Alert archive / Ohio / Flash Flood Warnings in 2020

Flash Flood Warning 21, NWS Wilmington, OH

May 24, 2020Brown County, Clermont County, Ohio

NWS Wilmington, OH issued this flash flood warning at May 24, 2020, 5:58 PM EDT for Brown County, Clermont County, Ohio. It was in force for 2 hr. 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: May 24, 2020, 5:58 PM EDT (21:58 UTC)
Expired: May 24, 2020, 8:00 PM EDT
In force: 2 hr
Issued by: NWS Wilmington, OH
Area: Storm-based polygon
Flood severity: None

Counties Brown County, OH, Clermont County, OH

The radar

The Cincinnati radar (KILN), 71 km from the middle of the area, began a volume at 22:00 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

Time	Report	Where	Remark
May 24, 6:55 PM EDT	HEAVY RAIN 1.42	4 Nnw Felicity, OH	STORM TOTAL RAINFALL THUS FAR.
May 24, 7:23 PM EDT	FLASH FLOOD	4 Nnw Augusta, OH	HIGH WATER ON SKIFFSVILLE ROAD

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, 10.0 hours before the alert went out and 72 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: 122 J/kg
Mixed-layer CIN: -84 J/kg
Mixed-layer LCL: 1119 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 121 m²/s²
0-3 km storm-relative helicity: 67 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

104 
WGUS51 KILN 242158
FFWILN
OHC015-025-250000-
/O.NEW.KILN.FF.W.0021.200524T2158Z-200525T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Wilmington OH
558 PM EDT Sun May 24 2020

The National Weather Service in Wilmington has issued a

* Flash Flood Warning for...
  Southeastern Clermont County in southwestern Ohio...
  West central Brown County in southwestern Ohio...

* Until 800 PM EDT.

* At 558 PM EDT, radar indicated thunderstorms producing heavy rain 
  across the warned area. Radar estimates of up to 2 inches of rain 
  have already fallen, with another 1 to 2 inches possible. Flash 
  flooding is ongoing or expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar indicated.

  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 flooding include...
  Felicity, Hamersville, Higginsport, Neville, Chilo, Point Isabel,
  Feesburg, Saltair and Utopia.

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 3878 8411 3880 8415 3880 8420 3883 8423
      3895 8413 3895 8394 3879 8394 3879 8398
      3877 8405 3877 8407

FLASH FLOOD...RADAR INDICATED

$$

KC

1 follow-up statement

793 
WGUS71 KILN 242358
FFSILN

Flash Flood Statement
National Weather Service Wilmington OH
758 PM EDT Sun May 24 2020

OHC015-025-250008-
/O.EXP.KILN.FF.W.0021.000000T0000Z-200525T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Clermont OH-Brown OH-
758 PM EDT Sun May 24 2020

...THE FLASH FLOOD WARNING FOR SOUTHEASTERN CLERMONT AND WEST CENTRAL
BROWN COUNTIES WILL EXPIRE AT 800 PM EDT...

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

LAT...LON 3878 8411 3880 8415 3880 8420 3883 8423
      3895 8413 3895 8394 3879 8394 3879 8398
      3877 8405 3877 8407

$$

McGinnis

The office that day

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

Issued	Product	Office	Counties	Lasted
May 23, 8:51 PM EDT	Special Weather Statement	ILN	Pike	24 min
May 23, 9:37 PM EDT	Special Weather Statement	ILN	Pike	38 min
May 24, 4:05 PM EDT	Severe Thunderstorm Warning	ILN	Clermont	40 min
May 24, 4:42 PM EDT	Severe Thunderstorm Warning	ILN	Hamilton	22 min
May 24, 4:47 PM EDT	Areal Flood Advisory	ILN	Hamilton	118 min
May 24, 5:37 PM EDT	Areal Flood Advisory	ILN	Brown, Clermont	22 min

Nearby

Flash Flood Warnings in Ohio, 2020 Every flash flood warning in 2020

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.