An upper level low pressure pushed slowly east from southeast Colorado. A cold front/dry line moved southeast behind the low pressure. With the aid of afternoon heating, thunderstorms developed along and ahead of the boundaries. Deep layer shear and instability was more than sufficient for severe thunderstorm development, especially near and north of Interstate 40. By mid afternoon, several thunderstorms had developed and become severe. Large hail was the main threat, although a few locations reported wind damage, and a tornado was reported west of Langston in Logan county. Monetary damages were estimated.

Hail in WOODS, OKLAHOMA
From 18-APR-09 15:13:00 to 18-APR-09 15:13:00 (CST-6)
Location: AVARD
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WOODS, OKLAHOMA
From 18-APR-09 15:53:00 to 18-APR-09 15:54:00 (CST-6)
Location: ALVA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The hail covered the ground.

Hail in OKLAHOMA, OKLAHOMA
From 18-APR-09 19:07:00 to 18-APR-09 19:07:00 (CST-6)
Location: JONES
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

The spotter also estimated 60 mph winds with the hail.

Hail in MCCLAIN, OKLAHOMA
From 18-APR-09 19:14:00 to 18-APR-09 19:14:00 (CST-6)
Location: PURCELL
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in CLEVELAND, OKLAHOMA
From 18-APR-09 19:15:00 to 18-APR-09 19:15:00 (CST-6)
Location: SLAUGHTERVILLE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in CLEVELAND, OKLAHOMA
From 18-APR-09 19:20:00 to 18-APR-09 19:20:00 (CST-6)
Location: LEXINGTON
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in WOODS, OKLAHOMA
From 18-APR-09 16:15:00 to 18-APR-09 16:15:00 (CST-6)
Location: ALVA
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A power pole was blown down on Highway 281, two miles north of Highway 64. Monetary damages were estimated.

Hail in ALFALFA, OKLAHOMA
From 18-APR-09 16:30:00 to 18-APR-09 16:30:00 (CST-6)
Location: BURLINGTON
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

The reported was relayed by KWTV-9.

Hail in MAJOR, OKLAHOMA
From 18-APR-09 16:35:00 to 18-APR-09 16:35:00 (CST-6)
Location: ORIENTA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in OKLAHOMA, OKLAHOMA
From 18-APR-09 18:52:00 to 18-APR-09 18:52:00 (CST-6)
Location: EDMOND
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in MAJOR, OKLAHOMA
From 18-APR-09 17:30:00 to 18-APR-09 17:30:00 (CST-6)
Location: AMES
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Tornado in LOGAN, OKLAHOMA
From 18-APR-09 19:05:00 to 18-APR-09 19:05:00 (CST-6)
Location: LANGSTON
Tornado F-scale: EF1
Crop damage: 0.00K
Reported by: NWS Storm Survey

A brief tornado struck a group of four homes near Langston. All four homes sustained significant damage, including a two story home where the second floor was destroyed. Significant roof damage was noted on the other homes, as well as damage to walls and windows. The tornado caused significant damage to trees and power poles, including several that had been snapped. A few outbuildings and sheds were also heavily damaged at this location. No injuries were reported with the tornado. Damage estimates were not given.

Hail in CLEVELAND, OKLAHOMA
From 18-APR-09 19:42:00 to 18-APR-09 19:42:00 (CST-6)
Location: LAKE THUNDERBIRD DAM
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in MCCLAIN, OKLAHOMA
From 18-APR-09 20:15:00 to 18-APR-09 20:15:00 (CST-6)
Location: PURCELL
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Hail in SEMINOLE, OKLAHOMA
From 18-APR-09 21:30:00 to 18-APR-09 21:30:00 (CST-6)
Location: KONAWA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Hail in MCCLAIN, OKLAHOMA
From 18-APR-09 21:30:00 to 18-APR-09 21:30:00 (CST-6)
Location: BYARS
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in WOODS, OKLAHOMA
From 18-APR-09 14:56:00 to 18-APR-09 14:56:00 (CST-6)
Location: AVARD
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WOODS, OKLAHOMA
From 18-APR-09 15:00:00 to 18-APR-09 15:00:00 (CST-6)
Location: AVARD
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WOODS, OKLAHOMA
From 18-APR-09 15:05:00 to 18-APR-09 15:05:00 (CST-6)
Location: CAMP HOUSTON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in WOODS, OKLAHOMA
From 18-APR-09 15:43:00 to 18-APR-09 15:43:00 (CST-6)
Location: WAYNOKA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The hail was reported at the Waynoka Airport.

Hail in WOODS, OKLAHOMA
From 18-APR-09 14:40:00 to 18-APR-09 14:40:00 (CST-6)
Location: CAMP HOUSTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public