Swell (picture)

The swell may travel for thousands of miles before dying away. As the swell wave advances, its crest becomes flattened and rounded and its surface smooth. Swell waves are characterized by a relatively long and regular period.



Weather Facts

A is for Air
Accessory clouds
Advection
Air masses and their sources
Air-mass Thunderstorm
Alpine Glow
Altocumulus
Anticyclone
Atmosphere - Diagram
Aurorae - Northern Lights
Average rainfall over England and Wales
Azores High
Banner Cloud - the peak's flag
Beaufort Scale
Blizzard
British Weather Terms
Brocken Spectre
Bubble High
Burning Time
CAPE - Convective Available Potential Energy
Cap cloud
Cc floccus
Cc lacunosus
Cc stratiformis
Cc undulatus
Central England Temperature
Centres of action
Ci fibratus
Ci radiatus
Ci spissatus
Ci uncinus
Ci vertebratus
Cirrocumulus
Cirrostratus
Cirrus
Clocks go Back from BST to GMT
Cloud classification
Cloud seeding
Cloud species
Cloud streets
Cloud types (genera)
Cloud variety
Clouds - sentry of the sky
Cold low
Comma Cloud
Convection
Coriolis effect
Corona
Crepuscular rays
Cut-off low
Dew
Dew Point
Discovery of the Jet Stream
Doppler radar
Drifting snow - blowing snow
Drought
Earth's Atmosphere
El Nino
Föhn (foehn) wind
Föhn wall
Flash Flood
Fog and Mist
Fogbow
Forecasting weather
Frost hollow
Fujita Scale Statistics
Fujita Tornado Scale
Funnel cloud
Genoa Low
Geostationary Satellites
Geostrophic Wind
Glaze and Black Ice
Glory
Grass Minimum Temperature
Gulf Stream (Satellite)
Gustnado
Hailstorms in Britain
Hail
Highs and Lows and Winds
History of Hurricane Names
Hoar Frost
Humidity
Inversions
Isobars on surface maps
Jack Frost
Jet stream cirrus from space
Katabatic winds
Key to our weather symbols
Lake-effect snow
Latent Heat
Levanter cloud
Lightning strike
Millibar and hectopascal
Mirages
Mizzle
NOAA satellites
Nimbostratus
North Atlantic Drift (Gulf Stream)
Polar Orbiting Satellites
Polar low - the arctic hurricane
Precipitation Map
Radiosonde
Rain gauge
Rime
Roll cloud
Rotor cloud
Saffir-Simpson scales
Sc duplicatus
Sc perlucidus
Sc undulatus
Shelf Cloud
Sometimes a bit fishy
Sounding
Southern Oscillation
St. Swithun's Day
Standard Reference Period
Stevenson Screen
Stratocumulus
Stratosphere
Sun pillar
Supercooled clouds
Surface wind
Swell
TORRO
Thermocline
Thunderstorm Probability
Thunderstorms
Tornado Alley
Troposphere
Troposphere - Diagram
UV Index
Ultraviolet radiation
Virga or Fallstreak
What Makes Northern Lights Happen?
What does it mean?
Where Lightning Strikes
Why Skies are Blue
Why Thunder Rumbles
World Meteorological Organisation (WMO)