Storms that formed along an outflow boundary dropped more than 5 inches of rain over Stillwater and between 1 and 4 inches in central Oklahoma.
Severe storms brought heavy rain to northeastern Oklahoma (the Nowata Mesonet site recorded more than 2 inches of rain) and one weak tornado in Wagoner County that did not cause any damage.
Three-inch hail was reported at Stigler during the early morning hours.
A tornado struck near Hulbert (Cherokee), resulting in one death and several injuries. Other tornadoes were reported in Checotah (McIntosh) and near Muskogee (Muskogee) on the same evening.
Scattered heavy downpours caused localized flooding in many south-central Oklahoma towns. Madill recorded 4.10 inches in a 24-hour period.
Temperatures rose to 108ºF at Altus and Beaver. This heat fueled strong thunderstorms over northwestern Oklahoma that dropped hail the size of softballs near Slapout.
South-moving storms produced wind gusts of at least 80 miles per hour in Beggs, Cushing, Glencoe, Tulsa, and Morrison, while hail of at least 2 inches occurred in Garfield, LeFlore, and Texas counties. The wind damage was mainly limited to tree, power line, and roof damage, except in Tulsa, where windows were blown out and in Catoosa, where a metal building was destroyed.
Peak wind reports from stations of the Oklahoma Mesonet included: 87 miles per hour at Slapout and 77 miles per hour at Beaver (both in Beaver County).
Hollis (Harmon) recorded 104-degree daily maximum temperatures on both the 3rd and the 4th.
A wind gust of 64 miles per hour was reported at the Tipton Mesonet station and gusts up to 61 miles per hour were measured at the Altus Mesonet site. These strong winds caused significant damage to two buildings, uprooted several large trees in Altus, and snapped power lines.
Severe thunderstorms produced baseball-sized hail and wind damage across northwest, north central, and northeast Oklahoma. Grant County was especially hard-hit by the hailstorm, as 130,000 acres of wheat were destroyed resulting in nearly $20 million in losses. The storms damaged houses and cars, stripped bark from trees, and flattened crops near Wakita, making many fields look like they had already been harvested.
A heatburst occurred overnight in Beckham, Ellis, and Roger Mills counties, warming temperatures from the 60s to the mid 80s just after midnight.
Several weak tornadoes (F0) touched down in Comanche, Stephens, and Osage counties causing only minor damage. The more dangerous threat this day was the straight-line wind. Winds exceeding 90 miles per hour in Tulsa and 70 miles per hour winds in Osage County destroyed a mobile home, seriously injuring three people inside.
A brief tornado touchdown was reported near Hooker (Texas).
Heavy rains fell over north-central and northeastern Oklahoma, resulting in 1-3 inches over much of the state and between 3 and 6 inches over a significant part of the state. The Lahoma Mesonet site recorded over 9 inches of rain during this period—nearly half of the total fell during a heavy downpour on the 5th. Flooding was reported across northeastern Oklahoma on the 9th.
Two tornadoes touched down near Mountain Park in Kiowa County. One was an F0 (no damage) and the other was an F1, which caused major roof damage to one home and destroyed a barn.
A small tornado was reported near Woodward (Woodward) and hail or wind damage was reported in several northwestern counties. The Mesonet site near Camargo (Dewey) reported a peak wind of 67 miles per hour. Daily precipitation amounts included: the Woodward Mesonet station with 3.77 inches, the Arnett Mesonet station (Ellis) with 2.97 inches, the May ranch Mesonet site (Woods) with 2.89 inches, and the Camargo site with 2.69 inches. Hailstorms, predominantly in the south, accompanied a second infusion of cooler air into the state, ending a warm period that included a reported daily maximum temperature of 108 degrees at Goodwell (Texas).
Thunderstorms developed across western portions of the state in advance of a cold front. Baseball-sized hail was reported in Stephens County and strong winds caused damage across Carter and Grady Counties.
The Goodwell Mesonet site recorded a wind gust of 76 miles per hour. Severe winds associated with the thunderstorms blew over trees, damaged outbuildings and a patrol vehicle when a tree fell on it, and snapped power poles.
Tornadoes were reported in Roger Mills and Beckham counties as a round of thunderstorms struck statewide.
Slow-moving storms dumped 4.17 inches of rain over Pauls Valley, resulting in flash flooding in the area.
A tornado near Newkirk remained on the ground over a 9-mile path.
The 115 degree high temperature recorded at Altus Air Force Base was the highest in the nation for that day.
Local flooding events were commonplace in north-central Oklahoma. Vance Air Force Base (Garfield) reported 5.12 inches of rainfall on the 10th.
Oblong hail that measured 2.5 inches by 3.5 inches fell over Vici and damaged vehicles, windows, and roofs.
An F0 and two F1 tornadoes struck Moore, Chandler, and Agra after a tropical airmass produced storms similar to mini-supercell thunderstorms. Several barns were damaged or destroyed, a mobile home was destroyed, a cow and a horse were killed by debris, and several homes were damaged.
