Early morning thunderstorms produced isolated wind damage across northeastern Oklahoma during the morning of the 19th but more widespread severe weather occurred later in the day. Severe thunderstorms developed across central Oklahoma along a dry line during the late afternoon hours. Very unstable air combined with very strong wind shear allowed these storms to evolve rapidly into supercells, which produced several damaging tornadoes in central Oklahoma before moving into eastern Oklahoma. Most of these supercell thunderstorms gradually weakened as they moved into the eastern portion of the state. The storm that produced damaging tornadoes around Shawnee also produced a strong tornado west and northwest of Prague, and another north northeast of Prague that moved across northwestern Okfuskee County. Another supercell produced a brief tornado northwest of Shamrock in northwestern Creek County before weakening as it moved further into northeastern Oklahoma. Large hail and damaging wind was reported across portions of northeastern Oklahoma during the evening.

Hail in OKMULGEE, OKLAHOMA
From 19-MAY-13 19:20:00 to 19-MAY-13 19:20:00 (CST-6)
Location: NUYAKA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in OKMULGEE, OKLAHOMA
From 19-MAY-13 19:30:00 to 19-MAY-13 19:30:00 (CST-6)
Location: BEGGS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in OSAGE, OKLAHOMA
From 19-MAY-13 20:10:00 to 19-MAY-13 20:10:00 (CST-6)
Location: SHIDLER ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

Thunderstorm Wind in OSAGE, OKLAHOMA
From 19-MAY-13 20:38:00 to 19-MAY-13 20:38:00 (CST-6)
Location: BURBANK
Magnitude: 56.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Post Office

A small barn was destroyed and several large tree limbs were blown down by strong thunderstorm wind.

Tornado in CREEK, OKLAHOMA
From 19-MAY-13 17:47:00 to 19-MAY-13 17:48:00 (CST-6)
Location: SHAMROCK
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

A brief tornado was photographed by a Fox23 storm chaser. No damage is known to have occurred from this tornado as it remained over open country.

Tornado in OKFUSKEE, OKLAHOMA
From 19-MAY-13 18:20:00 to 19-MAY-13 18:38:00 (CST-6)
Location: PADEN
Tornado F-scale: EF1
Property damage: 50.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This is the second segment of a three segment tornado, which began in Lincoln County north-northeast of Prague. In Okfuskee County, the tornado snapped or uprooted numerous trees and damaged several barns and outbuildings. Based on this damage, maximum estimated wind in this segment of the tornado was 100 to 110 mph. The tornado continued into Creek County, where it dissipated.

Tornado in CREEK, OKLAHOMA
From 19-MAY-13 18:38:00 to 19-MAY-13 18:40:00 (CST-6)
Location: IRON POST
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This is the third segment of a three segment tornado, continuing from Okfuskee County. In Creek County, this tornado snapped large tree limbs and uprooted a few small trees. Based on this damage, maximum estimated wind in this segment of the tornado was 85 to 95 mph.

Thunderstorm Wind in ROGERS, OKLAHOMA
From 19-MAY-13 01:41:00 to 19-MAY-13 01:41:00 (CST-6)
Location: CATOOSA
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Strong thunderstorm wind blew down a large tree branch onto a driveway.

Thunderstorm Wind in OSAGE, OKLAHOMA
From 19-MAY-13 20:41:00 to 19-MAY-13 20:41:00 (CST-6)
Location: BIGHEART
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Strong thunderstorm wind blew down large tree limbs.

Thunderstorm Wind in OSAGE, OKLAHOMA
From 19-MAY-13 21:01:00 to 19-MAY-13 21:01:00 (CST-6)
Location: FAIRFAX
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A large tree was blown down onto a roadway by strong thunderstorm winds.

Thunderstorm Wind in CRAIG, OKLAHOMA
From 19-MAY-13 22:12:00 to 19-MAY-13 22:12:00 (CST-6)
Location: WELCH
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Strong thunderstorm wind blew down several power poles.

Hail in CREEK, OKLAHOMA
From 19-MAY-13 17:40:00 to 19-MAY-13 17:40:00 (CST-6)
Location: DRUMRIGHT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Hail in CREEK, OKLAHOMA
From 19-MAY-13 18:08:00 to 19-MAY-13 18:08:00 (CST-6)
Location: NEW MANNFORD
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in WASHINGTON, OKLAHOMA
From 19-MAY-13 21:20:00 to 19-MAY-13 21:20:00 (CST-6)
Location: COPAN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in NOWATA, OKLAHOMA
From 19-MAY-13 21:43:00 to 19-MAY-13 21:43:00 (CST-6)
Location: SOUTH COFFEEVILLE AR
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Strong thunderstorm wind blew down a few power poles.