A strong spring storm system brought multiple rounds of thunderstorms and heavy rain to the southeast half of Missouri during the weekend of April 29th-30th.  Rainfall totals surpassed nine inches in some locations and this led to flash flooding and historic flooding along some of the tributaries of the Missouri and Mississippi Rivers. Areas along the Meramec River were especially hard hit as new records were set at Steelville, Sullivan, and Eureka. The previous records had just recently been set during the late December flooding of 2015. Two major highways, I-44 and I-55 were shut down for a number of days due to the record river flooding from this event. A few thunderstorms also became severe during the afternoon of April 29th, with two weak tornadoes documented.

Flash Flood in BOONE, MISSOURI
From 29-APR-17 13:11:00 to 29-APR-17 20:45:00 (CST-6)
Location: RUCKER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Between 3 and 6 inches of rain fell causing flash flooding. Numerous roads were flooded including Route V northwest of Hallsville. About 3 miles north of Ashland, a water rescue had to be performed at Angel Lane and U.S. Highway 63.

Flash Flood in LINCOLN, MISSOURI
From 29-APR-17 19:32:00 to 29-APR-17 22:00:00 (CST-6)
Location: OLNEY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Between 3 and 6 inches of rain fell causing flash flooding. Numerous roads were flooded including Route BB just west southwest of Davis.

Flash Flood in STE. GENEVIEVE, MISSOURI
From 29-APR-17 10:00:00 to 30-APR-17 00:45:00 (CST-6)
Location: WOMACK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Between four and eight inches of rain fell causing widespread flash flooding. Numerous roads were flooded including Route C near Weingarten, and Highways A and B west and southwest of Ste. Genevieve.

Flash Flood in CRAWFORD, MISSOURI
From 29-APR-17 11:25:00 to 30-APR-17 00:45:00 (CST-6)
Location: BOURBON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Four to seven inches of rain fell causing widespread flash flooding. Numerous roads were flooded including Route E about five miles east northeast of Steelville.

Hail in AUDRAIN, MISSOURI
From 30-APR-17 16:55:00 to 30-APR-17 16:55:00 (CST-6)
Location: BASSINGER CORNER
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flash Flood in REYNOLDS, MISSOURI
From 29-APR-17 05:30:00 to 30-APR-17 00:45:00 (CST-6)
Location: GREELEY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Between 7 and 10 inches of rain fell causing widespread flash flooding. Numerous roads were flooded across Reynolds County including Route F west of Ellington. A number of water rescues had to be performed in Ellington due to Logan Creek rising well above its banks. Also, there were water rescues performed in Lesterville due to flash flooding. In Ellington, the only grocery store and a Dollar General store were flooded.

Hail in ST. CHARLES, MISSOURI
From 29-APR-17 14:30:00 to 29-APR-17 14:30:00 (CST-6)
Location: ST CHARLES
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flood in COLE, MISSOURI
From 30-APR-17 16:00:00 to 30-APR-17 23:59:00 (CST-6)
Location: JEFFERSON CITY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The Moreau River went above major flood stage during the evening hours of April 30th due to very heavy rain over the river basin. A number of secondary roads were closed due to the river flooding. Also, the river rose to the bottom of Tanner Bridge. No structures were affected by the flooding.

Thunderstorm Wind in ST. LOUIS, MISSOURI
From 29-APR-17 14:51:00 to 29-APR-17 14:51:00 (CST-6)
Location: FLORISSANT
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew down a one foot diameter tree.

Flood in CRAWFORD, MISSOURI
From 30-APR-17 15:00:00 to 30-APR-17 23:59:00 (CST-6)
Location: FOX SPGS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The Meramec River rose well above major flood stage at Steelville due to very heavy rain that fell across the river basin. Numerous roads along the flow of the river were flooded as well as a number of camp grounds, as well as, a couple of hotels.

Flood in FRANKLIN, MISSOURI
From 30-APR-17 15:00:00 to 30-APR-17 23:59:00 (CST-6)
Location: SULLIVAN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The Meramec River at Sullivan and Pacific rose above major stage during the day on April 30th. Numerous roads were flooded, as well as, several camp grounds and parks. In Pacific, numerous homes and businesses were flooded.

Flood in JEFFERSON, MISSOURI
From 30-APR-17 22:30:00 to 30-APR-17 23:59:00 (CST-6)
Location: HOENE SPG
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The Meramec and Big Rivers rose above major flood stage in the late evening hours of April 30th due to the heavy rainfall. A number of roads were closed due to the river flooding. A 77-year old man drowned when he walked to a creek (that feeds into the nearby Big River) near his house (off of Mimi Mountain Road and Highway BB) to survey the rising water, slipped and was swept away by the current. His body was recovered about three quarters of a mile downstream.

Flood in LINCOLN, MISSOURI
From 30-APR-17 10:00:00 to 30-APR-17 23:59:00 (CST-6)
Location: DAVIS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The Cuivre River crested just above major stage at Troy, while it rose to about 2 feet over major stage at Old Monroe due to the heavy rainfall. Numerous roads were flooded due to the river flooding.

