Alert archive / Ohio / Flood Watches in 2026

Flood Watch 13, NWS Wilmington, OH

August 19, 202621 counties in Ohio; Fayette County, Union County, Wayne County, Indiana

NWS Wilmington, OH issued this flood watch at Aug 19, 2026, 12:40 PM EDT for 21 counties in Ohio; Fayette County, Union County, Wayne County, Indiana. It took effect at Aug 19, 2026, 4:00 PM EDT. It was in force for 18 hr.

The area

The counties it named.

The facts

Issued: Aug 19, 2026, 12:40 PM EDT (16:40 UTC)
In effect from: Aug 19, 2026, 4:00 PM EDT
Expired: Aug 20, 2026, 10:00 AM EDT
In force: 18 hr
Issued by: NWS Wilmington, OH
Flood severity: None

All 24 counties

Fayette County, IN, Union County, IN, Wayne County, IN, Auglaize County, OH, Champaign County, OH, Clark County, OH, Darke County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Greene County, OH, Hardin County, OH, Hocking County, OH, Licking County, OH, Logan County, OH, Madison County, OH, Mercer County, OH, Miami County, OH, Montgomery County, OH, Pickaway County, OH, Preble County, OH, Shelby County, OH, Union County, OH

The radar

The Cincinnati radar (KILN), 65 km from the middle of the area, began a volume at 16:43 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, 4.7 hours before the alert went out and 64 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: 12 J/kg
Mixed-layer CIN: -89 J/kg
Mixed-layer LCL: 906 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 72 m²/s²
0-3 km storm-relative helicity: 137 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 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 flood watch went out at Aug 19, 6:46 AM EDT, 5 hours 54 minutes earlier.

Area forecast discussion, Aug 19, 6:46 AM EDT, 5 hours 54 minutes before

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Hazardous weather outlook, Aug 19, 3:21 AM EDT, 9 hours 19 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 19, 3:47 PM EDT	Areal Flood Advisory	ILN	Logan, Union	6 hr
Aug 19, 3:55 PM EDT	Areal Flood Advisory	ILN	Mercer	5 hr
Aug 19, 4:25 PM EDT	Areal Flood Advisory	ILN	Auglaize, Logan, Shelby	6 hr
Aug 19, 4:26 PM EDT	Special Weather Statement	ILN	Logan, Shelby	34 min
Aug 19, 4:53 PM EDT	Flash Flood Warning	ILN	Logan, Shelby	3 hr
Aug 19, 4:55 PM EDT	Special Weather Statement	ILN	Logan	35 min
Aug 19, 5:05 PM EDT	Areal Flood Advisory	ILN	Delaware	4 hr
Aug 19, 5:31 PM EDT	Special Weather Statement	ILN	Union	29 min
Aug 19, 5:38 PM EDT	Flash Flood Warning	ILN	Shelby	3 hr
Aug 19, 5:52 PM EDT	Areal Flood Advisory	ILN	Delaware	3 hr
Aug 19, 6:18 PM EDT	Flash Flood Warning	ILN	Delaware	66 min
Aug 19, 7:04 PM EDT	Flash Flood Warning Considerable damage threat	ILN	Logan, Shelby	105 min

Nearby

Flood Watches in Ohio, 2026 Flood Watches in Indiana, 2026 Every flood watch in 2026

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.