Live · updated 1 min ago
St. Peters weather alerts
No active National Weather Service alerts for St. Peters, Missouri right now. The most recent was an Extreme Heat Warning that ended Sep 5, 8:00 PM.
13 in the last 30 days 13 in 12 months (since Aug 30) most common: Extreme Heat Warning Get alerts on your phone →
Active alerts for St. Charles County
NWS issues alerts by county; St. Peters is in St. Charles County. Refreshed every few minutes; times in CDT.
All clear in St. Charles County
No warnings, watches or advisories are in effect. See what is active across the country, or check a neighbouring county below.
Get St. Peters alerts on your phone before you think to look them up
Forecast Bar watches the official alert feeds around the clock, NWS in the United States and Environment Canada in Canada, and pushes every warning, watch and advisory for your saved locations the moment it is issued. This page is the same data, a few minutes later.
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Where
St. Charles County on the map
Alert polygons are NWS's own. Forecast Bar's radar shows the same warnings over live precipitation, with future radar and lightning. See the radar.
Last 30 days
Recent alerts for St. Charles County
| Alert | Issued | Ended | Issued by |
|---|---|---|---|
| Extreme Heat Warning | Sep 5, 12:29 PM | Sep 5, 8:00 PM | St Louis MO |
| Extreme Heat Warning | Sep 5, 2:29 AM | Sep 5, 8:00 PM | St Louis MO |
| Extreme Heat Warning | Sep 4, 2:49 PM | Sep 5, 8:00 PM | St Louis MO |
| Extreme Heat Warning | Sep 4, 3:26 AM | Sep 5, 8:00 PM | St Louis MO |
| Extreme Heat Warning | Sep 3, 2:45 PM | Sep 5, 8:00 PM | St Louis MO |
| Extreme Heat Warning | Sep 3, 12:12 AM | Sep 5, 8:00 PM | St Louis MO |
| Heat Advisory | Sep 2, 2:24 PM | Cancelled Sep 3, 12:15 AM | St Louis MO |
| Heat Advisory | Sep 2, 2:34 AM | Sep 5, 8:00 PM | St Louis MO |
| Heat Advisory | Sep 1, 12:55 PM | Sep 5, 8:00 PM | St Louis MO |
| Heat Advisory | Sep 1, 3:22 AM | Sep 4, 8:00 PM | St Louis MO |
| Heat Advisory | Aug 31, 2:29 PM | Sep 4, 8:00 PM | St Louis MO |
| Heat Advisory | Aug 30, 11:03 PM | Cancelled Aug 31, 2:31 PM | St Louis MO |
| Extreme Heat Watch | Aug 30, 12:27 PM | Cancelled Aug 30, 11:04 PM | St Louis MO |
Pattern
What St. Charles County gets alerted for
Every alert that named St. Charles County in the last 12 months, by type. Records begin August 30, 2026, so this fills in over the year.
Plain English
What these alerts mean
A warning means the hazard is happening or about to; a watch means conditions favour it; an advisory is a lesser hazard still worth planning around.
Extremely dangerous heat. Avoid strenuous activity, stay in cool spaces and never leave people or pets in a vehicle.
Heat index values high enough to cause heat illness with prolonged exposure. Drink water, stay in air conditioning and check on neighbours.
Extremely dangerous heat is possible. Make plans to stay cool and hydrated.
Nearby
Alerts near St. Peters
Cities
Neighbouring counties in Missouri
Questions
About St. Peters alerts
How do I get St. Peters weather alerts on my iPhone?
Install Forecast Bar, add St. Peters as a location, and turn on severe weather alerts. Every NWS warning, watch and advisory for St. Charles County then arrives as a push notification at the moment of issue, with Critical Alerts available for the most dangerous warnings. Forecast Bar also runs on iPad, Apple Watch, Mac and Apple TV.
Where do these alerts come from?
From the National Weather Service alert feed (api.weather.gov). NWS issues alerts by county and by forecast zone; this page lists every product that names St. Charles County, the county St. Peters sits in. Forecast Bar checks the feed continuously and this page refreshes within a few minutes of a change.
What is the difference between a watch, a warning and an advisory?
A warning means the hazard is occurring, imminent or very likely: act now. A watch means conditions are favourable for it to develop: prepare and stay informed. An advisory covers a hazard that is less serious than a warning but can still cause real inconvenience or danger if you are not ready for it.
Can I get this data as JSON?
Yes. /weather-alerts/mo/st-peters.json returns the active alerts, the last 30 days and the 12-month counts for St. Peters, refreshed every minute. Please cache responses and credit National Weather Service as the source.
Never find out about a St. Charles County alert from this page again
Add St. Peters in Forecast Bar and every NWS warning, watch and advisory arrives as a push notification the moment it is issued, on iPhone, iPad, Apple Watch, Mac and Apple TV.
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