Alert archive / Ohio / Flash Flood Warnings in 2021

Flash Flood Warning 2, NWS Wilmington, OH

June 3, 2021Union County, Ohio

NWS Wilmington, OH issued this flash flood warning at Jun 3, 2021, 7:14 PM EDT for Union County, Ohio. It was in force for 76 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: Jun 3, 2021, 7:14 PM EDT (23:14 UTC)
Expired: Jun 3, 2021, 8:30 PM EDT
In force: 76 min
Issued by: NWS Wilmington, OH
Area: Storm-based polygon
Flood severity: None

County Union County, OH

The radar

The Cincinnati radar (KILN), 93 km from the middle of the area, began a volume at 23:17 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, 11.2 hours before the alert went out and 91 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: 455 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 492 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 73 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

As transmitted.

568 
WGUS51 KILN 032314
FFWILN
OHC159-040115-
/O.NEW.KILN.FF.W.0002.210603T2314Z-210604T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Wilmington OH
714 PM EDT Thu Jun 3 2021

The National Weather Service in Wilmington has issued a

* Flash Flood Warning for...
  Southeastern Union County in central Ohio...

* Until 915 PM EDT.

* At 714 PM EDT, radar indicated thunderstorms producing heavy rain 
  across the warned area. Between 2 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...
  Dublin, Marysville, Plain City, New California, Unionville Center, 
  US Route 33 at US Route 42 and Chuckery.

Additional rainfall amounts of 0.5 to 1.5 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

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 4011 8339 4018 8338 4020 8326 4020 8317
      4011 8317

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...0.5-1.5 INCHES IN 1 HOUR 

$$

1 follow-up statement

000 
WGUS71 KILN 040030
FFSILN

Flash Flood Statement
National Weather Service Wilmington OH
830 PM EDT Thu Jun 3 2021

OHC159-040040-
/O.CAN.KILN.FF.W.0002.000000T0000Z-210604T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Union OH-
830 PM EDT Thu Jun 3 2021

...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHEASTERN UNION OH COUNTY 
IN CENTRAL OHIO...

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

LAT...LON 4011 8339 4018 8338 4020 8326 4020 8317
      4011 8317

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 3, 2:21 PM EDT	Flash Flood Warning	ILN	Butler, Preble	3 hr
Jun 3, 3:48 PM EDT	Areal Flood Advisory	ILN	Butler	102 min
Jun 3, 4:49 PM EDT	Special Weather Statement	ILN	Pike	26 min
Jun 3, 4:51 PM EDT	Special Weather Statement	ILN	Ross	24 min
Jun 3, 5:17 PM EDT	Areal Flood Advisory	ILN	Union	117 min
Jun 3, 5:27 PM EDT	Areal Flood Warning	ILN	Butler, Preble	2 hr

Nearby

Flash Flood Warnings in Ohio, 2021 Every 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.