A cold front dropped south across forecast area triggering showers and thunderstorms. Some of the storms produced large hail, damaging winds and a couple of tornadoes.

Thunderstorm Wind in WARREN, MISSOURI
From 26-APR-16 12:10:00 to 26-APR-16 12:10:00 (CST-6)
Location: HOLSTEIN
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew down several trees in Treloar.

Hail in ST. LOUIS, MISSOURI
From 26-APR-16 12:50:00 to 26-APR-16 12:50:00 (CST-6)
Location: EUREKA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Tornado in ST. CHARLES, MISSOURI
From 26-APR-16 12:24:00 to 26-APR-16 12:25:00 (CST-6)
Location: CAPPELN
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A weak EF-0 tornado briefly touched down just south of the intersection of Highway D and Highway T, roughly 4 miles west-southwest of New Melle.  Trees were topped and twisted and metal roofing from a large outbuilding was thrown up to 200 yard to the north of the tornado path. The path length was 0.32 miles and max path width was 50 yards.

Thunderstorm Wind in ST. CHARLES, MISSOURI
From 26-APR-16 12:55:00 to 26-APR-16 13:00:00 (CST-6)
Location: WELDON
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds caused widespread tree damage in the Whitmoor Country Club area. A flag pole and a mailbox pole were snapped in half. One large tree branch landed on the roof of a house causing moderate damage.

Thunderstorm Wind in WARREN, MISSOURI
From 26-APR-16 12:10:00 to 26-APR-16 12:21:00 (CST-6)
Location: HOPEWELL
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

An enhanced area of wind damage was surveyed from 6 miles north-northwest of Marthasville (Warren County) to 1 mile north of Defiance (St. Charles County). The area of wind damage was roughly 3 miles wide and 20.5 miles long.  Thousands of trees were either topped, snapped or uprooted in this swath.  Many roads were blocked in this area due to fallen trees and power lines.  There was also several outbuildings that lost roofs and residences that suffered minor damage. The wind is estimated to have been as high as 80 mph and lasted upward of 5 minutes according to eyewitness accounts.

Hail in ST. LOUIS, MISSOURI
From 26-APR-16 13:08:00 to 26-APR-16 13:08:00 (CST-6)
Location: OVERLAND
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in FRANKLIN, MISSOURI
From 26-APR-16 12:20:00 to 26-APR-16 12:20:00 (CST-6)
Location: WASHINGTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A couple of large tree limbs were blown down.

Hail in FRANKLIN, MISSOURI
From 26-APR-16 12:30:00 to 26-APR-16 12:30:00 (CST-6)
Location: VILLA RIDGE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm Wind in WARREN, MISSOURI
From 26-APR-16 12:20:00 to 26-APR-16 12:20:00 (CST-6)
Location: DUTZOW
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm winds blew down numerous trees just east of Innsbrook.

Thunderstorm Wind in ST. CHARLES, MISSOURI
From 26-APR-16 12:35:00 to 26-APR-16 12:40:00 (CST-6)
Location: NEW MELLE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew down several large tree limbs in an area from 2 miles northwest of New Melle to about a mile north of New Melle, near the intersection of Foristell Road and Highway Z.

Thunderstorm Wind in FRANKLIN, MISSOURI
From 26-APR-16 12:40:00 to 26-APR-16 12:40:00 (CST-6)
Location: ST ALBANS
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew down several large trees as well as large tree limbs in St. Albans, north of Highway T.

Thunderstorm Wind in ST. LOUIS, MISSOURI
From 26-APR-16 12:50:00 to 26-APR-16 12:52:00 (CST-6)
Location: (SUS)SPIRIT/ST LOUIS
Magnitude: 58.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm winds uprooted a large tree in Chesterfield.

Thunderstorm Wind in ST. LOUIS, MISSOURI
From 26-APR-16 12:45:00 to 26-APR-16 12:45:00 (CST-6)
Location: EUREKA
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ST. CHARLES, MISSOURI
From 26-APR-16 12:52:00 to 26-APR-16 12:52:00 (CST-6)
Location: WELDON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Hail in ST. LOUIS, MISSOURI
From 26-APR-16 13:10:00 to 26-APR-16 13:10:00 (CST-6)
Location: BRIDGETON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in ST. LOUIS, MISSOURI
From 26-APR-16 13:10:00 to 26-APR-16 13:10:00 (CST-6)
Location: BRENTWOOD
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm winds blew several large trees and uprooted another large tree in Brentwood.

Thunderstorm Wind in ST. LOUIS, MISSOURI
From 26-APR-16 13:17:00 to 26-APR-16 13:19:00 (CST-6)
Location: (STL)LAMBERT FLD ST
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm winds blew down several large tree limbs around Hazelwood.

