Alert archive / Ohio / Frost Advisories in 2018

Frost Advisory 3, NWS Wilmington, OH

April 29, 201825 counties in Ohio; 11 counties in Kentucky; 8 counties in Indiana

NWS Wilmington, OH issued this frost advisory at Apr 29, 2018, 9:38 AM EDT for 25 counties in Ohio; 11 counties in Kentucky; 8 counties in Indiana. It took effect at Apr 30, 2018, 1:00 AM EDT. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: Apr 29, 2018, 9:38 AM EDT (13:38 UTC)
In effect from: Apr 30, 2018, 1:00 AM EDT
Expired: Apr 30, 2018, 9:00 AM EDT
In force: 8 hr
Issued by: NWS Wilmington, OH

All 44 counties

Dearborn County, IN, Fayette County, IN, Franklin County, IN, Ohio County, IN, Ripley County, IN, Switzerland County, IN, Union County, IN, Wayne County, IN, Boone County, KY, Bracken County, KY, Campbell County, KY, Carroll County, KY, Gallatin County, KY, Grant County, KY, Kenton County, KY, Mason County, KY, Owen County, KY, Pendleton County, KY, Robertson County, KY, Adams County, OH, Auglaize County, OH, Brown County, OH, Butler County, OH, Champaign County, OH, Clark County, OH, Clermont County, OH, Clinton County, OH, Darke County, OH, Delaware County, OH, Fayette County, OH, Franklin County, OH, Greene County, OH, Hamilton County, OH, Hardin County, OH, Highland County, OH, Logan County, OH, Madison County, OH, Mercer County, OH, Miami County, OH, Montgomery County, OH, Preble County, OH, Shelby County, OH, Union County, OH, Warren County, OH

The radar

The Cincinnati radar (KILN), 39 km from the middle of the area, began a volume at 13:35 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, 1.6 hours before the alert went out and 41 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: 1593 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 2 m²/s²
0-3 km storm-relative helicity: 51 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 frost advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Wilmington, OH wrote its last area forecast discussion before this frost advisory went out at Apr 28, 3:10 PM EDT, 18 hours 28 minutes earlier.

Area forecast discussion, Apr 28, 3:10 PM EDT, 18 hours 28 minutes before

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The office that day

Everything else NWS Wilmington, OH issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 29, 9:38 AM EDT	Freeze Warning	ILN	Fairfield, Hocking, Licking, Pickaway, Pike, Ross and 1 more	23 hr

Nearby

Frost Advisories in Ohio, 2018 Frost Advisories in Kentucky, 2018 Frost Advisories in Indiana, 2018 Every frost advisory in 2018

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.