Driven southwest by outflow from a complex of thunderstorms in Oklahoma early this morning, a frontal boundary moved into the northeast South Plains and northern Rolling Plains by noon ahead of very moist easterly winds. Although a weak upper ridge was in place over West Texas, a subtropical jet streak flowing over the region assisted in severe thunderstorm development. Strong instability combined with upslope flow and the frontal boundary allowed a supercell storm to erupt early this afternoon in central Floyd County before moving slowly south accompanied by multiple landspout tornadoes, large hail and heavy rain. As this supercell collapsed near Cone, a haboob raced south and west with winds up to 77 mph resulting in minor damage to trees and structures in Crosbyton. Thereafter, a second supercell storm developed to the east in central Dickens County which also proceeded to move south. While east of Spur, this supercell produced an EF-1 tornado over ranch land that damaged some trees. As this storm's mesocyclone continued southward, intense and prolonged rear flank downdraft winds measured as high as 92 mph created scattered structural damage in Girard and Jayton. Torrential rains were measured as high as 4.3 inches by a NWS COOP observer in Jayton; however, flash flooding was not reported. Fortunately, no injuries occurred with any of these storms. Total property losses could exceed $250,000.

Hail in STONEWALL, TEXAS
From 23-MAY-13 16:30:00 to 23-MAY-13 16:33:00 (CST-6)
Location: ASPERMONT ARPT
Magnitude: 3.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

An amateur radio operator measured large hail of golf ball size six miles southwest of Aspermont and tennis ball size 12 miles southwest of Aspermont. A separate report and photo of three-inch diameter hail was also received about 12 miles southwest of Aspermont. No damage was observed.

Heavy Rain in KENT, TEXAS
From 23-MAY-13 15:45:00 to 23-MAY-13 17:30:00 (CST-6)
Location: JAYTON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Torrential rains fell over much of far northeast Kent County from a slow-moving, high precipitation supercell. In Jayton, the NWS COOP observer measured a staggering 4.3 inches of rain; most of which fell in one hour. Elsewhere, a Texas Tech University West Texas mesonet station southeast of Jayton recorded 2.45 inches; however, intense straight-line winds during the heaviest rainfall likely resulted in some undercatch issues. These rains produced minor flooding of roads and ranch land with at least one instance of several inches of water flowing over a road near Girard. Runoff from these rains caused a river gage ten miles south of Aspermont to rise seven feet in four hours early the next morning, but this impressive rise still remained well below the river flood action stage.

Hail in LYNN, TEXAS
From 23-MAY-13 18:03:00 to 23-MAY-13 18:03:00 (CST-6)
Location: ODONNELL
Magnitude: 1.10 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A resident reported hail slightly larger than quarters covering their lawn. No damage was reported.

Hail in FLOYD, TEXAS
From 23-MAY-13 13:23:00 to 23-MAY-13 14:20:00 (CST-6)
Location: FLOYDADA MUNI ARPT
Magnitude: 1.75 
Reported by: Fire Department/Rescue

For nearly an hour, a slow-moving supercell drifted south over rural areas of southeast Floyd County and produced several instances of large hail. These hailstones ranged in size from quarters to golfballs and produced an undetermined amount of damage to crops and some vehicles.

Thunderstorm Wind in FLOYD, TEXAS
From 23-MAY-13 14:20:00 to 23-MAY-13 14:25:00 (CST-6)
Location: LAKEVIEW
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: COOP Observer

A NWS COOP observer reported shingles removed from multiple homes southeast of Floydada. These winds were the result of an intense rear flank downdraft of a supercell that would later proceed southward into Crosby County and produce an extended period of strong and severe winds.

Hail in DICKENS, TEXAS
From 23-MAY-13 14:49:00 to 23-MAY-13 14:49:00 (CST-6)
Location: AFTON
Magnitude: 1.75 
Reported by: Law Enforcement

Law enforcement personnel estimated golf ball size hail in Afton and also five miles north of Dickens. Damage from the hail was not known.

Tornado in FLOYD, TEXAS
From 23-MAY-13 13:30:00 to 23-MAY-13 13:35:00 (CST-6)
Location: DOUGHERTY
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several storm spotters and storm chasers observed a landspout tornado with a visible funnel cloud for about five minutes. This landspout moved slowly southward north of US Highway 62/70 and was visible as far away as the Hale County Airport in Plainview. Fortunately, this landspout caused no damage as it tracked over open land.

