A warm and seasonably moist airmass was in place ahead of a weak cold front stretching from western to northern Oklahoma during the afternoon. During the late afternoon, several supercells developed and moved east-southeast from near Lawton to east of Oklahoma City. These storms dissipated by late evening following the loss of daytime heating.
A second round of thunderstorms rapidly developed during the early morning hours of the 31st along the cold front as it moved into central Oklahoma. Numerous hail and wind reports were received from the Oklahoma City area south and east toward Ardmore and Ada. Extensive hail damage occurred in central Oklahoma, with estimated damages totaling $2 million around the Norman, OK area.

Hail in JOHNSTON, OKLAHOMA
From 31-MAR-13 05:12:00 to 31-MAR-13 05:12:00 (CST-6)
Location: FILLMORE
Magnitude: 1.00 
Reported by: COOP Observer

Thunderstorm Wind in CARTER, OKLAHOMA
From 31-MAR-13 04:10:00 to 31-MAR-13 04:10:00 (CST-6)
Location: DICKSON
Magnitude: 56.00 EG
Property damage: 0.50K
Reported by: Public

Tree limbs up to 4 in diameter snapped off.

Thunderstorm Wind in MURRAY, OKLAHOMA
From 31-MAR-13 04:30:00 to 31-MAR-13 04:30:00 (CST-6)
Location: SULPHUR
Magnitude: 56.00 EG
Property damage: 10.00K
Reported by: Law Enforcement

Windows blown out and power lines down.

Thunderstorm Wind in CADDO, OKLAHOMA
From 31-MAR-13 02:20:00 to 31-MAR-13 02:20:00 (CST-6)
Location: BINGER
Magnitude: 52.00 EG
Property damage: 1.00K
Reported by: Fire Department/Rescue

Branches were downed by the wind, with nickel size hail also reported.

Thunderstorm Wind in CLEVELAND, OKLAHOMA
From 31-MAR-13 02:55:00 to 31-MAR-13 02:55:00 (CST-6)
Location: (OUN)NORMAN WESTHEIMER ARPT
Magnitude: 51.00 MG
Reported by: AWOS

The ASOS at Max Westheimer Airport in Norman measured a 59 mph wind gust.

Thunderstorm Wind in CLEVELAND, OKLAHOMA
From 31-MAR-13 03:00:00 to 31-MAR-13 03:00:00 (CST-6)
Location: NORMAN
Magnitude: 52.00 EG
Reported by: Public

Public reported a gust to 60 mph.

Hail in COMANCHE, OKLAHOMA
From 30-MAR-13 17:20:00 to 30-MAR-13 17:20:00 (CST-6)
Location: CACHE
Magnitude: 1.50 
Reported by: Trained Spotter

Hail in COMANCHE, OKLAHOMA
From 30-MAR-13 17:25:00 to 30-MAR-13 17:25:00 (CST-6)
Location: MT SCOTT
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in COMANCHE, OKLAHOMA
From 30-MAR-13 17:30:00 to 30-MAR-13 17:30:00 (CST-6)
Location: CACHE
Magnitude: 1.25 
Reported by: Public

Hail fell near the intersection of Deyo Mission Rd. and SW Woodlawn Dr.

Hail in COMANCHE, OKLAHOMA
From 30-MAR-13 17:42:00 to 30-MAR-13 17:42:00 (CST-6)
Location: CACHE
Magnitude: 2.30 
Reported by: Trained Spotter

Hail in COMANCHE, OKLAHOMA
From 30-MAR-13 18:27:00 to 30-MAR-13 18:27:00 (CST-6)
Location: LAKE ELLSWORTH DAM
Magnitude: 1.75 
Reported by: Trained Spotter

Thunderstorm Wind in ATOKA, OKLAHOMA
From 31-MAR-13 04:10:00 to 31-MAR-13 04:10:00 (CST-6)
Location: STRINGTOWN
Magnitude: 52.00 EG
Reported by: Public

The public reported gusts to 60 mph.

