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In San Francisco, there were 35 inches of precipitation in December 1861–January 1862, and almost 50 for the season. [16] There were four distinct rainy periods: The first occurred on December 9, 1861, the second on December 23–28, the third on January 9–12, and the fourth on January 15–17.
Average yearly precipitation for Illinois varies from 48 inches or 1,220 mm at the southern tip to 35 inches or 890 mm in the northern portion of the state. Normal annual snowfall exceeds 38 inches or 0.97 m in Chicago , while the southern portion of the state normally receives less than 14 inches or 0.36 m. [ 1 ]
In the Great Flood of 1862, San Francisco receives 24.49 inches (622.0 mm) of rainfall for January, its highest monthly rainfall on record, and the “rain year” total from July 1861 to June of 49.27 inches (1,251.5 mm) is also the highest ever. [1]
Between April 11 and May 12, heavy rain in the Mississippi River Valley necessitated the opening of the Bonnet Carre Spillway for the first time in 11 years. 160 bays were opened for 31 days. Red River Landing crested at 60.68 feet (18.50 m) on April 24, the 3rd highest on record . [5]
The greatest amount of precipitation that fell in a 24-hour period was 9.35 in (237.5 mm) on August 13–14, 1987. That event also set the records for heaviest 6 and 12 hour rainfall amounts and contributed to August 1987's record rainfall. The heaviest calendar day snowfall was 18.6 in (47.2 cm), again at O'Hare, on January 2, 1999. [18]
In May 2013, Illinois' state (public) universities, colleges, and community colleges agreed, pending formation and passage of the legislation before the end of the state's legislative session, at Illinois House Speaker Michael Madigan and other members' repeated urging, to gradually assume more of the burden- half of a percent of the retirement ...
Here are rainfall amounts, in inches, from the last 24 hours (unless otherwise noted) by locality, according to National Weather Service St. Louis: Illinois locations. Belleville: 6.23, 6.33 ...
Illinois' ecology is in a land area of 56,400 square miles (146,000 km 2); the state is 385 miles (620 km) long and 218 miles (351 km) wide and is located between latitude: 36.9540° to 42.4951° N, and longitude: 87.3840° to 91.4244° W, [1] with primarily a humid continental climate.