Alert archive / Indiana / Dense Fog Advisories in 2012

Dense Fog Advisory 3, NWS Indianapolis, IN

September 6, 201219 counties in Indiana

NWS Indianapolis, IN issued this dense fog advisory at Sep 6, 2012, 5:30 AM EDT for 19 counties in Indiana. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued: Sep 6, 2012, 5:30 AM EDT (09:30 UTC)
Expired: Sep 6, 2012, 10:00 AM EDT
In force: 5 hr
Issued by: NWS Indianapolis, IN

Counties Bartholomew County, IN, Brown County, IN, Clay County, IN, Daviess County, IN, Decatur County, IN, Greene County, IN, Jackson County, IN, Jennings County, IN, Johnson County, IN, Knox County, IN, Lawrence County, IN, Martin County, IN, Monroe County, IN, Morgan County, IN, Owen County, IN, Rush County, IN, Shelby County, IN, Sullivan County, IN, Vigo County, IN

The radar

The Indianapolis radar (KIND), 63 km from the middle of the area, began a volume at 09:34 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

Nashville Metro, TN (KBNA), launched 00:00Z, 9.5 hours before the alert went out and 337 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: 75 J/kg
Mixed-layer CIN: -145 J/kg
Mixed-layer LCL: 689 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: -149 m²/s²
0-3 km storm-relative helicity: -9 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

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 Indianapolis, IN wrote its last area forecast discussion before this dense fog advisory went out at Sep 6, 4:16 AM EDT, 1 hour 14 minutes earlier.

Area forecast discussion, Sep 6, 4:16 AM EDT, 1 hour 14 minutes before

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Hazardous weather outlook, Sep 6, 3:57 AM EDT, 1 hour 33 minutes before

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In the hours before

Special weather statement, Sep 6, 4:35 AM EDT, 55 minutes before

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<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.
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        Please try again in a few minutes.
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      <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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Nearby

Dense Fog Advisories in Indiana, 2012 Every dense fog advisory in 2012

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.