Presentation on theme: "Chicago Area Weather Disasters"— Presentation transcript:
1 Chicago Area Weather Disasters Oak Lawn Tornado 1967Chicago Big Snow 1967Rockford Flash Flood 2006Chicago Blizzard 2011Illinois River Flood 2008Plainfield Tornado 1990Jim Allsopp, National Weather Service, Chicago/RomeovilleFirst Lego League Kickoff September 8, 2013
2 What Kind of Weather Disasters does Chicago Experience? TornadoesRiver Floods/Flash FloodsLightningHailThunderstorm WindsWinter StormsExtreme HeatExtreme ColdDroughtLake Michigan – coastal flood, rip currents, seiche
12 August 28, 1990 - Strongest Oswego – Plainfield – Joliet F5 16 mile path, 1/4 mile wide29 killed, 350 injuredOnly F5 ever in Chicago areaOnly F5 in U.S. in AugustPlainfield
13 Chicago’s Worst Heat Waves Late July Heat Wave in 1916July 26 -July 30 most oppressive period of heat ever in Chicago.Min temp in the 80s for 5 straight nights!1930s Dust Bowl SummersA series of hot dry summers in the 1930s.June of hottest June on record.Chicago's official all time high of 105 set July (109 at Midway on July 23)July 6 through 14, eight 100s in a row at Midway.July 14, hottest day ever over northern IL.112 at Rockford, 111 at Aurora , 104 at Midway.
14 Chicago’s Worst Heat Waves Hot Summers of the 1950s6 of 13 hottest summersJuly hottest month on record.Chicago’s all time hottest summer.46 days in the 90s including 11 straight (also in 1953 and 1954)The Hot Dry Summer of 198847 days with temperatures in the 90s, 7 days in the 100s. Both records.The Deadly Summer of 1995629 people died in July heat wave. Deadliest weather event in Chicago history.July at O’Hare, 106 at Midway, Heat index 119 at O’Hare, 125 at Midway.2nd hottest summer on record.
15 Chicago Worst Winter Storms JanJanJanJan 31-FebSnowfall (inches)23.020.321.621.2Liquid Equivalent (inches)2.401.361.391.57snow/liquid ratio9.6 to 114.9 to 115.5 to 113.5 to 1duration of accumulating snow (hours)~29~38~54~40peak wind gust (mph)53394361maximum snow depth (inches)232918snow stayed on the ground through(number of days)March 942 daysMarch 651 daysJanuary 2321 daysFebruary 1716 daystemperatures after the stormJan 28-29low 15/high 28low 20/high 30Jan 15-16low -19/high 9low -2/high 22Jan 4-5low -9/high 5low -16/high 18Feb 3-4low -6/high 16low 5/high 25
16 Chicago’s Worst Cold Snaps The Winter ofThe coldest winter on record.January, 1912Second coldest January on record.Record stretch of 10 days in a row with lows below zero.13 days below zero for the month.Bitter Cold Christmas 1983Dec temperature below zero for 100 consecutive hours.Dec 24th low temp of -25, high of -11, coldest day in Chicago.Record Cold January 20, 1985-27F. All time coldest temperature for Chicago.
17 Chicago’s Worst Floods October 9-11, 1954Torrential rain over northern Illinois resulted in record flooding.Chicago rainfall for the 3 day period 6.72 inches.August 14-15, 1987Record Salt Creek flood. 16,000 buildings affected.Record rainfall 9.35 inches fell 9 PM August 13th - 3 PM August 14th.O’Hare completely surrounded by water. Kennedy and Edens Expressways had 300 vehicles stranded in water up to 6 feet deep.
18 Chicago’s Worst Floods JulyRecord rainfall over southwest suburbs.State 24 rainfall record of inches at Aurora.Record flood at 19 river gages - DuPage, Fox, Illinois.September 2008Remnants of tropical storms Gustav and Ike brought torrential rainfallTotal Sep rainfall for Chicago was inches.Flooding caused the Brookfield Zoo to closed for the first time.April 17-18, 20134 to 8 inches of rain on already saturated soilRecord river flooding on Des Plaines River, North Branch of Chicago River, and Illinois RiverIllinois River dam damaged by barges. Marseilles flooded.
19 The Great Chicago Fire October 8-10, 1871 Very dry conditions leading up to the fireCold front with strong dry southwest winds October 8, 1871Almost everything made of wood – buildings, sidewalks, roads, piles of firewood for heating. Flammable shingles and tar roofs.300 killed, 100,000 homeless (1/3 of the population)
20 Several Other Fires Around the Great Lakes Peshtigo, Wisconsin FirePeshtigo Firestorm – wall of flame 1 mile high, 5 miles wide and moving 90 mphkilled (greatest death toll for any US fire)1.2 million acres consumedFire generated a tornado that “threw rail cars and houses into the air”.
21 Web Resources http://weather.gov/chicago From menu on left “top news archives” 8/28/2013 First Lego LeagueOffice tours Mon-Fri 800 AM – 430 PMOpen House Sep AM to 300 PM
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