Spring (season)

Information about Spring (season)

Part of the Nature series on
Weather
 
Seasons
Temperate
• Spring • Summer •
• Autumn • Winter •
Tropical
• Dry season •
• Wet season
Storms
• Thunderstorm • Tornado •
• Tropical Cyclone (Hurricane) •
• Winter storm • Blizzard
Precipitation
• Fog • Drizzle • Rain •
• Freezing rain • Sleet •
• Hail • Snow
Topics
• Meteorology •
• Weather forecasting •
• Climate • Air pollution •
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Seasons
Temperate
Spring
Summer
Autumn
Winter
Tropical
Dry
season		Cool
Hot
Wet season


Spring is one of the four seasons of the temperate zones, the transition from winter into summer.

Dates of spring

There are different views on when the season starts and finishes.

The Merriam-Webster dictionary states that spring comprises "in the northern hemisphere usually the months of March, April, May, or as reckoned astronomically extending from the vernal equinox (March 21) to the June solstice (June 21)."

Chambers 21st Century Dictionary states that spring is "the season between winter and summer, when most plants begin to grow, and usually thought of in the N hemisphere as consisting of the months from March to May inclusive, and in the S hemisphere as September to November".[1]

The UK Met Office also considers that spring consists of the months of March, April and May.[2].

The Oxford English Dictionary says that spring is "in the N. hemisphere from March to May and in the S. hemisphere from September to November".

Cambridge Advanced Learner's Dictionary considers that spring lasts "from March to June north of the equator, and from September to December south of the equator".[3]

In Australia, spring begins on the first of September and finishes on the thirtieth of November.

Spring Fling

As in summer, the axis of the Earth is tilted toward the Sun, and the length of daylight hours rapidly increases as latitude increases. The hemisphere begins to warm significantly, causing new plant growth to "spring forth", giving the season its name (see Effect of sun angle on climate). Snow begins to melt, and rivers and streams swell with runoff and spring rains. Most flowering plants bloom this time of year, in a long succession beginning even when snow is still on the ground, and continuing into early summer. In normally snowless areas, "spring" may begin as early as February during warmer years, with subtropical areas having very subtle differences, and tropical ones none at all. Subarctic areas may not see "spring" at all until May or even June, or December in the outer Antarctic.

Enlarge picture
Dandelion in spring
Severe weather most often occurs during the spring, when warm air begins to invade from lower latitudes while cold air is still pushing from the polar regions. Flooding is also most common in and near mountainous areas during this time of year due to snowmelt, many times accelerated by warm rains. In the United States, Tornado Alley is most active by far this time of year, especially since the Rocky Mountains prevent the surging hot and cold air masses from spreading eastward and instead force them directly at each other. Besides tornadoes, supercell thunderstorms can also produce dangerously large hail and very high winds, for which a severe thunderstorm warning or even tornado warning is usually issued. Often, spring storms trigger dozens of warnings, one right after the other, often simultaneously along a line hundreds of miles or kilometers long. Even more so than winter, the jet streams play an important role in severe weather in the Springtime.

The hurricane season officially begins in late spring, on May 15 in the northeastern Pacific, and June 1 in the northern Atlantic. Before these dates, hurricanes are almost unheard of and even tropical storms are rare, one of the earliest ever being Tropical Storm Ana in mid-April 2003. Even in June, hurricanes are uncommon, as 21 of June's days are spring.

Springtime is seen as a time of growth, renewal, of new life (both plant and animal) being born, and of the cycle of life once again starting. It is also used more generally as the start of better times, as in Prague Spring.

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Seasons
Nature, in the broadest sense, is equivalent to the natural world, physical universe, material world or material universe. "Nature" refers to the phenomena of the physical world, and also to life in general.
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weather is the set of all extant phenomena in a given atmosphere at a given time. The term usually refers to the activity of these phenomena over short periods (hours or days), as opposed to the term climate, which refers to the average atmospheric conditions over longer periods of
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Seasons

Temperate
Spring
Summer
Autumn
Winter
Tropical
Dry
season Cool
Hot
Wet season

A season is one of the major divisions of the year, generally based on yearly periodic changes in weather.
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temperate latitudes of the globe lie between the tropics and the polar circles. The changes in these regions between summer and winter are generally mild, rather than extreme hot or cold. However, a temperate climate can have very unpredictable weather.
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Summer is one of the four seasons of the year. In the West, the seasons are generally considered to start at the equies and solstices, based on astronomical reckoning. In English-language calendars, based on astronomy, summer begins on the day of the summer solstice and ends on the
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Autumn (also known as Fall in North American English) is one of the four temperate seasons. Autumn marks the transition from summer into winter. In the northern hemisphere, the start of autumn is generally considered to be around September and in the southern hemisphere, its
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Winter is one of the four seasons of temperate zones. Almost all English-language calendars, going by astronomy, state that winter begins on the winter solstice, and ends on the spring equinox.
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tropics are the geographic region of the Earth centered on the equator and limited in latitude by the Tropic of Cancer in the northern hemisphere, at approximately 23°30' (23.5°) N latitude, and the Tropic of Capricorn in the southern hemisphere at 23°30' (23.5°) S latitude.
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For the 2006 Chadian film, see .


