Severe thunderstorms developed during the evening of the 2nd near a stationary frontal boundary that extended across northeastern Oklahoma and southeastern Kansas. A very unstable air mass over the region coupled with strong vertical wind shear resulted in some supercell thunderstorm structures. The storms produced hail up to golfball size, wind gusts of up to 80 mph, and a damaging tornado.
A complex of storms that formed in eastern Colorado and western Kansas translated southeastward during the evening and across portions of far northeastern Oklahoma during the early morning hours of the 3rd. Damaging wind occurred in northern Craig County, from the southernmost storm in that complex.

Hail in CRAIG, OKLAHOMA
From 02-APR-15 20:48:00 to 02-APR-15 20:48:00 (CST-6)
Location: PYRAMID CORNERS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in NOWATA, OKLAHOMA
From 02-APR-15 21:10:00 to 02-APR-15 21:10:00 (CST-6)
Location: NOWATA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in OTTAWA, OKLAHOMA
From 02-APR-15 21:38:00 to 02-APR-15 21:38:00 (CST-6)
Location: AFTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in OTTAWA, OKLAHOMA
From 02-APR-15 22:15:00 to 02-APR-15 22:15:00 (CST-6)
Location: OGEECHEE
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Hail in WASHINGTON, OKLAHOMA
From 02-APR-15 19:24:00 to 02-APR-15 19:24:00 (CST-6)
Location: COPAN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in ROGERS, OKLAHOMA
From 02-APR-15 19:40:00 to 02-APR-15 19:40:00 (CST-6)
Location: FOYIL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in OTTAWA, OKLAHOMA
From 02-APR-15 20:29:00 to 02-APR-15 20:29:00 (CST-6)
Location: MIAMI
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in OTTAWA, OKLAHOMA
From 02-APR-15 20:30:00 to 02-APR-15 20:30:00 (CST-6)
Location: COMMERCE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tornado in CRAIG, OKLAHOMA
From 02-APR-15 20:59:00 to 02-APR-15 21:08:00 (CST-6)
Location: KELSO
Tornado F-scale: EF1
Property damage: 50.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This is the first segment of a three segment tornado. In Craig County, the tornado first damaged barns and trees at the S 440 Road. It moved east-southeast snapping or uprooting trees and damaging barns and outbuildings along the E 200 Road, the S 440 Road, and the E 230 Road before crossing I-44, where it blew over two tractor trailers, injuring the driver of one of them. Based on this damage, maximum estimated wind in this segment of the tornado was 95 to 105 mph. The tornado continued into Ottawa County, Oklahoma.

Tornado in OTTAWA, OKLAHOMA
From 02-APR-15 21:08:00 to 02-APR-15 21:14:00 (CST-6)
Location: AFTON
Tornado F-scale: EF1
Property damage: 150.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This is the second segment of a three segment tornado. In Ottawa County, the tornado moved through open country and then crossed Highway 60 where it threw several round hay bales. It destroyed barns and outbuildings, damaged several homes, and snapped or uprooted numerous trees as it crossed the S 510 Road and S 520 Road. Based on this damage, maximum estimated wind in this segment of the tornado was 95 to 105 mph. The tornado continued into Delaware County, Oklahoma.

Tornado in DELAWARE, OKLAHOMA
From 02-APR-15 21:14:00 to 02-APR-15 21:19:00 (CST-6)
Location: BERNICE
Tornado F-scale: EF1
Property damage: 75.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This is the third of three segments of this tornado. The tornado crossed into Delaware County near the S 520 Road. Trees were snapped or uprooted, barns and outbuildings were damaged, and homes were damaged as it approached the north end of Grand Lake from the west-northwest. It destroyed a private boat dock on the lake then moved through a community of houses to the east of the lake, resulting in damage to the roofs of homes as well as tree damage. The tornado dissipated to the east of this community in open country. Based on this damage, estimated maximum wind in this segment of the tornado was 95 to 105 mph.

Thunderstorm Wind in CRAIG, OKLAHOMA
From 02-APR-15 21:20:00 to 02-APR-15 21:20:00 (CST-6)
Location: WHITE OAK
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Strong thunderstorm wind blew down trees northwest of White Oak on Highway 60.

Thunderstorm Wind in CRAIG, OKLAHOMA
From 03-APR-15 01:42:00 to 03-APR-15 01:42:00 (CST-6)
Location: WELCH
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained storm spotter measured thunderstorm wind gusts of 72 mph on Highway 59, south of Kansas/Oklahoma state line.

Hail in MAYES, OKLAHOMA
From 02-APR-15 19:52:00 to 02-APR-15 19:52:00 (CST-6)
Location: ADAIR
Magnitude: 1.50 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MAYES, OKLAHOMA
From 02-APR-15 19:58:00 to 02-APR-15 19:58:00 (CST-6)
Location: ADAIR
Magnitude: 1.75 
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm Wind in NOWATA, OKLAHOMA
From 02-APR-15 20:07:00 to 02-APR-15 20:07:00 (CST-6)
Location: LENAPAH
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Post Office

Strong thunderstorm wind blew down large tree limbs.

Hail in CRAIG, OKLAHOMA
From 02-APR-15 20:50:00 to 02-APR-15 20:50:00 (CST-6)
Location: VINITA
Magnitude: 1.75 
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager