Alert archive / Kentucky / Freeze Warnings in 2015

Freeze Warning 2, NWS Louisville, KY

April 23, 201535 counties in Kentucky; 8 counties in Indiana

NWS Louisville, KY issued this freeze warning at Apr 23, 2015, 2:21 PM CDT for 35 counties in Kentucky; 8 counties in Indiana. It took effect at Apr 24, 2015, 2:00 AM CDT. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 23, 2015, 2:21 PM CDT (19:21 UTC)
In effect from: Apr 24, 2015, 2:00 AM CDT
Expired: Apr 24, 2015, 8:00 AM CDT
In force: 6 hr
Issued by: NWS Louisville, KY

All 43 counties

Clark County, IN, Crawford County, IN, Floyd County, IN, Harrison County, IN, Jefferson County, IN, Orange County, IN, Scott County, IN, Washington County, IN, Adair County, KY, Anderson County, KY, Bourbon County, KY, Boyle County, KY, Bullitt County, KY, Casey County, KY, Clark County, KY, Clinton County, KY, Cumberland County, KY, Fayette County, KY, Franklin County, KY, Garrard County, KY, Green County, KY, Hardin County, KY, Harrison County, KY, Henry County, KY, Jefferson County, KY, Jessamine County, KY, Larue County, KY, Lincoln County, KY, Madison County, KY, Marion County, KY, Meade County, KY, Mercer County, KY, Nelson County, KY, Nicholas County, KY, Oldham County, KY, Russell County, KY, Scott County, KY, Shelby County, KY, Spencer County, KY, Taylor County, KY, Trimble County, KY, Washington County, KY, Woodford County, KY

The radar

The Louisville radar (KLVX), 64 km from the middle of the area, began a volume at 19:23 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 12:00Z, 7.4 hours before the alert went out and 236 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2251 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: -187 m²/s²
0-3 km storm-relative helicity: 124 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this freeze warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Louisville, KY wrote its last area forecast discussion before this freeze warning went out at Apr 23, 2:06 PM CDT, 15 minutes earlier.

Area forecast discussion, Apr 23, 2:06 PM CDT, 15 minutes before

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Hazardous weather outlook, Apr 23, 2:11 PM CDT, 10 minutes before

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In the hours before

Special weather statement, Apr 23, 9:04 AM CDT, 5 hours 17 minutes before

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Special weather statement, Apr 23, 11:45 AM CDT, 2 hours 36 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 23, 2:08 AM CDT	Frost Advisory	LMK	Adair, Anderson, Barren, Bourbon, Boyle, Breckinridge and 38 more	30 hr

Nearby

Freeze Warnings in Kentucky, 2015 Freeze Warnings in Indiana, 2015 Every freeze warning in 2015

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.