Observers in Healdton reported 80 mile per hour thunderstorm-related winds.
Severe storms in southeast Oklahoma produced winds around 100 mph in McAlester, damaging power lines and roofs. Two weak tornadoes touched down in Haskell county as well.
More than 2 inches of rain fell over the Copan Mesonet site on the evening of the 10th and another 6 inches fell on the morning of the 11th.
Due to several rounds of heavy rain-producing thunderstorms that went through Oklahoma, flash flooding occurred in Woodward, Woods, and Alfalfa counties. The Cimarron River overflowed its banks near Waynoka as water rose 2.9 feet above flood stage on the 11th. From northwestern to central Oklahoma, flooding continued though the 14th, especially in the Cimarron River basin.
Hail stones two-and-three-fourths inches in diameter were reported in Cimarron County.
A large storm complex moved into northern Oklahoma and developed into a bow echo. Baseball size hail and winds of 60 mph battered Stillwater, shattering windows across the town and causing power outages. Those storms continued to march east with winds of up to 85 mph measured by the Oklahoma Mesonet site at Inola.
Storms in the Panhandle generated extremely heavy rainfall to the area and numerous reports of severe weather. Among those reports were a preliminary count of five tornadoes on the 13th – four reports from Beaver County and another from Harper County. Large hail and wind gusts of up to 70 mph were reported on the 12th.
Between 3 and 5 inches of rain fell over central and western Oklahoma.
Soon after a 92 mile per hour gust was measured by the Bessie Mesonet site, 79 mile per hour gusts damaged roofs, blew carports over, and overturned a few semi-trucks near Clinton.
Thunderstorms associated with a frontal passage struck a large portion of the state. Extensive street flooding was reported in Ponca City (Kay), and 1.75 inch hail occurred in Blackwell, Ponca City, north of Camp Houston (Woods), southeast of Ft. Supply, and north of Gage (Ellis). Thirteen Oklahoma Mesonet sites reported wind gusts over 60 mph, and Alva (Woods) had a thunderstorm-associated gust of 73 mph. Wind damage was reported in the northern portions of the state, with the most common occurrence being tree or minor structural damage.
The Mesonet site at Alva (Woods) recorded a peak wind of 63 miles per hour.
In the evening, three weak tornadoes touched down in Major County near Orienta. The Erick Mesonet site reported a wind gust of 77 miles per hour and grapefruit-sized hail (4 inches) was reported near Slapout.
Instruments at the Ponca City airport recorded a wind gust of 80 miles per hour. A series of four tornadoes moved across northern Oklahoma City during the afternoon and evening hours. Two F1 tornadoes, one beginning as a waterspout on Lake Hefner, damaged boats, vehicles and a number of structures. An anti-cyclonic F2 tornado struck west of Nichols Hills, causing considerable damage to a strip mall. The fourth tornado was an F2 storm that followed a 5.5-mile path, threatened a busy amusement park, crossed a busy interstate highway, and damaged several homes east of the highway. A commercial radio station tower, designed to withstand 125 mile per hour winds, was toppled. Related thunderstorm winds measuring as high as 105 miles per hour caused extensive damage.
Storms formed over central Oklahoma and were continually fed very humid air from the south. Flash flooding became widespread as 9-12 inches of rain fell over north Oklahoma City. The Oklahoma City North Mesonet station recorded more than 11 inches of rainfall in less than 24 hours and Will Rogers Airport in southwest Oklahoma City had 7.62 inches. Will Rogers airport set a record for highest one-day total rainfall at that station. The Oklahoma City North rainfall exceeded the 500-year rainfall events for the 6- and 12-hour intervals. Heavy rains in Lawton also produced flash flooding which claimed the life of one motorist who was swept away by floodwaters.
A cold front on the 14th produced severe storms in central Oklahoma. A wet microburst event struck Norman, producing winds estimated at more than 80 mph and hail to the size of baseballs. Significant damage was reported in northern and eastern Norman due to the combination of the two hazards. Norman received over an inch of rain in about 15 minutes with the microburst.
Hail up to 3.25” (teacup-size) fell near Shattuck.
Just after midnight, the Hobart Mesonet site recorded 3.45 inches of rain in just one hour!
Hooker reported a balmy high temperature of 105 degrees.
The Madill (Marshall) station recorded a 63 mile per hour gust. One-and-three-quarter-inch hailstones fell in Jackson, Canadian, and Jefferson counties. Eastern Oklahoma received most of the rain, however, including 3.72 inches at Nowata Mesonet site (Nowata), 3.50 inches at Lenapah (Nowata), and 3.19 inches at the Westville Mesonet site (Sequoyah).
Severe thunderstorms over the Oklahoma Panhandle produced high winds and an F0 tornado that damaged an irrigation pivot.
A squall line caused widespread wind damage across Oklahoma, including rolling a mobile home onto Highway 58 near Ringwood, blowing a gas station awning down onto the gas pumps in Hennessey, downing numerous tree limbs, moving a large water tank 6 blocks in Marshall, and destroying buildings near Chickasha and in Fletcher. The highest wind gust measured along the squall line was 100 miles per hour at the Marshall Mesonet site.
