Alert archive / Missouri / Excessive Heat Warnings in 2023

Excessive Heat Warning 2, NWS St. Louis, MO

August 19, 202329 counties in Missouri; 17 counties in Illinois

NWS St. Louis, MO issued this excessive heat warning at Aug 19, 2023, 3:24 AM CDT for 29 counties in Missouri; 17 counties in Illinois. It took effect at Aug 20, 2023, 12:00 PM CDT. It was in force for 6 days. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 19, 2023, 3:24 AM CDT (08:24 UTC)
In effect from: Aug 20, 2023, 12:00 PM CDT
Expired: Aug 26, 2023, 2:29 PM CDT
In force: 6 days
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 08:28 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.

What forecasters said that day

The local office's own words before this excessive heat warning 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 excessive heat warning went out at Aug 18, 10:19 PM CDT, 5 hours 5 minutes earlier.

Area forecast discussion, Aug 18, 10:19 PM CDT, 5 hours 5 minutes before

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Nearby

Excessive Heat Warnings in Missouri, 2023 Excessive Heat Warnings in Illinois, 2023 Every excessive heat warning in 2023

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.