Alert archive / Ohio / Flash Flood Warnings in 2021

Flash Flood Warning 10, NWS Wilmington, OH

June 18, 2021Butler County, Montgomery County, Warren County, Ohio

NWS Wilmington, OH issued this flash flood warning at Jun 18, 2021, 9:26 PM EDT for Butler County, Montgomery County, Warren County, Ohio. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jun 18, 2021, 9:26 PM EDT (01:26 UTC)
Expired
Jun 19, 2021, 12:30 AM EDT
In force
3 hr
Issued by
NWS Wilmington, OH
Area
Storm-based polygon
Flood severity
None

Counties Butler County, OH, Montgomery County, OH, Warren County, OH

The radar

The Cincinnati radar (KILN), 40 km from the middle of the area, began a volume at 01:27 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 00:00Z, 1.4 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-pSkew-T log-p diagram, Cncnati-Daytn, OH at 00:00Z on 2021-06-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2257 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 00:00Z on 2021-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 214 square meters per square second.19395878Sfc1 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
2257 J/kg
Mixed-layer CIN
-56 J/kg
Mixed-layer LCL
1236 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
214 m²/s²
0-3 km storm-relative helicity
240 m²/s²
Significant tornado parameter
1.9
Supercell composite
17.6

Open this sounding in Storm Lab

The text

As transmitted.

199 
WGUS51 KILN 190126
FFWILN
OHC017-113-165-190430-
/O.NEW.KILN.FF.W.0010.210619T0126Z-210619T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Wilmington OH
926 PM EDT Fri Jun 18 2021

The National Weather Service in Wilmington has issued a

* Flash Flood Warning for...
  Northeastern Butler County in southwestern Ohio...
  Northern Warren County in southwestern Ohio...
  Southern Montgomery County in west central Ohio...

* Until 1230 AM EDT.

* At 926 PM EDT, radar indicated thunderstorms producing heavy rain 
  across the warned area. Between 1 and 3 inches of rain have 
  fallen. Flash flooding is ongoing or expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flooding of small creeks and streams, urban areas,
           highways, streets and underpasses as well as other
           drainage and low lying areas.

* Some locations that may experience flash flooding include...
  Dayton, Kettering, Middletown, Miamisburg, Lebanon, Springboro, 
  Franklin, Bellbrook, Moraine, Carlisle, West Carrollton, 
  Waynesville, Hunter, Germantown, New Lebanon, Farmersville, 
  Corwin, Centerville, Five Points and State Route 48 at State Route 
  73.

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 3959 8447 3976 8447 3965 8411 3958 8411
      3958 8407 3947 8402 3943 8415

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR 

$$

ch
1 follow-up statement
627 
WGUS71 KILN 190434
FFSILN

Flash Flood Statement
National Weather Service Wilmington OH
1234 AM EDT Sat Jun 19 2021

OHC017-113-165-190444-
/O.EXP.KILN.FF.W.0010.000000T0000Z-210619T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Butler OH-Montgomery OH-Warren OH-
1234 AM EDT Sat Jun 19 2021

...FLASH FLOOD WARNING HAS EXPIRED FOR NORTHEASTERN BUTLER, NORTHERN 
WARREN AND SOUTHERN MONTGOMERY COUNTIES...

Heavy rain has ended but scattered showers and thunderstorms will 
move back over the area through the night. This may lead to renewed 
flooding over portions of the area.

A Flash Flood Watch remains in effect until 1200 PM EDT Saturday for 
portions of Indiana...Northern Kentucky and Ohio.

