Alert archive / Missouri / Flood Watches in 2026

Flood Watch 11, NWS St. Louis, MO

August 5, 202624 counties in Missouri; 9 counties in Illinois

NWS St. Louis, MO issued this flood watch at Aug 5, 2026, 1:57 AM CDT for 24 counties in Missouri; 9 counties in Illinois. It took effect at Aug 5, 2026, 10:00 PM CDT. It was in force for 15 hr.

The area

The counties it named.

The facts

Issued: Aug 5, 2026, 1:57 AM CDT (06:57 UTC)
In effect from: Aug 5, 2026, 10:00 PM CDT
Expired: Aug 6, 2026, 1:00 PM CDT
In force: 15 hr
Issued by: NWS St. Louis, MO
Flood severity: None

All 33 counties

Adams County, IL, Brown County, IL, Calhoun County, IL, Greene County, IL, Jersey County, IL, Madison County, IL, Monroe County, IL, Pike County, IL, Saint Clair County, IL, Audrain County, MO, Boone County, MO, Callaway County, MO, City of Saint Louis, MO, Cole County, MO, Crawford County, MO, Franklin County, MO, Gasconade County, MO, Jefferson County, MO, Knox County, MO, Lewis County, MO, Lincoln County, MO, Marion County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Osage County, MO, Pike County, MO, Ralls County, MO, Saint Charles County, MO, Saint Louis County, MO, Shelby County, MO, Warren County, MO, Washington County, MO

The radar

The St Louis radar (KLSX), 57 km from the middle of the area, began a volume at 07:00 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What forecasters said that day

The local office's own words before this flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS St. Louis, MO wrote its last area forecast discussion before this flood watch went out at Aug 4, 10:47 PM CDT, 3 hours 10 minutes earlier.

Area forecast discussion, Aug 4, 10:47 PM CDT, 3 hours 10 minutes before

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Nearby

Flood Watches in Missouri, 2026 Flood Watches in Illinois, 2026 Every flood watch in 2026

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.