The temperature on July 5, 1889 was about 23.2 °C. The air pressure was 16 kgf/m2 and came mainly from the north-northwest. The airpressure was 76 cm mercury. The atmospheric humidity was 55%. Source: KNMI
January 30 » Archduke Crown Prince Rudolf of Austria, heir to the Austro-Hungarian crown, is found dead with his mistress Baroness Mary Vetsera in the Mayerling.
February 22 » President Grover Cleveland signs a bill admitting North Dakota, South Dakota, Montana and Washington as U.S. states.
May 31 » Johnstown Flood: Over 2,200 people die after a dam fails and sends a 60-foot (18-meter) wall of water over the town of Johnstown, Pennsylvania.
October 24 » Henry Parkes delivers the Tenterfield Oration, effectively starting the federation process in Australia.
November 8 » Montana is admitted as the 41st U.S. state.
November 11 » The State of Washington is admitted as the 42nd state of the United States.
Day of death March 13, 1956
The temperature on March 13, 1956 was between -4.0 °C and 4.4 °C and averaged -0.2 °C. There was 9.4 hours of sunshine (81%). The almost cloudless was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the northeast. Source: KNMI
April 3 » Hudsonville–Standale tornado: The western half of the Lower Peninsula of Michigan is struck by a deadly F5 tornado.
May 1 » The polio vaccine developed by Jonas Salk is made available to the public.
June 23 » The French National Assembly takes the first step in creating the French Community by passing the Loi Cadre, transferring a number of powers from Paris to elected territorial governments in French West Africa.
September 9 » Elvis Presley appears on The Ed Sullivan Show for the first time.
October 21 » The Mau Mau Uprising in Kenya is defeated.
October 31 » Suez Crisis: The United Kingdom and France begin bombing Egypt to force the reopening of the Suez Canal.
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I78423.php : accessed December 27, 2025), "Willem Poelstra (1889-1956)".
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