Spring is one of the four temperate seasons. Spring marks the transition from winter into summer. For the usage in virology, see temperate (virology). ... This article or section is in need of attention from an expert on the subject. ... For other uses, see Winter (disambiguation). ... For other uses, see Summer (disambiguation). ...

Dates

According to the astronomical definition, Spring begins on the 21st of March and lasts until 20th of June, the vernal equinox in the northern hemisphere. According to this definition, therefore, the traditional mid-summer's day is the first day of summer. The meteorological definition (used in order to express whether 'Spring' has been hot or cold or wet, for example) has Spring starting on the 1st of March, since this more in line with weather conditions thought to be typical of Spring. The phenological definition of Spring relates to the blossoming of a range of plant species. It therefore varies according to the climate (as in 'Spring comes late to the north-east'). Calendars typically give the first, but the second and third are more in line with common use. Illumination of Earth by Sun on the day of equinox The vernal equinox (or spring equinox) marks the beginning of astronomical spring. ... Northern hemisphere highlighted in yellow. ... This article or section is in need of attention from an expert on the subject. ... Phenology is the study of the times of recurring natural phenomena. ...

In the southern hemisphere, Spring is generally accepted to begin on the 1st of September and last until the 30th of November. southern hemisphere highlighted in yellow (Antarctica not depicted). ...

As in summer, the axis of the Earth is tilted toward the Sun and the length of daylight rapidly increases. The northern hemisphere begins to warm significantly causing new plant growth to "spring forth," giving the season its name. Snow begins to melt and streams swell with runoff and spring rains. Most flowering plants bloom this time of year, in a long succession sometimes 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 experience "spring" at all until May or even June, or December in the outer Antarctic. This article is about Earth as a planet. ... Sol redirects here. ... For other uses, see Snow (disambiguation). ... Subtropical (or semitropical) areas are those adjacent to the tropics, usually roughly defined as the ranges 23. ... The tropics are the geographic region of the Earth centered on the equator and limited in latitude by the two tropics: the Tropic of Cancer in the north and the Tropic of Capricorn in the southern hemisphere. ... The subarctic is a region in the Northern Hemisphere immediately south of the true Arctic and covering much of Canada and Siberia, the north of Scandinavia, northern Mongolia and the Chinese province of Heilongjiang. ... Greek ἀνταρκτικός, opposite the arctic) is a continent surrounding the Earths South Pole. ...

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 because of 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 tornado warning is usually issued. Even more so than winter, the jet streams play an important role in severe weather in the springtime. NOAA scientists observe severe weather using a mobile doppler radar and a helicopter (in the distance) Severe weather phenomena are weather conditions that are hazardous. ... This article is about the geographical term. ... Location of the polar regions Northern Hemisphere permafrost (permanently frozen ground) in purple. ... An outline of Significant Tornado Alley in the United States, where the highest percentage of violent tornadoes occur Tornado Alley is a colloquial term most often used in reference to the area of the United States in which tornadoes are most frequent. ... For individual mountains named Rocky Mountain, see Rocky Mountain (disambiguation). ... This article is about the weather phenomenon. ... Satellite view of a supercell A supercell is a severe thunderstorm with a deep rotating updraft (a mesocyclone) [1]. Supercell thunderstorms are the largest, most severe class of single-cell thunderstorms. ... This article is about the precipitation. ... Severe thunderstorm with a clear slot near main updraft core. ... Tornado at beginning of life. ... For other uses, see jet stream (disambiguation). ...

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. This article is about weather phenomena. ... is the 135th day of the year (136th in leap years) in the Gregorian calendar. ... For other meanings of Pacific, see Pacific (disambiguation). ... is the 152nd day of the year (153rd in leap years) in the Gregorian calendar. ... Atlantic and North Atlantic redirect here. ... 2 B C D 6 7 E 9 F G H I 14 J K L M N O P Categories: | | | | ...

Spring is seen as a time of growth, renewal, of new life (both plant and animal) being born. The term is also used more generally as a metaphor for the start of better times, as in Prague Spring.

People in a café watch Soviet tanks roll past The Prague Spring (Czech: Pražské jaro, Slovak: Pražská jar, Russian: пражская весна) was a period of political liberalization in Czechoslovakia starting January 5, 1968 when Alexander Dubček came to power, and running until August 20 of that year when the...

Nowruz

Main article: Nowruz

The first day of spring is the beginning of the new year, Nowruz, in the Iranian calendar. Nowruz (also Norooz, Newroz, Navroj, and many other variants) marks an important traditional holiday festival celebrated in Iran as well as in many other countries with a significant population from one of various Iranian peoples, such as Azerbaijan, Afghanistan and Tajikistan, and by Kurdish communities in Turkey and Iraq and elsewhere. Several Turkic peoples also celebrate Nowruz. Persepolis all nations stair case. ... Persepolis all nations stair case. ... The Iranian calendar (Persian: ), also known as Persian calendar or (mistakenly) the Jalāli Calendar is an astronomical solar calendar currently used in Iran and Afghanistan as the main official calendar. ... Look up Kurdish in Wiktionary, the free dictionary. ... This article is about the various peoples speaking one of the Turkic languages. ...

Gallery

Colorful Spring garden flowers For other uses, see Garden (disambiguation). ...	Tarrytown, NY in spring Tarrytown is the name of some real places in the United States of America: Tarrytown, New York Tarrytown, Georgia Sleepy Hollow, New York was formerly known as North Tarrytown. ...	A blooming Sour Cherry in spring Image File history File linksMetadata Download high resolution version (2272x1712, 3039 KB) Beschreibung: bühender Kirschenbaum (prunus sp)im Frühling Quelle: FreePiP (Free Pictures Project) Fotograf: Benjamin Gimmel, BenHur See also Image:Frühlingslandschft Aaretal Schweiz. ... Binomial name Prunus cerasus L. The Sour Cherry or Morello Cherry, (Prunus cerasus) is a species of Prunus in the subgenus Cerasus (cherries), native to much of Europe and southwest Asia. ...	|Dandelions in spring Image File history File links Size of this preview: 800 × 375 pixel Image in higher resolution (2256 × 1058 pixel, file size: 484 KB, MIME type: image/jpeg) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Spring (season) ... For other uses, see Dandelion (disambiguation). ...
Encelia farinosa in spring Binomial name Encelia farinosa Torr. ...

References

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Image File history File links Question_book-3. ...

External links

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Spring

Look up spring in Wiktionary, the free dictionary.

• Word Lore
• Online Etymology Dictionary
• Glossary of Meteorology
• Solstice, Equinox & Cross-Quarter Moments for 2008 and other years, for several timezones
• Earth's Seasons, Equinoxes, Solstices, Perihelion, and Aphelion, 2000–2020 (from the United States Naval Observatory's Astronomical Applications Department)
• Seasons and Seasonal Cusps as Pagan and Religious Holidays (from Archaeoastronomy)
• What day does spring start? (BBC,UK News Magazine)

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