Alert archive / Indiana / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 101, NWS Chicago, IL

August 7, 2022Kankakee County, Illinois; Lake County, Newton County, Indiana

NWS Chicago, IL issued this severe thunderstorm warning at Aug 7, 2022, 12:32 PM CDT for Kankakee County, Illinois; Lake County, Newton County, Indiana. It was in force for 43 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
Aug 7, 2022, 12:32 PM CDT (17:32 UTC)
Expired
Aug 7, 2022, 1:15 PM CDT
In force
43 min
Issued by
NWS Chicago, IL
Area
Storm-based polygon
Tornado
Possible
Hail
0.75 in
Wind
60.0 mph

Counties Kankakee County, IL, Lake County, IN, Newton County, IN

The radar

The Chicago radar (KLOT), 65 km from the middle of the area, began a volume at 17:33 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 12:00Z, 5.5 hours before the alert went out and 146 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 2022-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1093 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 2022-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 square meters per square second.1939Sfc1 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
1093 J/kg
Mixed-layer CIN
-79 J/kg
Mixed-layer LCL
1041 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
87 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 Chicago, IL wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 7, 12:20 PM CDT, 12 minutes earlier.

Area forecast discussion, Aug 7, 12:20 PM CDT, 12 minutes before
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Hazardous weather outlook, Aug 7, 11:40 AM CDT, 52 minutes before
Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
1140 AM CDT Sun Aug 7 2022

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-081645-
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-
1140 AM CDT Sun Aug 7 2022 /1240 PM EDT Sun Aug 7 2022/

This Hazardous Weather Outlook is for portions of North Central
Illinois...Northeast Illinois and Northwest Indiana.

.DAY ONE...This Afternoon and Tonight.

Weather hazards expected...

  Elevated Thunderstorm Risk.
  Significant Flooding Risk.

DISCUSSION...

Widespread rain and embedded thunderstorms will ease in coverage
early this afternoon. Scattered showers and thunderstorms are
expected the remainder of the afternoon into early evening,
before potentially an increase in coverage again for the rest
of tonight. Thunderstorms will be capable of producing torrential
rainfall, which could result in flash flooding.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Monday...
  Elevated Flooding Risk in the morning.
  Limited Thunderstorm Risk.
Tuesday...
  High Swim Risk.

.SPOTTER INFORMATION STATEMENT...

  Spotter activation will not be necessary through tonight.

GENERAL STORM MOTION OF THE DAY:

  Moving toward east or southeast at 15 to 25 mph.

LMZ740>745-081645-
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-
1140 AM CDT Sun Aug 7 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...This Afternoon and Tonight.

Weather hazards expected...

  Limited Thunderstorm Risk.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Monday...
  Limited Thunderstorm Risk.
Monday night and Tuesday...
  Hazardous conditions for small craft are likely.

MTF

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In the hours before

Local storm report, Aug 7, 8:53 AM CDT, 3 hours 39 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
853 AM CDT SUN AUG 7 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0845 AM     HEAVY RAIN       3 NW MACHESNEY PARK     42.38N 89.09W
08/07/2022  M3.40 INCH       WINNEBAGO          IL   MESONET

            STORM TOTAL PRECIP SINCE 12AM AND STILL
            RAINING. VIA PERSONAL WEATHER STATION.

&&

PETR
Local storm report, Aug 7, 9:13 AM CDT, 3 hours 19 minutes before
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Local storm report, Aug 7, 9:19 AM CDT, 3 hours 13 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 7, 2:25 AM CDTSpecial Marine WarningLOT2 hr
Aug 7, 2:30 AM CDTSpecial Weather StatementLOTMcHenry45 min
Aug 7, 3:51 AM CDTAreal Flood AdvisoryLOTOgle, Winnebago3 hr
Aug 7, 5:02 AM CDTFlood WatchLOTBoone, Cook, DeKalb, DuPage, Kane, Lake and 4 more29 hr
Aug 7, 6:33 AM CDTAreal Flood AdvisoryLOTBoone, Lee, Ogle, Winnebago4 hr
Aug 7, 9:25 AM CDTAreal Flood AdvisoryLOTDeKalb, LaSalle95 min
Aug 7, 10:59 AM CDTAreal Flood AdvisoryLOTDeKalb, Grundy, Kendall, LaSalle, Lee, Ogle3 hr
Aug 7, 11:23 AM CDTAreal Flood AdvisoryLOTCook, Will2 hr
Aug 7, 11:54 AM CDTFlash Flood WarningLOTCook, Will3 hr
Aug 7, 3:37 PM CDTBeach Hazards StatementLOTCook, Lake48 hr
Aug 7, 3:41 PM CDTSmall Craft AdvisoryLOT42 hr
Aug 7, 12:53 PM CDTSevere Thunderstorm WarningLOTJasper, Porter51 min

Nearby

Severe Thunderstorm Warnings in Indiana, 2022Severe 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.