Flash Flood in MADISON, MISSOURI
From 29-APR-17 05:30:00 to 30-APR-17 00:45:00 (CST-6)
Location: FARO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Seven to ten inches of rain fell causing widespread flash flooding. Numerous roads were flooded including Highway V between County Road 243 and Route F. Levee along Castor River in Marquand was overtopped. Flooding occurred on the south side of town. Several people were moved to higher ground from a senior center in the area. Also, the intersection of Highways A and M, west of town and the river were closed due to flooding on bridge that goes over the Castor River. About 2 miles south southeast of Marquand, a water rescue had to be performed at a campground off Highway DD.

Flash Flood in ST. FRANCOIS, MISSOURI
From 29-APR-17 06:00:00 to 30-APR-17 00:45:00 (CST-6)
Location: IRON MTN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Five to eight inches of rain fell causing widespread flash flooding. Numerous roads were flooded including Highway 221 in numerous locations, Highway D north of Farmington, Highway OO at Highway DD west of Farmington, Highway F southeast of Farmington, and King School Road in Iron Mountain Lake.

Flash Flood in MONTGOMERY, MISSOURI
From 29-APR-17 15:35:00 to 29-APR-17 22:00:00 (CST-6)
Location: WELLSVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Between 4 and 6 inches of rain fell causing flash flooding. Numerous roads were flooded including Routes K and J, as well as Highway 161 near Buell.

Flash Flood in PIKE, MISSOURI
From 29-APR-17 15:25:00 to 29-APR-17 22:00:00 (CST-6)
Location: ANNADA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Between 3 and 6 inches of rain fell causing widespread flash flooding.  Numerous roads were flooded including Highway 79 just northwest of Louisiana.

Flash Flood in WASHINGTON, MISSOURI
From 29-APR-17 12:25:00 to 30-APR-17 00:45:00 (CST-6)
Location: COURTOIS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Between 5 and 7 inches of rain fell causing widespread flash flooding. Numerous roads were flooded including Route CC between Highway 21 and Route E.

Tornado in ST. CHARLES, MISSOURI
From 29-APR-17 14:31:00 to 29-APR-17 14:35:00 (CST-6)
Location: KAMPVILLE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A weak tornado touched down to the southwest of the intersection of Missouri Highway B and Huster Road causing minor damage to trees in this area and traveled northeast to the small community of South Shore where several single family homes experienced minor damage, while outbuildings or sheds were destroyed. Damage to structures and trees were consistent with wind speeds of 80 mph. The tornado moved northeast and intersected a line of parked campers and boats along Dwyer Club Road. At least half of a dozen boats and campers were tossed to the northeast and destroyed by the tornado. Several trees in this area were uprooted, mainly due to the very wet soil. The damage path was 100 yards wide at this location. The tornado then hit an outbuilding on Dwyer Road, lifting most of the roof panels to the northeast. The tornado passed just to the east of Yacht Club Harbor with only a few tree limbs broken in this area. The Lake Center Marina did not fare so well, with two boat docks lifted and twisted into the trees on the south end of the property. The tornado lifted shortly thereafter with no visible damage to the north of this location. Overall, the tornado was rated EF0 with max wind speeds of 80 MPH.  Path length is 3.85 miles with a max path width of 100 yards.

Thunderstorm Wind in MONROE, MISSOURI
From 30-APR-17 15:35:00 to 30-APR-17 15:35:00 (CST-6)
Location: PARIS
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Thunderstorm winds snapped a pole off and lifted a shed into a home in town. Also, several power lines were blown down around town.

Flash Flood in MONITEAU, MISSOURI
From 29-APR-17 15:47:00 to 29-APR-17 20:45:00 (CST-6)
Location: TIPTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Between 4 and 6 inches of rain caused flash flooding. Numerous roads were flooded including Route D northwest of Kliever.

Hail in ST. LOUIS, MISSOURI
From 29-APR-17 14:39:00 to 29-APR-17 14:39:00 (CST-6)
Location: BRIDGETON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flash Flood in OSAGE, MISSOURI
From 29-APR-17 18:00:00 to 29-APR-17 20:45:00 (CST-6)
Location: META
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Between 4 and 6 inches of rain caused flash flooding. Numerous roads were flooded including Route RA southeast of Linn.

Flood in OSAGE, MISSOURI
From 30-APR-17 14:00:00 to 30-APR-17 16:00:00 (CST-6)
Location: ARGYLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The Maries River rose to major flood levels for a couple of hours due to the heavy rainfall in the basin. A number of county and state roads near the river were flooded. However, no structures were affected by the flooding.

Flood in ST. LOUIS, MISSOURI
From 30-APR-17 22:30:00 to 30-APR-17 23:59:00 (CST-6)
Location: CLIFF CAVE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The Meramec River at Eureka and Valley Park rose to just above major flood stage in the late evening hours of April 30th due to the heavy rainfall. A number of roads were closed due to the river flooding including Highway 141 where it goes under I-44.

Flash Flood in IRON, MISSOURI
From 29-APR-17 05:30:00 to 30-APR-17 00:45:00 (CST-6)
Location: VIBURNUM
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Between 7 and 10 inches of rain fell causing widespread flash flooding. Numerous roads across the county were flooded and closed including Routes C, F, D, and CC, as well as Highways 72, 143 and 221. Big Creek RV Park was flooded and had to be evacuated. The Missouri Pacific railroad tracks south of Annapolis were undermined by the flood water and a section was washed out. Also, several bridges had both ends washed out due to the flash flooding.