Alert archive / Illinois / Wind Advisories in 2023

Wind Advisory 7, NWS Chicago, IL

April 20, 20235 counties in Illinois; 5 counties in Indiana

NWS Chicago, IL issued this wind advisory at Apr 20, 2023, 3:53 AM CDT for 5 counties in Illinois; 5 counties in Indiana. It took effect at Apr 20, 2023, 11:00 AM CDT. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: Apr 20, 2023, 3:53 AM CDT (08:53 UTC)
In effect from: Apr 20, 2023, 11:00 AM CDT
Expired: Apr 20, 2023, 6:00 PM CDT
In force: 7 hr
Issued by: NWS Chicago, IL

Counties Ford County, IL, Iroquois County, IL, Kankakee County, IL, Livingston County, IL, Will County, IL, Benton County, IN, Jasper County, IN, Lake County, IN, Newton County, IN, Porter County, IN

The radar

The Chicago radar (KLOT), 72 km from the middle of the area, began a volume at 08:55 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 00:00Z, 8.9 hours before the alert went out and 126 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: 8 J/kg
Mixed-layer CIN: -476 J/kg
Mixed-layer LCL: 2272 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 105 m²/s²
0-3 km storm-relative helicity: 284 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 wind advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Chicago, IL wrote its last area forecast discussion before this wind advisory went out at Apr 20, 3:26 AM CDT, 27 minutes earlier.

Area forecast discussion, Apr 20, 3:26 AM CDT, 27 minutes before

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Hazardous weather outlook, Apr 19, 9:35 PM CDT, 6 hours 18 minutes before

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In the hours before

Local storm report, Apr 19, 10:58 PM CDT, 4 hours 55 minutes before

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Special weather statement, Apr 20, 3:47 AM CDT, 6 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 19, 7:11 PM CDT	Severe Thunderstorm Warning	LOT	Kankakee	49 min
Apr 20, 3:47 AM CDT	Special Weather Statement	LOT	DeKalb, Grundy, Kendall	28 min
Apr 20, 4:04 AM CDT	Gale Warning	LOT		17 hr
Apr 20, 4:04 AM CDT	Small Craft Advisory	LOT		17 hr
Apr 20, 4:04 AM CDT	Special Weather Statement	LOT	Boone	26 min
Apr 20, 4:00 PM CDT	Severe Thunderstorm Warning	LOT	Lee, Ogle	75 min
Apr 20, 4:49 PM CDT	Special Marine Warning	LOT		56 min
Apr 20, 4:55 PM CDT	Severe Thunderstorm Warning	LOT	DeKalb, LaSalle, Lee	52 min
Apr 20, 5:02 PM CDT	Severe Thunderstorm Warning	LOT	Boone, McHenry, Winnebago	31 min
Apr 20, 5:14 PM CDT	Severe Thunderstorm Warning	LOT	DeKalb, Kane	46 min
Apr 20, 5:15 PM CDT	Severe Thunderstorm Warning	LOT	LaSalle, Livingston	60 min
Apr 20, 5:40 PM CDT	Severe Thunderstorm Warning	LOT	Cook, Kane, Lake, McHenry	50 min
Apr 20, 5:45 PM CDT	Special Marine Warning	LOT		2 hr
Apr 20, 6:06 PM CDT	Severe Thunderstorm Warning	LOT	Grundy, Kankakee, Livingston, Will	54 min
Apr 20, 6:06 PM CDT	Severe Thunderstorm Warning	LOT	DuPage	24 min
Apr 20, 6:22 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	Cook, DuPage, Lake	26 min
Apr 20, 6:28 PM CDT	Severe Thunderstorm Warning	LOT	Cook, DuPage, Will	50 min
Apr 20, 6:33 PM CDT	Special Marine Warning	LOT		117 min
Apr 20, 6:47 PM CDT	Severe Thunderstorm Warning	LOT	Kankakee, Will	43 min
Apr 19, 7:36 PM CDT	Severe Thunderstorm Warning	LOT	Lake, Newton	39 min
Apr 19, 8:15 PM CDT	Special Weather Statement	LOT	Jasper	45 min
Apr 20, 12:56 PM CDT	Special Weather Statement	LOT	Jasper	34 min

Nearby

Wind Advisories in Illinois, 2023 Wind Advisories in Indiana, 2023 Every wind advisory 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.