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Chicago Area Weather Disasters Jim Allsopp, National Weather Service, Chicago/Romeoville First Lego League Kickoff September 8, 2013 Oak Lawn Tornado 1967.

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Presentation on theme: "Chicago Area Weather Disasters Jim Allsopp, National Weather Service, Chicago/Romeoville First Lego League Kickoff September 8, 2013 Oak Lawn Tornado 1967."— Presentation transcript:

1 Chicago Area Weather Disasters Jim Allsopp, National Weather Service, Chicago/Romeoville First Lego League Kickoff September 8, 2013 Oak Lawn Tornado 1967 Chicago Blizzard 2011 Chicago Big Snow 1967 Rockford Flash Flood 2006 Illinois River Flood 2008 Plainfield Tornado 1990

2 Tornadoes Tornadoes River Floods/Flash Floods River Floods/Flash Floods Lightning Lightning Hail Hail Thunderstorm Winds Thunderstorm Winds Winter Storms Winter Storms Extreme Heat Extreme Heat Extreme Cold Extreme Cold Drought Drought Lake Michigan – coastal flood, rip currents, seiche Lake Michigan – coastal flood, rip currents, seiche

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5 Tornadoes occur anywhere in the Chicago metro area Tornadoes occur anywhere in the Chicago metro area Tornadoes can strike large cities – Ft. Worth, Miami, Nashville, Salt Lake City Tornadoes can strike large cities – Ft. Worth, Miami, Nashville, Salt Lake City Tornadoes occur at the lakefront Tornadoes occur at the lakefront

6 Weak Tornado (70-75%) Weak Tornado (70-75%) EF0 – winds 65 to 85 mph EF0 – winds 65 to 85 mph EF1 – winds 86 to 110 mph EF1 – winds 86 to 110 mph Strong Tornado (20-25%) Strong Tornado (20-25%) EF2 – winds 111 to 135 mph EF2 – winds 111 to 135 mph EF3 – winds 136 to 165 mph EF3 – winds 136 to 165 mph Violent Tornado (<2%) Violent Tornado (<2%) EF4 – winds 166 to 200 mph EF4 – winds 166 to 200 mph EF5 – winds over 200 mph EF5 – winds over 200 mph EF4 & EF5 cause 85% of tornado fatalities!

7 10 Violent Tornadoes in 90 Years 10 Violent Tornadoes in 90 Years March 28, 1920 – F4, Melrose Park and Maywood March 28, 1920 – F4, Melrose Park and Maywood April 7, 1948 – F4 Manteno, IL to Hebron, IN April 7, 1948 – F4 Manteno, IL to Hebron, IN April 17, 1963 – F4 Essex & Bourbonnais, IL to Medaryville, IN April 17, 1963 – F4 Essex & Bourbonnais, IL to Medaryville, IN April 11, 1965 (Palm Sunday) – F4 Crystal Lake April 11, 1965 (Palm Sunday) – F4 Crystal Lake April 21, 1967 – 3 F4s Belvidere, Lake Zurich, Oak Lawn April 21, 1967 – 3 F4s Belvidere, Lake Zurich, Oak Lawn March 20, 1976 – F4 Deep River to MI City, IN March 20, 1976 – F4 Deep River to MI City, IN June 13, 1976 – F4 Lemont June 13, 1976 – F4 Lemont August 28, 1990 – F5 Plainfield August 28, 1990 – F5 Plainfield

8 10 tornadoes in the Chicago area 10 tornadoes in the Chicago area 3 F4 Tornadoes, 58 killed, 1000 injured 3 F4 Tornadoes, 58 killed, 1000 injured Part of a large outbreak across the Midwest Part of a large outbreak across the Midwest

9 F4 F4 25 mile path, ½ mile wide. 25 mile path, ½ mile wide. 24 fatalities, 500 injured 24 fatalities, 500 injured 13 fatalities and 300 injuries occurred as a dozen busses were tossed at Belvidere High School at school dismissal. 13 fatalities and 300 injuries occurred as a dozen busses were tossed at Belvidere High School at school dismissal.

10 F4 F4 16 mile path, 200 yards wide. 16 mile path, 200 yards wide. 33 killed, 500 injured 33 killed, 500 injured Struck busy intersection at 500 PM on a Friday afternoon. Struck busy intersection at 500 PM on a Friday afternoon.

11 Lemont – Argonne Lab Lemont – Argonne Lab F4 F4 3.3 mile path, 1 mile wide! 3.3 mile path, 1 mile wide! 2 killed, 23 injured. 2 killed, 23 injured.

