Lect 16 - THUNDERSTORMS * a storm characterized by a...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
THUNDERSTORMS ** a storm characterized by a cumulonimbus (Cn) cloud & accompanied by lightning and thunder * on average of relatively short duration, 1 - 3 hours, but may last for up to 12 hours or more * severe thunderstorms are accompanied by strong winds, heavy rain, and * they are a good indication of great instability in the atmosphere and show a great deal of vertical development Requirements for Formation: * Warm, moist air: which releases Latent Energy when lifted and condensation occurs; this provides buoyancy, maintains lift develops updrafts * High surface temperatures: enhances instability, air parcel warming & uplift Stages of Formation: * Cumulus stage : initial build-up of cumulus clouds fueled by updrafts (up to 160 kph) of warm, moist air cooling adiabatically; droplet formation by * Mature stage : raindrops start to fall initiating downdrafts ; process of entrainment, the influx of cool, dry surrounding air helping to fuel the downdrafts; heavy rains, lightning, thunder are most intense during this stage. It is also during this stage that hail or a tornado may occur. * Dissipating stage : downdrafts dominate ; light rain; cooling with loss of warm air source & energy; storm breaks up & clouds evaporate Locations of Occurrence: can occur in many parts of the world: tropical areas,
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/07/2011 for the course GEOG 1111 taught by Professor Hopkins during the Fall '08 term at University of Georgia Athens.

Page1 / 4

Lect 16 - THUNDERSTORMS * a storm characterized by a...

This preview shows document pages 1 - 2. Sign up to view the full document.

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