⚠️ Flash Flood Warning – Montgomery, MO; St. Charles, MO; Warren, MO – Thursday, August 6, 2026

Flash Flood Warning issued August 6 at 4:35AM CDT until August 6 at 8:30AM CDT by NWS St Louis MO

Details

FFWLSX

The National Weather Service in St Louis has issued a

* Flash Flood Warning for…
Southern Montgomery County in east central Missouri…
Southwestern Saint Charles County in east central Missouri…
Warren County in east central Missouri…

* Until 830 AM CDT.

* At 435 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. The expected rainfall rate is 1
to 3 inches in 1 hour. Flash flooding is ongoing or expected to
begin shortly.

HAZARD…Flash flooding caused by thunderstorms.

SOURCE…Radar indicated.

IMPACT…Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.

* Some locations that will experience flash flooding include…
Warrenton, Wright City, Hermann, Marthasville, Jonesburg,
Truesdale, Innsbrook, Treloar, Big Spring, Dutzow, Foristell, High
Hill, Rhineland, McKittrick, Holstein and Americus.

This includes Interstate 70 in Missouri between exits 179 and 203.

Instructions

Turn around, don’t drown when encountering flooded roads. Most flood
deaths occur in vehicles.

This alert was automatically posted by SkyGuard, MWSC’s severe weather alerting system. Source: National Weather Service.