A very potent upper level system produced widespread hazards from heavy snow across the front range/Rockies to severe weather across the Southern High Plains. The vigorous closed upper low was approached the Four Corners region from the west. A warm front lifted north and northwest across all but the Oklahoma Panhandle and the northwest Texas Panhandle while a sharpening dryline was located over eastern New Mexico. The dryline preceded a Pacific cold front which was also located in eastern New Mexico and swept eastward later in the evening. A broken line of thunderstorms developed ahead of the dryline in eastern New Mexico and tracked north and east into the western and southwestern Texas Panhandle before continuing to move east across the remainder of the eastern Panhandles during the evening hours, growing upscale as the Pacific cold front swept eastward and overtook the dryline. Nine confirmed tornadoes occurred early in the event during the afternoon hours and some of these were large, violent and were on the ground for long periods of time. Three separate instances occurred where two tornadoes were in progress from the same parent thunderstorm at the same time. While traveling across mostly rural areas, the tornadoes did impact several farm homes as well as Palo Duro State Park and Greenbelt Lake.

Thunderstorm Wind in HEMPHILL, TEXAS
From 13-MAR-21 20:53:00 to 13-MAR-21 20:55:00 (CST-6)
Location: CANADIAN HEMPHILL AR
Magnitude: 54.00 MG
Reported by: AWOS

Flood in ARMSTRONG, TEXAS
From 13-MAR-21 16:30:00 to 13-MAR-21 18:00:00 (CST-6)
Location: CLAUDE
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Minor street flooding in the city of Claude.  Some accumulating hail being reported as  well. Lasted from about 1630 CST to 1800 CST.

Tornado in RANDALL, TEXAS
From 13-MAR-21 16:06:00 to 13-MAR-21 16:12:00 (CST-6)
Location: PALO DURO CANYON STATE PARK
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The supercell underwent another odd handoff from the Palo Duro Canyon tornado near Highway 1258 which was documented by storm chasers in the area. Again, both the initial and new developing tornado co-existed for a period of time creating a wide damage path Near County Road 1 in Armstrong County. This tornado path remained in very rural country with few damage indicators and was likely stronger than suggested by the very limited rating. Along the path the tornado snapped a few small diameter power poles and destroyed a couple out buildings. It also pushed over a semi before it dissipated just north of Highway 287.

Flood in DONLEY, TEXAS
From 13-MAR-21 17:28:00 to 13-MAR-21 18:28:00 (CST-6)
Location: CLARENDON
Flood cause: Heavy Rain
Property damage: 20.00K
Crop damage: 10.00K
Reported by: Public

Flood in DONLEY, TEXAS
From 13-MAR-21 16:40:00 to 13-MAR-21 17:40:00 (CST-6)
Location: HOWARDWICK
Flood cause: Heavy Rain
Property damage: 1.00K
Crop damage: 1.00K
Reported by: Public

Significant street flooding occurred due to heavy rainfall with severe thunderstorms in the area.

Tornado in ARMSTRONG, TEXAS
From 13-MAR-21 16:12:00 to 13-MAR-21 16:34:00 (CST-6)
Location: WASHBURN
Tornado F-scale: EF0
Property damage: 30.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Continuation from a tornado that started in Randall County. The supercell underwent another odd handoff from the Palo Duro Canyon tornado near Highway 1258 which was documented by storm chasers in the area. Again, both the initial and new developing tornado co-existed for a period of time creating a wide damage path Near County Road 1 in Armstrong County. This tornado path remained in very rural country with few damage indicators and was likely stronger than suggested by the very limited rating. Along the path the tornado snapped a few small diameter power poles and destroyed a couple out buildings. It also pushed over a semi before it dissipated just north of Highway 287.

Flash Flood in HEMPHILL, TEXAS
From 13-MAR-21 20:30:00 to 13-MAR-21 20:53:00 (CST-6)
Location: CANADIAN
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Twitter picture of a car halfway under water.

Hail in MOORE, TEXAS
From 13-MAR-21 15:58:00 to 13-MAR-21 16:01:00 (CST-6)
Location: DUMAS
Magnitude: 1.00 
Reported by: Fire Department/Rescue

Flood in GRAY, TEXAS
From 13-MAR-21 17:47:00 to 13-MAR-21 18:47:00 (CST-6)
Location: ALANREED
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Significant street flooding occurred due to heavy rainfall with severe thunderstorms in the area.

