What is virga?


Jill Whamond captured this virga in Calgary, Alberta, Canada on May 28, 2017.

Virga often appears in streaks or shafts extending from the bottoms of clouds. You often see virga over a desert, where low humidity and high temperatures can cause rain to evaporate shortly after being released by clouds. Or you might see virga at high altitudes; in fact, the precipitation often starts out in the form of ice crystals. Virga is commonly seen in the U.S. West and above the Canadian Prairies, in the Middle East, Australia and North Africa. At some northerly latitudes, too – as in the photos from Sweden on this page – virga sometimes paints the sky above.

The word virga is derived from Latin meaning “twig” or “branch”.

It’s an especially dramatic sight at sunrise or sunset.

The photos on this page are from EarthSky friends. Enjoy, and share your pics with us on Facebook or submit them here.

May 31, 2017 in Boden in northern Sweden, by Birgit Bodén.

Virga over Golden Open Space, New Mexico on June 1, 2106. . 6:09 pm. Photo via Jay Chapman.

Virga over Golden Open Space, New Mexico on June 1, 2016 at 6:09 pm. Photo via Jay Chapman.

Timothy Busch caught this virga at sunset in New Mexico.

Timothy Busch caught this virga at sunset in New Mexico.

Susan Jensen captured this image of virga in eastern Washington.

Susan Jensen captured this image of virga in eastern Washington.

Birgit Boden captured virga during a midnight sunset in the month of June, from northern Sweden.

Birgit Boden captured virga during a midnight sunset in the month of June, from northern Sweden.

Ron Ratliff caught this virga near Mexican Hat, Utah.

Ron Ratliff caught this virga near Mexican Hat, Utah.

Virga over Montana, by Jessica Gutliph Karr.

Virga over Montana. Photo via Jessica Gutliph Karr.

Virga over west Texas by Deborah Byrd.

Virga over west Texas. Photo via Deborah Byrd.

Virga over Lancaster County, Pennsylvania. Photo via Beth Katz.

Virga over Lancaster County, Pennsylvania. Photo via Beth Katz.

Virga over Sweden in the month of April, by Jorgen Norrland Andersson.

Virga over Sweden in the month of April. Photo via Jorgen Norrland Andersson.

Enjoying EarthSky? Sign up for our free daily newsletter today!

Bottom line: Virga is rain that evaporates before it reaches the ground. It appears in streaks or shafts extending from the bottoms of clouds. You often see virga over a desert, where low humidity and high temperatures can cause rain to evaporate high in the sky.



from EarthSky http://ift.tt/1HpdJsa

Jill Whamond captured this virga in Calgary, Alberta, Canada on May 28, 2017.

Virga often appears in streaks or shafts extending from the bottoms of clouds. You often see virga over a desert, where low humidity and high temperatures can cause rain to evaporate shortly after being released by clouds. Or you might see virga at high altitudes; in fact, the precipitation often starts out in the form of ice crystals. Virga is commonly seen in the U.S. West and above the Canadian Prairies, in the Middle East, Australia and North Africa. At some northerly latitudes, too – as in the photos from Sweden on this page – virga sometimes paints the sky above.

The word virga is derived from Latin meaning “twig” or “branch”.

It’s an especially dramatic sight at sunrise or sunset.

The photos on this page are from EarthSky friends. Enjoy, and share your pics with us on Facebook or submit them here.

May 31, 2017 in Boden in northern Sweden, by Birgit Bodén.

Virga over Golden Open Space, New Mexico on June 1, 2106. . 6:09 pm. Photo via Jay Chapman.

Virga over Golden Open Space, New Mexico on June 1, 2016 at 6:09 pm. Photo via Jay Chapman.

Timothy Busch caught this virga at sunset in New Mexico.

Timothy Busch caught this virga at sunset in New Mexico.

Susan Jensen captured this image of virga in eastern Washington.

Susan Jensen captured this image of virga in eastern Washington.

Birgit Boden captured virga during a midnight sunset in the month of June, from northern Sweden.

Birgit Boden captured virga during a midnight sunset in the month of June, from northern Sweden.

Ron Ratliff caught this virga near Mexican Hat, Utah.

Ron Ratliff caught this virga near Mexican Hat, Utah.

Virga over Montana, by Jessica Gutliph Karr.

Virga over Montana. Photo via Jessica Gutliph Karr.

Virga over west Texas by Deborah Byrd.

Virga over west Texas. Photo via Deborah Byrd.

Virga over Lancaster County, Pennsylvania. Photo via Beth Katz.

Virga over Lancaster County, Pennsylvania. Photo via Beth Katz.

Virga over Sweden in the month of April, by Jorgen Norrland Andersson.

Virga over Sweden in the month of April. Photo via Jorgen Norrland Andersson.

Enjoying EarthSky? Sign up for our free daily newsletter today!

Bottom line: Virga is rain that evaporates before it reaches the ground. It appears in streaks or shafts extending from the bottoms of clouds. You often see virga over a desert, where low humidity and high temperatures can cause rain to evaporate high in the sky.



from EarthSky http://ift.tt/1HpdJsa

Aucun commentaire:

Enregistrer un commentaire