An upper low was digging into southern California with a surface low located over northwest Chihuahua.  Southeast winds east of the surface low brought low level gulf moisture into the region with southwest winds aloft helping to produce ample shear for severe thunderstorms with hail up to 2 inches in diameter and wind gusts over 60 mph.  Some flash flooding was also reported in El Paso with close to an inch of rain in 15 minutes.

Flash Flood in EL PASO, TEXAS
From 21-MAY-18 17:15:00 to 21-MAY-18 18:45:00 (MST-7)
Location: EL PASO SUNLAND ARPT
Flood cause: Heavy Rain
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Homes flooded in low-lying portion of Buena Vista neighborhood including Courchesne Rd. Drainage may have been compromised by nearby construction.

Flash Flood in EL PASO, TEXAS
From 21-MAY-18 17:45:00 to 21-MAY-18 19:00:00 (MST-7)
Location: EL PASO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Flooding reported off of I-10 on Gateway West and Geronimo in central El Paso.

Flash Flood in EL PASO, TEXAS
From 21-MAY-18 17:15:00 to 21-MAY-18 19:00:00 (MST-7)
Location: WHITE
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Rushing water caused a rock wall to collapse just east of Suncrest Drive, north of Wallenberg Drive. Swift water then rushed down south Mesa Hills Dr nearby.

Hail in EL PASO, TEXAS
From 21-MAY-18 16:53:00 to 21-MAY-18 16:53:00 (MST-7)
Location: MONTOYA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in EL PASO, TEXAS
From 21-MAY-18 17:05:00 to 21-MAY-18 17:05:00 (MST-7)
Location: (ELP)EL PASO INTL AR
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in EL PASO, TEXAS
From 21-MAY-18 17:09:00 to 21-MAY-18 17:09:00 (MST-7)
Location: MONTOYA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in EL PASO, TEXAS
From 21-MAY-18 17:11:00 to 21-MAY-18 17:11:00 (MST-7)
Location: TOBIN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in EL PASO, TEXAS
From 21-MAY-18 17:13:00 to 21-MAY-18 17:15:00 (MST-7)
Location: TOBIN
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in EL PASO, TEXAS
From 21-MAY-18 17:20:00 to 21-MAY-18 17:25:00 (MST-7)
Location: TOBIN
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in EL PASO, TEXAS
From 21-MAY-18 17:29:00 to 21-MAY-18 17:35:00 (MST-7)
Location: TOBIN
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in EL PASO, TEXAS
From 21-MAY-18 17:05:00 to 21-MAY-18 17:10:00 (MST-7)
Location: WHITE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Several trees down near the Sunland Park Mall.

Thunderstorm Wind in EL PASO, TEXAS
From 21-MAY-18 17:03:00 to 21-MAY-18 17:10:00 (MST-7)
Location: EL PASO SUNLAND ARPT
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet site near Bob-O's.

Thunderstorm Wind in EL PASO, TEXAS
From 21-MAY-18 17:13:00 to 21-MAY-18 17:20:00 (MST-7)
Location: TOBIN
Magnitude: 54.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter measured a 62 mph gust in northeast El Paso.

Hail in EL PASO, TEXAS
From 21-MAY-18 17:00:00 to 21-MAY-18 17:20:00 (MST-7)
Location: WHITE
Magnitude: 1.00 
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Public

There were several reports from the public near the Sunland Park Mall of hail up to quarter size that broke skylights and windows. Winds near 60 mph driving the hail intensified the effects.