Numerous showers and storms formed under the influence of an upper level low across Oklahoma and western north Texas from the evening of the 20th throughout the day on the 21st.

Hail in WASHITA, OKLAHOMA
From 20-APR-17 22:45:00 to 20-APR-17 22:45:00 (CST-6)
Location: CORDELL
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Hail in CUSTER, OKLAHOMA
From 20-APR-17 23:08:00 to 20-APR-17 23:08:00 (CST-6)
Location: WEATHERFORD
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in CUSTER, OKLAHOMA
From 20-APR-17 23:12:00 to 20-APR-17 23:12:00 (CST-6)
Location: WEATHERFORD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Hail in CUSTER, OKLAHOMA
From 20-APR-17 23:20:00 to 20-APR-17 23:20:00 (CST-6)
Location: WEATHERFORD
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in COMANCHE, OKLAHOMA
From 20-APR-17 23:45:00 to 20-APR-17 23:45:00 (CST-6)
Location: MEERS
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in COMANCHE, OKLAHOMA
From 20-APR-17 23:57:00 to 20-APR-17 23:57:00 (CST-6)
Location: MT SCOTT
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in COMANCHE, OKLAHOMA
From 21-APR-17 00:13:00 to 21-APR-17 00:13:00 (CST-6)
Location: ELGIN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Hail in COMANCHE, OKLAHOMA
From 21-APR-17 00:14:00 to 21-APR-17 00:14:00 (CST-6)
Location: ELGIN
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in COMANCHE, OKLAHOMA
From 21-APR-17 00:21:00 to 21-APR-17 00:21:00 (CST-6)
Location: FLETCHER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in OKLAHOMA, OKLAHOMA
From 21-APR-17 01:35:00 to 21-APR-17 01:35:00 (CST-6)
Location: EDMOND
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in CUSTER, OKLAHOMA
From 21-APR-17 03:29:00 to 21-APR-17 03:29:00 (CST-6)
Location: WEATHERFORD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Reported via mping.

Hail in COMANCHE, OKLAHOMA
From 20-APR-17 23:57:00 to 20-APR-17 23:57:00 (CST-6)
Location: LAKE ELLSWORTH DAM
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Flash Flood in OKLAHOMA, OKLAHOMA
From 21-APR-17 07:15:00 to 21-APR-17 10:15:00 (CST-6)
Location: EDMOND
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Water over road at Danforth and Western. 5-6 cars stalled out.

Flash Flood in LOGAN, OKLAHOMA
From 21-APR-17 07:30:00 to 21-APR-17 10:30:00 (CST-6)
Location: SEWARD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Road closed at Coaltrain and Covell due to high water.

Flash Flood in CANADIAN, OKLAHOMA
From 21-APR-17 08:00:00 to 21-APR-17 11:00:00 (CST-6)
Location: OKARCHE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

At least one city street was closed due to flash flooding between 9 and 930 am.

Thunderstorm Wind in GRADY, OKLAHOMA
From 21-APR-17 08:05:00 to 21-APR-17 08:05:00 (CST-6)
Location: MINCO
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in GRADY, OKLAHOMA
From 21-APR-17 08:15:00 to 21-APR-17 08:15:00 (CST-6)
Location: CHICKASHA ARPT
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in GRADY, OKLAHOMA
From 21-APR-17 08:14:00 to 21-APR-17 08:14:00 (CST-6)
Location: CHICKASHA ARPT
Magnitude: 67.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in OKLAHOMA, OKLAHOMA
From 21-APR-17 08:22:00 to 21-APR-17 08:22:00 (CST-6)
Location: (OKC)WILL ROGERS APT
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in OKLAHOMA, OKLAHOMA
From 21-APR-17 08:24:00 to 21-APR-17 08:24:00 (CST-6)
Location: THE VILLAGE
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Measured at Cassidy school at Penn and Britton.

Thunderstorm Wind in OKLAHOMA, OKLAHOMA
From 21-APR-17 08:32:00 to 21-APR-17 08:32:00 (CST-6)
Location: EDMOND
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Measured at Armstrong college.

Flash Flood in OKLAHOMA, OKLAHOMA
From 21-APR-17 08:44:00 to 21-APR-17 11:44:00 (CST-6)
Location: SALT FORK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Water over the roadway at 206th between Rockwell and May.

Flash Flood in LOGAN, OKLAHOMA
From 21-APR-17 08:44:00 to 21-APR-17 11:44:00 (CST-6)
Location: SEWARD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Flooding at Douglass and Waterloo road.

Flash Flood in OKLAHOMA, OKLAHOMA
From 21-APR-17 08:44:00 to 21-APR-17 11:44:00 (CST-6)
Location: OKLAHOMA CITY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Flash flooding resulted in impassable lanes of I-235 at 36th ave.

Flash Flood in OKLAHOMA, OKLAHOMA
From 21-APR-17 08:44:00 to 21-APR-17 11:44:00 (CST-6)
Location: EDMOND
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

High water rescue at NW 192nd and Thornhill blvd.

Thunderstorm Wind in HUGHES, OKLAHOMA
From 21-APR-17 10:10:00 to 21-APR-17 10:10:00 (CST-6)
Location: CALVIN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Estimated 50-60 mph gust. No damage reported.

Thunderstorm Wind in HUGHES, OKLAHOMA
From 21-APR-17 10:15:00 to 21-APR-17 10:15:00 (CST-6)
Location: GERTY
Magnitude: 65.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Report of a roof blown off and tree damage.

Hail in JOHNSTON, OKLAHOMA
From 21-APR-17 16:30:00 to 21-APR-17 16:30:00 (CST-6)
Location: RAVIA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Hail in JOHNSTON, OKLAHOMA
From 21-APR-17 17:03:00 to 21-APR-17 17:03:00 (CST-6)
Location: COLEMAN
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CLEVELAND, OKLAHOMA
From 21-APR-17 07:15:00 to 21-APR-17 07:15:00 (CST-6)
Location: NORMAN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Thunderstorm Wind in OKLAHOMA, OKLAHOMA
From 21-APR-17 08:28:00 to 21-APR-17 08:28:00 (CST-6)
Location: VALLEY BROOK
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

No damage reported.

Hail in CLEVELAND, OKLAHOMA
From 21-APR-17 07:22:00 to 21-APR-17 07:22:00 (CST-6)
Location: NORMAN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Thunderstorm Wind in OKLAHOMA, OKLAHOMA
From 21-APR-17 08:15:00 to 21-APR-17 08:15:00 (CST-6)
Location: NICHOLS HILLS
Magnitude: 56.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Ten power poles were downed alone May ave between 63rd and Wilshire.

Thunderstorm Wind in LOVE, OKLAHOMA
From 21-APR-17 18:00:00 to 21-APR-17 18:00:00 (CST-6)
Location: MARIETTA
Magnitude: 65.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A street light was blown down and a roof blown off a building onto vehicle. Several trees were uprooted. A few other buildings sustained roof damage.