Alert archive / Ohio / Flash Flood Watches in 2020

Flash Flood Watch 9, NWS Wilmington, OH

August 14, 202028 counties in Ohio; 12 counties in Kentucky; Dearborn County, Ohio County, Switzerland County, Indiana

NWS Wilmington, OH issued this flash flood watch at Aug 14, 2020, 10:57 AM EDT for 28 counties in Ohio; 12 counties in Kentucky; Dearborn County, Ohio County, Switzerland County, Indiana. It took effect at Aug 14, 2020, 2:00 PM EDT. It was in force for 21 hr.

The area

The counties it named.

The facts

Issued: Aug 14, 2020, 10:57 AM EDT (14:57 UTC)
In effect from: Aug 14, 2020, 2:00 PM EDT
Expired: Aug 15, 2020, 11:00 AM EDT
In force: 21 hr
Issued by: NWS Wilmington, OH
Flood severity: None

All 43 counties

Dearborn County, IN, Ohio County, IN, Switzerland County, IN, Boone County, KY, Bracken County, KY, Campbell County, KY, Carroll County, KY, Gallatin County, KY, Grant County, KY, Kenton County, KY, Lewis County, KY, Mason County, KY, Owen County, KY, Pendleton County, KY, Robertson County, KY, Adams 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, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Greene County, OH, Hamilton County, OH, Highland County, OH, Hocking County, OH, Logan County, OH, Madison County, OH, Miami County, OH, Montgomery County, OH, Pickaway County, OH, Pike County, OH, Preble County, OH, Ross County, OH, Scioto County, OH, Shelby County, OH, Union County, OH, Warren County, OH

The radar

The Cincinnati radar (KILN), 16 km from the middle of the area, began a volume at 14:59 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, 3.0 hours before the alert went out and 18 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: 336 J/kg
Mixed-layer CIN: -102 J/kg
Mixed-layer LCL: 1328 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 8 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 flash flood watch 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 flash flood watch went out at Aug 14, 9:00 AM EDT, 1 hour 57 minutes earlier.

Area forecast discussion, Aug 14, 9:00 AM EDT, 1 hour 57 minutes before

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Hazardous weather outlook, Aug 14, 8:13 AM EDT, 2 hours 44 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
Aug 14, 9:40 AM EDT	Areal Flood Advisory	ILN	Clermont	2 hr
Aug 14, 2:44 PM EDT	Areal Flood Advisory	ILN	Hardin	3 hr
Aug 14, 4:07 PM EDT	Special Weather Statement	ILN	Fairfield	23 min
Aug 14, 4:51 PM EDT	Special Weather Statement	ILN	Franklin	24 min
Aug 14, 5:30 PM EDT	Special Weather Statement	ILN	Hocking	30 min
Aug 14, 5:57 PM EDT	Special Weather Statement	ILN	Union	33 min
Aug 14, 7:00 PM EDT	Special Weather Statement	ILN	Union	30 min
Aug 14, 7:08 PM EDT	Areal Flood Advisory	ILN	Hardin	2 hr
Aug 14, 7:30 PM EDT	Special Weather Statement	ILN	Champaign	30 min
Aug 14, 7:35 PM EDT	Special Weather Statement	ILN	Logan	25 min
Aug 14, 7:40 PM EDT	Flash Flood Warning	ILN	Hardin	104 min
Aug 14, 7:57 PM EDT	Special Weather Statement	ILN	Champaign, Clark, Logan	33 min

Nearby

Flash Flood Watches in Ohio, 2020 Flash Flood Watches in Kentucky, 2020 Flash Flood Watches in Indiana, 2020 Every flash flood watch in 2020

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.