LAT...LON 3959 8447 3976 8447 3965 8411 3958 8411
      3958 8407 3947 8402 3943 8415

$$

Binau

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 18, 8:10 PM EDTSevere Thunderstorm WarningILNButler, Hamilton50 min
Jun 18, 8:11 PM EDTFlash Flood WarningILNGreene, Montgomery3 hr
Jun 18, 8:11 PM EDTSevere Thunderstorm WarningILNGreene, Montgomery34 min
Jun 18, 8:14 PM EDTSevere Thunderstorm WarningILNMontgomery, Preble31 min
Jun 18, 8:18 PM EDTSevere Thunderstorm WarningILNClinton, Greene, Warren42 min
Jun 18, 8:33 PM EDTTornado WarningILNGreene, Montgomery, Warren27 min
Jun 18, 8:39 PM EDTSevere Thunderstorm WarningILNButler, Hamilton, Montgomery, Preble, Warren36 min
Jun 18, 8:46 PM EDTTornado Warning Tornado observedILNButler, Montgomery, Warren29 min
Jun 18, 8:51 PM EDTSevere Thunderstorm WarningILNClinton, Fayette, Highland39 min
Jun 18, 9:09 PM EDTSevere Thunderstorm WarningILNAdams, Brown, Clinton, Highland51 min
Jun 18, 9:11 PM EDTTornado WarningILNHamilton34 min
Jun 18, 9:15 PM EDTSevere Thunderstorm WarningILNBrown, Butler, Clermont, Clinton, Hamilton, Warren45 min
Jun 18, 9:16 PM EDTFlash Flood WarningILNClinton, Greene, Warren3 hr
Jun 18, 9:32 PM EDTFlash Flood WarningILNClinton, Highland, Pike3 hr
Jun 18, 9:39 PM EDTAreal Flood AdvisoryILNHamilton3 hr
Jun 18, 9:49 PM EDTSevere Thunderstorm WarningILNAdams, Brown, Clermont, Pike, Scioto56 min
Jun 18, 10:34 PM EDTSevere Thunderstorm WarningILNAdams, Scioto41 min
Jun 18, 10:58 PM EDTSpecial Weather StatementILNButler, Warren32 min
Jun 18, 11:03 PM EDTSevere Thunderstorm WarningILNButler, Clermont, Hamilton, Warren42 min
Jun 18, 11:15 PM EDTAreal Flood WarningILNGreene, Montgomery6 hr
Jun 18, 11:21 PM EDTRiver Flood WarningILNGreene, Warren20 hr
Jun 18, 11:43 PM EDTSevere Thunderstorm WarningILNBrown, Clermont, Clinton, Highland, Warren19 min
Jun 19, 12:01 AM EDTSevere Thunderstorm WarningILNDarke27 min
Jun 19, 12:12 AM EDTAreal Flood AdvisoryILNWarren3 hr
Jun 19, 12:19 AM EDTSpecial Weather StatementILNMiami26 min
Jun 19, 12:23 AM EDTSpecial Weather StatementILNPreble37 min
Jun 19, 12:33 AM EDTAreal Flood WarningILNClinton, Greene, Warren6 hr
Jun 19, 1:12 AM EDTAreal Flood AdvisoryILNDarke, Preble2 hr
Jun 19, 1:55 AM EDTSpecial Weather StatementILNMontgomery35 min
Jun 19, 2:33 AM EDTAreal Flood AdvisoryILNButler, Clinton, Darke, Greene, Montgomery, Preble and 1 more3 hr
Jun 19, 3:04 AM EDTFlash Flood WarningILNClinton, Warren2 hr
Jun 19, 3:28 AM EDTAreal Flood AdvisoryILNBrown, Clinton, Highland3 hr
Jun 19, 6:39 AM EDTAreal Flood AdvisoryILNHamilton19 min
Jun 19, 6:54 AM EDTFlash Flood WarningILNHamilton13 hr
Jun 19, 8:12 AM EDTRiver Flood WarningILNHamilton4 hr
Jun 19, 8:16 AM EDTAreal Flood AdvisoryILNButler, Hamilton5 hr
Jun 19, 8:46 AM EDTSpecial Weather StatementILNClermont44 min
Jun 19, 9:08 AM EDTAreal Flood AdvisoryILNBrown, Clermont, Highland3 hr
Jun 19, 9:28 AM EDTRiver Flood WarningILNWarren10 hr
Jun 19, 9:29 AM EDTRiver Flood WarningILNClermont, Hamilton24 hr
Jun 19, 1:18 PM EDTRiver Flood AdvisoryILNHamilton9 hr

Nearby

Flash Flood Warnings in Ohio, 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.