Alert archive / Indiana / Dense Fog Advisories in 2012

Dense Fog Advisory 2, NWS Indianapolis, IN

May 1, 201225 counties in Indiana

NWS Indianapolis, IN issued this dense fog advisory at May 1, 2012, 6:02 AM EDT for 25 counties in Indiana. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued: May 1, 2012, 6:02 AM EDT (10:02 UTC)
Expired: May 1, 2012, 9:39 AM EDT
In force: 4 hr
Issued by: NWS Indianapolis, IN

All 25 counties

Bartholomew County, IN, Brown County, IN, Clay County, IN, Daviess County, IN, Decatur County, IN, Greene County, IN, Hancock County, IN, Hendricks County, IN, Jackson County, IN, Jennings County, IN, Johnson County, IN, Knox County, IN, Lawrence County, IN, Marion County, IN, Martin County, IN, Monroe County, IN, Morgan County, IN, Owen County, IN, Parke County, IN, Putnam County, IN, Rush County, IN, Shelby County, IN, Sullivan County, IN, Vermillion County, IN, Vigo County, IN

The radar

The Indianapolis radar (KIND), 49 km from the middle of the area, began a volume at 10:06 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, 10.0 hours before the alert went out and 234 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: 98 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 1642 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 102 m²/s²
0-3 km storm-relative helicity: 94 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

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 May 1, 4:30 AM EDT, 1 hour 32 minutes earlier.

Area forecast discussion, May 1, 4:30 AM EDT, 1 hour 32 minutes before

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Hazardous weather outlook, May 1, 4:04 AM EDT, 1 hour 58 minutes before

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In the hours before

Special weather statement, May 1, 4:25 AM EDT, 1 hour 37 minutes before

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      <div class="status" id="status">Temporary Notice</div>
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The office that day

Everything else NWS Indianapolis, IN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 1, 2:58 PM EDT	Severe Thunderstorm Warning	IND	Brown, Monroe, Morgan	47 min
May 1, 3:22 PM EDT	Tornado Warning	IND	Bartholomew, Brown	23 min
May 1, 3:42 PM EDT	Severe Thunderstorm Warning	IND	Bartholomew, Brown	48 min
May 1, 3:54 PM EDT	Severe Thunderstorm Warning	IND	Bartholomew, Decatur, Rush, Shelby	36 min
May 1, 4:03 PM EDT	Areal Flood Advisory	IND	Hamilton, Hancock, Johnson, Madison, Marion, Morgan and 1 more	3 hr
May 1, 4:13 PM EDT	Severe Thunderstorm Warning	IND	Hancock, Henry, Johnson, Marion, Rush, Shelby	47 min
May 1, 4:17 PM EDT	Severe Thunderstorm Warning	IND	Hancock, Henry, Madison, Randolph	43 min
May 1, 4:20 PM EDT	Severe Thunderstorm Warning	IND	Decatur, Rush, Shelby	25 min
May 1, 4:29 PM EDT	Severe Thunderstorm Warning	IND	Bartholomew, Decatur, Shelby	16 min
May 1, 4:48 PM EDT	Severe Thunderstorm Warning	IND	Henry, Rush	25 min
May 1, 4:51 PM EDT	Severe Thunderstorm Warning	IND	Randolph	39 min
May 1, 4:56 PM EDT	Severe Thunderstorm Warning	IND	Greene, Lawrence, Martin, Monroe	34 min
May 1, 5:20 PM EDT	Severe Thunderstorm Warning	IND	Bartholomew, Brown, Johnson, Morgan	40 min
May 1, 5:21 PM EDT	Severe Thunderstorm Warning	IND	Jackson, Lawrence	24 min
May 1, 5:31 PM EDT	Tornado Warning	IND	Jackson, Lawrence	29 min
May 1, 5:32 PM EDT	Severe Thunderstorm Warning	IND	Morgan	21 min
May 1, 5:46 PM EDT	Severe Thunderstorm Warning	IND	Jackson	29 min
May 1, 6:08 PM EDT	Severe Thunderstorm Warning	IND	Jackson, Jennings	26 min
May 1, 6:16 PM EDT	Tornado Warning	IND	Fountain, Vermillion, Warren	44 min
May 1, 6:49 PM EDT	Tornado Warning	IND	Fountain, Montgomery	41 min
May 1, 6:57 PM EDT	Severe Thunderstorm Warning	IND	Hendricks, Marion	36 min
May 1, 7:04 PM EDT	Severe Thunderstorm Warning	IND	Greene, Monroe, Owen	30 min
May 1, 7:07 PM EDT	Areal Flood Advisory	IND	Hendricks, Marion	5 hr
May 1, 7:08 PM EDT	Severe Thunderstorm Warning	IND	Daviess, Knox	28 min
May 1, 7:29 PM EDT	Tornado Warning	IND	Boone, Montgomery	46 min
May 1, 7:39 PM EDT	Severe Thunderstorm Warning	IND	Brown, Johnson, Monroe, Morgan	51 min
May 1, 7:54 PM EDT	Tornado Warning	IND	Brown	19 min

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.