MET4300_SWX_LEC16

MET4300_SWX_LEC16 - MET 4300 Lecture 16 Freezing...

Info iconThis preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon
MET 4300 Lecture 16 Freezing Precipitation
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Freezing Precipitation Hazards Freeze on surface and form ice glaze; Slick Roads Loading of power lines, antennas, trees Slip and fall Aircraft icing Accounts for 20% of wintertime weather injuries
Background image of page 2
Types of Freezing Precipitation Freezing Drizzle: (aircraft icing) Supercooled water: Liquid at temperatures < 0 o C because of lack of freezing nuclei Supercooled warm rain process: tiny cloud droplets grow to precipitation size by colliding and coalescing with each other Supercooled liquid raindrops that falls to the surface and freezes producing glaze Ice Freezing rain: Melting process: snow falls from high in the clouds into an atmospheric layer where T > 0 o C. Snowflakes melt into raindrops within this layer As raindrops continue to fall into a subfreezing (T < 0 o C) layer of air near ground, refreezing can occur after in contact with surface objects.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
How Does Freezing Rain Happen? --Inversion is crucial -- Ice Pellets: frozen raindrops, do NOT pose big problem because particles do not stick
Background image of page 4
A Sounding With Warm Air Aloft
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
How Does Freezing Drizzle Happen? Drizzle: 0.2-0.5 mm diameter; Often form in shallow cloud layers with 1-3 km depths; Often associate an Arctic front At surface, cause minor glaze, traffic and pedestrian accidents; Upper level: aircraft icing
Background image of page 6
Aircraft Icing
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Weather Patterns for Freezing Rain Artic front/Artic High: --Fronts advance SE and stall
Background image of page 8
Image of page 9
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/18/2012 for the course MET 4300 taught by Professor Staff during the Spring '08 term at FIU.

Page1 / 22

MET4300_SWX_LEC16 - MET 4300 Lecture 16 Freezing...

This preview shows document pages 1 - 9. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online