Alert archive / Illinois / Severe Thunderstorm Warnings in 2022
Severe Thunderstorm Warning 49, NWS Chicago, IL
NWS Chicago, IL issued this severe thunderstorm warning at Jul 4, 2022, 8:32 PM CDT for Boone County, McHenry County, Winnebago County, Illinois. It was in force for 58 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 4, 2022, 8:32 PM CDT (01:32 UTC)
- Expired
- Jul 4, 2022, 9:30 PM CDT
- In force
- 58 min
- Issued by
- NWS Chicago, IL
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Boone County, IL, McHenry County, IL, Winnebago County, IL
The radar
The Milwaukee radar (KMKX), 74 km from the middle of the area, began a volume at 01:31 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 4, 8:07 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 1.5 hours before the alert went out and 160 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
- 3635 J/kg
- Mixed-layer CIN
- -22 J/kg
- Mixed-layer LCL
- 1008 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 306 m²/s²
- 0-3 km storm-relative helicity
- 538 m²/s²
- Significant tornado parameter
- 6.2
- Supercell composite
- 38.0
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 Chicago, IL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 4, 7:43 PM CDT, 49 minutes earlier.
Area forecast discussion, Jul 4, 7:43 PM CDT, 49 minutes before
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</html>Hazardous weather outlook, Jul 4, 4:22 PM CDT, 4 hours 10 minutes before
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
422 PM CDT Mon Jul 4 2022
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-052130-
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
422 PM CDT Mon Jul 4 2022 /522 PM EDT Mon Jul 4 2022/
This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.
.DAY ONE...Tonight.
Weather hazards expected...
Elevated Thunderstorm Risk...with an associated:
Limited Tornado risk.
Limited hail risk...up to 1 inch diameter.
Limited damaging wind risk...up to 70 mph.
Elevated Flooding Risk.
Limited Excessive Heat Risk.
DISCUSSION...
Scattered thunderstorms will continue late this afternoon into
early this evening. These storms will be capable of producing
damaging winds, large hail and heavy rain that may result in
localized flooding.
Additional scattered thunderstorms are possible later this
evening into the early morning hours. These storms may also be
severe and produce heavy rain with localized flooding.
.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.
Tuesday...
Limited Severe Thunderstorm Risk.
Limited Flooding Risk.
Elevated Excessive Heat Risk.
Wednesday...
Limited Severe Thunderstorm Risk.
Elevated Flooding Risk.
Limited Excessive Heat Risk.
Thursday...
Elevated Thunderstorm Risk.
Limited Excessive Heat Risk.
Friday...
Limited Thunderstorm Risk.
DISCUSSION:
Dangerous heat indices of 105 to 110 degrees are likely Tuesday
afternoon.
Multiple rounds of showers and thunderstorms are possible Tuesday
through Friday. Any one of these bouts of thunderstorms could
result in a risk of severe thunderstorms and the potential for
localized flash flooding.
.SPOTTER INFORMATION STATEMENT...
Spotters will be needed through tonight.
GENERAL STORM MOTION OF THE DAY:
Moving toward the east southeast at 20 to 30 mph.
LMZ740>745-052130-
Winthrop Harbor to Wilmette Harbor IL-
Wilmette Harbor to Northerly Island IL-
Northerly Island to Calumet Harbor IL-
Calumet Harbor IL to Gary IN-Gary to Burns Harbor IN-
Burns Harbor to Michigan City IN-
422 PM CDT Mon Jul 4 2022
This Hazardous Weather Outlook is for portions of the Illinois
nearshore waters of Lake Michigan and the Indiana nearshore
waters of Lake Michigan.
.DAY ONE...Tonight.
Weather hazards expected...
Elevated Thunderstorm Risk...with an associated:
Limited Waterspout Risk.
Limited hail risk...up to 1 inch diameter.
Limited thunderstorm wind gust risk...up to 60 knots.
.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.
Tuesday and Wednesday...
Limited Severe Thunderstorm Risk.
Thursday and Friday...
Limited Thunderstorm Risk.
