Alert archive / Illinois / Wind Advisories in 2023

Wind Advisory 5, NWS Chicago, IL

April 4, 202313 counties in Illinois; 5 counties in Indiana

NWS Chicago, IL issued this wind advisory at Apr 4, 2023, 3:42 PM CDT for 13 counties in Illinois; 5 counties in Indiana. It took effect at Apr 5, 2023, 7:00 AM CDT. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued: Apr 4, 2023, 3:42 PM CDT (20:42 UTC)
In effect from: Apr 5, 2023, 7:00 AM CDT
Expired: Apr 5, 2023, 4:00 PM CDT
In force: 9 hr
Issued by: NWS Chicago, IL

Counties Cook County, IL, DeKalb County, IL, DuPage County, IL, Ford County, IL, Grundy County, IL, Iroquois County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, Lake County, IL, LaSalle 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), 29 km from the middle of the area, began a volume at 20:45 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, 8.7 hours before the alert went out and 145 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: 371 J/kg
Mixed-layer CIN: -127 J/kg
Mixed-layer LCL: 481 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 320 m²/s²
0-3 km storm-relative helicity: 310 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.6

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 4, 12:59 PM CDT, 2 hours 43 minutes earlier.

Area forecast discussion, Apr 4, 12:59 PM CDT, 2 hours 43 minutes before

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Hazardous weather outlook, Apr 4, 3:15 AM CDT, 12 hours 27 minutes before

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
315 AM CDT Tue Apr 4 2023

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-050815-
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-
315 AM CDT Tue Apr 4 2023 /415 AM EDT Tue Apr 4 2023/

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

.DAY ONE...Today and Tonight.

Weather hazards expected...

  Elevated Thunderstorm Risk...with an associated:
     Elevated Tornado Risk.
     Elevated Hail Risk...up to golf ball size.
     Elevated Damaging Wind Risk...up to 70 mph.
  Limited Flooding Risk.

DISCUSSION...

Scattered thunderstorms are possible late this morning and
afternoon, mainly north of I-88. A few could be severe with a
threat for damaging hail capable of denting cars and siding.

Additional thunderstorms are possible late this afternoon and
through the evening. There remains considerable uncertainty if
storms will develop. If they do, all modes of severe weather would
be possible, mainly for locales north and west of La Salle to
Woodstock. Thunderstorms may continue into the early overnight
north of I-88 with mainly a large hail threat.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Wednesday...
  Elevated Severe Thunderstorm Risk.
  Limited Flooding Risk.
  Elevated Non Thunderstorm Wind Risk.
Sunday...
  Limited Thunderstorm Risk.

DISCUSSION...

Additional severe thunderstorms are possible on Wednesday with
damaging wind gusts and tornadoes the main threats.

Westerly non-thunderstorm winds may gust over 45 mph Wednesday,
particularly north of I-80.

.SPOTTER INFORMATION STATEMENT...

  Spotters may be needed today and tonight.

GENERAL STORM MOTION OF THE DAY:

  Moving toward the northeast at 40 mph.

LMZ740>745-050815-
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-
315 AM CDT Tue Apr 4 2023

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...Today and Tonight.

Weather hazards expected...

  Hazardous conditions for small craft.
  Elevated Thunderstorm Risk...with an associated:
     Limited hail risk...up to golf ball size.
     Limited thunderstorm wind gust risk...up to 60 knots.
  Waterspout Risk
  Limited Fog Risk.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Wednesday...
  Gale force winds and or very hazardous waves are likely.
  Elevated Severe Thunderstorm Risk.
  Waterspout Risk.
Thursday...
  Hazardous conditions for small craft are likely.
Sunday...
  Limited Thunderstorm Risk.

Carlaw

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In the hours before

Local storm report, Apr 4, 3:03 PM CDT, 39 minutes before

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Local storm report, Apr 4, 3:05 PM CDT, 37 minutes before

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Local storm report, Apr 4, 3:13 PM CDT, 29 minutes before

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Local storm report, Apr 4, 3:15 PM CDT, 27 minutes before

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Local storm report, Apr 4, 3:24 PM CDT, 18 minutes before

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Local storm report, Apr 4, 3:27 PM CDT, 15 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 4, 3:01 AM CDT	Gale Warning	LOT		40 hr
Apr 4, 4:41 AM CDT	Special Weather Statement	LOT	Livingston	34 min
Apr 4, 4:58 AM CDT	Severe Thunderstorm Warning	LOT	Livingston	47 min
Apr 4, 5:45 AM CDT	Special Weather Statement	LOT	Ford	30 min
Apr 4, 10:33 AM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	LaSalle, Lee, Ogle	72 min
Apr 4, 11:13 AM CDT	Severe Thunderstorm Warning	LOT	Ogle	62 min
Apr 4, 11:28 AM CDT	Severe Thunderstorm Warning Destructive damage threat	LOT	LaSalle	47 min
Apr 4, 11:58 AM CDT	Severe Thunderstorm Warning	LOT	Lee, Ogle	56 min
Apr 4, 12:08 PM CDT	Areal Flood Advisory	LOT	Lee, Ogle	3 hr
Apr 4, 12:13 PM CDT	Severe Thunderstorm Warning	LOT	DeKalb, Kendall, LaSalle	47 min
Apr 4, 12:35 PM CDT	Severe Thunderstorm Warning	LOT	DeKalb, Lee	25 min
Apr 4, 12:38 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	Boone, DeKalb, Kane, McHenry, Winnebago	52 min
Apr 4, 12:47 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	DeKalb, Kane, Kendall	28 min
Apr 4, 1:01 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	Cook, Kane, Lake, McHenry	89 min
Apr 4, 1:02 PM CDT	Severe Thunderstorm Warning	LOT	Boone, Winnebago	43 min
Apr 4, 1:04 PM CDT	Special Marine Warning	LOT		3 hr
Apr 4, 1:07 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	Cook, DuPage, Kane, Kendall, Will	70 min
Apr 4, 1:39 PM CDT	Areal Flood Advisory	LOT	Boone, Winnebago	117 min
Apr 4, 1:44 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	Boone, McHenry, Winnebago	46 min
Apr 4, 2:10 PM CDT	Severe Thunderstorm Warning	LOT	Lake, McHenry	50 min
Apr 4, 2:28 PM CDT	Severe Thunderstorm Warning	LOT	Cook, Lake	16 min
Apr 4, 5:46 PM CDT	River Flood Warning	LOT	Kane, Lake, McHenry	14 hr

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.