July

Oklahomans enjoyed two stretches of mild weather during July, providing brief respites from the otherwise hot conditions and a tantalizing taste of fall weather to come. Two substantial cold fronts brought cooler temperatures and moisture, keeping high temperatures 10-15 degrees below normal during these periods. Oklahoma City experienced seven consecutive days with highs below 90 degrees from July 17-23, and 10 days overall during the month. Tulsa had 11 days below 90 degrees, including six consecutive days from July 17-22.

The unusually wet and mild weather Oklahoma enjoyed through much of May and June continued into July, providing the state with uncharacteristic summertime drought relief. The Southern Plains heat dome still managed to meander its way over Oklahoma for short periods, however, basting the state in intense heat and stifling humidity. The Oklahoma Mesonet site at Pauls Valley reached a network-record heat index of 126 degrees on July 13, besting the previous record of 125 degrees from Calvin back on Aug. 9, 1999. The Mesonet’s heat index records date back to 1997.

The seemingly impenetrable heat wave and dry spell that had punished Oklahoma since early June continued through nearly all of July, giving Oklahoma the type of scorching hot weather unseen in the state since the brutal summers of 2011 and 2012. A strong cold front snuck through the heat dome’s defenses near the end of the month to bring some relief, but the damage was done. The combination of hot weather, a lack of significant moisture, and relentless sunshine combined to plunge Oklahoma into flash drought that had covered the entire state by the end of July.

Oklahoma’s July was mild for the most part, and a bit wet for much of the state. Extreme temperatures—at least as read on the thermometer—were in short supply, but the pressure cooker heat due to high humidity seemed to be well stocked. Severe weather did strike sporadically through the month, mostly in the form of severe winds as is common to summer months in the Southern Plains. One tornado touched down near Yale in Payne County on July 7, an EF-1 twister that damaged homes and outbuildings.

July brought a near miraculous recovery to much of Oklahoma, which was faced with an intensifying drought headed into summer’s scorching middle stanza. Uncharacteristically wet conditions succeeded in beating the drought back to a more manageable level, however, especially across the hardest hit areas in northern and central Oklahoma. Drought covered as much as 51 percent of the state on July 7 according to the U.S. Drought Monitor. That coverage was reduced nearly in half by the end of July, however, eventually encompassing a little less than 26 percent of the state.

Drought returned to the state for the first time since March 12, a stark reminder that spring deluges can quickly be forgotten during the unforgiving Oklahoma summer. The abrupt end of the moisture actually extended back to mid-June in some areas, but the deficits widened further during July. The lack of rain coincided with intermittent periods of hot, windy weather. Those sporadic bouts of extreme summer conditions helped to accelerate the drought development process, despite the month being cooler than normal overall.