Tornado in RANDALL, TEXAS
From 13-MAR-21 16:08:00 to 13-MAR-21 16:11:00 (CST-6)
Location: PALO DURO CANYON STATE PARK
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado was photographed by storm chasers positioned east of the area as it crossed the Swisher county line into Randall County. No damaged was observed and the tornado lifted relatively quickly.

Hail in ARMSTRONG, TEXAS
From 13-MAR-21 15:59:00 to 13-MAR-21 15:59:00 (CST-6)
Location: WASHBURN
Magnitude: 0.75 
Reported by: Public

Hail in RANDALL, TEXAS
From 13-MAR-21 16:00:00 to 13-MAR-21 16:00:00 (CST-6)
Location: LAKE TANGLEWOOD
Magnitude: 1.50 
Reported by: County Official

Tornado in RANDALL, TEXAS
From 13-MAR-21 15:26:00 to 13-MAR-21 16:00:00 (CST-6)
Location: BUFFALO LAKE
Tornado F-scale: EF2
Property damage: 600.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado was a continuation from Swisher County. The tornado damaged numerous electrical transmission lines with power poles snapped along the path. Several homes sustained significant roof damage. One home lost large sections of roof
decking material and this together with a collapsed cell phone
tower led to an EF2 rating. Otherwise, damage to power poles, out
buildings, trees, and fencing suggested EF0 to EF1 ratings along
the tornado path. This tornado handed off to a new tornado - the
Palo Duro Canyon to Washburn tornado - just east of its path and
both tornadoes occurred simultaneously for several minutes before
the first tornado dissipated.

Tornado in DONLEY, TEXAS
From 13-MAR-21 17:48:00 to 13-MAR-21 18:12:00 (CST-6)
Location: CLARENDON
Tornado F-scale: EF2
Property damage: 250.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado touched down on the southwest side of Clarendon, continuing through Greenbelt Reservoir before dissipating northeast of Howardwick. Minor damage to homes and Clarendon College was observed on the west side of Clarendon. The tornado took on a wider path and strengthened as it progressed toward Greenbelt Reservoir causing considerable damage to mobile homes, recreational vehicles, and boating facilities. In addition, several power poles of varying sizes were downed and many trees were snapped in the area.

Thunderstorm Wind in RANDALL, TEXAS
From 13-MAR-21 16:03:00 to 13-MAR-21 16:05:00 (CST-6)
Location: PALO DURO CANYON STATE PARK
Magnitude: 66.00 MG
Reported by: Mesonet

Mesonet reported 3, one min observations ranging from 68 to 76 mph gusts.

Hail in RANDALL, TEXAS
From 13-MAR-21 16:22:00 to 13-MAR-21 16:23:00 (CST-6)
Location: PALO DURO CANYON STATE PARK
Magnitude: 1.50 
Reported by: Public

Tornado in RANDALL, TEXAS
From 13-MAR-21 15:31:00 to 13-MAR-21 15:36:00 (CST-6)
Location: CANYON
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A brief secondary tornado was documented by storm chasers and
residents in the area with video and photographs. This tornado
was just north of the main tornado and appears to have been quickly
absorbed by the larger circulation. The tornado damaged a barn and
several power lines along its short track.

Hail in ARMSTRONG, TEXAS
From 13-MAR-21 16:32:00 to 13-MAR-21 16:47:00 (CST-6)
Location: CLAUDE
Magnitude: 1.75 
Reported by: Public

A severe thunderstorm dropped large hail from penny size to golf ball size hail across the city of Claude.

Hail in CARSON, TEXAS
From 13-MAR-21 16:50:00 to 13-MAR-21 16:51:00 (CST-6)
Location: PANHANDLE
Magnitude: 2.75 
Reported by: Public

Tornado in RANDALL, TEXAS
From 13-MAR-21 15:37:00 to 13-MAR-21 15:42:00 (CST-6)
Location: CANYON
Tornado F-scale: EF1
Property damage: 30.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This satellite tornado occurred south of the main large tornado that was ongoing at the time. Radar and chaser reports/video suggest it was an anticyclonic tornado that occurred on the southern edge of the storms rear flank downdraft. A brief radar debris signature was noted after the tornado crossed he interstate. The tornado snapped power poles along I-27, south of the main tornado track, but no other notable damage occurred as it remained in open ranch and grassland  country otherwise.

