Strong area of low pressure moved into the forecast area with a dry line out ahead of the main cold front.  Storms fired up along and just ahead of the dry line beginning in the early afternoon hours.  There were numerous reports of large hail with isolated damaging winds and tornadoes with this event.

Tornado in MONTGOMERY, MISSOURI
From 25-MAY-11 13:15:00 to 25-MAY-11 13:22:00 (CST-6)
Location: NEW FLORENCE
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The tornado touched down just east of Highway 19 on County Road 219.  The tornado moved northeast to County Road 221, just south of County Road 226, where it struck a small farm causing extensive tree damage and minor damage to some of the outbuildings.   The tornado continued northeast to County Road 226, just east of intersection with County Road 221 where it affected another farmstead.  At this location, a metal machine shed lost most of the roofing with some of the tin blown approximately one half mile to the north-northeast.  Also, a grain bin was partially caved in and there was more significant tree damage.  On the next road north, County Road 227, a metal machine shed had the eastern portion of the roof partially caved in.  There was also minor tree damage.  On Highway V, approximately 2 miles east of Highway 161, another farm sustained damage.  Three outbuildings were destroyed and a full grown oak tree was snapped at the base.  Metal roofing was tossed northeast at least one half mile with a couple pieces wrapped around high tension power lines to the north of Highway V.  This was the most intense damage along the tornado path and was rated high end EF-1.  The tornado continued moving northeast causing minor tree damage along County Road 153 and finally dissipated in an open field west of County Road 141 about two miles northwest of Bellflower, MO.  The maximum width of the tornado was 100 yards and the path length was 7 miles.

Tornado in MADISON, MISSOURI
From 25-MAY-11 15:43:00 to 25-MAY-11 15:46:00 (CST-6)
Location: BUCKHORN
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The tornado originated in Carter County then crossed into Wayne County (WFO Paducah's CWA) before crossing into Madison County about 3 miles southwest of Buckhorn and travelled to the northeast.  In Madison County, numerous large trees were blown down before the tornado lifted and dissipated about a mile northwest of Buckhorn. The total path length for the tornado was 47.4 miles with a max width of 1200 yards and a max EF rating of EF3.

Tornado in MADISON, MISSOURI
From 25-MAY-11 16:26:00 to 25-MAY-11 16:28:00 (CST-6)
Location: MARQUAND
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado touched down about a mile and a half south of Marquand on State Highway DD.  It travelled to the northeast for about two miles before moving into Bollinger County (WFO Paducah's CWA).  It snapped off or uprooted numerous trees along its path in Madison County.  At its widest, the tree damage was 200 yards wide.  The total path length for the tornado was 13 miles with a max width of 250 yards and a max EF rating of EF1.

