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Monsoon season in southern Asia has begun, and in India the rains arrived ahead of schedule, easing drought concerns. Monsoon rains can be disruptive and even deadly, but crucial for the farmers whose crops feed millions of people. Though concerns for flooding are prevalent, the arrival of the rains brings colorful celebrations and relief from the heat every year. -Leanne Burden Seidel (32 photos total)
An Indian buffalo herder holding a traditional handmade umbrella stands in a field to keep watch of his buffaloes as monsoon clouds hover above in Bhubaneswar, India, on June 13, 2013. (Biswaranjan Rout/Associated Press)     

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The historic flooding throughout central Europe continues, as the Elbe River has broken through several dikes in northern Germany, and the crest of the swollen Danube River has reached southern Hungary, and threatens Serbia. Parts of Austria and the Czech Republic are now in recovery mode, as thousands of residents return home to recover what they can. Gathered here are images from the past several days of those affected by these continuing floods. See earlier entry: Flooding Across Central Europe. [24 photos]

A garden with a swimming pool is inundated by the waters of the Elbe River during floods near Magdeburg in the state of Saxony Anhalt, on June 10, 2013. Tens of thousands of Germans, Hungarians and Czechs were evacuated from their homes as soldiers raced to pile up sandbags to hold back rising waters in the region's worst floods in a decade. (Reuters/Thomas Peter)     

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Tornadoes can form anytime of year, but occur most frequently in April, May, and June, due to favorable weather conditions. Earlier this week a massive 200-mile-per-hour EF5 tornado hit Moore, Okla., killing some two dozen people, damaging thousands of structures, and causing an estimated $2 billion in damage. This year, twisters have already touched down in Kansas, Texas, Tennessee, Mississippi, Missouri, and Alabama. ( 46 photos total)
A woman carries a child through a field near the collapsed Plaza Towers Elementary School in Moore, Okla., on May 20. A tornado as much as half a mile wide with winds up to 200 mph roared through the Oklahoma City suburbs Monday, flattening entire neighborhoods, setting buildings on fire and landing a direct blow on an elementary school. (Sue Ogrocki/Associated Press)     

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We've all seen rain maps for a sliver of time. Screw that. I want to see the total amount of rainfall over a ten-year period. Bill Wheaton did just that in the video above, showing cumulative rainfall between 1960 and 1970. The cool part is that you see mountains appear, but they're not actually mapped.

The hillshaded terrain (the growing hills and mountains) is based on the rainfall data, not on actual physical topography. In other words, hills and mountains are formed by the rainfall distribution itself and grow as the accumulated precipitation grows. High mountains and sharp edges occur where the distribution of precipitation varies substantially across short distances. Wide, broad plains and low hills are formed when the distribution of rainfall is relatively even across the landscape.

See also Wheaton's video that shows four years of rain straight up.

Is there more recent data? It could be an interesting complement to the drought maps we saw a few months ago. [Thanks, Bill]

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After cutting a destructive path through the Caribbean, Hurricane Sandy caused extensive damage along the East Coast this week. Sandy made landfall in southern New Jersey and brought with it major flooding, travel disruption, structural damage, and power outages. New York City was especially hard hit. The storm system was so large ­-- nearly 1,000 miles wide at times -- it brought blizzard conditions to West Virginia and 20 foot waves to Lake Michigan. It is projected Sandy will have caused about $30 billion in damages in the United States. To date, the storm claimed more than 100 lives. -- Lloyd Young ( 57 photos total)
Flooded homes in Tuckerton, N.J., on Oct. 30 after Hurricane Sandy made landfall on the southern New Jersey coastline on Oct. 29. (US Coast Guard via AFP/Getty Images)

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At the suggestion of her 8-year-old daughter, who was watching a weather show on TV, Camille Seaman took to the Great Plains, photographing supercell storms - the type that begets tornadoes.

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