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www.youtube.com/nwschicagoIn the hours before
Local storm report, Jul 4, 5:44 PM CDT, 2 hours 48 minutes before
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</html>Local storm report, Jul 4, 5:47 PM CDT, 2 hours 45 minutes before
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</html>Local storm report, Jul 4, 5:55 PM CDT, 2 hours 37 minutes before
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</html>Local storm report, Jul 4, 6:39 PM CDT, 1 hour 53 minutes before
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</html>Local storm report, Jul 4, 7:11 PM CDT, 1 hour 21 minutes before
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</html>Local storm report, Jul 4, 7:13 PM CDT, 1 hour 19 minutes before
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</html>The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 4, 9:28 PM CDT | Special Weather Statement | LOT | Boone, McHenry | 92 min |
| Jul 4, 9:30 PM CDT | Severe Thunderstorm Warning | LOT | Boone, Winnebago | 45 min |
| Jul 4, 9:57 PM CDT | Special Weather Statement | LOT | Winnebago | 93 min |
| Jul 4, 10:05 PM CDT | Severe Thunderstorm Warning | LOT | Boone, McHenry | 35 min |
| Jul 4, 10:15 PM CDT | Special Marine Warning | LOT | 75 min | |
| Jul 4, 10:55 PM CDT | Severe Thunderstorm Warning | LOT | Cook, Kane, Lake, McHenry | 50 min |
| Jul 4, 11:04 PM CDT | Severe Thunderstorm Warning | LOT | Boone, Winnebago | 56 min |
| Jul 4, 11:16 PM CDT | Severe Thunderstorm Warning | LOT | Cook, Lake | 59 min |
| Jul 4, 11:21 PM CDT | Special Marine Warning | LOT | 3 hr | |
| Jul 4, 11:22 PM CDT | Severe Thunderstorm Warning | LOT | Kane, McHenry | 68 min |
| Jul 4, 11:31 PM CDT | Areal Flood Advisory | LOT | Boone, Cook, DeKalb, Kane, Lake, McHenry and 1 more | 6 hr |
| Jul 4, 11:51 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage | 69 min |
| Jul 4, 11:56 PM CDT | Flash Flood Warning | LOT | Boone, Winnebago | 5 hr |
| Jul 4, 11:58 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage, Kane, Lake | 62 min |
| Jul 5, 12:14 AM CDT | Severe Thunderstorm Warning | LOT | Cook | 38 min |
| Jul 5, 12:15 AM CDT | Flash Flood Warning | LOT | Boone, Cook, DeKalb, Kane, Lake, McHenry | 5 hr |
| Jul 5, 12:21 AM CDT | Flash Flood Warning | LOT | Cook, DuPage | 5 hr |
| Jul 5, 12:36 AM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage, Will | 69 min |
| Jul 5, 12:51 AM CDT | Special Marine Warning | LOT | 84 min | |
| Jul 5, 3:54 AM CDT | Flood Watch | LOT | Boone, Cook, DuPage, Kane, Lake, McHenry and 2 more | 23 hr |
| Jul 5, 11:25 AM CDT | Marine Dense Fog Advisory | LOT | 5 hr | |
| Jul 5, 3:51 PM CDT | Special Weather Statement | LOT | McHenry | 24 min |
| Jul 5, 5:29 PM CDT | Special Weather Statement | LOT | McHenry | 46 min |
| Jul 5, 5:37 PM CDT | Severe Thunderstorm Warning | LOT | Winnebago | 68 min |
| Jul 5, 5:53 PM CDT | Severe Thunderstorm Warning | LOT | McHenry | 67 min |
| Jul 5, 5:56 PM CDT | Tornado Warning | LOT | McHenry | 16 min |
| Jul 5, 6:34 PM CDT | Areal Flood Advisory | LOT | McHenry | 36 min |
| Jul 5, 6:43 PM CDT | Severe Thunderstorm Warning | LOT | Boone, McHenry | 77 min |
| Jul 5, 1:12 AM CDT | Special Weather Statement | LOT | Lake | 63 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 2022Every severe thunderstorm warning in 2022
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.