Alert archive / Kentucky / Frost Advisories in 2020

Frost Advisory 5, NWS Jackson, KY

May 9, 20207 counties in Kentucky

NWS Jackson, KY issued this frost advisory at May 9, 2020, 4:12 AM EDT for 7 counties in Kentucky. It took effect at May 9, 2020, 11:00 PM EDT. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued
May 9, 2020, 4:12 AM EDT (08:12 UTC)
In effect from
May 9, 2020, 11:00 PM EDT
Expired
May 10, 2020, 9:00 AM EDT
In force
10 hr
Issued by
NWS Jackson, KY

Counties Bath County, KY, Fleming County, KY, McCreary County, KY, Montgomery County, KY, Pulaski County, KY, Rockcastle County, KY, Wayne County, KY

The radar

The Jackson,KY radar (KJKL), 81 km from the middle of the area, began a volume at 08:11 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, 8.2 hours before the alert went out and 261 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, Nashville Metro, TN at 00:00Z on 2020-05-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3 joules per kilogram.LCLLFCEL10008507005003002001001 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, Nashville Metro, TN at 00:00Z on 2020-05-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -50 square meters per square second.1939587897117136156Sfc1 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
3 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
1325 m above ground
0-6 km bulk shear
66 kt
0-1 km storm-relative helicity
-50 m²/s²
0-3 km storm-relative helicity
1 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
May 9, 4:12 AM EDTFreeze WarningJKLBell, Breathitt, Clay, Elliott, Estill, Floyd and 20 more29 hr

Nearby

Frost Advisories in Kentucky, 2020Every frost advisory in 2020

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.