Alert archive / Ohio / Flash Flood Warnings in 2023

Flash Flood Warning 2, NWS Cleveland, OH

July 2, 2023Knox County, Ohio

NWS Cleveland, OH issued this flash flood warning at Jul 2, 2023, 7:59 PM EDT for Knox 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: Jul 2, 2023, 7:59 PM EDT (23:59 UTC)
Expired: Jul 2, 2023, 10:30 PM EDT
In force: 3 hr
Issued by: NWS Cleveland, OH
Area: Storm-based polygon
Flood severity: None

County Knox County, OH

The radar

The Cleveland radar (KCLE), 128 km from the middle of the area, began a volume at 00:02 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, 12.0 hours before the alert went out and 152 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: 35 J/kg
Mixed-layer CIN: -96 J/kg
Mixed-layer LCL: 653 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 174 m²/s²
0-3 km storm-relative helicity: 190 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

355 
WGUS51 KCLE 022359
FFWCLE
OHC083-030230-
/O.NEW.KCLE.FF.W.0002.230702T2359Z-230703T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Cleveland OH
759 PM EDT Sun Jul 2 2023

The National Weather Service in Cleveland has issued a

* Flash Flood Warning for...
  Knox County in north central Ohio...

* Until 1030 PM EDT.

* At 759 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2.0 and 3.0 inches of 
  rain have fallen. Additional rainfall amounts of 0.5 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, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Mount Vernon, Fredericktown, Gambier, Centerburg, Danville, 
  Martinsburg, Gann, North Liberty and Bladensburg.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4044 8264 4055 8239 4057 8218 4029 8219
      4024 8238 4025 8248 4026 8248 4028 8275
      4035 8274 4035 8264

FLASH FLOOD...RADAR INDICATED

$$

Campbell

1 follow-up statement

020 
WGUS71 KCLE 030236
FFSCLE

Flash Flood Statement
National Weather Service Cleveland OH
1036 PM EDT Sun Jul 2 2023

OHC083-030246-
/O.EXP.KCLE.FF.W.0002.000000T0000Z-230703T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Knox OH-
1036 PM EDT Sun Jul 2 2023

...FLASH FLOOD WARNING HAS EXPIRED FOR KNOX COUNTY...

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

LAT...LON 4044 8264 4055 8239 4057 8218 4029 8219
      4024 8238 4025 8248 4026 8248 4028 8275
      4035 8274 4035 8264

$$

26

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 2, 1:57 AM EDT	Special Weather Statement	CLE	Crawford, Knox, Marion, Morrow, Richland, Seneca and 1 more	63 min
Jul 2, 2:57 AM EDT	Special Weather Statement	CLE	Ashland, Holmes, Knox, Medina, Richland, Wayne	48 min
Jul 2, 3:22 PM EDT	Special Weather Statement	CLE	Wyandot	38 min
Jul 2, 3:43 PM EDT	Special Weather Statement	CLE	Marion	47 min
Jul 2, 4:20 PM EDT	Special Weather Statement	CLE	Crawford	40 min
Jul 2, 4:43 PM EDT	Special Weather Statement	CLE	Knox	47 min
Jul 2, 4:54 PM EDT	Special Weather Statement	CLE	Ashland, Richland	51 min
Jul 2, 5:05 PM EDT	Special Weather Statement	CLE	Lucas	25 min
Jul 2, 5:10 PM EDT	Severe Thunderstorm Warning	CLE	Knox, Morrow	50 min
Jul 2, 5:14 PM EDT	Tornado Warning	CLE	Lucas, Ottawa	31 min
Jul 2, 5:25 PM EDT	Special Marine Warning	CLE		95 min
Jul 2, 5:32 PM EDT	Special Weather Statement	CLE	Ashland, Wayne	43 min
Jul 2, 5:47 PM EDT	Special Weather Statement	CLE	Ottawa	43 min
Jul 2, 6:10 PM EDT	Special Weather Statement	CLE	Holmes, Knox	50 min
Jul 2, 6:18 PM EDT	Severe Thunderstorm Warning	CLE	Ottawa	57 min
Jul 2, 6:27 PM EDT	Special Marine Warning	CLE		93 min
Jul 2, 6:29 PM EDT	Areal Flood Advisory	CLE	Knox	90 min
Jul 2, 7:01 PM EDT	Special Weather Statement	CLE	Marion, Morrow	44 min
Jul 2, 7:11 PM EDT	Special Marine Warning	CLE		94 min
Jul 2, 7:19 PM EDT	Special Weather Statement	CLE	Stark	41 min
Jul 2, 7:41 PM EDT	Special Weather Statement	CLE	Knox	34 min
Jul 2, 7:41 PM EDT	Special Weather Statement	CLE	Lorain	64 min

Nearby

Flash Flood Warnings in Ohio, 2023 Every flash flood warning in 2023

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.