Alert archive / Indiana / Dense Fog Advisories in 2021
Dense Fog Advisory 1, NWS Indianapolis, IN
NWS Indianapolis, IN issued this dense fog advisory at Mar 16, 2021, 3:22 AM EDT for 24 counties in Indiana. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Mar 16, 2021, 3:22 AM EDT (07:22 UTC)
- Expired
- Mar 16, 2021, 11:00 AM EDT
- In force
- 8 hr
- Issued by
- NWS Indianapolis, IN
All 24 counties
Boone County, IN, Brown County, IN, Carroll County, IN, Clay County, IN, Clinton County, IN, Daviess County, IN, Fountain County, IN, Greene County, IN, Hendricks County, IN, Jackson County, IN, Knox County, IN, Lawrence County, IN, Martin County, IN, Monroe County, IN, Montgomery County, IN, Morgan County, IN, Owen County, IN, Parke County, IN, Putnam County, IN, Sullivan County, IN, Tippecanoe County, IN, Vermillion County, IN, Vigo County, IN, Warren County, IN
The radar
The Indianapolis radar (KIND), 53 km from the middle of the area, began a volume at 07:24 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, 7.4 hours before the alert went out and 164 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 518 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 158 m²/s²
- 0-3 km storm-relative helicity
- 164 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Mar 15, 7:47 PM EDT, 7 hours 35 minutes earlier.
Area forecast discussion, Mar 15, 7:47 PM EDT, 7 hours 35 minutes before
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</html>Hazardous weather outlook, Mar 15, 3:58 PM EDT, 11 hours 24 minutes before
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</html>Nearby
Dense Fog Advisories in Indiana, 2021Every dense fog advisory in 2021
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.