Back in 2006, Japanese mass media began using the term “guerrilla rainstorm” to describe short localized downpours of over 100 mm of rain per hour that appeared suddenly and unexpectedly.
The phenomenon is thought to be a result of rapid development of cumulonimbus clouds near urban areas caused by a combination of heat islands and local winds. The rainstorms have proven incredibly difficult to predict (hence the name “guerilla”) and are known for causing flash floods in urban areas.
The photo you see above is of one such guerrilla rainstorm, taken from Tokyo Skytree on September 1.

Xbox Live hacked? Rumours flood the internet after ominous tweet left by hacker 【News Flash】
Cute sleepy animals captivate Japan, teach us some new vocabulary at the same time!【GIF Gallery】
China’s Photoshop Experts Will Fix Your Bad Photos, But Be Careful What You Wish For
How transparent is acceptable for a girl’s pants? This much, according to one Chinese high school
Chinese Photoshop Trolls Part 3: This Time It’s Personal
Fashion Friends: Twitter Proves Almost Every Japanese College Student Wears the Same Exact Outfit
Chinese Photoshop Trolling Part 2: Now with 20% More Shirtless Men!
The Ten Most Beautiful Tunnels in the World and Where You Can Find Them
Disney Villains Clean Up Well, Wow Japan
Crime of Passion: Three Men Forcibly Deported from Saudi Arabia for Being “Too Handsome”
Real-Life Barbie Gives Her Friends and Family a Makeover, Turns Them into Dolls
Oozing up From Below, Mysterious Marshmallow-like Substance Covers Nanjing Street
We Made Coca-Cola Transparent and Colorless. It Tastes Like…
Peenzilla Worship! Japan’s Kanamara Festival Coming Up this April!
Chinese Woman on Trial for Killing Man by Squeezing His Scrotum
Chinese Student’s Bicycle Seat Breaks and… Gyah!
Before and After: 31 Startling Images of Plastic Surgery in Korea 【Photo Album】
Food Rage: Korean Deported Over In-Flight Ramen Brawl
Japanese iPad artist is the Leonardo da Vinci of digital finger paints 【Video】
Is the fountain of youth located in Japan? New study supports beauty claims of famous Japanese hot spring
Chinese Photoshop Trolling Part 2: Now with 20% More Shirtless Men!
Japanese men have spoken: they don’t like your nail art
Japanese politicians are time lords! Government considers speeding time up by two hours
Star Wars Characters Journey to the West as Classical Chinese Warriors
Freeze the funk out of your shoes this summer
Beautiful 16-Year-Old Ukrainian Girl with Disproportionately Long Neck Teaches Internet About Marfan Syndrome
We answer the age old question: How many McDonald’s fries can one person stuff into their mouth in one sitting?
Philip Kendall
Steven Simonitch
Master Blaster
Kay
Michelle Lynn Dinh
Jessica Ocheltree
Japanese “High School Girl Viewing Clubs” Let Customers Pay for Panty Shots, Unfazed by 2011 Crackdown