Hail fell from thunderstorms across the northwest. The Cherokee Mesonet site (Alfalfa) recorded a peak wind of 61 miles per hour, but rainfall was less than an inch and a half everywhere.
A slow-moving thunderstorm southwest of Cheyenne dropped 10.65 inches of rain in about six hours. Most of the precipitation (9.43 inches) fell in two hours.
A National Weather Service observer at Hollis reported winds of 121 miles per hour during a thunderstorm.
Two tornadoes were produced in Major and Kingfisher counties by storms that were traveling southeastward. A third tornado was produced near Maramec, but none of the tornadoes produced much damage. Although tornadic activity stopped before the storms arrived in the Oklahoma City Metro Area, large hail and winds gusting over 70 miles per hour produced substantial damage.
Most of northwest, west central, north central, and central Oklahoma received 2 to 3 inches of rain, with a maxima of 6+ inches in Harper, Woods, Woodward, Major, Blaine, Kingfisher, and Logan counties. The heavy rain generated flash flooding and river flooding in northwestern and central parts of the state.
Softball-size hail (4.25 inches) fell near Goltry and a wind gust of 80 miles per hour was reported near Ringwood. Central Oklahoma received an additional 4 to 8 inches of rain, making flooding conditions worse.
Wind gusts of 70-80 miles per hour were reported as the storms swept southwestward across an eleven-county area at speeds of over 50 miles per hour. The most damaging winds hit Tulsa, Creek, and Pawnee counties, where wind speeds as high as 100 mph were reported.
Several Panhandle Mesonet sites reported a 105-degree high temperature.
Beaver County was raked with very strong winds, including a peak gust of 80 miles per hour recorded by the Mesonet station at Slapout. Farther east, Hollow (Craig) recorded 2.76 inches of rain and Mulhall (Logan) reported another 2.65 inches.
A strong front brought heavy rainfall to nearly every part of the state. Norman reported a 24-hour total of 4.24 inches.
Heavy rains produced flash flood conditions in Adair, Cherokee, Delaware, Muskogee, and Sequoyah counties. Adair officials declared a state of emergency on the 21st.
Severe thunderstorms produced a few weak landspout tornadoes in Beaver and Texas counties. One F1 tornado severely damaged a hog barn, damaged roofs, and hit a pickup that had a trailer attached.
A severe thunderstorm produced wind gusts of 80 miles per hour in Mooreland, and a wind gust of 74 miles per hour was measured by the Shawnee Mesonet site.
The Freedom Mesonet site reported over 3 inches of rain on the 22nd, prompting a flood warning on the 23rd for the Cimarron River in Woods County.
More local flooding events occurred in many areas including Delaware, Grant, Comanche, Jackson, Sequoyah, McCurtain, and LeFlore counties. Altus Dam (Kiowa) reported 5.25 inches of rainfall on the 23rd.
Norman reported 6.66 inches of rain as a slow-moving cold front moved across the area, producing heavy rains.
Visibilities were less than a quarter mile in Ada and Durant due to heavy fog.
An unusually strong cold front entered the state early on the 25th, triggering widespread showers and thunderstorms. Winds swung around to the north at 10-20 mph behind the front in the rain-cooled air.
Parts of southern and central Oklahoma received up to 7 inches of rain during this period.
The Walters and Shawnee Mesonet sites reported more than 5 inches of rain on this day alone.
A succession of thunderstorms from the 27th through the morning of the 30th produced locally heavy rain in central and eastern parts of the state. One-and-three-quarter-inch hailstones were recorded in Oklahoma County on the 27th, Tillman County on the 28th, and, in the early morning of the 30th in Lincoln, Payne and Pawnee counties. Flash flooding was reported in Johnston County on the 27th, and at Inola (Rogers) and Coweta (Wagoner) on the 29th. Precipitation reports on the morning of the 28th included 4.00 inches at Caney (Atoka), 3.85 inches at Stella (Cleveland), 3.64 inches at Antlers (Pushmataha), and 3.60 inches at Eufaula (McIntosh). On the 29th, Ashland (Pittsburg) reported 3.69 inches of rain, and Daisy (Atoka) reported 3.42 inches. The Mesonet station near Madill recorded 4.33 inches on the 30th, accompanied by 3.38 inches at Lake Eufaula (McIntosh), and 3.29 inches at the Pauls Valley (Garvin) Mesonet station.
No precipitation was reported in Oklahoma on this day, the first such occurrence since April 5. The dry day ended a streak of 82 consecutive days of reported rainfall in Oklahoma.
Between 2 and 4 inches of rain fell over central and northern Oklahoma during this period.
East central and southeastern Oklahoma experienced localized flooding.
A brief tornado touchdown was reported west of Eva (Texas).
A round of thunderstorms brought some relief from the heat in the west but also brought large hail in many area and gusts in excess of 80 miles per hour in Texas and Comanche counties.
Cherokee and Grandfield recorded a high temperature of 102 degrees.