Alert archive / Ohio / Flash Flood Warnings in 2021

Flash Flood Warning 18, NWS Wilmington, OH

July 1, 2021Brown County, Clermont County, Ohio; Bracken County, Pendleton County, Kentucky

NWS Wilmington, OH issued this flash flood warning at Jul 1, 2021, 3:27 AM EDT for Brown County, Clermont County, Ohio; Bracken County, Pendleton County, Kentucky. 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: Jul 1, 2021, 3:27 AM EDT (07:27 UTC)
Expired: Jul 1, 2021, 6:30 AM EDT
In force: 3 hr
Issued by: NWS Wilmington, OH
Area: Storm-based polygon
Flood severity: None

Counties Bracken County, KY, Pendleton County, KY, Brown County, OH, Clermont County, OH

The radar

The Cincinnati radar (KILN), 74 km from the middle of the area, began a volume at 07:26 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, 7.5 hours before the alert went out and 76 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: 1557 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 768 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 53 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

857 
WGUS51 KILN 010727
FFWILN
KYC023-191-OHC015-025-011030-
/O.NEW.KILN.FF.W.0018.210701T0727Z-210701T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Wilmington OH
327 AM EDT Thu Jul 1 2021

The National Weather Service in Wilmington has issued a

* Flash Flood Warning for...
  Northern Bracken County in northern Kentucky...
  Northern Pendleton County in northern Kentucky...
  Southern Brown County in southwestern Ohio...
  Southeastern Clermont County in southwestern Ohio...

* Until 630 AM EDT.

* At 327 AM EDT, radar and automated rain gauges indicated 
  thunderstorms producing heavy rain across the warned area. Between 
  1 and 2 inches of rain have fallen. Flash flooding is ongoing or 
  expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar and automated gauges.

  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...
  Georgetown, Augusta, Felicity, Butler, Neville, Higginsport, 
  Decatur, Russellville, Moscow, Chilo, Rock Springs, Bradford, 
  Utopia, Willow Grove, Johnsville, Point Isabel, Foster and 
  Feesburg.

Additional rainfall amounts of 1 to 2 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

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 3879 8453 3881 8441 3890 8412 3890 8368
      3879 8369 3877 8390 3876 8391 3868 8451

FLASH FLOOD...RADAR AND GAUGE INDICATED

$$

Franks

1 follow-up statement

772 
WGUS71 KILN 011023
FFSILN

Flash Flood Statement
National Weather Service Wilmington OH
623 AM EDT Thu Jul 1 2021

KYC023-191-OHC015-025-011033-
/O.EXP.KILN.FF.W.0018.000000T0000Z-210701T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bracken KY-Pendleton KY-Brown OH-Clermont OH-
623 AM EDT Thu Jul 1 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 630 AM EDT THIS MORNING FOR 
NORTHERN BRACKEN, NORTHERN PENDLETON, SOUTHERN BROWN AND 
SOUTHEASTERN CLERMONT COUNTIES...

The heaviest rain which led to flash flooding concerns has ended. 
However, additional rainfall through the morning on top of saturated 
grounds may cause renewed flooding through the morning hours. 
Therefore, the Flash Flood Warning has been replaced with a Flood 
Advisory. Please continue to heed remaining road closures.

A Flash Flood Watch remains in effect until 800 PM EDT Thursday for 
portions of Indiana...Kentucky and Ohio.

LAT...LON 3879 8453 3881 8441 3890 8412 3890 8368
      3879 8369 3877 8390 3876 8391 3868 8451

$$

KC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 8:26 PM EDT	Flash Flood Warning	ILN	Hamilton	3 hr
Jun 30, 8:31 PM EDT	Special Weather Statement	ILN	Scioto	29 min
Jun 30, 9:30 PM EDT	Areal Flood Advisory	ILN	Butler	104 min
Jun 30, 10:13 PM EDT	River Flood Warning	ILN	Hamilton	4 hr
Jun 30, 10:17 PM EDT	Areal Flood Advisory	ILN	Hamilton	10 hr
Jun 30, 10:39 PM EDT	Flash Flood Warning	ILN	Hamilton	3 hr
Jun 30, 10:42 PM EDT	Areal Flood Advisory	ILN	Clermont	2 hr
Jun 30, 11:23 PM EDT	Areal Flood Advisory	ILN	Hamilton	9 hr
Jul 1, 1:02 AM EDT	Flash Flood Watch	ILN	Adams, Brown, Butler, Clermont, Clinton, Hamilton and 6 more	19 hr
Jul 1, 3:08 AM EDT	Areal Flood Advisory	ILN	Delaware, Franklin, Licking	5 hr
Jul 1, 3:23 AM EDT	Special Weather Statement	ILN	Franklin	37 min
Jul 1, 3:42 AM EDT	Flash Flood Warning	ILN	Delaware	2 hr
Jul 1, 3:56 AM EDT	Areal Flood Advisory	ILN	Adams, Brown	4 hr
Jul 1, 4:16 AM EDT	Areal Flood Advisory	ILN	Scioto	4 hr
Jul 1, 5:16 AM EDT	Areal Flood Advisory	ILN	Darke, Preble	3 hr
Jul 1, 6:20 AM EDT	Areal Flood Advisory	ILN	Brown, Clermont	115 min
Jul 1, 12:28 AM EDT	Areal Flood Advisory	ILN	Bracken, Mason, Robertson	6 hr
Jul 1, 1:06 AM EDT	Areal Flood Advisory	ILN	Campbell, Kenton	7 hr
Jul 1, 3:19 AM EDT	Areal Flood Advisory	ILN	Boone, Campbell, Gallatin, Grant, Kenton	3 hr

Nearby

Flash Flood Warnings in Ohio, 2021 Flash Flood Warnings in Kentucky, 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.