Alert archive / Illinois / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 192, NWS Lincoln, IL

July 17, 2023Christian County, Morgan County, Sangamon County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Jul 17, 2023, 6:15 PM CDT for Christian County, Morgan County, Sangamon County, Illinois. It was in force for 30 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 17, 2023, 6:15 PM CDT (23:15 UTC)
Expired
Jul 17, 2023, 6:45 PM CDT
In force
30 min
Issued by
NWS Lincoln, IL
Area
Storm-based polygon
Hail
1.5 in
Wind
60.0 mph

Counties Christian County, IL, Morgan County, IL, Sangamon County, IL

The radar

The Lincoln radar (KILX), 62 km from the middle of the area, began a volume at 23:18 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.

IssuedProductOfficeLasted
Jul 17, 3:31 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 11.3 hours before the alert went out and 109 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.

Skew-T log-pSkew-T log-p diagram, Lincoln, IL at 12:00Z on 2023-07-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 871 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 12:00Z on 2023-07-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
871 J/kg
Mixed-layer CIN
-46 J/kg
Mixed-layer LCL
917 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
103 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

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 Lincoln, IL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 17, 3:17 PM CDT, 2 hours 58 minutes earlier.

Area forecast discussion, Jul 17, 3:17 PM CDT, 2 hours 58 minutes before
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Hazardous weather outlook, Jul 17, 3:38 PM CDT, 2 hours 37 minutes before
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In the hours before

Local storm report, Jul 17, 3:17 PM CDT, 2 hours 58 minutes before
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Special weather statement, Jul 17, 3:32 PM CDT, 2 hours 43 minutes before
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Special weather statement, Jul 17, 3:43 PM CDT, 2 hours 32 minutes before
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Special weather statement, Jul 17, 4:03 PM CDT, 2 hours 12 minutes before
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Special weather statement, Jul 17, 4:24 PM CDT, 1 hour 51 minutes before
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      <h1 id="headline">This service is currently unavailable.</h1>
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      <p id="message2">
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Special weather statement, Jul 17, 6:10 PM CDT, 5 minutes before
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The office that day

Everything else NWS Lincoln, IL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 17, 1:36 PM CDTSevere Thunderstorm WarningILXMorgan, Scott24 min
Jul 17, 2:31 PM CDTSpecial Weather StatementILXVermilion29 min
Jul 17, 2:57 PM CDTSevere Thunderstorm WarningILXVermilion33 min
Jul 17, 3:00 PM CDTSpecial Weather StatementILXChristian30 min
Jul 17, 3:15 PM CDTSpecial Weather StatementILXShelby30 min
Jul 17, 3:32 PM CDTSpecial Weather StatementILXVermilion28 min
Jul 17, 3:43 PM CDTSpecial Weather StatementILXShelby32 min
Jul 17, 4:03 PM CDTSpecial Weather StatementILXVermilion27 min
Jul 17, 4:24 PM CDTSpecial Weather StatementILXVermilion36 min
Jul 17, 4:41 PM CDTSevere Thunderstorm WarningILXVermilion34 min
Jul 17, 6:10 PM CDTSpecial Weather StatementILXSangamon35 min
Jul 17, 6:41 PM CDTSevere Thunderstorm WarningILXChristian, Sangamon34 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2023Every severe thunderstorm warning in 2023

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.