The Dry season is a term commonly used when describing the weather in the tropics. The weather in the tropics is dominated by the tropical rain belt, which oscillates from the northern to the southern tropics over
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A Wet season or rainy season is a season in which the average rainfall in a region is significantly increased. The term green season is also sometimes used as a euphemism by tourist authorities. These terms are commonly used describing the weather in the tropics.
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storm is any disturbed state of an astronomical body's atmosphere, especially affecting its surface, and strongly implying severe weather. It may be marked by strong wind, thunder and lightning (a thunderstorm), heavy precipitation, such as ice (ice storm), or wind transporting
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thunderstorm, also called an electrical storm or lightning storm, is a form of weather characterized by the presence of lightning and its attendant thunder produced from a cumulonimbus cloud.
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tornado is a violently rotating column of air which is in contact with both a cumulonimbus cloud or, in rare cases, a cumulus cloud base and the surface of the earth. Tornadoes come in many sizes but are typically in the form of a visible condensation funnel, whose narrow end
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tropical cyclone is a meteorological term for a storm system characterized by a low pressure system center and thunderstorms that produces strong wind and flooding rain. A tropical cyclone feeds on the heat released when moist air rises and the water vapor it contains condenses.
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winter storm is a meteorological event in which the dominant varieties of precipitation are forms that only occur at cold temperatures, such as snow or sleet, or a rainstorm where ground temperatures are cold enough to allow ice to form (i.e. freezing rain).
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blizzard is a severe winter storm condition characterized by low temperatures, strong winds, and heavy blowing snow. Blizzards are formed when a high pressure system, also known as a ridge, interacts with a low pressure system; this results in the advection of air from the high
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precipitation (also known as hydrometeor) is any product of the condensation of atmospheric water vapor that is deposited on the earth's surface. It occurs when the atmosphere (being a large gaseous solution) becomes saturated with water vapour and the water condenses and
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FOG can be an acronym for...
  • the tool "Flexible Object Generator"
  • the tool "Fragmented-Object Generator"
  • Fiber Optic Gulf - a submarine telecommunications cable linking the United Arab Emirates, Qatar, Bahrain, and Kuwait
  • Fibre optic gyroscope

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Drizzle is light precipitation consisting of liquid water drops smaller than that of rain, and generally smaller than 0.5 mm (0.02 in.) in diameter.
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Rain is a type of precipitation, a product of the condensation of atmospheric water vapor that is deposited on the earth's surface. It forms when separate drops of water fall to the Earth's surface from clouds.
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Freezing Rain is a type of precipitation that begins as snow at higher altitude, falling from a cloud towards earth, melts completely on its way down while passing through a layer of air above freezing temperature, and then
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Sleet is a term used in a variety of ways to describe precipitation intermediate between rain and snow but distinct from hail.
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Hail is a form of precipitation which consists of balls or irregular lumps of ice (hailstones). Hailstones on Earth usually consist mostly of water ice and measure between 5 and 50 millimetres in diameter, with the larger stones coming from severe thunderstorms.
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SNOW 1.0 and 2.0 are two word-based synchronous stream ciphers developed by Thomas Johansson and Patrik Ekdahl at Lund University.

SNOW 1.0, originally simply SNOW, was submitted to the NESSIE project.
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Meteorology (from Greek: μετέωρον, meteoron, "high in the sky"; and λόγος, logos, "knowledge") is the interdisciplinary scientific study of the atmosphere that focuses on weather processes and
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Weather forecasting is the application of science and technology to predict the state of the atmosphere for a future time and a given location.

Human beings have attempted to predict the weather since time immemorial.
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Climate is the average and variations of weather over long periods of time. Climate zones can be defined using parameters such as temperature and rainfall.
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Seasons

Temperate
Spring
Summer
Autumn
Winter
Tropical
Dry
season Cool
Hot
Wet season

A season is one of the major divisions of the year, generally based on yearly periodic changes in weather.
..... Click the link for more information.
temperate latitudes of the globe lie between the tropics and the polar circles. The changes in these regions between summer and winter are generally mild, rather than extreme hot or cold. However, a temperate climate can have very unpredictable weather.
..... Click the link for more information.

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