Alert archive / Ohio / Flash Flood Watches in 2017

Flash Flood Watch 1, NWS Wilmington, OH

February 28, 201718 counties in Ohio; 12 counties in Kentucky; 7 counties in Indiana

NWS Wilmington, OH issued this flash flood watch at Feb 28, 2017, 11:21 AM EST for 18 counties in Ohio; 12 counties in Kentucky; 7 counties in Indiana. It was in force for 23 hr.

The area

The counties it named.

The facts

Issued: Feb 28, 2017, 11:21 AM EST (16:21 UTC)
Expired: Mar 1, 2017, 10:26 AM EST
In force: 23 hr
Issued by: NWS Wilmington, OH
Flood severity: None

All 37 counties

Dearborn County, IN, Fayette County, IN, Franklin County, IN, Ohio County, IN, Ripley County, IN, Switzerland County, IN, Union 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, Clermont County, OH, Clinton County, OH, Fairfield County, OH, Fayette County, OH, Greene County, OH, Hamilton County, OH, Highland County, OH, Hocking County, OH, Montgomery County, OH, Pickaway County, OH, Pike County, OH, Preble County, OH, Ross County, OH, Scioto County, OH, Warren County, OH

The radar

The Cincinnati radar (KILN), 44 km from the middle of the area, began a volume at 16:23 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

Cncnati-Daytn, OH (KILN), launched 12:00Z, 4.4 hours before the alert went out and 46 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: 1201 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 307 m²/s²
0-3 km storm-relative helicity: 253 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 Feb 28, 10:01 AM EST, 1 hour 20 minutes earlier.

Area forecast discussion, Feb 28, 10:01 AM EST, 1 hour 20 minutes before

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Hazardous weather outlook, Feb 28, 5:23 AM EST, 5 hours 58 minutes before

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Nearby

Flash Flood Watches in Ohio, 2017 Flash Flood Watches in Kentucky, 2017 Flash Flood Watches in Indiana, 2017 Every flash flood watch 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.