Thunderstorm Wind in LYNN, TEXAS
From 23-MAY-13 18:25:00 to 23-MAY-13 18:25:00 (CST-6)
Location: SKEEN
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter measured a wind gust to 61 mph in Tahoka.

Thunderstorm Wind in CROSBY, TEXAS
From 23-MAY-13 14:14:00 to 23-MAY-13 14:59:00 (CST-6)
Location: CONE
Magnitude: 67.00 MG
Property damage: 20.00K
Reported by: Broadcast Media

A swath of destructive winds in the rear flank downdraft of a supercell exited Floyd County and engulfed much of northern Crosby County for at least 45 minutes. The slow movement of the supercell and its eventual collapse near Crosbyton prolonged the duration and intensity of these winds. Wind gusts in Crosbyton were measured as high as 77 mph resulting in scattered minor structural damage. Several tree limbs were broken and a few trees were completely snapped or uprooted. Multiple power outages resulted from snapped power poles throughout portions of northern Crosby County. These fierce winds also created a dangerous haboob that produced near zero visibility in blowing dust for several minutes. An unknown quantity of young grain crops in the area were damaged or destroyed after being sand blasted by wind and dust.

Tornado in FLOYD, TEXAS
From 23-MAY-13 12:53:00 to 23-MAY-13 12:53:00 (CST-6)
Location: MUNCY
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Multiple storm spotters and chasers observed a very brief landspout tornado about seven miles WSW of Cedar Hill.

Thunderstorm Wind in DICKENS, TEXAS
From 23-MAY-13 15:15:00 to 23-MAY-13 15:15:00 (CST-6)
Location: SPUR
Magnitude: 70.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A roof was partially blown off a home about one mile east of Spur. The cause was determined to be an intense downburst wrapping around a mesocyclone passing east of the house. These destructive straight-line winds would continue southeast into northeastern Kent County and cause scattered to widespread wind damage.

Hail in DICKENS, TEXAS
From 23-MAY-13 16:13:00 to 23-MAY-13 16:15:00 (CST-6)
Location: SPUR
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Broadcast media estimated hailstones ranging in size from quarters in Spur to golf ball size one mile east of Spur. No reports of damage were received.

Tornado in FLOYD, TEXAS
From 23-MAY-13 13:22:00 to 23-MAY-13 13:22:00 (CST-6)
Location: SOUTH PLAINS
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Following a brief landspout tornado earlier, Floydada Fire Department personnel observed a second brief landspout tornado about two miles south of Cedar Hill.

Tornado in DICKENS, TEXAS
From 23-MAY-13 15:15:00 to 23-MAY-13 15:25:00 (CST-6)
Location: SPUR
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A NWS aerial storm survey discovered evidence of a tornado debris pattern in open ranch land in far southeast Dickens County. Damage to trees in this area displayed a hallmark convergent pattern and correlated well with a tight gate-to-gate rotation couplet in the area as observed by Doppler radar. The path length and width are crude estimates given generally sparse damage indicators throughout the path of this tornado. Damage to some trees was deemed sufficiently strong to warrant an EF-1 rating.

Thunderstorm Wind in KENT, TEXAS
From 23-MAY-13 15:37:00 to 23-MAY-13 16:20:00 (CST-6)
Location: GIRARD
Magnitude: 80.00 MG
Property damage: 300.00K
Reported by: Mesonet

Similar to an earlier supercell in Floyd and Crosby Counties, intense downburst winds in the rear flank downdraft created prolonged and widespread destructive winds in northeast Kent County. These winds were likely enhanced by a strong mesocyclone that earlier was tornadic in southeast Dickens County. A Texas Tech University West Texas mesonet located one mile SSE of Jayton recorded 20 consecutive minutes of severe wind gusts ranging from 59 mph to 92 mph! In Girard and Jayton, scattered structural damage was commonplace and at least one trailer was completely destroyed. At least one home in Girard lost a portion of its roof, but damage to most homes in Girard and Jayton was less severe and consisted of shingle loss, damage to siding, cracked or shattered windows, and toppled fences. Several trees were damaged; one of which totaled a car in Jayton after landing directly on the vehicle. Damage to area farm and ranch land consisted of toppled center pivots and large storage tanks. Power outages were common as several dozen power poles were snapped. Fortunately, no injuries occurred during this extended bout of destructive winds; however, damage to some homes was compounded by heavy rains entering damaged roofs and cracked windows resulting in water damage to carpets, walls and furniture. A NWS storm survey the following day in Girard and Jayton uncovered classic divergent debris patterns associated with downbursts. Monetary losses are estimated at this time and may rise once insurance figures become available.