Template, Illinois State Water Survey

Press Release

For Immediate Release December 7, 2004
4th Wettest October–November
Jim Angel - (217) 333-0729, Fax: (217) 244-0220, jimangel@illinois.edu
Eva Kingston - (217) 244-7270, Fax: (217) 333-6540, eva@sws.uiuc.edu

“With a 10.03-inch precipitation total, October–November in Illinois is the 4th wettest such period since 1895, 62 percent above normal,” says State Climatologist Jim Angel of the Illinois State Water Survey (http://www.sws.uiuc.edu), a division of the Illinois Department of Natural Resources.

“Although Illinois had the 8th wettest November (4.98 inches, 50 percent above normal) and the 7th wettest October since 1895, fall precipitation is only 15 percent above normal (10.84 inches compared to the normal 9.41 inches). That’s because September was the 4th driest on record,” continues Angel.

Temperatures for November and fall, while still impressive, aren’t quite as extraordinary as the precipitation totals. The average statewide temperature for November, 45.1°F, is 3.4 degrees above normal, the 14th warmest November since 1895. After a cool summer, fall temperatures statewide are 1.8 degrees above normal, the 18th warmest fall since 1895.

Extremes ranged from 86°F at Grand Tower (southern Illinois) on November 1 to 9°F at Monmouth (western Illinois) on November 25. Pittsfield had the highest one-day precipitation total (3.46 inches on November 1), and Waterloo had the highest monthly total (7.84 inches).

A pre-Thanksgiving storm dumped 2–8 inches of snow across central and northern Illinois on November 24, delaying travel. Normal November snowfall ranges from less than an inch in southern Illinois to 1 to 2 inches in central and northern Illinois.

No injuries resulted from two small tornadoes on November 1. There was little damage near Sparta from the first storm. The second storm tore roofs from three barns, destroyed a fourth barn, and damaged a house near Sidney. “Unofficially, this brings the number of tornadoes reported in Illinois this year to 69, still much lower than last year’s record number of 120,” says Angel.

The National Weather Service outlook for December calls for a slightly increased chance of precipitation above normal with an even chance of temperatures above normal, normal, or below normal. The long-range forecast still calls for an increased chance of a drier-than-normal winter in Illinois with an even chance of temperatures above normal, normal, or below normal.

“The current moderate El Niño event in the Pacific Ocean is very similar to El Niño conditions last November. What followed was an Illinois winter with temperatures near normal but precipitation slightly below normal ,” adds Angel.

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