Saint Louis County, MO Weather Alerts
Every National Weather Service alert issued for Saint Louis County, Missouri, pushed to your phone within moments — county code MOC189, forecast zone 2 zones (MOZ063, MOZ065). Free with StormCast.
Download on Google PlayHow the NWS identifies Saint Louis County
These are the identifiers the National Weather Service uses when it issues a warning here. StormCast watches MOC189 directly rather than matching on place names, which is why an alert arrives whether you are in Allenton or anywhere else in the county.
NWS County Code
MOC189
Forecast Zones
2 zones (MOZ063, MOZ065)
Forecast Office
St. Charles (LSX)
Radar Station
KLSX
Towns covered in Saint Louis County
An NWS alert for Saint Louis County applies to all 15 of these communities. You do not need a separate alert for each one.
River gauges in and around Saint Louis County
StormCast tracks 4 gauges near Saint Louis County. Set a flood-stage alert on any of them to get notified before the water reaches you.
Current conditions
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Alert types issued for Saint Louis County
Tornado
Tornado Warning, Tornado Watch, Tornado Emergency and Severe Thunderstorm Warning.
How tornado alerts work →Flooding
Flash Flood Warning, Flood Watch, Flood Advisory and River Flood Warning.
How flood alerts work →Winter
Winter Storm Warning, Ice Storm Warning, Blizzard Warning and Winter Weather Advisory.
Winter warnings explained →Fire Weather
Red Flag Warning and Fire Weather Watch when conditions favor rapid fire spread.
Fire weather alerts →Heat & Cold
Excessive Heat Warning, Heat Advisory, Freeze Warning and Frost Advisory.
Frost & freeze alerts →Saint Louis County weather alert questions
Which NWS forecast zone is Saint Louis County in?
Saint Louis County, Missouri is NWS county code MOC189 and spans 2 forecast zones (MOZ063, MOZ065). Alerts for it are issued by the St. Charles (LSX) Weather Forecast Office, and the nearest NEXRAD radar is KLSX.
Which towns in Saint Louis County are covered?
All of them. NWS alerts are issued at the county and zone level, so a warning for Saint Louis County covers every community inside it, including Allenton, Ballwin, Bridgeton, Chesterfield, Earth City, Eureka, Fenton, Florissant, Glencoe, Grover, Hazelwood, Maryland Heights, Saint Ann, Saint Louis and Valley Park.
Are there river gauges in Saint Louis County?
Yes — StormCast monitors 4 river gauges in and around Saint Louis County, including Meramec River at Valley Park, Meramec River at Fenton, Missouri River at St. Charles. You can set a flood-stage alert on any of them and get a push notification when the water rises.
How fast are alerts for Saint Louis County delivered?
StormCast polls the NWS alert feed every 30 seconds. When a warning is issued for MOC189, the push notification goes out within moments — even with your screen off.