Thunderstorm Wind in ST. CHARLES, MISSOURI
From 26-APR-16 13:27:00 to 26-APR-16 13:29:00 (CST-6)
Location: ORCHARD FARM
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm winds caused minor damage to two buildings.  The rubber roof membrane was lifted by the winds allowing some water into the buildings.

Tornado in WARREN, MISSOURI
From 26-APR-16 11:52:00 to 26-APR-16 12:02:00 (CST-6)
Location: BERNHEIMER
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado caused significant tree damage across portions of southwestern Warren County. The tornado touched down on River Ridge Lane and traveled to the east southeast. The most significant damage occurred along Bernheimer Road where up to 100 large trees were snapped and twisted in a convergent pattern to the east-southeast. From there the tornado crossed Highway 94 at least 3 times. Eventually the tornado lifted and dissipated just east of Howard Branch Road, just north of intersection with Smith Green Road.  The tornado was rated EF1, with a path length of 5.46 miles and a max path width of 100 yards.

Hail in MONITEAU, MISSOURI
From 26-APR-16 10:12:00 to 26-APR-16 10:12:00 (CST-6)
Location: JAMESTOWN
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in MONITEAU, MISSOURI
From 26-APR-16 10:22:00 to 26-APR-16 10:26:00 (CST-6)
Location: LATHAM
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MONITEAU, MISSOURI
From 26-APR-16 10:26:00 to 26-APR-16 10:26:00 (CST-6)
Location: LATHAM
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BOONE, MISSOURI
From 26-APR-16 10:33:00 to 26-APR-16 10:33:00 (CST-6)
Location: ASHLAND
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in JEFFERSON, MISSOURI
From 26-APR-16 12:37:00 to 26-APR-16 12:50:00 (CST-6)
Location: DITTMER
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail up to ping pong ball size fell in an area from Dittmer to just north of Cedar Hill.

Thunderstorm Wind in BOONE, MISSOURI
From 26-APR-16 10:37:00 to 26-APR-16 10:37:00 (CST-6)
Location: (COU)COLUMBIA RGNL A
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in BOONE, MISSOURI
From 26-APR-16 10:40:00 to 26-APR-16 10:40:00 (CST-6)
Location: MURRY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds blew down several large trees about 3 miles southeast of Hallsville.

Hail in CALLAWAY, MISSOURI
From 26-APR-16 10:44:00 to 26-APR-16 10:50:00 (CST-6)
Location: NEW BLOOMFIELD
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A wide swath of large hail fell from 5 miles west of New Bloomfield to the southwest side of Fulton.  Five miles west of New Bloomfield, several homes sustained siding and tree damage from the large hail. Most of the hail in this location were an inch in diameter, but the biggest hail stones were 2 inches in diameter.

Hail in OSAGE, MISSOURI
From 26-APR-16 10:55:00 to 26-APR-16 10:55:00 (CST-6)
Location: BONNOTS MILL
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in AUDRAIN, MISSOURI
From 26-APR-16 11:00:00 to 26-APR-16 11:00:00 (CST-6)
Location: MEXICO
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds blew down several telephone wires around town.

Thunderstorm Wind in CALLAWAY, MISSOURI
From 26-APR-16 11:05:00 to 26-APR-16 11:05:00 (CST-6)
Location: MOKANE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm winds blew down a couple of power lines, a few trees, tree limbs and some siding from a house.

Thunderstorm Wind in GASCONADE, MISSOURI
From 26-APR-16 11:40:00 to 26-APR-16 11:40:00 (CST-6)
Location: HERMANN
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GASCONADE, MISSOURI
From 26-APR-16 11:40:00 to 26-APR-16 11:50:00 (CST-6)
Location: BLAND
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in MONTGOMERY, MISSOURI
From 26-APR-16 11:55:00 to 26-APR-16 11:55:00 (CST-6)
Location: LIEGE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew down several trees around town. Most were between 15 and 25 feet tall.

Thunderstorm Wind in FRANKLIN, MISSOURI
From 26-APR-16 12:05:00 to 26-APR-16 12:05:00 (CST-6)
Location: UNION
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm Wind in ST. CHARLES, MISSOURI
From 26-APR-16 12:21:00 to 26-APR-16 12:38:00 (CST-6)
Location: CAPPELN
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

An enhanced area of wind damage was surveyed from 6 miles north-northwest of Marthasville (Warren County) to 1 mile north of Defiance (St. Charles County). The area of wind damage was roughly 3 miles wide and 20.5 miles long.  Thousands of trees were either topped, snapped or uprooted in this swath.  Many roads were blocked in this area due to fallen trees and power lines.  There was also several outbuildings that lost roofs and residences that suffered minor damage. The wind is estimated to have been as high as 80 mph and lasted upward of 5 minutes according to eyewitness accounts.