A cluster of showers and thunderstorms, extending from St. Louis metro area to southeastern Missouri, moved eastward through the afternoon and early evening hours. With precipitable water values over 2 inches and warm cloud depths up to 14,000 feet thick, these storms produced very heavy rainfall, up to five inches, in a short period of time, between 2 pm and 7 pm on July 28th. Also, the soil in the area was quite saturated due to the catastrophic flash flooding two days prior. This caused another round of flash flooding in portions of St. Louis County, St. Louis city, Jefferson County in Missouri and St. Clair County in Illinois.

Flash Flood in ST. LOUIS (C), MISSOURI
From 28-JUL-22 13:49:00 to 28-JUL-22 16:30:00 (CST-6)
Location: BADEN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Up to five inches fell in a three hour period causing flash flooding across the northern half of the city of St. Louis. Numerous roads were flooded including Washington Avenue near the intersection with Walton Avenue, south bound Skinker near Forest Park, Lindell Boulevard near Vandeventer Avenue, South Vandeventer Avenue just south of I-64 and Kingshighway Boulevard between Natural Bridge Avenue and St. Louis Avenue. Flash flooding in the 4700 block of Washington Avenue flooded a local daycare. The fire department had to rescue 15 children and 3 adults from the facility. No injuries were reported. Also, several dozen motorists had to be rescued from their flooded vehicles. Five city schools were damaged due to flooding. The flooding affected schools from north St. Louis to south. Soldan High School had at least 2 feet of water in the cafeteria on the basement floor. At least 4 businesses sustained water damage from the flooding in the Central West End. Both directions of Interstate 64 at Hampton Avenue and eastbound Interstate 70 at Union Boulevard were closed for part of the afternoon due to flooding.

Flash Flood in ST. LOUIS, MISSOURI
From 28-JUL-22 14:00:00 to 28-JUL-22 16:30:00 (CST-6)
Location: CLAYTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Up to four inches of rain fell in a three hour period causing flash flooding across the eastern portions of St. Louis County, including University City, Glendale, Brentwood and Maplewood areas. Numerous roads were flooded including McKnight Road where Deer Creek flows under it, Olive Blvd. and Skinker Blvd. intersection, and Waldron Avenue north of Olive Blvd.

Thunderstorm Wind in WASHINGTON, MISSOURI
From 28-JUL-22 13:39:00 to 28-JUL-22 13:39:00 (CST-6)
Location: IRONDALE
Magnitude: 56.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm winds blew down a large tree branch onto the roof of a house. The roof sustained minor damage.

Flash Flood in JEFFERSON, MISSOURI
From 28-JUL-22 14:50:00 to 28-JUL-22 17:45:00 (CST-6)
Location: PARKDALE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Up to three inches of rain fell in about an hour and a half causing flash flooding. Several roads in far northern portions of Jefferson County were briefly flooded. One vehicle became stuck in flood waters after being driven into the flooded section of roadway, about 3 miles southeast of Murphy. No injuries were reported.