The temperature on April 27, 1911 was between 5.1 °C and 11.0 °C and averaged 7.7 °C. There was 8.4 mm of rain. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the southwest. Source: KNMI
January 5 » Kappa Alpha Psi, the world's third oldest and largest black fraternity, is founded at Indiana University.
January 29 » Mexican Revolution: Mexicali is captured by the Mexican Liberal Party, igniting the Magonista rebellion of 1911.
July 4 » A massive heat wave strikes the northeastern United States, killing 380 people in eleven days and breaking temperature records in several cities.
August 21 » The Mona Lisa is stolen by Vincenzo Peruggia, a Louvre employee.
September 18 » Russian Premier Pyotr Stolypin is shot at the Kiev Opera House.
December 24 » Lackawanna Cut-Off railway line opens in New Jersey and Pennsylvania.
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The Family tree Van Willigen publication was prepared by Rob van Willigen (contact is not possible).
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