Alert archive / Illinois / Severe Thunderstorm Warnings in 2024
Severe Thunderstorm Warning 345, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Jul 31, 2024, 6:12 AM CDT for Adams County, Brown County, Illinois. It was in force for 48 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
- Jul 31, 2024, 6:12 AM CDT (11:12 UTC)
- Expired
- Jul 31, 2024, 7:00 AM CDT
- In force
- 48 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 0.88 in
- Wind
- 60.0 mph
Counties Adams County, IL, Brown County, IL
The radar
The Lincoln radar (KILX), 140 km from the middle of the area, began a volume at 11:12 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 31, 3:46 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 31, 5:50 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 11.2 hours before the alert went out and 187 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
- 111 J/kg
- Mixed-layer CIN
- -476 J/kg
- Mixed-layer LCL
- 1513 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 158 m²/s²
- 0-3 km storm-relative helicity
- 187 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Jul 31, 3:12 AM CDT, 3 hours earlier.
Area forecast discussion, Jul 31, 3:12 AM CDT, 3 hours before
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</html>Hazardous weather outlook, Jul 31, 3:26 AM CDT, 2 hours 46 minutes before
Hazardous Weather Outlook National Weather Service St Louis MO 326 AM CDT Wed Jul 31 2024 ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027- 034>036-041-042-047>052-059>065-072>075-084-085-099-010830- 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- 326 AM CDT Wed Jul 31 2024 This Hazardous Weather Outlook is for portions of eastern and central Missouri as well as west central and southwest Illinois. .DAY ONE...Today and tonight. Multiple rounds of thunderstorms are possible through tonight. Strong to severe storms will be primarily capable of isolated to scattered damaging wind gusts. Dangerous heat and humidity is expected across the area today. See the Excessive Heat Warning and Heat Advisory for additional information. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Dangerous heat and humidity is expected across the area Thursday. See the Excessive Heat Warning and Heat Advisory for additional information. There is a chance of thunderstorms across portions of the area at times Thursday and Friday. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report wind damage to NWS St. Louis. Elmore
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 5:35 AM CDT | Severe Thunderstorm Warning | LSX | Lewis | 40 min |
| Jul 31, 1:12 PM CDT | Severe Thunderstorm Warning | LSX | Lewis | 33 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 2024Every severe thunderstorm warning in 2024
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.