A sharp dry line moved west out of west Texas and became stationary over the far eastern plains on Sunday, May 23, 2010.  Meanwhile, an unseasonably deep upper level low pressure system over the Great Basin was moving slowly east toward New Mexico.  The combination of the upper level disturbance approaching New Mexico and extreme instability along the dry line set the stage for widespread severe weather from Quay County northeast into Union County.

Hail in UNION, NEW MEXICO
From 23-MAY-10 17:28:00 to 23-MAY-10 17:31:00 (MST-7)
Location: SEDAN
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in QUAY, NEW MEXICO
From 23-MAY-10 18:16:00 to 23-MAY-10 18:19:00 (MST-7)
Location: NARA VISA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in QUAY, NEW MEXICO
From 23-MAY-10 18:16:00 to 23-MAY-10 18:20:00 (MST-7)
Location: NARA VISA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in UNION, NEW MEXICO
From 23-MAY-10 19:32:00 to 23-MAY-10 19:35:00 (MST-7)
Location: AMISTAD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in COLFAX, NEW MEXICO
From 24-MAY-10 02:35:00 to 24-MAY-10 02:42:00 (MST-7)
Location: FARLEY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in UNION, NEW MEXICO
From 23-MAY-10 17:40:00 to 23-MAY-10 17:44:00 (MST-7)
Location: AMISTAD
Magnitude: 2.50 
Property damage: 1.00K
Crop damage: 0.00K
Reported by: COOP Observer

Minor roof damage was reported.

Hail in QUAY, NEW MEXICO
From 23-MAY-10 18:20:00 to 23-MAY-10 18:25:00 (MST-7)
Location: LOGAN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Hail in UNION, NEW MEXICO
From 23-MAY-10 18:45:00 to 23-MAY-10 18:50:00 (MST-7)
Location: SEDAN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in UNION, NEW MEXICO
From 23-MAY-10 19:05:00 to 23-MAY-10 19:15:00 (MST-7)
Location: CLAYTON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in QUAY, NEW MEXICO
From 23-MAY-10 17:00:00 to 23-MAY-10 17:02:00 (MST-7)
Location: SAN JON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in UNION, NEW MEXICO
From 23-MAY-10 17:23:00 to 23-MAY-10 17:26:00 (MST-7)
Location: CLAYTON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in UNION, NEW MEXICO
From 23-MAY-10 17:25:00 to 23-MAY-10 17:28:00 (MST-7)
Location: CLAYTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in UNION, NEW MEXICO
From 23-MAY-10 17:26:00 to 23-MAY-10 17:28:00 (MST-7)
Location: CLAYTON
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in UNION, NEW MEXICO
From 23-MAY-10 17:41:00 to 23-MAY-10 17:43:00 (MST-7)
Location: CLAYTON
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in UNION, NEW MEXICO
From 23-MAY-10 17:43:00 to 23-MAY-10 17:44:00 (MST-7)
Location: CLAYTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in UNION, NEW MEXICO
From 23-MAY-10 16:45:00 to 23-MAY-10 16:50:00 (MST-7)
Location: SEDAN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in UNION, NEW MEXICO
From 23-MAY-10 16:52:00 to 23-MAY-10 16:57:00 (MST-7)
Location: SEDAN
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in UNION, NEW MEXICO
From 23-MAY-10 16:55:00 to 23-MAY-10 16:57:00 (MST-7)
Location: SEDAN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in UNION, NEW MEXICO
From 23-MAY-10 16:58:00 to 23-MAY-10 16:59:00 (MST-7)
Location: SEDAN
Magnitude: 2.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in UNION, NEW MEXICO
From 23-MAY-10 17:00:00 to 23-MAY-10 17:04:00 (MST-7)
Location: HAYDEN
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tornado in UNION, NEW MEXICO
From 23-MAY-10 19:12:00 to 23-MAY-10 19:36:00 (MST-7)
Location: SEDAN
Tornado F-scale: EF2
Property damage: 325.00K
Crop damage: 0.00K
Reported by: Trained Spotter

There was damage to agricultural equipment. A single wide mobile home that had tie down straps was completely destroyed and the undercarriage was carried approximately 40 yards. No injuries reported.

Tornado in UNION, NEW MEXICO
From 23-MAY-10 18:55:00 to 23-MAY-10 19:03:00 (MST-7)
Location: (CAO)CLAYTON ARPT
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Weak satellite tornado captured on video that lasted for approximately 8 minutes. No injuries or significant damage reported.

Tornado in UNION, NEW MEXICO
From 23-MAY-10 19:36:00 to 23-MAY-10 19:48:00 (MST-7)
Location: SEDAN
Tornado F-scale: EF1
Property damage: 125.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Two tornadoes were reported from the same parent supercell thunderstorm.  This is the second tornado with shorter track farther north.

Tornado in UNION, NEW MEXICO
From 23-MAY-10 19:10:00 to 23-MAY-10 19:27:00 (MST-7)
Location: AMISTAD
Tornado F-scale: EF1
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Damage to residence located just northwest of Amistad.

Tornado in UNION, NEW MEXICO
From 23-MAY-10 19:59:00 to 23-MAY-10 20:25:00 (MST-7)
Location: SEDAN
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

No reports of significant damage and no injuries.

Tornado in UNION, NEW MEXICO
From 23-MAY-10 18:52:00 to 23-MAY-10 19:35:00 (MST-7)
Location: (CAO)CLAYTON ARPT
Tornado F-scale: EF2
Property damage: 250.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Debris on Highway 56 was seen at mile post 93. Power lines were down, barbed wire fences and hay bales were all over.  In addition, a steel building from a feed lot was destroyed, a cow with a broken leg was observed on the road, and a semi truck was turned over on private property. The tornado crossed the New Mexico-Oklahoma state line approximately 8.7 miles southeast of Seneca and continued into neighboring Cimarron County, Oklahoma.