12 Oswego – Plainfield – Joliet Oswego – Plainfield – Joliet F5 F5 16 mile path, 1/4 mile wide 16 mile path, 1/4 mile wide 29 killed, 350 injured 29 killed, 350 injured Only F5 ever in Chicago area Only F5 ever in Chicago area Only F5 in U.S. in August Only F5 in U.S. in August Plainfield

13 Late July Heat Wave in 1916 July 26 -July 30 most oppressive period of heat ever in Chicago. Min temp in the 80s for 5 straight nights! 1930s Dust Bowl Summers A 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 Hot Summers of the 1950s 6 of 13 hottest summers July hottest month on record Chicagos all time hottest summer. 46 days in the 90s including 11 straight (also in 1953 and 1954) The Hot Dry Summer of days with temperatures in the 90s, 7 days in the 100s. Both records. The Deadly Summer of people died in July heat wave. Deadliest weather event in Chicago history. July at OHare, 106 at Midway, Heat index 119 at OHare, 125 at Midway. 2 nd hottest summer on record.

15 Jan Jan Jan Jan 31-Feb Snowfall (inches) Liquid Equivalent (inches) snow/liquid ratio9.6 to to to to 1 duration of accumulating snow (hours) ~29~38~54~40 peak wind gust (mph) maximum snow depth (inches) snow stayed on the ground through (number of days) March 9 42 days March 6 51 days January days February days temperatures after the storm Jan low 15/high 28 low 20/high 30 Jan low -19/high 9 low -2/high 22 Jan 4-5 low -9/high 5 low -16/high 18 Feb 3-4 low -6/high 16 low 5/high 25

16 The Winter of The Winter of The coldest winter on record. The coldest winter on record. January, 1912 January, 1912 Second coldest January on record. Second coldest January on record. Record stretch of 10 days in a row with lows below zero. Record stretch of 10 days in a row with lows below zero. 13 days below zero for the month. 13 days below zero for the month. Bitter Cold Christmas 1983 Bitter Cold Christmas 1983 Dec temperature below zero for 100 consecutive hours. Dec temperature below zero for 100 consecutive hours. Dec 24th low temp of -25, high of -11, coldest day in Chicago. Dec 24th low temp of -25, high of -11, coldest day in Chicago. Record Cold January 20, 1985 Record Cold January 20, F. All time coldest temperature for Chicago. -27F. All time coldest temperature for Chicago.

17 October 9-11, 1954 October 9-11, 1954 Torrential rain over northern Illinois resulted in record flooding. Torrential rain over northern Illinois resulted in record flooding. Chicago rainfall for the 3 day period 6.72 inches. Chicago rainfall for the 3 day period 6.72 inches. August 14-15, 1987 August 14-15, 1987 Record Salt Creek flood. 16,000 buildings affected. Record Salt Creek flood. 16,000 buildings affected. Record rainfall 9.35 inches fell 9 PM August 13th - 3 PM August 14th. Record rainfall 9.35 inches fell 9 PM August 13th - 3 PM August 14th. OHare completely surrounded by water. Kennedy and Edens Expressways had 300 vehicles stranded in water up to 6 feet deep. OHare completely surrounded by water. Kennedy and Edens Expressways had 300 vehicles stranded in water up to 6 feet deep.

18 July July Record rainfall over southwest suburbs. Record rainfall over southwest suburbs. State 24 rainfall record of inches at Aurora. State 24 rainfall record of inches at Aurora. Record flood at 19 river gages - DuPage, Fox, Illinois. Record flood at 19 river gages - DuPage, Fox, Illinois. September 2008 September 2008 Remnants of tropical storms Gustav and Ike brought torrential rainfall Remnants of tropical storms Gustav and Ike brought torrential rainfall Total Sep rainfall for Chicago was inches. Total Sep rainfall for Chicago was inches. Flooding caused the Brookfield Zoo to closed for the first time. Flooding caused the Brookfield Zoo to closed for the first time. April 17-18, 2013 April 17-18, to 8 inches of rain on already saturated soil 4 to 8 inches of rain on already saturated soil Record river flooding on Des Plaines River, North Branch of Chicago River, and Illinois River Record river flooding on Des Plaines River, North Branch of Chicago River, and Illinois River Illinois River dam damaged by barges. Marseilles flooded. Illinois River dam damaged by barges. Marseilles flooded.

19 Very dry conditions leading up to the fire Very dry conditions leading up to the fire Cold front with strong dry southwest winds October 8, 1871 Cold front with strong dry southwest winds October 8, 1871 Almost everything made of wood – buildings, sidewalks, roads, piles of firewood for heating. Flammable shingles and tar roofs. Almost 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) 300 killed, 100,000 homeless (1/3 of the population)

20 Peshtigo, Wisconsin Fire Peshtigo, Wisconsin Fire Peshtigo Firestorm – wall of flame 1 mile high, 5 miles wide and moving 90 mph Peshtigo Firestorm – wall of flame 1 mile high, 5 miles wide and moving 90 mph killed (greatest death toll for any US fire) killed (greatest death toll for any US fire) 1.2 million acres consumed 1.2 million acres consumed Fire generated a tornado that threw rail cars and houses into the air. Fire generated a tornado that threw rail cars and houses into the air.

21 From menu on left top news archives 8/28/2013 First Lego League From menu on left top news archives 8/28/2013 First Lego League Office tours Mon-Fri 800 AM – 430 PM Office tours Mon-Fri 800 AM – 430 PM Open House Sep AM to 300 PM Open House Sep AM to 300 PM

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