(KTEN) – From September 2021 through March 2022, a large portion of Texas and Oklahoma experienced a rainfall deficit. This caused the majority of the I-35 corridor and portions of North Texas to experience severe to extreme drought conditions. Though the rainfall deficit continues, drought conditions have improved significantly. 


By March 2022, Texoma had reached a seven month rainfall deficit. In Sherman, rainfall from September 2021 through March 2022 totaled 9.60 inches–14.7 inches below the normal rainfall for that time period. Severe to extreme drought conditions were in place for the majority of the KTEN viewing area. 


As of June 8, drought has been almost eliminated in Texoma due to how much rain fell in April and May.


April brought 6.84 inches of rain to Sherman, nearly double the normal monthly rainfall. The majority of April’s rain fell in one day.  A new rainfall record was set on April 24 with a total of 4.88 inches falling at the airport. 


In May, Sherman picked up almost 5 inches of rain. May’s average rainfall is 5.54 inches and while Sherman technically finished the month in a 0.5 inch deficit, the rainfall significantly aided drought conditions and helped decrease our 9 month rainfall deficit. 


After April and May rainfall, our rainfall deficit improved from 14.70 inches to 7.72 inches. 


How does this year's rainfall deficit compare to the rainfall deficit in 2011? 

In 2011, portions of the Sooner State and the Lone Star State were in a severe rainfall deficit. From January to September 2011, Sherman only received 17.31 inches of rain which was a 10 month deficit of 15.09 inches. 


This year, Sherman’s seven month rainfall deficit was on track with the 2011 deficit. After seven months, September 2021 through March 2022, Sherman was in a 14.70 inch deficit.



The rainfall deficits in 2011 and 2022 both resulted in flash drought conditions with a number of counties under severe to extreme drought. However, drought conditions quickly improved with a surplus in rainfall for the two months following 2011’s rainfall deficit and 2022’s rainfall deficit.