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Post by nautonnier on Aug 18, 2020 14:18:47 GMT
 Mamatus clouds at sunset  Strange mix of clouds  How persistent contrails become a layer of cirrus. Aircraft follow ground track and leave contrail. Wind moves contrail downwind. Next aircraft follows same ground track and leaves contrail. Repeat for entire day. The route in question is South along the coast in Jacksonville FL airspace toward Miami FL  Stratocumulus same area as the picture above (pelicans a bonus)  Non-persistent contrail - the only aircraft in the sky at height of COVID-19 lockdown |
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Post by nautonnier on Aug 18, 2020 14:22:40 GMT
I thought I would create a thread on clouds how they look and other information. I suspect that like clouds the thread will drift but may provide some interesting thoughts and graphics.
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Post by phydeaux2363 on Aug 18, 2020 15:18:02 GMT
I'm in, Mr. Naut! Like you I live on a southern beach, and see fascinating mixed cloud formations, especially in the summer. I particularly like dawn and dusk shots. As soon as I figure out how to get them off my phone, downloaded into my computer and loaded on this site I'll share some. Ah, the joys of being left behind by technology!
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Post by phydeaux2363 on Aug 18, 2020 15:20:32 GMT
I'm in, Mr. Naut! Like you I live on a southern beach, and see fascinating mixed cloud formations, especially in the summer. I particularly like dawn and dusk shots. As soon as I figure out how to get them off my phone, downloaded into my computer and loaded on this site I'll share some. Ah, the joys of being left behind by technology!
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Post by acidohm on Aug 19, 2020 12:41:37 GMT
Saw my first shelf cloud on Monday, not the most impressive ever considering what does get captured, but satisfying to witness one of the rarer cloud types after many years of looking!
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Post by acidohm on Aug 30, 2020 18:25:07 GMT
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Post by missouriboy on Aug 30, 2020 19:26:18 GMT
Saw my first shelf cloud on Monday, not the most impressive ever considering what does get captured, but satisfying to witness one of the rarer cloud types after many years of looking! Given the number of fronts and thunderstorms we get around here, we often get shelf clouds. Sometimes dramatic ones. But no photos.  Crowds will often come out to watch ... for tornados presumably.  Afterall, you have to be careful, or you could end up in the next county by fast express. |
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Post by Ratty on Aug 31, 2020 11:47:45 GMT
I'm in, Mr. Naut! Like you I live on a southern beach, and see fascinating mixed cloud formations, especially in the summer. I particularly like dawn and dusk shots. As soon as I figure out how to get them off my phone, downloaded into my computer and loaded on this site I'll share some. Ah, the joys of being left behind by technology! I retired from IT support ..... if you could provide airfares, accommodation and masks for my team, we would be delighted to visit and assist. |
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Post by nautonnier on Sept 13, 2020 17:06:51 GMT
A little different picture from my backyard What is this cloud?  Yes it is the smoke trail from a SpaceX Falcon 9 first stage. The first stage then returns to land vertically on a barge off the Atlantic coast of Florida. This is a few minutes earlier  If you look ahead of the first stage smoke trail you should be able to make out the bright spot of the second stage burn This launch was another set of 60 small satellites for the 'Starlink world wide internet project' of Elon Musks "HIGH SPEED INTERNET ACCESS ACROSS THE GLOBE
With performance that far surpasses that of traditional satellite internet, and a global network unbounded by ground infrastructure limitations, Starlink will deliver high speed broadband internet to locations where access has been unreliable, expensive, or completely unavailable.
Starlink is targeting service in the Northern U.S. and Canada in 2020, rapidly expanding to near global coverage of the populated world by 2021."www.starlink.com/ (and page down) |
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Post by missouriboy on Sept 14, 2020 7:35:37 GMT
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Post by nautonnier on Nov 2, 2020 22:40:18 GMT
So walking on the beach today windy cool 75F, 8/8 stratocumulus and the cloud layer was slowly 'burning off' as it does. I got to thinking.
So there are water droplets that form the clouds and as the sun heats them once they have sufficient latent heat of evaporation they evaporate and eventually the entire cloud layer has evaporated. Where the water droplets were is now a layer of humid air that contains ALL THE ENERGY that was used to evaporate the water - a lot of energy - but there has been no temperature change, indeed the layer of air may even have cooled slightly delaying the evaporation of all the cloud. That makes the layer a 'HEAT spot' as all that latent heat is in the water vapor but not a HOT spot
I just wonder if that is measured anywhere and how much of that is included in modeling of clouds?
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Post by Ratty on Nov 2, 2020 23:08:55 GMT
So walking on the beach today windy cool 75F, 8/8 stratocumulus and the cloud layer was slowly 'burning off' as it does. I got to thinking. So there are water droplets that form the clouds and as the sun heats them once they have sufficient latent heat of evaporation they evaporate and eventually the entire cloud layer has evaporated. Where the water droplets were is now a layer of humid air that contains ALL THE ENERGY that was used to evaporate the water - a lot of energy - but there has been no temperature change, indeed the layer of air may even have cooled slightly delaying the evaporation of all the cloud. That makes the layer a ' HEAT spot' as all that latent heat is in the water vapor but not a HOT spot I just wonder if that is measured anywhere and how much of that is included in modeling of clouds? Could be that clouds are hard to model, Naut? |
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Post by missouriboy on Nov 3, 2020 0:33:41 GMT
So walking on the beach today windy cool 75F, 8/8 stratocumulus and the cloud layer was slowly 'burning off' as it does. I got to thinking. So there are water droplets that form the clouds and as the sun heats them once they have sufficient latent heat of evaporation they evaporate and eventually the entire cloud layer has evaporated. Where the water droplets were is now a layer of humid air that contains ALL THE ENERGY that was used to evaporate the water - a lot of energy - but there has been no temperature change, indeed the layer of air may even have cooled slightly delaying the evaporation of all the cloud. That makes the layer a ' HEAT spot' as all that latent heat is in the water vapor but not a HOT spot I just wonder if that is measured anywhere and how much of that is included in modeling of clouds? Could be that clouds are hard to model, Naut? Neil Ferguson can do anything Ratty. Anything! Team him up with Joe and we can find out why Mars no longer has an atmosphere.  |
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Post by nonentropic on Nov 3, 2020 3:30:03 GMT
Neil will want a girl to chase but hay. Yes Naut the enthalpy discussion. The conclusion I have come to is that over an extended period its a wash on a day to day basis not so and frustrating as the logic is clear. A solution could be to weight the latitudinal MC impact of temperature anomalies. Being of very limited capability on a computer I can but describe a potential system and it could improve the outcome but not fix it. So if you do a Willis type of process and band the globe by average TPW as represented on nullschool and then make a bulk shift enthalpy adjustment per latitude you may get a good or better result. earth.nullschool.net/#current/wind/surface/level/overlay=total_precipitable_water/orthographicThis is an MB special. Over and out |
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Post by sigurdur on Nov 3, 2020 3:33:43 GMT
Demonstrate the sensible heat and then we can talk.
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Crowds will often come out to watch ... for tornados presumably. 
Afterall, you have to be careful, or you could end up in the next county by fast express.
