Alert archive / Illinois / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 50, NWS Chicago, IL

July 27, 1995Kendall County, Illinois

NWS Chicago, IL issued this severe thunderstorm warning at Jul 27, 1995, 8:08 PM CDT for Kendall County, Illinois. It was in force for 27 min.

The area

The counties it named.

The facts

Issued: Jul 27, 1995, 8:08 PM CDT (01:08 UTC)
Expired: Jul 27, 1995, 8:35 PM CDT
In force: 27 min
Issued by: NWS Chicago, IL
Area: Whole counties

County Kendall County, IL

The radar

The Chicago radar (KLOT), 29 km from the middle of the area, began a volume at 01:07 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, 1.1 hours before the alert went out and 161 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: 2794 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 1004 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 94 m²/s²
0-3 km storm-relative helicity: 202 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 5.7

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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.

In the hours before

Special weather statement, Jul 27, 7:07 PM CDT, 1 hour 1 minute before

ILZ005-006-012>014-020-022-INZ001-280000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO IL
100 PM CDT THU JUL 27 1995

THUNDERSTORMS APPROACHING THE CHICAGO AREA WILL BE PUSHING FROM
NORTHWEST TO SOUTHEAST ACROSS THE METROPOLITAN AREA...ARRIVING IN
THE FAR NORTH AND NORTHWEST SUBURBS BY 730 PM AND PUSHING INTO
LAKE COUNTY INDIANA BY ABOUT 9PM.

THESE STORMS HAVE HAD A HISTORY OF SEVERE WEATHER...AND A TORNADO
WATCH REMAINS IN EFFECT FOR THE AREA UNTIL MIDNIGHT.

AT 7PM THE LEADING EDGE OF THE THUNDERSTORM AREA EXTENDED FROM
MILWAUKEE...ABOUT 90 MILES NORTH OF CHICAGO...TO ABOUT 60 MILES WEST
OF THE CHICAGO. THE THUNDERSTORM LINE WAS MOVING SOUTHEAST AT  35 MPH.

AT 7PM A WIND GUST OF 50 MPH WAS REPORTED FROM LAKE IN THE HILLS IN
MC HENRY COUNTY.

KOENEMAN

Special weather statement, Jul 27, 7:50 PM CDT, 18 minutes before

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Special weather statement, Jul 27, 7:50 PM CDT, 18 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <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.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 7:19 PM CDT	Severe Thunderstorm Warning	LOT	DeKalb, Ogle	26 min
Jul 27, 7:22 PM CDT	Tornado Warning	LOT	Lee	18 min

Nearby

Severe Thunderstorm Warnings in Illinois, 1995 Every severe thunderstorm warning in 1995

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.