Alert archive / Ohio / Flash Flood Warnings in 2021

Flash Flood Warning 29, NWS Wilmington, OH

August 26, 2021Butler County, Ohio; Franklin County, Indiana

NWS Wilmington, OH issued this flash flood warning at Aug 26, 2021, 3:31 PM EDT for Butler County, Ohio; Franklin County, Indiana. It was in force for 65 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 26, 2021, 3:31 PM EDT (19:31 UTC)
Expired
Aug 26, 2021, 4:36 PM EDT
In force
65 min
Issued by
NWS Wilmington, OH
Area
Storm-based polygon
Flood severity
None

Counties Franklin County, IN, Butler County, OH

The radar

The Cincinnati radar (KILN), 92 km from the middle of the area, began a volume at 19:33 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, 7.5 hours before the alert went out and 94 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-pSkew-T log-p diagram, Cncnati-Daytn, OH at 12:00Z on 2021-08-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1291 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cncnati-Daytn, OH at 12:00Z on 2021-08-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 5 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1291 J/kg
Mixed-layer CIN
-31 J/kg
Mixed-layer LCL
807 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
5 m²/s²
0-3 km storm-relative helicity
-4 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

616 
WGUS51 KILN 261931
FFWILN
INC047-OHC017-262215-
/O.NEW.KILN.FF.W.0029.210826T1931Z-210826T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Wilmington OH
331 PM EDT Thu Aug 26 2021

The National Weather Service in Wilmington has issued a

* Flash Flood Warning for...
  Franklin County in southeastern Indiana...
  Western Butler County in southwestern Ohio...

* Until 615 PM EDT.

* At 331 PM EDT, radar indicated thunderstorms producing heavy rain 
  in from Metamora through Oxford. Between 1.5 and 2.5 inches of 
  rain have fallen. Additional rainfall amounts of 1 to 2.5 inches 
  are possible in the warned area. Flash flooding is ongoing or 
  expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that may experience flash flooding include...
  Hamilton, Oxford, Brookville, Seven Mile, Darrtown, Reily, New 
  Miami, Blooming Grove, Metamora, Millville, Laurel, Scipio, Cedar 
  Grove, Mount Carmel, Jacksonburg, Mixersville, Sharptown, Mounds 
  State Recreation Area, St. Charles and Okeana.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to higher ground now. Act quickly to protect your life.

To report flash flooding, go to our website at weather.gov/iln and 
submit your report via social media, when you can do so safely.

&&

LAT...LON 3935 8522 3953 8521 3952 8482 3954 8482
      3954 8450 3937 8458 3934 8481

FLASH FLOOD...RADAR INDICATED

$$

JDR
1 follow-up statement
404 
WGUS71 KILN 262036
FFSILN

Flash Flood Statement
National Weather Service Wilmington OH
436 PM EDT Thu Aug 26 2021

INC047-OHC017-262046-
/O.CAN.KILN.FF.W.0029.000000T0000Z-210826T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Franklin IN-Butler OH-
436 PM EDT Thu Aug 26 2021

...FLASH FLOOD WARNING IS CANCELLED FOR FRANKLIN IN COUNTY IN 
SOUTHEASTERN INDIANA AND WESTERN BUTLER COUNTY IN SOUTHWESTERN 
OHIO...

Heavy rain has ended and flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

LAT...LON 3935 8522 3953 8521 3952 8482 3954 8482
      3954 8450 3937 8458 3934 8481

$$

JDR

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 26, 9:36 AM EDTHeat AdvisoryILNButler, Clermont, Hamilton, Warren9 hr
Aug 26, 2:26 PM EDTSpecial Weather StatementILNGreene34 min
Aug 26, 2:30 PM EDTSpecial Weather StatementILNClark30 min
Aug 26, 2:39 PM EDTAreal Flood AdvisoryILNGreene, Montgomery20 min
Aug 26, 2:41 PM EDTSpecial Weather StatementILNMontgomery34 min
Aug 26, 2:51 PM EDTSpecial Weather StatementILNClark24 min
Aug 26, 2:59 PM EDTFlash Flood WarningILNGreene, Montgomery2 hr
Aug 26, 2:59 PM EDTSpecial Weather StatementILNMontgomery31 min
Aug 26, 3:10 PM EDTSevere Thunderstorm WarningILNMontgomery17 min
Aug 26, 3:13 PM EDTAreal Flood AdvisoryILNButler18 min
Aug 26, 3:15 PM EDTSpecial Weather StatementILNButler30 min
Aug 26, 3:23 PM EDTSpecial Weather StatementILNMiami37 min
Aug 26, 3:23 PM EDTSpecial Weather StatementILNButler37 min
Aug 26, 3:33 PM EDTSpecial Weather StatementILNPreble27 min
Aug 26, 3:36 PM EDTAreal Flood AdvisoryILNClark62 min
Aug 26, 3:39 PM EDTAreal Flood AdvisoryILNButler, Preble2 hr
Aug 26, 3:50 PM EDTSpecial Weather StatementILNMiami25 min
Aug 26, 4:11 PM EDTSpecial Weather StatementILNMadison34 min
Aug 26, 4:17 PM EDTSpecial Weather StatementILNPreble28 min
Aug 26, 4:23 PM EDTSpecial Weather StatementILNMiami37 min
Aug 26, 4:27 PM EDTAreal Flood AdvisoryILNDarke, Miami, Montgomery, Preble51 min
Aug 26, 4:32 PM EDTSpecial Weather StatementILNWarren28 min
Aug 26, 4:34 PM EDTSpecial Weather StatementILNUnion26 min
Aug 26, 4:41 PM EDTSpecial Weather StatementILNDarke34 min
Aug 26, 4:51 PM EDTAreal Flood AdvisoryILNWarren75 min
Aug 26, 4:54 PM EDTSpecial Weather StatementILNChampaign36 min
Aug 26, 5:21 PM EDTSpecial Weather StatementILNMercer24 min
Aug 26, 5:50 PM EDTSpecial Weather StatementILNHighland25 min
Aug 26, 5:54 PM EDTAreal Flood AdvisoryILNClermont40 min
Aug 26, 5:54 PM EDTSpecial Weather StatementILNRoss36 min
Aug 26, 6:00 PM EDTSpecial Weather StatementILNAdams, Brown30 min
Aug 26, 6:31 PM EDTAreal Flood AdvisoryILNAdams21 min
Aug 26, 6:31 PM EDTSpecial Weather StatementILNAdams29 min
Aug 26, 6:52 PM EDTFlash Flood WarningILNAdams98 min
Aug 26, 2:22 PM EDTSpecial Weather StatementILNFranklin23 min
Aug 26, 2:47 PM EDTSpecial Weather StatementILNFranklin28 min
Aug 26, 4:37 PM EDTSpecial Weather StatementILNOhio23 min
Aug 26, 4:46 PM EDTAreal Flood AdvisoryILNDearborn, Ohio69 min

Nearby

Flash Flood Warnings in Ohio, 2021Flash Flood Warnings in Indiana, 2021Every flash flood warning in 2021

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.