Alert archive / Illinois / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 143, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at May 16, 2026, 12:57 PM CDT for Adams County, Illinois. It was in force for 14 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- May 16, 2026, 12:57 PM CDT (17:57 UTC)
- Expired
- May 16, 2026, 1:11 PM CDT
- In force
- 14 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Adams County, IL
The radar
The St Louis radar (KLSX), 150 km from the middle of the area, began a volume at 17:59 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.
The nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 6.0 hours before the alert went out and 221 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 351 J/kg
- Mixed-layer CIN
- -69 J/kg
- Mixed-layer LCL
- 1001 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- -79 m²/s²
- 0-3 km storm-relative helicity
- 2 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.3
What forecasters said that day
The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at May 16, 12:20 PM CDT, 37 minutes earlier.
Area forecast discussion, May 16, 12:20 PM CDT, 37 minutes before
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</html>Hazardous weather outlook, May 16, 5:55 AM CDT, 7 hours 2 minutes before
Hazardous Weather Outlook National Weather Service St Louis MO 555 AM CDT Sat May 16 2026 ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027- 034>036-041-042-047>052-059>065-072>075-084-085-099-171100- Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Clinton IL- Marion IL-Washington IL-Randolph IL-Adams IL-Brown IL-Pike IL- Calhoun IL-Jersey IL-Madison IL-Saint Clair IL-Monroe IL-Knox MO- Lewis MO-Shelby MO-Marion MO-Monroe MO-Ralls MO-Pike MO-Boone MO- Audrain MO-Moniteau MO-Cole MO-Osage MO-Callaway MO-Montgomery MO- Lincoln MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO- Saint Louis MO-Saint Louis City MO-Jefferson MO-Crawford MO- Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO- Madison MO-Reynolds MO- 555 AM CDT Sat May 16 2026 This Hazardous Weather Outlook is for portions of eastern and central Missouri as well as west central and southwest Illinois. .DAYS ONE THROUGH SEVEN...Today through Friday. More detailed information can be accessed at: https://www.weather.gov/media/lsx/DssPacket.pdf The Area Forecast Discussion is available at: https://forecast.weather.gov/ product.php?issuedby=LSX&product=AFD&site=lsx .KEY MESSAGES... - Showers and scattered thunderstorms are expected this morning with coverage forecast to gradually fade by this afternoon. The strongest storms could produce hail up to 1" and damaging wind gusts. - Thunderstorms are possible (20-30%) this afternoon and evening. The main risk is large hail with a lower potential for damaging winds. - Additional thunderstorm chances return early this week with a more widespread severe weather threat possible along a slow moving cold front Monday night into Tuesday. NOTE: Starting May 29, 2026, this outlook product will be discontinued. Please see the above products for more detailed forecast information. WFO LSX
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 16, 10:02 AM CDT | Areal Flood Advisory | LSX | Calhoun | 3 hr |
| May 16, 12:10 PM CDT | Areal Flood Advisory | LSX | Pike | 3 hr |
| May 16, 3:20 PM CDT | Severe Thunderstorm Warning | LSX | Saint Clair | 40 min |
| May 16, 3:30 PM CDT | Severe Thunderstorm Warning | LSX | Clinton | 60 min |
| May 16, 3:36 PM CDT | Severe Thunderstorm Warning | LSX | Marion | 39 min |
| May 16, 3:56 PM CDT | Tornado Warning | LSX | Clinton | 15 min |
| May 16, 4:03 PM CDT | Severe Thunderstorm Warning | LSX | Fayette, Marion | 57 min |
| May 16, 4:17 PM CDT | Tornado Warning | LSX | Marion | 43 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 2026Every severe thunderstorm warning in 2026
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.