Alert archive / Illinois / Wind Advisories in 2023

Wind Advisory 8, NWS Chicago, IL

May 7, 20237 counties in Illinois

NWS Chicago, IL issued this wind advisory at May 7, 2023, 10:36 PM CDT for 7 counties in Illinois. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued: May 7, 2023, 10:36 PM CDT (03:36 UTC)
Expired: May 8, 2023, 1:00 AM CDT
In force: 2 hr
Issued by: NWS Chicago, IL

Counties DeKalb County, IL, Grundy County, IL, Kane County, IL, Kendall County, IL, LaSalle County, IL, Lee County, IL, Ogle County, IL

The radar

The Chicago radar (KLOT), 60 km from the middle of the area, began a volume at 03:36 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, 3.6 hours before the alert went out and 172 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: 2003 J/kg
Mixed-layer CIN: -80 J/kg
Mixed-layer LCL: 822 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: -67 m²/s²
0-3 km storm-relative helicity: -65 m²/s²
Significant tornado parameter: -0.6
Supercell composite: -3.3

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 May 7, 6:51 PM CDT, 3 hours 45 minutes earlier.

Area forecast discussion, May 7, 6:51 PM CDT, 3 hours 45 minutes before

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Hazardous weather outlook, May 7, 2:54 PM CDT, 7 hours 42 minutes before

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
254 PM CDT Sun May 7 2023

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-082000-
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-
254 PM CDT Sun May 7 2023 /354 PM EDT Sun May 7 2023/

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 mainly near Interstate 80 with threats of:
     Limited Hail Risk...up to ping pong ball size.
     Limited Damaging Wind Risk...up to 65 mph.
  Elevated Flooding Risk.
  Limited Fog Risk.

DISCUSSION...

Scattered thunderstorms may develop near Interstate 80 after 7 PM.
While it is not a guarantee storms will form, those that do will
likely produce damaging hail, damaging winds, and torrential
downpours. Additional thunderstorms may move into central
Illinois after midnight.

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

Monday...
  Elevated Thunderstorm Risk, mainly south of Interstate 80.
Thursday through Saturday...
  Limited Thunderstorm Risk.

DISCUSSION...

Additional thunderstorm chances exist Monday afternoon and
evening, mainly for central Illinois. The strongest storms may
produce damaging wind gusts and hail in addition to locally heavy
rainfall which could result in localized instances of flooding.

.SPOTTER INFORMATION STATEMENT...

  Spotters may be needed near Interstate 80 this evening.

GENERAL STORM MOTION OF THE DAY:

  Moving toward the east at 30 to 35 mph.

LMZ740>745-082000-
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-
254 PM CDT Sun May 7 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...Tonight.

Weather hazards expected...

  Elevated Thunderstorm Risk...with an associated:
     Limited hail risk...up to ping pong ball size.
  Limited Fog Risk.

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

Thursday through Saturday...
  Limited Thunderstorm Risk.

Borchardt

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In the hours before

Local storm report, May 7, 9:08 PM CDT, 1 hour 28 minutes before

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Local storm report, May 7, 9:09 PM CDT, 1 hour 27 minutes before

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Local storm report, May 7, 9:38 PM CDT, 58 minutes before

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Local storm report, May 7, 9:40 PM CDT, 56 minutes before

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Local storm report, May 7, 9:42 PM CDT, 54 minutes before

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Local storm report, May 7, 9:44 PM CDT, 52 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
May 7, 7:23 PM CDT	Flash Flood Warning	LOT	Grundy, Kankakee, Kendall, Will	5 hr
May 7, 7:32 PM CDT	Flash Flood Warning	LOT	DeKalb, LaSalle, Lee	5 hr
May 7, 8:00 PM CDT	Special Weather Statement	LOT	Grundy, Will	30 min
May 7, 8:29 PM CDT	Severe Thunderstorm Warning	LOT	Grundy, Will	46 min
May 7, 8:42 PM CDT	Severe Thunderstorm Warning	LOT	Grundy, LaSalle, Livingston	78 min
May 7, 8:47 PM CDT	Dust Storm Warning	LOT	Grundy, LaSalle, Livingston	58 min
May 7, 9:06 PM CDT	Dust Storm Warning	LOT	Ford, Iroquois, Kankakee	84 min
May 7, 9:16 PM CDT	Severe Thunderstorm Warning	LOT	Ford, Grundy, Iroquois, Kankakee, Livingston	89 min
May 7, 10:43 PM CDT	Severe Thunderstorm Warning	LOT	Ford, Iroquois	15 min
May 8, 5:34 AM CDT	Special Weather Statement	LOT	Ford	41 min
May 7, 7:52 PM CDT	Areal Flood Advisory	LOT	Jasper, Lake, Newton	3 hr
May 7, 9:35 PM CDT	Severe Thunderstorm Warning	LOT	Jasper, Newton	45 min

Nearby

Wind Advisories in Illinois, 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.