Alert archive / Indiana / Special Weather Statements in 2021

Special Weather Statement, NWS Chicago, IL

October 24, 2021Iroquois County, Illinois; Benton County, Jasper County, Newton County, Indiana

NWS Chicago, IL issued this special weather statement at Oct 24, 2021, 6:43 PM CDT for Iroquois County, Illinois; Benton County, Jasper County, Newton County, Indiana. It was in force for 77 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Oct 24, 2021, 6:43 PM CDT (23:43 UTC)
Expired: Oct 24, 2021, 8:00 PM CDT
In force: 77 min
Issued by: NWS Chicago, IL
Hail: 0.50 in
Wind: 55

Counties Iroquois County, IL, Benton County, IN, Jasper County, IN, Newton County, IN

The radar

The Chicago radar (KLOT), 96 km from the middle of the area, began a volume at 23:43 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

Davenport, (KDVN), launched 12:00Z, 11.7 hours before the alert went out and 276 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 972 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 120 m²/s²
0-3 km storm-relative helicity: 162 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Oct 24, 3:23 PM CDT, 3 hours 20 minutes earlier.

Area forecast discussion, Oct 24, 3:23 PM CDT, 3 hours 20 minutes before

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<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
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  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Hazardous weather outlook, Oct 24, 3:55 PM CDT, 2 hours 48 minutes before

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
355 PM CDT Sun Oct 24 2021

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-252100-
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-
355 PM CDT Sun Oct 24 2021 /455 PM EDT Sun Oct 24 2021/

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 damaging wind risk...up to 60mph.
  Elevated Flooding Risk.
  Elevated Non Thunderstorm Wind Risk.
  Significant Lakeshore Flood Risk.

DISCUSSION...

Rain, heavy at times will continue through this evening. Locally
heavy rainfall totals could result in flooding, particularly south
of I-80.

Scattered thunderstorms are likely, especially this evening and
south of I-80. There is a small threat of severe thunderstorms
south of Illinois Route 24 this evening.

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

Monday...
  Elevated Non Thunderstorm Wind Risk, mainly near the lake.
  Significant Lakeshore Flood Risk.

.SPOTTER INFORMATION STATEMENT...

  Spotters may be needed south of IL Route 24 this evening.

GENERAL STORM MOTION OF THE DAY:

  Moving toward northeast 40 mph.

LMZ740>745-252100-
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-
355 PM CDT Sun Oct 24 2021

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...

  Gale force winds and or very hazardous waves.
  Limited Thunderstorm Risk.

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

Monday...
  Gale force winds and or very hazardous waves are likely.
Tuesday...
  Hazardous conditions for small craft are likely.
Friday and Saturday...
  Hazardous conditions for small craft are likely.

- Izzi

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In the hours before

Special weather statement, Oct 24, 6:08 PM CDT, 35 minutes before

Special Weather Statement
National Weather Service Chicago/Romeoville
608 PM CDT Sun Oct 24 2021

ILZ023-032-033-039-250000-
Livingston IL-Iroquois IL-Kankakee IL-Ford IL-
608 PM CDT Sun Oct 24 2021

...Strong thunderstorms will impact portions of Livingston,
southwestern Kankakee, Ford and western Iroquois Counties through 700
PM CDT...

At 607 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from Dwight to near Dwight to near Bloomington.
Movement was east at 45 mph. These have produced wind gusts over 45
mph.

HAZARD...Wind gusts of 50 to 55 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Kankakee, Pontiac, Paxton, Dwight, Fairbury, Gibson City, Gilman,
Herscher, Clifton, Chatsworth, Gridley, Onarga, Forrest, Flanagan,
Chebanse, Odell, Piper City, Ashkum, Aroma Park and Buckley.

This includes...  Kankakee Community College and Kankakee County
Fairgrounds and Speedway.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4062 8846 4062 8857 4076 8858 4075 8893
      4099 8892 4111 8858 4112 8781 4049 8792
      4049 8794 4040 8793 4040 8846
TIME...MOT...LOC 2307Z 254DEG 38KT 4110 8845 4088 8875 4048 8904

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...55 MPH

Friedlein

Special weather statement, Oct 24, 6:43 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service Chicago/Romeoville
643 PM CDT Sun Oct 24 2021

ILZ023-033-INZ001-002-010-011-019-250100-
Iroquois IL-Kankakee IL-Porter IN-Newton IN-Jasper IN-Lake IN-
Benton IN-
643 PM CDT Sun Oct 24 2021

...Strong thunderstorms moving across the area through 800 PM CDT...

At 641 PM CDT/741 PM EDT/, Doppler radar was tracking strong
thunderstorms along a line extending from near Manteno to near
Paxton, or near I-57. Movement was east at 45 mph. These storms have
produced wind gusts greater than 45 mph.

HAZARD...Wind gusts of 50 to 55 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Kankakee, Bradley, Lowell, Rensselaer, Watseka, DeMotte, Hebron,
Momence, Fowler, Kentland, Milford, Otterbein, Remington, Morocco,
Wheatfield, Lake Village, Roselawn, Kouts, Lake Dalecarlia and Grant
Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4091 8699 4084 8699 4084 8710 4048 8709
      4049 8793 4086 8793 4130 8778 4130 8753
      4133 8753 4140 8693 4091 8693
TIME...MOT...LOC 2341Z 258DEG 38KT 4122 8781 4090 8792 4050 8821

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...55 MPH

Friedlein

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 23, 9:57 PM CDT	River Flood Watch	LOT	Cook	12 hr
Oct 23, 9:57 PM CDT	River Flood Watch	LOT	Iroquois	38 hr
Oct 23, 9:57 PM CDT	River Flood Watch	LOT	LaSalle	4 days
Oct 23, 9:57 PM CDT	River Flood Watch	LOT	Livingston	3 days
Oct 24, 3:10 AM CDT	Wind Advisory	LOT	Boone, Cook, DeKalb, DuPage, Ford, Grundy and 9 more	36 hr
Oct 24, 10:08 AM CDT	River Flood Warning	LOT	Cook	53 hr
Oct 24, 11:28 AM CDT	River Flood Watch	LOT	Grundy, LaSalle	71 hr
Oct 24, 11:28 AM CDT	River Flood Watch	LOT	Bureau, LaSalle, Putnam	6 days
Oct 24, 11:28 AM CDT	River Flood Watch	LOT	LaSalle	3 days
Oct 24, 6:08 PM CDT	Special Weather Statement	LOT	Ford, Livingston	52 min

Nearby

Special Weather Statements in Indiana, 2021 Special Weather Statements in Illinois, 2021 Every special weather statement in 2021

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.