Hail in MONTGOMERY, MISSOURI
From 25-MAY-11 13:20:00 to 25-MAY-11 13:20:00 (CST-6)
Location: BUELL
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Hail in BOONE, MISSOURI
From 25-MAY-11 13:20:00 to 25-MAY-11 13:20:00 (CST-6)
Location: ASHLAND
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CALLAWAY, MISSOURI
From 25-MAY-11 13:39:00 to 25-MAY-11 13:39:00 (CST-6)
Location: KINGDOM CITY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in COLE, MISSOURI
From 25-MAY-11 13:08:00 to 25-MAY-11 13:08:00 (CST-6)
Location: ST MARTIN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CRAWFORD, MISSOURI
From 25-MAY-11 13:50:00 to 25-MAY-11 13:50:00 (CST-6)
Location: VIVIAN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in RALLS, MISSOURI
From 25-MAY-11 13:40:00 to 25-MAY-11 13:40:00 (CST-6)
Location: PERRY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ST. CHARLES, MISSOURI
From 25-MAY-11 14:05:00 to 25-MAY-11 14:07:00 (CST-6)
Location: GILMORE
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ST. LOUIS, MISSOURI
From 25-MAY-11 15:13:00 to 25-MAY-11 15:14:00 (CST-6)
Location: MEHLVILLE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in REYNOLDS, MISSOURI
From 25-MAY-11 14:10:00 to 25-MAY-11 14:10:00 (CST-6)
Location: REDFORD
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WARREN, MISSOURI
From 25-MAY-11 14:15:00 to 25-MAY-11 14:15:00 (CST-6)
Location: DUTZOW
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ST. LOUIS, MISSOURI
From 25-MAY-11 14:20:00 to 25-MAY-11 14:20:00 (CST-6)
Location: SHOVELTOWN
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in JEFFERSON, MISSOURI
From 25-MAY-11 14:29:00 to 25-MAY-11 14:29:00 (CST-6)
Location: DE SOTO
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in KNOX, MISSOURI
From 25-MAY-11 14:30:00 to 25-MAY-11 14:30:00 (CST-6)
Location: FABIUS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in JEFFERSON, MISSOURI
From 25-MAY-11 14:33:00 to 25-MAY-11 14:33:00 (CST-6)
Location: VICTORIA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in JEFFERSON, MISSOURI
From 25-MAY-11 14:57:00 to 25-MAY-11 14:57:00 (CST-6)
Location: BAYSHORE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in JEFFERSON, MISSOURI
From 25-MAY-11 15:00:00 to 25-MAY-11 15:05:00 (CST-6)
Location: BAYSHORE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in ST. CHARLES, MISSOURI
From 25-MAY-11 14:57:00 to 25-MAY-11 14:57:00 (CST-6)
Location: O FALLON
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in WASHINGTON, MISSOURI
From 25-MAY-11 15:02:00 to 25-MAY-11 15:05:00 (CST-6)
Location: SPRINGTOWN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ST. LOUIS (C), MISSOURI
From 25-MAY-11 15:28:00 to 25-MAY-11 15:35:00 (CST-6)
Location: TOWER GROVE
Magnitude: 4.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

A swath of large hail, some as large as softballs, fell across southern portions of the city.  There was considerable damage to plants and trees at the Missouri Botanical Gardens near Tower Grove Park.

Hail in ST. LOUIS, MISSOURI
From 25-MAY-11 15:07:00 to 25-MAY-11 15:10:00 (CST-6)
Location: OAKVILLE
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in LINCOLN, MISSOURI
From 25-MAY-11 14:35:00 to 25-MAY-11 14:35:00 (CST-6)
Location: APEX
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm winds blew down several power lines.

Hail in WASHINGTON, MISSOURI
From 25-MAY-11 15:10:00 to 25-MAY-11 15:10:00 (CST-6)
Location: CADET
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in ST. CHARLES, MISSOURI
From 25-MAY-11 15:10:00 to 25-MAY-11 15:10:00 (CST-6)
Location: ST PETERS
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew down numerous large tree limbs.

Hail in ST. LOUIS, MISSOURI
From 25-MAY-11 15:15:00 to 25-MAY-11 15:15:00 (CST-6)
Location: CRESTWOOD
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WASHINGTON, MISSOURI
From 25-MAY-11 15:15:00 to 25-MAY-11 15:15:00 (CST-6)
Location: BARYTIES
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ST. LOUIS, MISSOURI
From 25-MAY-11 15:15:00 to 25-MAY-11 15:15:00 (CST-6)
Location: SAPPINGTON
Magnitude: 3.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in ST. LOUIS, MISSOURI
From 25-MAY-11 15:20:00 to 25-MAY-11 15:20:00 (CST-6)
Location: WEBSTER GROVES
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in IRON, MISSOURI
From 25-MAY-11 14:47:00 to 25-MAY-11 14:49:00 (CST-6)
Location: ARCADIA
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds blew down numerous trees between Johnson Shut-Ins State Park and Ironton.

Thunderstorm Wind in ST. CHARLES, MISSOURI
From 25-MAY-11 15:15:00 to 25-MAY-11 15:15:00 (CST-6)
Location: ORCHARD FARM
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Hail in ST. LOUIS, MISSOURI
From 25-MAY-11 15:20:00 to 25-MAY-11 15:20:00 (CST-6)
Location: AFFTON
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ST. LOUIS (C), MISSOURI
From 25-MAY-11 15:32:00 to 25-MAY-11 15:32:00 (CST-6)
Location: ST LOUIS
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Large hail fell over the St. Louis University campus, some were as large as baseballs.

