Alert archive / Illinois / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 63, NWS Paducah, KY

April 18, 2024Johnson County, Massac County, Pope County, Illinois

NWS Paducah, KY issued this severe thunderstorm warning at Apr 18, 2024, 5:11 PM CDT for Johnson County, Massac County, Pope County, Illinois. It was in force for 49 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: Apr 18, 2024, 5:11 PM CDT (22:11 UTC)
Expired: Apr 18, 2024, 6:00 PM CDT
In force: 49 min
Issued by: NWS Paducah, KY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Johnson County, IL, Massac County, IL, Pope County, IL

The radar

The Paducah radar (KPAH), 33 km from the middle of the area, began a volume at 22:12 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
Apr 18, 12:56 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 10.2 hours before the alert went out and 310 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1827 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 269 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Paducah, KY wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 18, 1:07 PM CDT, 4 hours 4 minutes earlier.

Area forecast discussion, Apr 18, 1:07 PM CDT, 4 hours 4 minutes before

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Hazardous weather outlook, Apr 18, 1:35 PM CDT, 3 hours 36 minutes before

Hazardous Weather Outlook
National Weather Service Paducah KY
135 PM CDT Thu Apr 18 2024

ILZ075>078-080>094-INZ081-082-085>088-KYZ001>022-MOZ076-086-087-
100-107>112-114-191000-
Jefferson-Wayne IL-Edwards-Wabash-Perry IL-Franklin-Hamilton-
White-Jackson-Williamson-Saline-Gallatin-Union-Johnson-Pope-
Hardin-Alexander-Pulaski-Massac-Gibson-Pike-Posey-Vanderburgh-
Warrick-Spencer-Fulton-Hickman-Carlisle-Ballard-McCracken-Graves-
Livingston-Marshall-Calloway-Crittenden-Lyon-Trigg-Caldwell-
Union KY-Webster-Hopkins-Christian-Henderson-Daviess-McLean-
Muhlenberg-Todd-Perry MO-Bollinger-Cape Girardeau-Wayne MO-Carter-
Ripley-Butler-Stoddard-Scott-Mississippi-New Madrid-
135 PM CDT Thu Apr 18 2024 /235 PM EDT Thu Apr 18 2024/

This Hazardous Weather Outlook is for portions of southern
Illinois, southwest Indiana, western Kentucky, and southeast
Missouri.

.DAY ONE...This Afternoon and Tonight

The threat of storms will increase to a peak this evening, with
all severe hazards in play. The greatest risk is for damaging
winds, with large hail and tornadoes also posing potential risks.
Frequent deadly lightning and locally heavy rains capable of
sporadic flooding are also potential hazards.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Lows in the upper 30s are possible this weekend, with Sunday night
perhaps the best chance for frost to develop as skies clear and
winds diminish then. These cooler temperatures and thus the
chance of frost appears greatest along and north of the Ohio
River.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is requested for our ongoing active severe
weather watch.

In the hours before

Special weather statement, Apr 18, 1:48 PM CDT, 3 hours 23 minutes before

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Local storm report, Apr 18, 3:13 PM CDT, 1 hour 58 minutes before

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Local storm report, Apr 18, 3:20 PM CDT, 1 hour 51 minutes before

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Local storm report, Apr 18, 3:51 PM CDT, 1 hour 20 minutes before

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Local storm report, Apr 18, 5:11 PM CDT, 0 minutes before

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The office that day

Everything else NWS Paducah, KY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 18, 5:06 PM CDT	Severe Thunderstorm Warning	PAH	Ballard	39 min
Apr 18, 5:34 PM CDT	Severe Thunderstorm Warning	PAH	Ballard, McCracken	41 min
Apr 18, 6:14 PM CDT	Severe Thunderstorm Warning	PAH	Livingston	31 min
Apr 18, 6:37 PM CDT	Severe Thunderstorm Warning	PAH	Calloway, Graves	38 min
Apr 18, 3:17 PM CDT	Severe Thunderstorm Warning	PAH	Jackson, Union, Williamson	28 min
Apr 18, 4:02 PM CDT	Severe Thunderstorm Warning	PAH	Franklin, Jackson, Williamson	17 min
Apr 18, 4:17 PM CDT	Severe Thunderstorm Warning	PAH	Alexander, Johnson, Pulaski, Union	28 min
Apr 18, 4:31 PM CDT	Severe Thunderstorm Warning Considerable damage threat	PAH	Johnson, Massac, Pope, Pulaski	44 min
Apr 18, 4:51 PM CDT	Severe Thunderstorm Warning	PAH	Alexander	39 min
Apr 18, 5:52 PM CDT	Severe Thunderstorm Warning	PAH	Johnson, Massac, Pope	23 min
Apr 18, 6:48 PM CDT	Severe Thunderstorm Warning Considerable damage threat	PAH	Jackson, Jefferson, Perry	57 min
Apr 18, 1:48 PM CDT	Special Weather Statement	PAH	Bollinger, Scott, Stoddard, Wayne	42 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2024 Every 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.