Severe Weather Thread

#1,651
#1,651
IPorange said:
You said weather is cyclical, and now you invoke climate. Sort of gets to what I was driving at in the first place, doesn't it?

So you think the argument is only fossil fuels cause warming? This is a straw man that is used time and time again. No one is claiming that fossil fuels are the only driver of climate for all of geologic history, or even now.
And you think that climate scientists aren't using all this information you are referring to, to inform their opinion on the modern situation?

It isn't propaganda, my friend. It's what the evidence is pointing to. Climate has changed throughout time, for all sorts of reasons. Climate is changing differently and for a different reason now


I'm not going to turn this into another GCC thread. I shouldn't have even commented on it. It's just strange to me how folks can dismiss anything and everything as not related to climate change. It makes me
wonder what they think climate change would look like.
Click to expand...


You should change your username from IPorange to IPsettingdown, just an observation.
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#1,659
#1,659
lylsmorr said:
I have to do some research on how exactly the pressure systems cause tornadoes
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Low pressure systems are associated with air uplift, which is what drives precipitation. The stronger the low pressure cell, the more uplift and the more severe the weather associated with it due to the mixing of the air masses.
 
#1,662
#1,662
We're now under a tornado watch until 10.00. West TN, N. Mississippi, & E. Arkansas. More and more likely that I'm going to have to invest in a storm shelter or safe room of some sort when I buy a house.
 
#1,663
#1,663
MemphianVol said:
We're now under a tornado watch until 10.00. West TN, N. Mississippi, & E. Arkansas. More and more likely that I'm going to have to invest in a storm shelter or safe room of some sort when I buy a house.
Click to expand...

I WILL have a basement or storm shelter wherever I decide to move to.
 
#1,665
#1,665
IPorange said:
Low pressure systems are associated with air uplift, which is what drives precipitation. The stronger the low pressure cell, the more uplift and the more severe the weather associated with it due to the mixing of the air masses.
Click to expand...

Add to that, winds in the upper atmosphere(jet stream) are in excess of +100 mph. The current jet stream is moving from west to east, right over this area, while the surface winds are moving in from the south at 25+.

Not good
 
#1,666
#1,666
scaled.php
 
#1,667
#1,667
Sun is out right now in Memphis with TorCon values at 9. I don't like the dynamics of this system with dewpoints currently at 69. If those dew points keep rising, that will be just more fuel to the fire. I'm afraid it's gonna be a long day for us folks in West TN.
 
#1,668
#1,668
IPorange said:
Low pressure systems are associated with air uplift, which is what drives precipitation. The stronger the low pressure cell, the more uplift and the more severe the weather associated with it due to the mixing of the air masses.
Click to expand...

Low pressure=warmer temps if I'm getting my physics right, correct?
 
#1,669
#1,669
gordonr24 said:
Sun is out right now in Memphis with TorCon values at 9. I don't like the dynamics of this system with dewpoints currently at 69. If those dew points keep rising, that will be just more fuel to the fire. I'm afraid it's gonna be a long day for us folks in West TN.
Click to expand...

:thumbsup:
 
#1,671
#1,671
gordonr24 said:
Sun is out right now in Memphis with TorCon values at 9. I don't like the dynamics of this system with dewpoints currently at 69. If those dew points keep rising, that will be just more fuel to the fire. I'm afraid it's gonna be a long day for us folks in West TN.
Click to expand...
Yep. In Oakland it is 85* (feels like 90*) with a 71* DP.
 
#1,672
#1,672
curwx_600x405.jpg


lyslmorr, in this image, you can see a cold front swinging over Texas, which a warm air mass is over the SE. Cold air acts like a cross between a spatula and a bulldozer, scooping up warm air. As that warm air rises above the cold air at the front (because warm air is less dense than cold air), that air rapidly cools due to decreasing pressure above it. Eventually it cools to it's dewpoint, forming clouds. It continues to still be relatively warmer than the surrounding air high in the troposphere, and thus continues to rise. Thus, the air is cooling and losing capacity to hold water vapor, and it rains. The act of precipitation falling through the clouds and the atmosphere's electric field generates static charges, leading to lightning and thunderstorms. So the more rapid vertical uplift, the more lightning.

Tornadoes come in when the down drafts in the storm system cause a need to replace that subsiding air on the front side of the system, with air from near the surface on the backside. Sometimes, for reasons that are still not fully understood, this can form intense cyclonic actions of uplift that we know as tornadoes. So the more different the air masses associated with a mid latitude low pressure cell, and the more intense the uplift, the more likely for tornadoes and strong tornadoes to form.

tornDevFull.jpg
 
#1,673
#1,673
lylsmorr said:
Low pressure=warmer temps if I'm getting my physics right, correct?
Click to expand...

It's all relative, but ya. It means cold air overtaking a warm air mass. It's the warm air rising by being displaced by the dense cold air that is causing the low pressure.
 
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