Hail in ST. LOUIS, MISSOURI
From 25-MAY-11 15:25:00 to 25-MAY-11 15:25:00 (CST-6)
Location: GRAVOIS
Magnitude: 4.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Softball size hail was reported at the intersection of Gravois Road and Heidelberg Avenue.

Thunderstorm Wind in ST. FRANCOIS, MISSOURI
From 25-MAY-11 15:50:00 to 25-MAY-11 15:50:00 (CST-6)
Location: FARMINGTON
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds blew down numerous large tree limbs and several power lines.

Hail in ST. LOUIS (C), MISSOURI
From 25-MAY-11 15:30:00 to 25-MAY-11 15:30:00 (CST-6)
Location: ST LOUIS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail up to one inch was reported downtown.

Thunderstorm Wind in ST. CHARLES, MISSOURI
From 25-MAY-11 15:30:00 to 25-MAY-11 15:30:00 (CST-6)
Location: COTTLEVILLE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm winds blew down a large tree. Part of the tree fell onto a house causing moderate damage.

Thunderstorm Wind in JEFFERSON, MISSOURI
From 25-MAY-11 15:53:00 to 25-MAY-11 15:53:00 (CST-6)
Location: MURPHY
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flash Flood in ST. LOUIS (C), MISSOURI
From 25-MAY-11 16:10:00 to 25-MAY-11 19:30:00 (CST-6)
Location: TOWER GROVE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Between one and two inches of rain fell in a very short period of time causing flash flooding.  There was 6 inches of water over Manchester Road just east of intersection with Hampton Avenue.

Hail in COLE, MISSOURI
From 25-MAY-11 13:00:00 to 25-MAY-11 13:00:00 (CST-6)
Location: LOHMAN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MONTGOMERY, MISSOURI
From 25-MAY-11 12:50:00 to 25-MAY-11 12:50:00 (CST-6)
Location: JONESBURG
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MONTGOMERY, MISSOURI
From 25-MAY-11 13:04:00 to 25-MAY-11 13:04:00 (CST-6)
Location: MONTGOMERY CITY
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MONTGOMERY, MISSOURI
From 25-MAY-11 13:15:00 to 25-MAY-11 13:15:00 (CST-6)
Location: MONTGOMERY CITY
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in MONTGOMERY, MISSOURI
From 25-MAY-11 13:19:00 to 25-MAY-11 13:19:00 (CST-6)
Location: MONTGOMERY CITY
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in LINCOLN, MISSOURI
From 25-MAY-11 14:30:00 to 25-MAY-11 14:33:00 (CST-6)
Location: WINFIELD
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm winds blew down several large trees on Highway EE, west of Winfield and a large tree onto Old Troy Road in Winfield.

Flash Flood in MONROE, MISSOURI
From 25-MAY-11 15:00:00 to 25-MAY-11 19:30:00 (CST-6)
Location: VICTOR
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

Over two inches of rain fell in a short amount of time causing flash flooding.  Several roads were flooded including the intersection of State Highways D and O.

Flash Flood in BOONE, MISSOURI
From 25-MAY-11 15:45:00 to 25-MAY-11 19:00:00 (CST-6)
Location: MIDWAY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

Up to two inches of rain fell in a short amount of time causing flash flooding.  Several roads were flooded including West Wilcox Road east of Highway E.