Hail in COMANCHE, OKLAHOMA
From 30-MAR-13 17:15:00 to 30-MAR-13 17:15:00 (CST-6)
Location: WICHITA MTNS NWR HQ
Magnitude: 1.00 
Reported by: Park/Forest Service

The hail was reported at Camp Doris in the Wichita Mountains Wildlife Refuge.

Hail in COMANCHE, OKLAHOMA
From 30-MAR-13 17:33:00 to 30-MAR-13 17:33:00 (CST-6)
Location: CACHE
Magnitude: 1.75 
Reported by: Trained Spotter

Hail in COMANCHE, OKLAHOMA
From 30-MAR-13 18:01:00 to 30-MAR-13 18:01:00 (CST-6)
Location: CACHE
Magnitude: 1.25 
Reported by: Trained Spotter

Hail in COMANCHE, OKLAHOMA
From 30-MAR-13 18:04:00 to 30-MAR-13 18:04:00 (CST-6)
Location: CACHE
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in SEMINOLE, OKLAHOMA
From 30-MAR-13 18:12:00 to 30-MAR-13 18:12:00 (CST-6)
Location: SCHOOLTON
Magnitude: 1.25 
Reported by: Trained Spotter

Hail in SEMINOLE, OKLAHOMA
From 30-MAR-13 18:30:00 to 30-MAR-13 18:30:00 (CST-6)
Location: SEMINOLE
Magnitude: 1.75 
Reported by: Trained Spotter

The hail was measured at a private residence on Brandon Dr.

Hail in COTTON, OKLAHOMA
From 30-MAR-13 19:02:00 to 30-MAR-13 19:02:00 (CST-6)
Location: WALTERS ARPT
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in SEMINOLE, OKLAHOMA
From 30-MAR-13 19:25:00 to 30-MAR-13 19:25:00 (CST-6)
Location: WEWOKA
Magnitude: 1.00 
Reported by: Fire Department/Rescue

Hail in GRADY, OKLAHOMA
From 30-MAR-13 19:33:00 to 30-MAR-13 19:33:00 (CST-6)
Location: CHICKASHA ARPT
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in HUGHES, OKLAHOMA
From 30-MAR-13 19:54:00 to 30-MAR-13 19:54:00 (CST-6)
Location: HOLDENVILLE
Magnitude: 1.00 
Reported by: Emergency Manager

Hail in GRADY, OKLAHOMA
From 30-MAR-13 20:00:00 to 30-MAR-13 20:00:00 (CST-6)
Location: TABLER
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in ATOKA, OKLAHOMA
From 30-MAR-13 22:30:00 to 30-MAR-13 22:30:00 (CST-6)
Location: CHOCKIE
Magnitude: 2.50 
Property damage: 200.00K
Reported by: Trained Spotter

The hail damaged cars, and covered the ground for hours. Damages estimated.

Hail in HUGHES, OKLAHOMA
From 30-MAR-13 20:43:00 to 30-MAR-13 20:43:00 (CST-6)
Location: GERTY
Magnitude: 1.25 
Reported by: Trained Spotter

The hail lasted for about 10 minutes.

Hail in WASHITA, OKLAHOMA
From 31-MAR-13 01:46:00 to 31-MAR-13 01:46:00 (CST-6)
Location: CANUTE
Magnitude: 1.00 
Reported by: Trained Spotter

Hail accumulated and drifted.

Hail in WASHITA, OKLAHOMA
From 31-MAR-13 02:30:00 to 31-MAR-13 02:30:00 (CST-6)
Location: CORDELL
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in OKLAHOMA, OKLAHOMA
From 31-MAR-13 02:32:00 to 31-MAR-13 02:32:00 (CST-6)
Location: WHEATLAND
Magnitude: 1.50 
Reported by: Public

Hail in CLEVELAND, OKLAHOMA
From 31-MAR-13 02:52:00 to 31-MAR-13 02:52:00 (CST-6)
Location: (OUN)NORMAN WESTHEIMER ARPT
Magnitude: 1.25 
Reported by: Public

Hail in CLEVELAND, OKLAHOMA
From 31-MAR-13 02:54:00 to 31-MAR-13 02:54:00 (CST-6)
Location: NORMAN
Magnitude: 1.25 
Reported by: Trained Spotter

Hail in CLEVELAND, OKLAHOMA
From 31-MAR-13 02:55:00 to 31-MAR-13 02:55:00 (CST-6)
Location: NORMAN
Magnitude: 1.00 
Reported by: Public

The hail was reported at Northwest 36th and Main St.

Hail in CLEVELAND, OKLAHOMA
From 31-MAR-13 03:00:00 to 31-MAR-13 03:00:00 (CST-6)
Location: NOBLE
Magnitude: 1.75 
Reported by: Trained Spotter

Hail in CLEVELAND, OKLAHOMA
From 31-MAR-13 03:00:00 to 31-MAR-13 03:00:00 (CST-6)
Location: NORMAN
Magnitude: 1.00 
Reported by: NWS Employee

The hail was measured at the NWS Forecast Office.

Hail in CLEVELAND, OKLAHOMA
From 31-MAR-13 03:00:00 to 31-MAR-13 03:00:00 (CST-6)
Location: NORMAN
Magnitude: 1.75 
Reported by: Public

Hail in CLEVELAND, OKLAHOMA
From 31-MAR-13 03:00:00 to 31-MAR-13 03:00:00 (CST-6)
Location: NORMAN
Magnitude: 2.00 
Property damage: 2.00M
Reported by: Public

The hail was reported at Southwest 24th St. and Brooks St. Hail of this size was reported at several locations across southwest Norman, and resulted in extensive damage. Numerous vehicles were damaged and some 85 homes lost windows from blowing hail. Damages estimated based on media reports and number and type of damaged structures.

Hail in CLEVELAND, OKLAHOMA
From 31-MAR-13 03:00:00 to 31-MAR-13 03:00:00 (CST-6)
Location: NORMAN
Magnitude: 1.25 
Reported by: Trained Spotter

The hail was reported at the intersection of Flood and Cruce St.

Hail in CLEVELAND, OKLAHOMA
From 31-MAR-13 03:05:00 to 31-MAR-13 03:05:00 (CST-6)
Location: NORMAN
Magnitude: 1.25 
Reported by: Trained Spotter

Hail in CLEVELAND, OKLAHOMA
From 31-MAR-13 03:24:00 to 31-MAR-13 03:24:00 (CST-6)
Location: NOBLE
Magnitude: 1.50 
Reported by: Trained Spotter

Hail in MCCLAIN, OKLAHOMA
From 31-MAR-13 03:45:00 to 31-MAR-13 03:45:00 (CST-6)
Location: WAYNE
Magnitude: 1.00 
Reported by: Broadcast Media

Hail in PONTOTOC, OKLAHOMA
From 31-MAR-13 04:10:00 to 31-MAR-13 04:10:00 (CST-6)
Location: VANOSS
Magnitude: 1.75 
Reported by: Emergency Manager

Hail in PONTOTOC, OKLAHOMA
From 31-MAR-13 04:30:00 to 31-MAR-13 04:30:00 (CST-6)
Location: ROFF
Magnitude: 1.00 
Reported by: COOP Observer

Hail in CARTER, OKLAHOMA
From 31-MAR-13 04:57:00 to 31-MAR-13 04:57:00 (CST-6)
Location: ARDMORE
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in MARSHALL, OKLAHOMA
From 31-MAR-13 05:00:00 to 31-MAR-13 05:00:00 (CST-6)
Location: OAKLAND
Magnitude: 1.00 
Reported by: Public