Alert archive / Indiana / Dense Fog Advisories in 2021

Dense Fog Advisory 3, NWS Louisville, KY

March 16, 2021Hancock County, Kentucky; 5 counties in Indiana

NWS Louisville, KY issued this dense fog advisory at Mar 16, 2021, 2:28 AM CDT for Hancock County, Kentucky; 5 counties in Indiana. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued
Mar 16, 2021, 2:28 AM CDT (07:28 UTC)
Expired
Mar 16, 2021, 10:00 AM CDT
In force
8 hr
Issued by
NWS Louisville, KY

Counties Crawford County, IN, Dubois County, IN, Orange County, IN, Perry County, IN, Washington County, IN, Hancock County, KY

The radar

The Louisville radar (KLVX), 64 km from the middle of the area, began a volume at 07:27 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, 7.5 hours before the alert went out and 272 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-pSkew-T log-p diagram, Lincoln, IL at 00:00Z on 2021-03-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 00:00Z on 2021-03-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 158 square meters per square second.1939587897117136Sfc1 km3 km6 km9 kmRMLM
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
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

Open this sounding in Storm Lab

Nearby

Dense Fog Advisories in Indiana, 2021Dense Fog Advisories in Kentucky, 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.