Alert archive / Illinois / Dense Fog Advisories in 2016

Dense Fog Advisory 9, NWS Lincoln, IL

May 11, 201635 counties in Illinois

NWS Lincoln, IL issued this dense fog advisory at May 11, 2016, 1:53 AM CDT for 35 counties in Illinois. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: May 11, 2016, 1:53 AM CDT (06:53 UTC)
Expired: May 11, 2016, 9:00 AM CDT
In force: 7 hr
Issued by: NWS Lincoln, IL

All 35 counties

Cass County, IL, Champaign County, IL, Christian County, IL, Clark County, IL, Clay County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, DeWitt County, IL, Douglas County, IL, Edgar County, IL, Effingham County, IL, Fulton County, IL, Jasper County, IL, Knox County, IL, Lawrence County, IL, Logan County, IL, Macon County, IL, Marshall County, IL, Mason County, IL, McLean County, IL, Menard County, IL, Morgan County, IL, Moultrie County, IL, Peoria County, IL, Piatt County, IL, Richland County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Shelby County, IL, Stark County, IL, Tazewell County, IL, Vermilion County, IL, Woodford County, IL

The radar

The Lincoln radar (KILX), 42 km from the middle of the area, began a volume at 06:58 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

Cncnati-Daytn, OH (KILN), launched 00:00Z, 6.9 hours before the alert went out and 449 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: 1236 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 154 m²/s²
0-3 km storm-relative helicity: 165 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 dense fog advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Lincoln, IL wrote its last area forecast discussion before this dense fog advisory went out at May 10, 11:14 PM CDT, 2 hours 39 minutes earlier.

Area forecast discussion, May 10, 11:14 PM CDT, 2 hours 39 minutes before

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Hazardous weather outlook, May 10, 3:20 PM CDT, 10 hours 33 minutes before

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  <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 Lincoln, IL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 11, 11:18 AM CDT	River Flood Warning	ILX	Cass, Fulton, Mason	13 days
May 11, 11:18 AM CDT	River Flood Warning	ILX	Brown, Cass, Morgan, Schuyler	14 days
May 11, 1:17 PM CDT	Severe Thunderstorm Warning	ILX	Cass, Menard, Morgan, Sangamon	28 min
May 11, 1:38 PM CDT	Severe Thunderstorm Warning	ILX	Logan, Menard, Sangamon	37 min
May 11, 2:08 PM CDT	Severe Thunderstorm Warning	ILX	Logan, Sangamon	37 min
May 11, 2:23 PM CDT	Special Weather Statement	ILX	Macon	37 min
May 11, 2:48 PM CDT	Severe Thunderstorm Warning	ILX	DeWitt, Macon, Piatt	42 min
May 11, 3:15 PM CDT	Special Weather Statement	ILX	Richland	30 min
May 11, 3:18 PM CDT	Severe Thunderstorm Warning	ILX	Champaign, Douglas, Piatt	42 min
May 11, 3:21 PM CDT	Severe Thunderstorm Warning	ILX	Clay, Richland	39 min
May 11, 3:34 PM CDT	Severe Thunderstorm Warning	ILX	Clay, Effingham, Jasper	56 min
May 11, 3:44 PM CDT	Severe Thunderstorm Warning	ILX	Champaign, Douglas	46 min
May 11, 3:58 PM CDT	Severe Thunderstorm Warning	ILX	Clay, Jasper, Lawrence, Richland	62 min
May 11, 4:00 PM CDT	Severe Thunderstorm Warning	ILX	Crawford, Lawrence, Richland	45 min
May 11, 4:17 PM CDT	Severe Thunderstorm Warning	ILX	Clay, Cumberland, Effingham, Jasper, Richland, Shelby	43 min
May 11, 4:24 PM CDT	Special Weather Statement	ILX	Edgar, Vermilion	51 min
May 11, 4:31 PM CDT	Tornado Warning	ILX	Cumberland, Effingham, Jasper	29 min
May 11, 4:36 PM CDT	Special Weather Statement	ILX	Douglas	39 min
May 11, 4:44 PM CDT	Severe Thunderstorm Warning	ILX	Crawford, Lawrence	46 min
May 11, 4:51 PM CDT	Severe Thunderstorm Warning	ILX	Crawford, Lawrence, Richland	39 min
May 11, 5:02 PM CDT	Flash Flood Warning	ILX	Effingham	3 hr
May 11, 5:08 PM CDT	Severe Thunderstorm Warning	ILX	Clark, Crawford, Cumberland, Jasper	37 min
May 11, 5:17 PM CDT	Special Weather Statement	ILX	Edgar	43 min
May 11, 5:26 PM CDT	Severe Thunderstorm Warning	ILX	Lawrence	19 min

Nearby

Dense Fog Advisories in Illinois, 2016 Every dense fog 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.