Alert archive / Illinois / Wind Chill Advisories in 2016

Wind Chill Advisory 4, NWS Chicago, IL

December 14, 201616 counties in Illinois; 5 counties in Indiana

NWS Chicago, IL issued this wind chill advisory at Dec 14, 2016, 3:24 AM CST for 16 counties in Illinois; 5 counties in Indiana. It took effect at Dec 14, 2016, 9:00 PM CST. It was in force for 13 hr.

The area

The counties it named.

The facts

Issued: Dec 14, 2016, 3:24 AM CST (09:24 UTC)
In effect from: Dec 14, 2016, 9:00 PM CST
Expired: Dec 15, 2016, 10:00 AM CST
In force: 13 hr
Issued by: NWS Chicago, IL

All 21 counties

Boone 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, Lee County, IL, Livingston County, IL, McHenry County, IL, Ogle County, IL, Winnebago County, IL, Benton County, IN, Jasper County, IN, Lake County, IN, Newton County, IN, Porter County, IN

The radar

The Chicago radar (KLOT), 15 km from the middle of the area, began a volume at 09:26 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, 9.4 hours before the alert went out and 156 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: 1704 m above ground
0-6 km bulk shear: 96 kt
0-1 km storm-relative helicity: -54 m²/s²
0-3 km storm-relative helicity: 139 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 wind chill 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 chill advisory went out at Dec 13, 5:40 PM CST, 9 hours 44 minutes earlier.

Area forecast discussion, Dec 13, 5:40 PM CST, 9 hours 44 minutes before

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Hazardous weather outlook, Dec 13, 4:39 PM CST, 10 hours 45 minutes before

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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.
      </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
Dec 14, 4:08 PM CST	Winter Weather Advisory	LOT	Boone, DeKalb, DuPage, Kane, Kendall, Lake and 4 more	6 hr

Nearby

Wind Chill Advisories in Illinois, 2016 Wind Chill Advisories in Indiana, 2016 Every wind chill advisory in 2016

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.