The Oklahoma Weather Timeline provides a decade-by-decade listing of interesting or disastrous events that have occurred in Oklahoma's weather history.
Time Line 1990-1999
1990 May 1-4: Major flooding on Red, Canadian, and Arkansas.
1991 March: 17 tornadoes, most March tornadoes, 1950-1999.
1991 April 26: Severe thunderstorm outbreak, the first during which the National Weather Service made operational use of the WSR-88D (Doppler) radar, commonly known as NEXRAD.
1992 September: 16 tornadoes, most September tornadoes, 1950-1999.
1994 March 1: Oklahoma Mesonet commissioned – first statewide network of its kind.
1994 June 27: Tipton Mesonet site records 120 degree temperature, tying the all-time state record.
1994 Aug 17: Severe thunderstorm produces large hail over a north/south path extending from Manchester, near the Kansas border, to Minco in central Oklahoma. Mesonet site at Lahoma recorded a peak wind of 113 miles per hour before anemometer was broken.
1995 June: 28 tornadoes, most June tornadoes, 1950-1999.
1995-1996 August-May: Extreme drought disastrous fire season, very small wheat harvest.
1996: Driest February of century with a statewide-averaged precipitation of 0.20 inches (tied).
1998: Severe summer drought began at the end of a "perfect" wheat growing season.
1998 October 4: 27 tornadoes, national record for tornadoes in any state on a single day in October.
1998 October: 27 tornadoes, national record for tornadoes in any state during October.
1999 May 3: Tornado outbreak in central Oklahoma – 75 tornadoes in 21 hours. F5 damage in Moore, Midwest City, Del City, south Oklahoma City. Toll: 40 dead, over 700 injures, $1B damages.
1999 May: 91 tornadoes, most in one month, 1950-1999.
1999: Warmest November of century with a statewide-averaged temperature of 56.2 degrees.
1999: Most tornadoes in a single year, 137 tornadoes.
1998-1999: Most tornadoes in consecutive years, 220.