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Joliet Tornado of April 6, 1972.

COM7311843

Publication Date	1973
Personal Author	Pearl, E. W.
Page Count	19
Abstract	On April 6, 1972 a large tornado cyclone swept through Joliet, Illinois and the surrounding area to the west. The path was 33 miles long and averaged an exceptional 3-1/2 miles wide but within the Joliet damage area there were four smaller, stronger swaths. The meteorological sequence of events leading up to the storm are examined. The analysis includes a series of surface charts, the radar investigation, and a potential temperature cross-section as well as a thorough ground and aerial survey of the damage. A shallow layer of cold polar air existed, creating an inversion over the area where the tornadoes occurred. The rare nature of the storm was such that it was difficult to call it a tornado, several tornadoes, or no tornado at all. (Modified author abstract)
Keywords	Tornadoes Illinois Cyclones Atmospheric temperature Temperature inversions Aerial surveys Meteorological radar Joliet(Illinois)
Source Agency	Invalid Source Agency Code
NTIS Subject Category	55C - Meteorological Data Collection, Analysis, & Weather Forecasting
Corporate Authors	Chicago Univ., Ill. Satellite and Mesometeorology Research Project.
Document Type	Technical Report
Title Note	Research paper.
NTIS Issue Number	197324

Joliet Tornado of April 6, 1972.

Joliet Tornado of April 6, 1972.
COM7311843

Publication Date	1973
Personal Author	Pearl, E. W.
Page Count	19
Abstract	On April 6, 1972 a large tornado cyclone swept through Joliet, Illinois and the surrounding area to the west. The path was 33 miles long and averaged an exceptional 3-1/2 miles wide but within the Joliet damage area there were four smaller, stronger swaths. The meteorological sequence of events leading up to the storm are examined. The analysis includes a series of surface charts, the radar investigation, and a potential temperature cross-section as well as a thorough ground and aerial survey of the damage. A shallow layer of cold polar air existed, creating an inversion over the area where the tornadoes occurred. The rare nature of the storm was such that it was difficult to call it a tornado, several tornadoes, or no tornado at all. (Modified author abstract)
Keywords	Tornadoes Illinois Cyclones Atmospheric temperature Temperature inversions Aerial surveys Meteorological radar Joliet(Illinois)
Source Agency	Invalid Source Agency Code
NTIS Subject Category	55C - Meteorological Data Collection, Analysis, & Weather Forecasting
Corporate Authors	Chicago Univ., Ill. Satellite and Mesometeorology Research Project.
Document Type	Technical Report
Title Note	Research paper.
NTIS Issue Number	197324