Alert archive / Kentucky / Frost Advisories in 2017

Frost Advisory 1, NWS Paducah, KY

April 7, 201718 counties in Kentucky; 14 counties in Illinois

NWS Paducah, KY issued this frost advisory at Apr 7, 2017, 3:06 AM CDT for 18 counties in Kentucky; 14 counties in Illinois. It took effect at Apr 7, 2017, 11:00 PM CDT. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued: Apr 7, 2017, 3:06 AM CDT (08:06 UTC)
In effect from: Apr 7, 2017, 11:00 PM CDT
Expired: Apr 8, 2017, 8:00 AM CDT
In force: 9 hr
Issued by: NWS Paducah, KY

All 32 counties

Edwards County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jefferson County, IL, Johnson County, IL, Massac County, IL, Pope County, IL, Saline County, IL, Wabash County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Caldwell County, KY, Calloway County, KY, Christian County, KY, Crittenden County, KY, Daviess County, KY, Graves County, KY, Henderson County, KY, Hopkins County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, McLean County, KY, Muhlenberg County, KY, Todd County, KY, Trigg County, KY, Union County, KY, Webster County, KY

The radar

The Paducah radar (KPAH), 74 km from the middle of the area, began a volume at 08:05 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, 8.1 hours before the alert went out and 204 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: 11 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 2278 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: 158 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

What forecasters said that day

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

NWS Paducah, KY wrote its last area forecast discussion before this frost advisory went out at Apr 6, 6:23 PM CDT, 8 hours 43 minutes earlier.

Area forecast discussion, Apr 6, 6:23 PM CDT, 8 hours 43 minutes before

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Hazardous weather outlook, Apr 6, 5:40 PM CDT, 9 hours 26 minutes before

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Nearby

Frost Advisories in Kentucky, 2017 Frost Advisories in Illinois, 2017 Every frost advisory in 2017

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.