cyclone

In meteorology, a cyclone is a large scale air mass that rotates around a strong center of low atmospheric pressure. They are usually characterized by inward spiraling winds that rotate counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere. All large-scale cyclones are centered on low-pressure areas. The largest low-pressure systems are polar vortices and extratropical cyclones of the largest scale (synoptic scale). According to the National Hurricane Center glossary, warm-core cyclones such as tropical cyclones and subtropical cyclones also lie within the synoptic scale. Mesocyclones, tornadoes and dust devils lie within the smaller mesoscale. Upper level cyclones can exist without the presence of a surface low, and can pinch off from the base of the Tropical Upper Tropospheric Trough during the summer months in the Northern Hemisphere. Cyclones have also been seen on extraterrestrial planets, such as Mars and Neptune. Cyclogenesis describes the process of cyclone formation and intensification. Extratropical cyclones begin as waves in large regions of enhanced mid-latitude temperature contrasts called baroclinic zones. These zones contract and form weather fronts as the cyclonic circulation closes and intensifies. Later in their life cycle, extratropical cyclones occlude as cold air masses undercut the warmer air and become cold core systems. A cyclone's track is guided over the course of its 2 to 6 day life cycle by the steering flow of the subtropical jet stream.
Weather fronts mark the boundary between two masses of air of different temperature, humidity, and densities, and are associated with the most prominent meteorological phenomena. Strong cold fronts typically feature narrow bands of thunderstorms and severe weather, and may on occasion be preceded by squall lines or dry lines. Such fronts form west of the circulation center and generally move from west to east; warm fronts form east of the cyclone center and are usually preceded by stratiform precipitation and fog. Warm fronts move poleward ahead of the cyclone path. Occluded fronts form late in the cyclone life cycle near the center of the cyclone and often wrap around the storm center.
Tropical cyclogenesis describes the process of development of tropical cyclones. Tropical cyclones form due to latent heat driven by significant thunderstorm activity, and are warm core. Cyclones can transition between extratropical, subtropical, and tropical phases. Mesocyclones form as warm core cyclones over land, and can lead to tornado formation. Waterspouts can also form from mesocyclones, but more often develop from environments of high instability and low vertical wind shear. In the Atlantic and the northeastern Pacific oceans, a tropical cyclone is generally referred to as a hurricane (from the name of the ancient Central American deity of wind, Huracan), in the Indian and south Pacific oceans it is called a cyclone, and in the northwestern Pacific it is called a typhoon.

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  1. sergiup

    For Sale LGA1700 stock cooler (from i7-12700)

    Free, just pay for postage please. An LGA1700 cooler (from an i7-12700, never used) Sold: A Sumvision Cyclone X4 Android media box, I think I started to set it up at one point, and then just boxed it away to never be used again. Working as far as I know, have no reason to think otherwise. An...
  2. N

    Sumvision Cyclone cheap alternative

    Well, as they do every few years, my little Sumvision Cyclone media player is showing its age and getting a bit twitchy. Time to replace. Are they still about the best option for £30 - £40 - that will play practically everything you throw at them, or are there any new kids on the block in the...
  3. 5

    Troubleshooting the WLToys Cyclone

    Hi, I know it's an old drone, but I've had the WLToys V262 Cyclone for several years now, and it recently started just not really flying. At first it was one of the motors, and that was just broken so I replaced that, and now it's a new problem. It will take off a few inches, and despite giving...
  4. S

    Question Cyclone 3 replacement USB adapter cable

    The microUSB plug (male) to USB socket (female) adapter cable on my old Cyclone 3 media player is now loose and keeps losing contact with the USB stick. There seem to be a bunch of different sizes of microUSB plug : can anyone point me to a replacement cable that would work on the Cyclone? It's...
  5. S

    Question Cyclone 2+ media problem

    Hello, I've been a happy owner of a Sumvision Cyclone 3 which recognized all my USB sticks and played 90% of my media files, MKV, MP4, MPG etc. I recently bought a Cyclone 2+ but find it does not recognize half my USB sticks regardless of how they have been formatted, nor does it play half those...
  6. N

    Question UHD replacement for a Sumvision Cyclone

    Hi folks, Is there a modern UHD equivalent of my old Sumvision Cyclone HD? Ideally I want a similar basic "big hard drive in a box with HDMI and coaxial ports" I can play 4K content off. All the machines I've found discussed here (like the Zidoo X10 / Z10) seem to bring home networking / remote...
  7. E

