Early this morning, a series of outflow boundaries moved south across the southern Texas Panhandle and much of the Rolling Plains. The most organized of these boundaries would eventually retreat north before stalling from near Hereford (Deaf Smith County, WFO AMA) southeast to Paducah (Cottle County). This boundary provided the focus for an intense and long-lived supercell that developed west of Hereford by mid-afternoon. This supercell proceeded to move southeast and impact areas from Happy and Tulia (Swisher County) southeast to Silverton (Briscoe County), Matador (Motley County) and Grow (King County) with destructive hail, downburst winds and torrential rainfall rates of one half inch in five minutes. By early evening, a second supercell developed west of Plainview (Hale County) and crawled eastward accompanied by hail up to golf ball size and a brief tornado over open land near Lockney (Floyd County).

Thunderstorm Wind in MOTLEY, TEXAS
From 22-APR-15 19:15:00 to 22-APR-15 19:30:00 (CST-6)
Location: MATADOR
Magnitude: 61.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Downburst winds in the rear flank downdraft of a supercell caused scattered wind damage in Matador and also overturned a semi-truck on US Highway 62 east of Matador. The driver was not injured.  Wind damage in and around Matador consisted of a portion of a roof removed from a house, several large trees downed and some fallen power lines.

Hail in SWISHER, TEXAS
From 22-APR-15 17:19:00 to 22-APR-15 18:07:00 (CST-6)
Location: HAPPY
Magnitude: 2.75 
Property damage: 1.50M
Crop damage: 2.50M
Reported by: Amateur Radio

A slow-moving high precipitation supercell produced copious amounts of damaging hail across northern Swisher County with some hailstones as large as baseball size in Happy.  A 12-mile stretch of Interstate 27 from Happy to north of Tulia was covered in hail up to six inches deep.  In addition to damaging roofs of homes and businesses, intense straight line winds in the rear flank downdraft of the supercell carried hail sideways which shattered many north and west facing windows.  Countless vehicles along Interstate 27 suffered broken windows and significant hail dents.  It is estimated that 500 acres of winter wheat were flattened by this barrage of hail, wind and torrential rains with 40 percent of the winter wheat crop suffering lesser degrees of damage.  Preliminary combined monetary losses are estimated at $4M.

Hail in FLOYD, TEXAS
From 22-APR-15 18:52:00 to 22-APR-15 19:02:00 (CST-6)
Location: SOUTH PLAINS
Magnitude: 2.00 
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Fire department officials and storm spotters estimated hail to hen egg size.  Damage was reported to storm spotter vehicles, some of which lost windshields.

Tornado in FLOYD, TEXAS
From 22-APR-15 18:53:00 to 22-APR-15 18:54:00 (CST-6)
Location: AIKEN
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Several storm spotters observed a brief tornado over open land about two miles west of Lockney.  Detailed video from a storm chaser indicated this tornado was preceded by a well-defined rotating wall cloud.  No damage survey was conducted as this tornado remained over open land.

Hail in KING, TEXAS
From 22-APR-15 20:10:00 to 22-APR-15 20:10:00 (CST-6)
Location: FINNEY
Magnitude: 2.75 
Property damage: 30.00K
Reported by: COOP Observer

A COOP observer reported golf ball to baseball size hail covering the ground.  Several vehicles were damaged and lost windows or windshields.

Hail in MOTLEY, TEXAS
From 22-APR-15 19:15:00 to 22-APR-15 19:30:00 (CST-6)
Location: FLOMOT
Magnitude: 1.75 
Property damage: 150.00K
Reported by: Fire Department/Rescue

Storm spotters and fire department officials from Matador reported a swath of large hail up to golf ball size accompanied by destructive downburst winds.  The wind-driven hail damaged dozens of vehicles, broke some north-facing windows to homes and businesses in and near Matador, and caused varying degrees of damage to rooftops.

Flood in MOTLEY, TEXAS
From 22-APR-15 19:15:00 to 22-APR-15 23:00:00 (CST-6)
Location: WHITEFLAT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The Motley County emergency manager reported water over State Highway 70 north of Matador with several secondary roads impassable from high water.

Thunderstorm Wind in KING, TEXAS
From 22-APR-15 21:20:00 to 22-APR-15 21:20:00 (CST-6)
Location: GUTHRIE 6666 ARPT
Magnitude: 65.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Public

A roof was blown off a well-constructed barn at the Four Sixes Ranch.

Thunderstorm Wind in SWISHER, TEXAS
From 22-APR-15 17:25:00 to 22-APR-15 17:55:00 (CST-6)
Location: HAPPY
Magnitude: 58.00 MG
Property damage: 10.00K
Reported by: Fire Department/Rescue

Along with very large hail, damaging rear flank downdraft winds from a high precipitation supercell struck many areas in northern Swisher County. A Texas Tech University West Texas mesonet northeast of Tulia measured a wind gust to 67 mph at 1755 CST. Much of the monetary damage to buildings, vehicles and winter wheat was from the combination of wind and very large hail, although some power lines were downed in the town of Happy as reported by Fire Department officials. The majority of property losses are included in the hail event entry for Swisher County.

Flood in BRISCOE, TEXAS
From 22-APR-15 18:30:00 to 22-APR-15 21:30:00 (CST-6)
Location: SILVERTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The NWS Lubbock regional hydrologist conducted a flood survey from torrential rains that fell across Briscoe, Floyd and Motley Counties.  Rainfall rates from a high precipitation supercell were measured just above one half inch in five minutes with many locations receiving two to three inches of rain in 30 minutes or less.  Despite many roads being temporarily impassable from a few feet of water, damage was not observed.

Flood in FLOYD, TEXAS
From 22-APR-15 19:00:00 to 22-APR-15 22:00:00 (CST-6)
Location: EDGIN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The NWS Lubbock regional hydrologist conducted a flood survey from torrential rains that fell across Briscoe, Floyd and Motley Counties.  Rainfall rates from a high precipitation supercell were measured just above one half inch in five minutes with many locations receiving two to three inches of rain in 30 minutes or less.  Despite many roads being temporarily impassable from a few feet of water, damage was not observed.

Hail in HALE, TEXAS
From 22-APR-15 18:01:00 to 22-APR-15 18:32:00 (CST-6)
Location: HALFWAY
Magnitude: 1.75 
Property damage: 250.00K
Crop damage: 0.00K
Reported by: Public

A swath of hail ranging in size from nickel to golf ball size fell from west of Plainview east across the city.  Damage was generally minor and consisted mostly of vehicle dents, though some homes and businesses suffered damage to roof shingles.  Very little wind accompanied the hail.

Hail in COTTLE, TEXAS
From 22-APR-15 20:06:00 to 22-APR-15 20:33:00 (CST-6)
Location: NARCISSO
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A swath of hail as large as golf ball size fell west to south of Paducah and covered the ground completely.  Damage, if any, was not known.