Alert archive / Kentucky / Frost Advisories in 2021
Frost Advisory 6, NWS Louisville, KY
NWS Louisville, KY issued this frost advisory at May 7, 2021, 2:41 PM EDT for 8 counties in Kentucky; Jefferson County, Indiana. It took effect at May 8, 2021, 3:00 AM EDT. It was in force for 5 hr.
The area
The counties it named.
The facts
- Issued
- May 7, 2021, 2:41 PM EDT (18:41 UTC)
- In effect from
- May 8, 2021, 3:00 AM EDT
- Expired
- May 8, 2021, 8:00 AM EDT
- In force
- 5 hr
- Issued by
- NWS Louisville, KY
Counties Jefferson County, IN, Bourbon County, KY, Clark County, KY, Franklin County, KY, Harrison County, KY, Henry County, KY, Nicholas County, KY, Scott County, KY, Trimble County, KY
The radar
The Louisville radar (KLVX), 119 km from the middle of the area, began a volume at 18:46 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 12:00Z, 6.7 hours before the alert went out and 140 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
- 744 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- -44 m²/s²
- 0-3 km storm-relative helicity
- -39 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
171 WWUS73 KLMK 071841 NPWLMK URGENT - WEATHER MESSAGE National Weather Service Louisville KY 241 PM EDT Fri May 7 2021 INZ079-KYZ032-033-035>037-042-043-049-080900- /O.NEW.KLMK.FR.Y.0006.210508T0700Z-210508T1400Z/ Jefferson-Trimble-Henry-Franklin-Scott-Harrison-Bourbon-Nicholas- Clark- Including the cities of Madison, Bedford, Milton, New Castle, Frankfort, Georgetown, Cynthiana, Paris, Carlisle, and Winchester 241 PM EDT Fri May 7 2021 ...FROST ADVISORY IN EFFECT FROM 3 AM TO 10 AM EDT SATURDAY... The National Weather Service in Louisville has issued a Frost Advisory, which is in effect from 3 AM to 10 AM EDT Saturday. * TEMPERATURE...lows will briefly dip into the mid and upper 30s for a few hours around sunrise. * IMPACTS...Vegetation sensitive to frost may be damaged or killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Frost Advisory means that widespread frost is expected. && $$ 13
2 follow-up statements
837 WWUS73 KLMK 080624 NPWLMK URGENT - WEATHER MESSAGE National Weather Service Louisville KY 224 AM EDT Sat May 8 2021 INZ079-KYZ032-033-035>037-042-043-049-081200- /O.EXT.KLMK.FR.Y.0006.210508T0700Z-210508T1200Z/ Jefferson-Trimble-Henry-Franklin-Scott-Harrison-Bourbon-Nicholas- Clark- Including the cities of Madison, Bedford, Milton, New Castle, Frankfort, Georgetown, Cynthiana, Paris, Carlisle, and Winchester 224 AM EDT Sat May 8 2021 ...FROST ADVISORY NOW IN EFFECT UNTIL 8 AM EDT THIS MORNING... * TEMPERATURE...Lows will briefly dip into the upper 30s for a few hours around sunrise. * IMPACTS...Vegetation sensitive to frost may be damaged or killed if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Sensitive outdoor plants may be killed if left uncovered. && $$
498 WWUS73 KLMK 081217 NPWLMK URGENT - WEATHER MESSAGE National Weather Service Louisville KY 817 AM EDT Sat May 8 2021 INZ079-KYZ032-033-035>037-042-043-049-081330- /O.EXP.KLMK.FR.Y.0006.000000T0000Z-210508T1200Z/ Jefferson-Trimble-Henry-Franklin-Scott-Harrison-Bourbon-Nicholas- Clark- Including the cities of Madison, Bedford, Milton, New Castle, Frankfort, Georgetown, Cynthiana, Paris, Carlisle, and Winchester 817 AM EDT Sat May 8 2021 ...FROST ADVISORY HAS EXPIRED... Temperatures in the advisory area are warming into the 40s, and the potential for frost has ended. $$ RAS
Nearby
Frost Advisories in Kentucky, 2021Frost Advisories in Indiana, 2021Every frost 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.