An organized severe weather outbreak affected southeast Missouri with numerous damaging wind gusts, a few swaths of large hail, and a weak tornado. By the afternoon hours, large amounts of moisture and instability were present, along with plenty of deep-layer wind shear. As a mid-level disturbance lifted out of the Southern Plains, multiple storm clusters and bowing segments formed across Missouri in a very favorable environment for severe thunderstorms. There was also a supercell thunderstorm in the Ozark foothills during the evening. Dew points were in the lower 70's in many locations in the afternoon, coupled with surface cape values of 3000-4000 j/kg. Boundaries left over from early morning storms also played a role in the placement of afternoon thunderstorm development. Multiple rounds of severe thunderstorms impacted the middle Mississippi Valley on the first day of the Memorial Day holiday weekend. There were two or three bowing lines of thunderstorms that impacted the region with damaging winds. Individual cells and clusters also developed early on in the event, producing both large hail and strong winds. Multiple rounds of storms over the same locations also resulted in locally heavy rainfall. Rainfall totals of 1.5 to 3 inches were observed from Carter County, Missouri east into southern Scott County.

Thunderstorm Wind in CAPE GIRARDEAU, MISSOURI
From 27-MAY-17 14:35:00 to 27-MAY-17 14:35:00 (CST-6)
Location: NEELYS LNDG
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Power lines were down on County Road 525.

Hail in WAYNE, MISSOURI
From 27-MAY-17 15:47:00 to 27-MAY-17 15:47:00 (CST-6)
Location: PIEDMONT
Magnitude: 2.75 
Reported by: Social Media

Baseball-size hail was photographed and relayed via social media.

Thunderstorm Wind in CARTER, MISSOURI
From 27-MAY-17 16:05:00 to 27-MAY-17 16:05:00 (CST-6)
Location: VAN BUREN
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several trees were blown down around town. Power was out to several homes and businesses, including the county sheriff department.

Thunderstorm Wind in WAYNE, MISSOURI
From 27-MAY-17 16:15:00 to 27-MAY-17 16:15:00 (CST-6)
Location: GREENVILLE
Magnitude: 61.00 EG
Property damage: 60.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Multiple trees were uprooted on D Highway a few miles southeast of Greenville. One vehicle was struck by a falling tree, with minor injuries. Multiple trees were down in a campground. In Greenville, trees and power lines were down.

Thunderstorm Wind in BOLLINGER, MISSOURI
From 27-MAY-17 16:22:00 to 27-MAY-17 16:22:00 (CST-6)
Location: MARBLE HILL
Magnitude: 56.00 EG
Property damage: 4.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Roof shingles were damaged.

Thunderstorm Wind in CAPE GIRARDEAU, MISSOURI
From 27-MAY-17 16:33:00 to 27-MAY-17 16:43:00 (CST-6)
Location: JACKSON
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Large tree limbs and branches were blown down in Jackson. In the far eastern part of the county near Trail of Tears State Park, a large tree was blown across the road and large limbs were down.

Thunderstorm Wind in PERRY, MISSOURI
From 27-MAY-17 16:35:00 to 27-MAY-17 16:45:00 (CST-6)
Location: PERRYVILLE
Magnitude: 61.00 EG
Property damage: 7.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Power lines were snapped, and trees were down across the county. In Perryville, wind gusts were estimated by law enforcement near 60 mph. In Crosstown, a trained spotter estimated winds gusted to 60 mph.

Thunderstorm Wind in STODDARD, MISSOURI
From 27-MAY-17 16:45:00 to 27-MAY-17 16:45:00 (CST-6)
Location: DEXTER
Magnitude: 70.00 EG
Property damage: 65.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Roofs were blown off a movie theater and car wash. Several homes in the same area sustained roof damage.

Hail in CAPE GIRARDEAU, MISSOURI
From 27-MAY-17 14:45:00 to 27-MAY-17 14:45:00 (CST-6)
Location: POCAHONTAS
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CARTER, MISSOURI
From 27-MAY-17 18:40:00 to 27-MAY-17 18:40:00 (CST-6)
Location: EASTWOOD
Magnitude: 2.00 
Reported by: Trained Spotter

The hail was slightly larger than golf balls. This same storm continued east, producing large hail near Ellsinore farther along its path.

Tornado in BUTLER, MISSOURI
From 27-MAY-17 19:18:00 to 27-MAY-17 19:22:00 (CST-6)
Location: STRINGTOWN
Tornado F-scale: EF0
Property damage: 40.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The tornado began near the intersection of Highway PP and County Road 429 in the Mark Twain National Forest. The tornado was on the ground for four minutes. It lifted before crossing U.S. Highway 67 west of Poplar Bluff. Several trees were uprooted, and numerous limbs were broken. At least two homes received minor damage due to falling trees. At least six homes received shingle damage. Peak winds were estimated near 85 mph. A trained spotter witnessed the funnel in the area. This tornado was from the same supercell storm that produced large hail from the Ellsinore area of Carter County to areas north of Poplar Bluff.

Hail in MISSISSIPPI, MISSOURI
From 27-MAY-17 15:15:00 to 27-MAY-17 15:15:00 (CST-6)
Location: BERTRAND
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported nickel to quarter-size hail.

Hail in BUTLER, MISSOURI
From 27-MAY-17 19:20:00 to 27-MAY-17 19:35:00 (CST-6)
Location: POPLAR BLUFF
Magnitude: 1.75 
Reported by: Emergency Manager

A swath of large hail accompanied a supercell thunderstorm across Butler County. Hailstones ranging from the size of ping-pong balls to golf balls were reported northwest through northeast of Poplar Bluff.

Hail in CARTER, MISSOURI
From 27-MAY-17 18:58:00 to 27-MAY-17 19:05:00 (CST-6)
Location: HUNTER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A swath of large hail extended from west to east across parts of the county. Quarter-size hail was reported on Highway 21 near U.S. Highway 60, between Hunter and Ellsinore. Quarter-size hail occurred on U.S. Highway 60 near Ellsinore.

Hail in NEW MADRID, MISSOURI
From 27-MAY-17 19:50:00 to 27-MAY-17 19:50:00 (CST-6)
Location: PARMA
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm Wind in MISSISSIPPI, MISSOURI
From 27-MAY-17 17:26:00 to 27-MAY-17 17:26:00 (CST-6)
Location: WOLF IS
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A wind gust to 66 mph was measured at a CWOP (Citizen Weather Observer Program) station near the Mississippi River southeast of East Prairie.

Flood in SCOTT, MISSOURI
From 27-MAY-17 18:10:00 to 27-MAY-17 19:10:00 (CST-6)
Location: SIKESTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Unknown

Street flooding was reported in the Sikeston area.

Hail in SCOTT, MISSOURI
From 27-MAY-17 17:00:00 to 27-MAY-17 17:00:00 (CST-6)
Location: SIKESTON HOLYFLD ARP
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm Wind in SCOTT, MISSOURI
From 27-MAY-17 17:00:00 to 27-MAY-17 17:00:00 (CST-6)
Location: SIKESTON HOLYFLD ARP
Magnitude: 78.00 MG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

An amateur radio operator measured a wind gust to 90 mph for about 20 seconds. Some shingles were blown off a nearby house. The anemometer height was about 80 feet above ground level.

Hail in BOLLINGER, MISSOURI
From 27-MAY-17 15:55:00 to 27-MAY-17 15:55:00 (CST-6)
Location: MARBLE HILL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager