Freezing drizzle

Formation

Although freezing drizzle and freezing rain are similar in that they both involve liquid precipitation at the surface in subfreezing temperatures, the mechanisms leading to their development are entirely different. Where freezing rain forms when frozen precipitation falls through a melting layer, freezing drizzle forms via the supercooled warm-rain process, in which cloud droplets coalesce until they become heavy enough to fall out of the cloud.[2] Despite this process taking place in a subfreezing environment, the liquid water will not freeze if the environmental temperature is above 18 °F (−8 °C).[3] If ice crystals are already present in this environment, the liquid droplets will freeze onto these crystals and be effectively removed before they can grow large enough to fall out of the cloud. As a result, freezing drizzle develops in shallow stratus-type clouds where saturation occurs entirely below the layer in which ice crystals can develop and grow.[2]

Effects

When freezing drizzle accumulates on land, it creates an icy layer of glaze. Freezing drizzle alone does not generally result in significant ice accumulations due to its light, low-intensity nature. However, even thin layers of slick ice deposited on roads as black ice can cause extremely hazardous conditions resulting in vehicle crashes.

Freezing drizzle is extremely dangerous to aircraft, as the supercooled water droplets will freeze onto the airframe, degrading aircraft performance considerably. The loss of American Eagle Flight 4184 on October 31, 1994, has been attributed to ice buildup due to freezing drizzle aloft.[2]

gollark: Support for `b` has been added.
gollark: Hold on, that will be patched in v6.12468.
gollark: - All this useless random junk can autoupdate (this is probably a backdoor)!- EZCopy allows you to easily install potatOS on another device, just by sticking it in the disk drive of any potatOS device!- fs.load and fs.dump - probably helpful somehow.- Blocks bad programs (like the "Webicity" browser).- Fully-featured process manager.- Can run in "hidden mode" where it's at least not obvious at a glance that potatOS is installed.- Convenient, simple uninstall with the "uninstall" command.- Turns on any networked potatOS computers!- Edits connected signs to use as ad displays.- A recycle bin.- An exorcise command, which is like delete but better.- Support for a wide variety of Lorem Ipsum.
gollark: Best viewed in Internet Explorer 6.00000000000004 running on a Difference Engine emulated under MacOS 7 on a Pentium 3. Features:- Fortunes/Dwarf Fortress output/Chuck Norris jokes on boot (wait, IS this a feature?)- (other) viruses (how do you get them in the first place? running random files like this?) cannot do anything particularly awful to your computer - uninterceptable (except by crashing the keyboard shortcut daemon, I guess) keyboard shortcuts allow easy wiping of the non-potatOS data so you can get back to whatever nonsense you do fast- Skynet (rednet-ish stuff over websocket to my server) and Lolcrypt (encoding data as lols and punctuation) built in for easy access!- Convenient OS-y APIs - add keyboard shortcuts, spawn background processes & do "multithreading"-ish stuff.- Great features for other idio- OS designers, like passwords and fake loading (est potatOS.stupidity.loading [time], est potatOS.stupidity.password [password]).- Digits of Tau available via a convenient command ("tau")- Potatoplex and Loading built in ("potatoplex"/"loading") (potatoplex has many undocumented options)!- Stack traces (yes, I did steal them from MBS)- Backdoors- er, remote debugging access (it's secured, via ECC signing on disks and websocket-only access requiring a key for the other one)
gollark: <@111608748027445248> ALL OF THEM.

See also

References
  1. Spence, Charles F. (2006). Aim/Far. McGraw Hill Professional. p. 294. ISBN 9780071479240. Retrieved 13 October 2017.
  2. Rauber, Robert M; Walsh, John E; Charlevoix, Donna Jean (2012). Severe & Hazardous Weather. ISBN 9780757597725.
  3. "Freezing Drizzle on January 26th; A Look Into Why". National Weather Service. Retrieved 10 December 2017.


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.