Severe Thunderstorm Warning
NWS St Louis MO ยท US
Updated
This event was updated at .
Details
Severe Thunderstorm Warning Remains In Effect Until 1130 PM CDT For Northwestern Monroe County In Southwestern Illinois
- Event
- Severe Thunderstorm Warning
- Issued
- Onset
- Message expires
- Expected end
- Category
- Meteorological
- Urgency
- Immediate
- Severity
- Severe
- Certainty
- Observed
- Response
- Shelter
Description
Overview
At 1116 PM CDT, a severe thunderstorm was located near Valmeyer, or near Waterloo, moving northeast at 25 mph.
Hazard
60 mph wind gusts and quarter size hail.
Source
Radar indicated.
Impacts
Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees. Locations impacted include... Harrisonville, Chalfin Bridge, Valmeyer, Monroe City, Madonnaville, Fountain, Maeystown, Foster Pond, Wartburg, Burksville, New Hanover, Waterloo and Columbia. This includes the following State Parks... Illinois Caverns State Natural Area.
Instructions
Seek shelter inside a well-built structure and stay away from windows. This storm is capable of producing damaging winds and large hail.
Affected areas
- Monroe County, IL
Public contact
- Issuer
- NWS St Louis MO
- Website
- http://www.weather.gov
Message record
- Received
- Issue to receipt
- ~54s
- CAP status
- Actual
- CAP message type
- Update
- Lifecycle
- Updated
- Source
- NWWS-OI
- Feed
- NWWS
- Recovered
- No
CAP routing and identity
- ULID
- 01M312WQ95V5M9A6VY8PQJFDWV
- Identifier
- urn:oid:2.49.0.1.840.0.5ff9edc7abaa7456a09734e73f0adc5308777898.002.1
- Sender
- w-nws.webmaster@noaa.gov
- Scope
- Public
- CAP source
- 211803 v2.3.0
- Handling codes
- IPAWSv1.0
- Issuing office
- NWS St Louis MO
- AWIPS ID
- CAPLSX
- NWWS sequence
- nwws_processor.6304
- WMO heading
- XOUS53
- WMO data type
- CAP alert message XML (XO)
- WMO geography
- United States (US)
- WMO bulletin number
- 53
References
- Sender
- w-nws.webmaster@noaa.gov
- Sent
Event codes
| Name | Value |
|---|---|
| SAME | SVS |
| NationalWeatherService | SVW |
Parameters
| Name | Value |
|---|---|
| AWIPSidentifier | SVSLSX |
| WMOidentifier | WWUS53 KLSX 210416 |
| NWSheadline | SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1130 PM CDT FOR NORTHWESTERN MONROE COUNTY IN SOUTHWESTERN ILLINOIS |
| eventMotionDescription | 2026-09-21T03:47:00-00:00...storm...247DEG...20KT...38.25,-90.42 |
| windThreat | RADAR INDICATED |
| maxWindGust | 60 MPH |
| hailThreat | RADAR INDICATED |
| maxHailSize | 1.00 |
| BLOCKCHANNEL | EAS |
| BLOCKCHANNEL | NWEM |
| EAS-ORG | WXR |
| VTEC | /O.CON.KLSX.SV.W.0258.000000T0000Z-260921T0430Z/ |
| eventEndingTime | 2026-09-20T23:30:00-05:00 |
| BLOCKCHANNEL | CMAS |
Locations
Location data
- Monroe County, IL
| Name | Value |
|---|---|
| SAME | 017133 |
| UGC | ILC133 |
- Polygons
- 38.4,-90.32 38.42,-90.3 38.46,-90.18 38.45,-90.18 38.21,-90.11 38.2,-90.35 38.21,-90.35 38.22,-90.36 38.26,-90.37 38.34,-90.37 38.38,-90.35 38.39,-90.33 38.4,-90.32