Hail in GRAY, TEXAS
From 13-MAR-21 19:27:00 to 13-MAR-21 19:28:00 (CST-6)
Location: PAMPA
Magnitude: 1.00 
Reported by: Emergency Manager

Hail in GRAY, TEXAS
From 13-MAR-21 19:56:00 to 13-MAR-21 19:57:00 (CST-6)
Location: LAKETON
Magnitude: 1.25 
Reported by: Storm Chaser

Chasers said there was lots of quarter size to half dollar size hail stones. Hail  accumulating on the ground up to 2 inches.  Really strong winds estimating without  descriptors about 70 to 80 mph.

Tornado in DONLEY, TEXAS
From 13-MAR-21 17:51:00 to 13-MAR-21 17:52:00 (CST-6)
Location: CLARENDON
Tornado F-scale: EF0
Property damage: 30.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A brief tornado occurred on the western side of the city of Clarendon. This tornado was rain wrapped, but was observed by several chasers in the area. The tornado produced damage consistent with 80 to 85 mph winds, damaging several homes, trees, and sheds. Approximately 10 homes suffered shingle damage to roofs, while multiple trees were downed. Near the narrow path of this tornado, straight line winds caused damage to a scoreboard at a nearby baseball field.

Tornado in ARMSTRONG, TEXAS
From 13-MAR-21 17:02:00 to 13-MAR-21 17:11:00 (CST-6)
Location: GOODNIGHT
Tornado F-scale: EFU
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The track of this tornado is not accessible by road, but was noted on radar and documented by storm chasers in the area.

Hail in GRAY, TEXAS
From 13-MAR-21 19:56:00 to 13-MAR-21 19:57:00 (CST-6)
Location: LAKETON
Magnitude: 1.25 
Reported by: Storm Chaser

Chasers said there was lots of quarter size to half dollar size hail stones. Hail  accumulating on the ground up to 2 inches.  Really strong winds estimating without  descriptors about 70 to 80 mph.

Hail in ROBERTS, TEXAS
From 13-MAR-21 19:59:00 to 13-MAR-21 20:00:00 (CST-6)
Location: MIAMI
Magnitude: 1.00 
Reported by: Storm Chaser

Tornado in RANDALL, TEXAS
From 13-MAR-21 15:48:00 to 13-MAR-21 16:04:00 (CST-6)
Location: PALO DURO CANYON STATE PARK
Tornado F-scale: EF1
Property damage: 300.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The original tornado - Happy to Palo Duro Canyon - associated with this tornado's parent supercell handed off to this second major tornado. Storm chaser video and damage patterns suggest the tornado was either multi-vortex or that multiple satellites may have occurred. Both the original and newly developing tornadoes were briefly on the ground simultaneously. This tornado was narrow initially and possibly consisted of multiple cones as it damaged camp grounds around the rim of Palo Duro State Park. One cabin sustained EF1 damage as its roof was completely removed. A porch likely caught the wind and aided in the damage of the roof, which is why this tornado was not rated higher. Several travel trailers were flipped and one was destroyed at another campground, but none of these trailers were anchored. Minor damage occurred to weaker structures at the state park entrance and there was notable tree damage as well. The tornado crossed the canyon and grew large on the east side, but remained in very rural country. Another rapid and complicated tornado handoff to the Palo Duro Canyon to Washburn tornado occurred east of the canyon around the Randall/Armstrong County line near the intersection of 1258 and Goathead Road as a new circulation took over.

Thunderstorm Wind in ROBERTS, TEXAS
From 13-MAR-21 19:59:00 to 13-MAR-21 19:59:00 (CST-6)
Location: MIAMI
Magnitude: 70.00 MG
Reported by: Storm Chaser

Measured with weather instrument attached to storm chasers vehicle.

Hail in HEMPHILL, TEXAS
From 13-MAR-21 20:44:00 to 13-MAR-21 20:44:00 (CST-6)
Location: CANADIAN
Magnitude: 1.00 
Reported by: Public

Tornado in ARMSTRONG, TEXAS
From 13-MAR-21 16:04:00 to 13-MAR-21 16:14:00 (CST-6)
Location: WASHBURN
Tornado F-scale: EF1
Property damage: 20.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This is a continuation of a tornado that started in Randall County. After crossing Palo Duro Canyon and the county line, the tornado stayed in open county and did minimal damage. It performed another rapid and complicated tornado handoff to the Palo Duro Canyon to Washburn tornado very close to the county line near the intersection of 1258 and Goathead Road as a new circulation took over.