
A cold front will cross the Great Lakes and Northeast U.S. through Monday with gusty winds and areas of rain showers. A strong atmospheric river is expected to move into the Pacific Northwest by midweek bringing a threat for moderate to heavy rainfall, gusty winds, and mountain snows for parts of Washington, Oregon, northern California, and the Sierra Nevada. Read More >
Norman, OK
Weather Forecast Office
| SPC ID #  | 
			Date | Time (CST)  | 
			Path Length (miles)  | 
			Path Width (yards)  | 
			F-Scale | Killed | Injured | County | Path | 
|---|---|---|---|---|---|---|---|---|---|
| 33-1 | 04/19/1933 | 1900 | 15 | 880 | 2 | 25 | Grady | Agawam - NE of Chickasha | |
| 53-39 | 06/19/1953 | 1730 | 6 | 880 | F1 | 0 | 0 | Grady | 5 SW Chickasha - SW edge of Chickasha | 
| 55-1 | 01/05/1955 | 0500 | n/a | n/a | F0 | 0 | 0 | Grady | Chickasha | 
| 55-37 | 05/26/1955 | 0230 | n/a | n/a | F1 | 0 | 0 | Grady | Near Chickasha | 
| 56-20 | 04/28/1956 | 1420 | 35 | n/a | F1 | 0 | 0 | Grady/ McClain/ Cleveland | 5 S Chickasha - 3 E Norman | 
| 58-6 | 04/21/1958 | 1605 | n/a | n/a | F0 | 0 | 0 | Grady | Just S of Chickasha | 
| 77-33 | 05/20/1977 | 1543 | 3 | 90 | F1 | 0 | 0 | Grady | Chickaska (near Airport) | 
| 81-12 | 04/30/1981 | 2015 | 29 | 5 | F2 | 1 | 4 | Grady | Near Minco - Chickasha - S of Rush Springs (* not continuous track) | 
| 83-44 | 05/13/1983 | 2245 | 0.1 | 50 | F1 | 0 | 0 | Grady | 6 N Chickasha | 
| 05/03/1999 | 1646 | 9 | 880 | F3 | 0 | 4 | Caddo/ Grady | 2 WSW Laverty - 4 S Verden - 2.5 WNW Downtown Chickasha | |
| 05/03/1999 | 1707 | 1 | 75 | F0 | 0 | 0 | Grady | 5 W Downtown Chickasha | |
| 05/03/1999 | 1712 | 4 | 500 | F2 | 0 | 4 | Grady | 2.5 NW Downtown Chichasha - Chickasha Airport (NW edge of Chicakasha) - 4 NNE Downtown Chickasha | |
| 05/04/2001 | 1805 | 0.2 | 25 | F0 | 0 | 0 | Grady | 0.5 E Chickasha | |
| 05/24/2011 | 1606 | 33 | 880 | EF4 | 1 | 48 | Grady/ McClain/ Cleveland | 2 S Chickasha - SW Oklahoma City (near SW 149th and Portland) | 
Records taken from the Storm Prediction Center archive data, "Storm Data", and data from the National Weather Service office in Norman. Data modified as described in NOAA Tech Memo NWS SR-209 (Speheger, D., 2001: "Corrections to the Historic Tornado Database").
Historic data, especially before 1950, are likely incomplete.
                        
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                US Dept of Commerce
                National Oceanic and Atmospheric Administration
                National Weather Service
                Norman, OK
                National Weather Center
                120 David L. Boren Blvd. Suite 2400
                Norman, OK 73072
                
(405) 325-3816
                
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