailing winds. As you say, the sun’s output and angle doesn’t vary much from day to day.
If you’re in the (further) northern hemisphere, typically a high pressure system to the north and low pressure to the south means that air will be generally blowing in from north to south and that means very cold air.
The reverse is also true, a high pressure to the south and low to the north means the winds come from the south which would generally be warmer.
The ocean also plays a moderating role. So if winds blow over land, they tend to be more extreme (hot or cold) whereas winds from the ocean probably have less temperature extremes. (broadly speaking)
Day to day (or short term) temperature variations is caused more by the prevailing winds. As you say, the sun’s output and angle doesn’t vary much from day to day.
If you’re in the (further) northern hemisphere, typically a high pressure system to the north and low pressure to the south means that air will be generally blowing in from north to south and that means very cold air.
The reverse is also true, a high pressure to the south and low to the north means the winds come from the south which would generally be warmer.
The ocean also plays a moderating role. So if winds blow over land, they tend to be more extreme (hot or cold) whereas winds from the ocean probably have less temperature extremes. (broadly speaking)
Day to day (or short term) temperature variations is caused more by the prevailing winds. As you say, the sun’s output and angle doesn’t vary much from day to day.
If you’re in the (further) northern hemisphere, typically a high pressure system to the north and low pressure to the south means that air will be generally blowing in from north to south and that means very cold air.
The reverse is also true, a high pressure to the south and low to the north means the winds come from the south which would generally be warmer.
The ocean also plays a moderating role. So if winds blow over land, they tend to be more extreme (hot or cold) whereas winds from the ocean probably have less temperature extremes. (broadly speaking)
Huge masses of warm or cold air drift across entire countries. When air masses run into one another, the warm air rises, cools, and loses its moisture to clouds or rain. SVT.se/vader has weather maps for Sweden that show this front activity very well. A warm front (red line) often leads to lingering grey weather and light rain, while cold fronts (blue lines) lead to heavy rain, even thunderstorms, but usually pass quickly. Low pressure areas are often surrounded by fronts, as air masses try to flow into them and start swirling around them.
In spring, even a warm front leads to colder weather on average, because the clouds block the sun.
Depending on geography, winds can carry warm or cold air and moisture from nearby bodies of water. Or warm dry air from deserts etc.
Where I am located in northern Canada, for example right now, it can be -5c early in the morning and reach +15c by 1pm.
“Chinooks” in Alberta move large masses of warm air over the rockies and can raise the temperature from -20c on a January day to +20c and back down again over the course of a couple of hours.
Depending on geography, winds can carry warm or cold air and moisture from nearby bodies of water. Or warm dry air from deserts etc.
Where I am located in northern Canada, for example right now, it can be -5c early in the morning and reach +15c by 1pm.
“Chinooks” in Alberta move large masses of warm air over the rockies and can raise the temperature from -20c on a January day to +20c and back down again over the course of a couple of hours.
Huge masses of warm or cold air drift across entire countries. When air masses run into one another, the warm air rises, cools, and loses its moisture to clouds or rain. SVT.se/vader has weather maps for Sweden that show this front activity very well. A warm front (red line) often leads to lingering grey weather and light rain, while cold fronts (blue lines) lead to heavy rain, even thunderstorms, but usually pass quickly. Low pressure areas are often surrounded by fronts, as air masses try to flow into them and start swirling around them.
In spring, even a warm front leads to colder weather on average, because the clouds block the sun.
Huge masses of warm or cold air drift across entire countries. When air masses run into one another, the warm air rises, cools, and loses its moisture to clouds or rain. SVT.se/vader has weather maps for Sweden that show this front activity very well. A warm front (red line) often leads to lingering grey weather and light rain, while cold fronts (blue lines) lead to heavy rain, even thunderstorms, but usually pass quickly. Low pressure areas are often surrounded by fronts, as air masses try to flow into them and start swirling around them.
In spring, even a warm front leads to colder weather on average, because the clouds block the sun.
Depending on geography, winds can carry warm or cold air and moisture from nearby bodies of water. Or warm dry air from deserts etc.
Where I am located in northern Canada, for example right now, it can be -5c early in the morning and reach +15c by 1pm.
“Chinooks” in Alberta move large masses of warm air over the rockies and can raise the temperature from -20c on a January day to +20c and back down again over the course of a couple of hours.
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