Alert archive / Indiana / Frost Advisories in 2018

Frost Advisory 6, NWS Louisville, KY

October 15, 2018Trimble County, Kentucky; 5 counties in Indiana

NWS Louisville, KY issued this frost advisory at Oct 15, 2018, 3:36 AM EDT for Trimble County, Kentucky; 5 counties in Indiana. It took effect at Oct 16, 2018, 3:00 AM EDT. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
Oct 15, 2018, 3:36 AM EDT (07:36 UTC)
In effect from
Oct 16, 2018, 3:00 AM EDT
Expired
Oct 16, 2018, 8:57 AM EDT
In force
6 hr
Issued by
NWS Louisville, KY

Counties Dubois County, IN, Jefferson County, IN, Orange County, IN, Scott County, IN, Washington County, IN, Trimble County, KY

The radar

The Louisville radar (KLVX), 69 km from the middle of the area, began a volume at 07:39 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, 7.6 hours before the alert went out and 211 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, Cncnati-Daytn, OH at 00:00Z on 2018-10-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Cncnati-Daytn, OH at 00:00Z on 2018-10-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 260 square meters per square second.1939587897117Sfc1 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
501 m above ground
0-6 km bulk shear
68 kt
0-1 km storm-relative helicity
260 m²/s²
0-3 km storm-relative helicity
355 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Louisville, KY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 15, 9:45 AM EDTAreal Flood AdvisoryLMKCumberland, Monroe2 hr
Oct 15, 11:06 AM EDTAreal Flood AdvisoryLMKClinton, Cumberland114 min

Nearby

Frost Advisories in Indiana, 2018Frost Advisories in Kentucky, 2018Every frost advisory in 2018

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.