Tornado in MADISON, MISSOURI
From 25-MAY-11 15:35:00 to 25-MAY-11 15:41:00 (CST-6)
Location: MILLCREEK
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado touched down just to the southwest of Fredericktown near the intersection of County Roads 500 and 501 where large tree limbs were blown down.  The tornado then crossed Old U.S. 67 and either uprooted or snapped several cedar and oak trees as it moved northeast along County Road 201.  The diameter of the tree trunks ranged from 2 to 3 feet.  About 100 yards northeast of County Road 201, a machine shed composed of large cement bricks was severely damaged. Additional tree damage occurred north and northeast of the machine shed.  An older machine shed was damaged 100 yards southwest of the City of Fredericktown.  A two vehicle garage located across County Road 201 was completely destroyed. One vehicle in the garage was severely damaged.  Within the southwest city limits of Fredericktown medium to large branches (3 to 10 inches) in diameter were snapped by the tornado.  There was damage to a fence at a tennis court and also at a baseball park.  Additional tree damage was located just south of Main Street.  Half a mile northeast of the downtown area, medium size tree branches were downed in a residential area.  Some of the large tree limbs damaged one home.  Another nearby home lost over 60 percent of its roof covering.  The tornado then struck a distributing company which transports Styrofoam blocks on State Highway J just northeast of the intersection with Highway 72.  The large blocks weighing around 300 pounds each were tossed 40 to 80 yards to the northeast.   The tornado continued to the east along State Highway J for about another mile before lifting and dissipating.  The total damage track was 5.5 miles, while damage width was between 30 to 40 yards.  The damage intensity was rated EF1.

Tornado in MADISON, MISSOURI
From 25-MAY-11 15:47:00 to 25-MAY-11 15:51:00 (CST-6)
Location: ZION
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Another tornado formed about a mile north of the one that had touched down near the intersection of U.S. 67 and State Highway N.  It paralled the path of the other tornado lifting and dissipating about half a mile northeast of Madison County Road 303, about three quarters of a mile southeast of the intersection of U.S. 67 and Madison County Road 303.  The damage was limited to numerous large trees blown down or uprooted along its path.  The widest part of the damage path, about a third of a mile, was where the tornado crossed Madison County Road 303.

Hail in ST. LOUIS, MISSOURI
From 25-MAY-11 15:15:00 to 25-MAY-11 15:15:00 (CST-6)
Location: ST GEORGE
Magnitude: 2.75 
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail up to baseball size fell over portions of south St. Louis county.  At two dealerships on Tesson Ferry Road over 200 new cars were hit by the hail.  The hail shattered sunroofs and back windshields on several cars and caused a lot of dents.

Thunderstorm Wind in COLE, MISSOURI
From 25-MAY-11 13:15:00 to 25-MAY-11 13:20:00 (CST-6)
Location: HONEY CREEK
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Thunderstorm winds blew down several trees and power lines.  One tree fell and blocked Bald Hill Road till it could be cleared.

Tornado in MADISON, MISSOURI
From 25-MAY-11 15:46:00 to 25-MAY-11 15:51:00 (CST-6)
Location: CHOBB STORE
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado touched down just southwest of the intersection of U.S. 67 and State Highway N.  As it travelled to the northeast and crossed U.S. 67 it blew down or uprooted numerous trees.  The damage path width in this area was about 100 yards wide.  The tornado continued to the northeast knocking down a lot of trees.  As it crossed Madison County Road 303, about a mile southeast of the intersection with U.S. 67, the width of the tornado damage to the trees in this area was about a quarter of a mile wide.  The tornado continued to the northeast for about a mile before lifting and dissipating.

Thunderstorm Wind in CALLAWAY, MISSOURI
From 25-MAY-11 13:45:00 to 25-MAY-11 13:45:00 (CST-6)
Location: FULTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Thunderstorm winds blew down a large tree limb.  The limb took down a few power lines when it fell.

Hail in ST. FRANCOIS, MISSOURI
From 25-MAY-11 14:54:00 to 25-MAY-11 14:57:00 (CST-6)
Location: FARMINGTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in JEFFERSON, MISSOURI
From 25-MAY-11 14:56:00 to 25-MAY-11 14:56:00 (CST-6)
Location: IMPERIAL
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in ST. LOUIS, MISSOURI
From 25-MAY-11 15:12:00 to 25-MAY-11 15:12:00 (CST-6)
Location: MEHLVILLE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in ST. CHARLES, MISSOURI
From 25-MAY-11 14:41:00 to 25-MAY-11 14:41:00 (CST-6)
Location: WENTZVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in REYNOLDS, MISSOURI
From 25-MAY-11 14:01:00 to 25-MAY-11 14:06:00 (CST-6)
Location: ELLINGTON
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer