Alert archive / Indiana / Frost Advisories in 2021
Frost Advisory 7, NWS Louisville, KY
NWS Louisville, KY issued this frost advisory at May 11, 2021, 9:11 PM EDT for 4 counties in Indiana. It took effect at May 12, 2021, 3:00 AM EDT. It was in force for 118 min.
The area
The counties it named.
The facts
- Issued
- May 11, 2021, 9:11 PM EDT (01:11 UTC)
- In effect from
- May 12, 2021, 3:00 AM EDT
- Expired
- May 12, 2021, 4:58 AM EDT
- In force
- 118 min
- Issued by
- NWS Louisville, KY
Counties Jefferson County, IN, Orange County, IN, Scott County, IN, Washington County, IN
The radar
The Louisville radar (KLVX), 75 km from the middle of the area, began a volume at 01:10 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, 1.2 hours before the alert went out and 205 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
- 3 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 1769 m above ground
- 0-6 km bulk shear
- 73 kt
- 0-1 km storm-relative helicity
- -5 m²/s²
- 0-3 km storm-relative helicity
- -33 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
597 WWUS73 KLMK 120111 NPWLMK URGENT - WEATHER MESSAGE National Weather Service Louisville KY 911 PM EDT Tue May 11 2021 ...Frost Possible Toward Dawn On Wednesday... The combination of clearing skies, slackening winds, and cool low temperatures dipping into the 30s will allow for potential frost formation in some areas toward dawn. INZ076>079-120900- /O.NEW.KLMK.FR.Y.0007.210512T0700Z-210512T1300Z/ Orange-Washington-Scott-Jefferson- Including the cities of Paoli, Salem, Scottsburg, and Madison 911 PM EDT Tue May 11 2021 ...FROST ADVISORY IN EFFECT FROM 3 AM TO 9 AM EDT WEDNESDAY... The National Weather Service in Louisville has issued a Frost Advisory, which is in effect from 3 AM to 9 AM EDT Wednesday. * TEMPERATURE...Upper 30s, with a few localized areas in the mid 30s. * IMPACTS...Frost could damage or kill sensitive outdoor vegetation if left unprotected. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Frost Advisory means that frost is expected. Sensitive outdoor plants may be killed if left uncovered. && $$ BJS
2 follow-up statements
022 WWUS73 KLMK 120428 NPWLMK URGENT - WEATHER MESSAGE National Weather Service Louisville KY 1228 AM EDT Wed May 12 2021 INZ076>079-121300- /O.CON.KLMK.FR.Y.0007.210512T0700Z-210512T1300Z/ Orange-Washington-Scott-Jefferson- Including the cities of Paoli, Salem, Scottsburg, and Madison 1228 AM EDT Wed May 12 2021 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM EDT THIS MORNING... * TEMPERATURE...Upper 30s, with a few localized areas in the mid 30s. * IMPACTS...Frost could damage or kill sensitive outdoor vegetation if left unprotected. PRECAUTIONARY/PREPAREDNESS ACTIONS... Sensitive outdoor plants may be killed if left uncovered. && $$
944 WWUS73 KLMK 120858 NPWLMK URGENT - WEATHER MESSAGE National Weather Service Louisville KY 458 AM EDT Wed May 12 2021 INZ076>079-121000- /O.CAN.KLMK.FR.Y.0007.000000T0000Z-210512T1300Z/ Orange-Washington-Scott-Jefferson- Including the cities of Paoli, Salem, Scottsburg, and Madison 458 AM EDT Wed May 12 2021 ...FROST ADVISORY IS CANCELLED... The National Weather Service in Louisville has cancelled the Frost Advisory. Light northeasterly winds and temperatures falling into the low 40s should prevent frost from developing this morning. As a result, the frost advisory has been cancelled early. $$
Nearby
Frost 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.