    Sumvision Cyclone Primus V2 Memory

    Hi Folks. Newbie here with my first posting. The memory on my Primus V2 is full. I am attempting tidying up of a folder in order to add files to another folder. ie. I want to remove the data in folder 1 in order to add files to folder 2. The removal of folder 1 is obviously straight...
  8. K

    cyclone primus v2 subtitles

    I have an MP4 file of a swedish tv show on my pc. When I play it on the pc with VLC I can select English subtitles and they appear decently sized and clear. However, when I put it on a memory stick and play it through the cyclone primus v2 connected to my TV no subtitles appear and when i press...
  9. K

    Cyclone Primus V2: silly problem

    I feel like a complete idiot, but here goes. Just bought a new Cyclone Primus V2 and want to put in a hard drive. Thing is, I can't get the bloody thing open! There are four screws on the base which turn but don't extract, and turning them doesn't seem to give any form of release. I don't want...
  10. J

    Question (old) Sumvision Cyclone, stopped working ?

    Been using a Sumvision Cyclone Media Player (not the enclosure) for a few years now. Worked fine. Yesterday, instead of the screensaver, the TV just said "no input". Power cycling the box causes the TV to flick, and the "HDMI" input to become active. But nothing else. Just in case I tried the...
  11. J

    Question Sumvision Cyclone X2 Smart Media Enclosure

    Hi I have one of these Android 4.1.2 boxes and I have a few questions: (a) When I try to enable bluetooth nothing happens. The button goes grey for several seconds and then returns to the off position. Does this box actually have bluetooth support? If not can I add support using a USB dongle...
  12. S

    Minor Cyclone 4 problems

    I love the Cyclone series but am having minor problems with version 4 and would appreciate some help. 1. I use subtitles wherever possible and as far as I remember on previous versions you could set subtitles to display automatically. I can't seem to do this on the 4 though. OK, it only means...
  13. mikethemadmonk

    Sumvision Cyclone Micro 4

    This model arrived this morning but compared to my cyclone 2, this is a devil to setup! I made the mistake of enabling wi-fi. It found my workgroup and listed all the users therein but will not recognize my user name or the password. All I want to do is set it back to factory settings but that...
  14. H

    Sumvision Cyclone 4 manual

    I have a Sumvision Cyclone 4, great little device but i would like a manual, I think i would find rocking horse shit easier. Anyone know where i can find one please.
  15. F

    Sumvision Cyclone 4+ how to get AV out?

    Hello everyone, I've decided to replace my trusty ASUS Oplay with a Sumvision Cyclone 4+. I'm trying to connect this up via composite + LR audio to a scart socket with no joy at all. The "manual" for the 4+ says "Use the HDMI Cable to connect box with your TV Set. (Please try to use AV cable to...
  16. I

    Sumvision Cyclone X8

    Hi. I have an octacore x8 cyclone from sumvision. The problem with it is I cannot open an app and have it open for more than a minute without it closing and taking me back to the main desktop. At first I thought it was just kodi, but now it's any app including even the settings. I think that a...
  17. mckster

    SUMVISION Cyclone X4

    Guys, I have the Quad Core X4 Sumvision Android box which works brilliantly well. As a result I recommended this to a friend who also purchased one. I have set it all up for with the showbox app but for some reason it won't stream films on her tv. The app launches fine and you choose the...
  18. P

    Question Sumvision Cyclone Primus v2 - connected to network and accessed via TV

    Hello. I don't seem to be able to access the hdd from the menu when Cyclon Primus is connected to the router for network access. As soon as I disconnect the the USB cable, the menu restarts and I can scroll down to browse the disk, view photos or watch videos. Is it normal? Thanks in advance...
  19. A

    sumvision cyclone mini pc win10

    Silly question probably but I need to access bios and cannot find how to do this any advise appreciated. thanks
  20. Girlnextdoor

    Question Cyclone Primus V2 problem please help!

    Re:Cyclone Primus V2 problem please help! Hi, I have had a 2TB Cyclone Primus V2 for nearly 2 years; I have never had any problems until now. It has started making whirring noises when switched on (doesn't make them on stand by), it then would randomly stop being able to see/read/open it's hard...
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