Alert archive / Ohio / Flash Flood Warnings in 2021

Flash Flood Warning 30, NWS Wilmington, OH

August 26, 2021Adams County, Ohio

NWS Wilmington, OH issued this flash flood warning at Aug 26, 2021, 6:52 PM EDT for Adams County, Ohio. It was in force for 98 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Aug 26, 2021, 6:52 PM EDT (22:52 UTC)
Expired
Aug 26, 2021, 8:30 PM EDT
In force
98 min
Issued by
NWS Wilmington, OH
Area
Storm-based polygon
Flood severity
None

County Adams County, OH

The radar

The Cincinnati radar (KILN), 65 km from the middle of the area, began a volume at 22:53 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.

What was reported inside it

TimeReportWhereRemark
Aug 26, 7:31 PM EDTFLASH FLOODWest Union, OHHIGH WATER REPORTED ON SEVERAL ROADS. DEPTH UNKNOWN.
Aug 26, 7:39 PM EDTHEAVY RAIN 2.54Se West Union, OHSTORM TOTAL FOR THE DAY THUS FAR. TAKEN FROM A PERSONAL WEATHER STATION.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 10.9 hours before the alert went out and 65 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.

563 
WGUS51 KILN 262252
FFWILN
OHC001-270030-
/O.NEW.KILN.FF.W.0030.210826T2252Z-210827T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Wilmington has issued a

* Flash Flood Warning for...
  Adams County in southwestern Ohio...

* Until 830 PM EDT.

* At 652 PM EDT, radar indicated thunderstorms producing heavy rain 
  across the warned area. Between 2 and 2.5 inches of rain have 
  fallen. Additional rainfall amounts of 1 to 1.5 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, streets
           and underpasses as well as other poor drainage and
           low-lying areas.

* Some locations that may experience flash flooding include...
  West Union, Manchester, Peebles, Winchester, Seaman, Emerald, 
  Cherry Fork, Dunkinsville, State Route 348 at State Route 125, 
  Cedar Mills, Bentonville, May Hill, Serpent Mound, Locust Grove 
  and Bradysville.

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 3902 8367 3902 8361 3906 8339 3905 8336
      3899 8336 3867 8342 3868 8347 3871 8351
      3867 8370

FLASH FLOOD...RADAR INDICATED

$$

JDR
1 follow-up statement
784 
WGUS71 KILN 270023
FFSILN

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

OHC001-270033-
/O.EXP.KILN.FF.W.0030.000000T0000Z-210827T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Adams OH-
823 PM EDT Thu Aug 26 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 830 PM EDT THIS EVENING FOR 
ADAMS COUNTY...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

LAT...LON 3902 8367 3902 8361 3906 8339 3905 8336
      3899 8336 3867 8342 3868 8347 3871 8351
      3867 8370

$$

Hickman

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, 3:31 PM EDTFlash Flood WarningILNButler65 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

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.