Alert archive / Missouri / Heat Advisories in 2026
Heat Advisory 8, NWS St. Louis, MO
NWS St. Louis, MO issued this heat advisory at Aug 30, 2026, 12:27 PM CDT for 29 counties in Missouri; 17 counties in Illinois. It took effect at Aug 31, 2026, 12:00 PM CDT. It was in force for 60 hr.
The area
The counties it named.
The facts
- Issued
- Aug 30, 2026, 12:27 PM CDT (17:27 UTC)
- In effect from
- Aug 31, 2026, 12:00 PM CDT
- Expired
- Sep 3, 2026, 12:12 AM CDT
- In force
- 60 hr
- Issued by
- NWS St. Louis, MO
All 46 counties
Adams County, IL, Bond County, IL, Brown County, IL, Calhoun County, IL, Clinton County, IL, Fayette County, IL, Greene County, IL, Jersey County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Monroe County, IL, Montgomery County, IL, Pike County, IL, Randolph County, IL, Saint Clair County, IL, Washington 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, Iron County, MO, Jefferson County, MO, Knox County, MO, Lewis County, MO, Lincoln County, MO, Madison County, MO, Marion County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Osage County, MO, Pike County, MO, Ralls County, MO, Reynolds County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Shelby County, MO, Warren County, MO, Washington County, MO
The radar
The St Louis radar (KLSX), 18 km from the middle of the area, began a volume at 17:28 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.
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 12:27 PM CDT | Extreme Heat Watch | LSX | Saint Charles, Saint Louis, City of Saint Louis | 11 hr |
Nearby
Heat Advisories in Missouri, 2026Heat Advisories in Illinois, 2026Every heat advisory 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.