Mendon, MO Warnings, Watches and Advisories
NWS Active Alerts for MO - Map View
Heat Advisory
Bond; Clinton; Marion; Washington; Randolph; Madison; St. Clair; Monroe; Moniteau; Cole; Osage; Gasconade; Warren; St. Charles; Franklin; St. Louis; St. Louis City; Jefferson; Crawford; Washington; St. Francois; Ste. Genevieve; Iron; Madison; Reynolds
Heat Advisory issued September 19 at 12:51PM CDT until September 19 at 8:00PM CDT by NWS St Louis MO
* WHAT...Heat index values up to 101. * WHERE...Portions of south central and southwest Illinois and central, east central, and southeast Missouri. * WHEN...Until 8 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
Moderate
Likely
Expected
September 19th, 2026 12:51:00 pm CDT
September 19th, 2026 12:51:00 pm CDT
September 19th, 2026 08:00:00 pm CDT
Heat Advisory
Bourbon; Crawford; Cherokee; Benton; Morgan; Miller; Maries; Vernon; St. Clair; Hickory; Camden; Pulaski; Phelps; Barton; Cedar; Polk; Dallas; Laclede; Texas; Dent; Jasper; Dade; Greene; Webster; Wright; Newton; Lawrence; Christian; Douglas; Howell; Shannon; McDonald; Barry; Stone; Taney; Ozark; Oregon
Heat Advisory issued September 19 at 12:19PM CDT until September 19 at 8:00PM CDT by NWS Springfield MO
* WHAT...Heat index values up to around 100 to 105 degrees. * WHERE...Portions of southeast Kansas and central, east central, south central, southwest, and west central Missouri. * WHEN...Until 8 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
Moderate
Likely
Expected
September 19th, 2026 12:19:00 pm CDT
September 19th, 2026 12:19:00 pm CDT
September 19th, 2026 08:00:00 pm CDT
Heat Advisory
Jefferson; Wayne; Edwards; Wabash; Perry; Franklin; Hamilton; White; Jackson; Williamson; Saline; Gallatin; Union; Johnson; Pope; Hardin; Alexander; Pulaski; Massac; Gibson; Pike; Posey; Vanderburgh; Warrick; Spencer; Fulton; Hickman; Carlisle; Ballard; McCracken; Graves; Livingston; Marshall; Calloway; Crittenden; Lyon; Trigg; Caldwell; Union; Webster; Hopkins; Christian; Henderson; Daviess; McLean; Muhlenberg; Todd; Perry; Bollinger; Cape Girardeau; Wayne; Carter; Ripley; Butler; Stoddard; Scott; Mississippi; New Madrid
Heat Advisory issued September 19 at 10:19AM CDT until September 20 at 7:00PM CDT by NWS Paducah KY
* WHAT...Peak Heat Index values up to around 100 degrees this weekend. * WHERE...All of southern Illinois, southwest Indiana, western Kentucky, and southeast Missouri. * WHEN...Until 7 PM CDT /8 PM EDT/ Sunday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...The Heat Advisory was extended thru the weekend due to the prolonged high heat conditions that have basically been ongoing for the entirety of the past week; this continues to heighten the risk of heat-related health impacts.
Moderate
Likely
Expected
September 19th, 2026 10:19:00 am CDT
September 19th, 2026 10:19:00 am CDT
September 20th, 2026 04:15:00 am CDT
SAFETY and DATA MESSAGE
When a severe thunderstorm warning is issued, the storm may produce damaging winds, large hail, dangerous lightning, and heavy rain. In some cases, heavy rainfall produced by a severe storm can also lead to flash flooding. Do not drive vehicles through flooded areas. The water depth or fast flowing water/mud/debris from a flash flood will make road conditions unsafe. Do not rely soley on data presented here or other third-party websites - always check your official national and local weather service agency website, socials, radio and/or TV stations for making critical decisions related to weather events.
Please carefully read each posted Warning and Alert as it relates to the area(s) being affected. We may provide a wider range of issued severe weather warnings for surrounding cities and counties, so some alerts may not directly impact this location. This is done to help with preparing for severe weather that may overlap or be heading towards Mendon.
Use the Radar Maps link provided to understand the trajectory of a storm.
For more official information about severe storms and how to stay safe, visit the National Weather Service's Severe Thunderstorm Safety page. We encourage you to also monitor Excessive Rainfall Forecasts on their Weather Prediction Center website.