Alert archive / Ohio / Flash Flood Warnings in 2020

Flash Flood Warning 18, NWS Cleveland, OH

September 7, 20204 counties in Ohio

NWS Cleveland, OH issued this flash flood warning at Sep 7, 2020, 1:50 PM EDT for 4 counties in Ohio. It was in force for 4 hr. 12 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: Sep 7, 2020, 1:50 PM EDT (17:50 UTC)
Expired: Sep 7, 2020, 5:45 PM EDT
In force: 4 hr
Issued by: NWS Cleveland, OH
Area: Storm-based polygon
Flood severity: None

Counties Lorain County, OH, Medina County, OH, Portage County, OH, Summit County, OH

The radar

The Cleveland radar (KCLE), 32 km from the middle of the area, began a volume at 17:52 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
Sep 7, 2:11 PM EDT	HEAVY RAIN 4.01	3 Ne Medina, OH
Sep 7, 2:34 PM EDT	HEAVY RAIN 3.02	1 W Medina, OH
Sep 7, 3:15 PM EDT	HEAVY RAIN 3.51	4 N Medina, OH	STORM TOTAL RAINFALL.
Sep 7, 3:32 PM EDT	HEAVY RAIN 3.12	E Ravenna, OH	TOTAL RAINFALL AS OF 330 PM
Sep 7, 4:00 PM EDT	HEAVY RAIN 4.77	1 Ene Medina, OH	12 HOUR STORM TOTAL.
Sep 7, 4:57 PM EDT	FLOOD	1 Sw Silver Lake, OH	ROUTE 8. NORTH CLOSED AT PERKINS (59).
Sep 7, 5:00 PM EDT	FLOOD	2 W Streetsboro, OH	EB/WB RT 303 CLOSED BETWEEN STONE RD AND JEFFERSON ST.
Sep 7, 5:00 PM EDT	HEAVY RAIN 1.89	Munroe Falls, OH	MESONET STATION MRFO1 MUNROE FALLS.
Sep 7, 5:00 PM EDT	HEAVY RAIN 3.5	2 S Cuyahoga Falls, OH
Sep 7, 5:30 PM EDT	HEAVY RAIN 5.09	1 Ene Medina, OH
Sep 7, 5:46 PM EDT	HEAVY RAIN 3.55	3 Ese Brunswick, OH	12 HOUR TOTAL.
Sep 7, 5:55 PM EDT	HEAVY RAIN 4.33	1 W Medina, OH

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

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 5.8 hours before the alert went out and 155 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1916 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 213 m²/s²
0-3 km storm-relative helicity: 237 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

497 
WGUS51 KCLE 071750
FFWCLE
OHC093-103-133-153-072145-
/O.NEW.KCLE.FF.W.0018.200907T1750Z-200907T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Cleveland OH
150 PM EDT Mon Sep 7 2020

The National Weather Service in Cleveland has issued a

* Flash Flood Warning for...
  Southern Lorain County in north central Ohio...
  Central Medina County in northeastern Ohio...
  Portage County in northeastern Ohio...
  Northern Summit County in northeastern Ohio...

* Until 545 PM EDT.

* At 150 PM EDT, Doppler radar and automated rain gauges indicated 
  thunderstorms producing heavy rain across the warned area. Between 
  2 and 4 inches of rain have fallen. Flash flooding is ongoing or 
  expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Doppler 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 will experience flash flooding include...
  Akron, Medina, Ravenna, Cuyahoga Falls, Brunswick, Kent, 
  Barberton, Hudson, Tallmadge, Streetsboro, Wellington, Mogadore, 
  Garrettsville, Mantua, Stow, Aurora, Norton, Brimfield, Hinckley 
  and Fairlawn.

Additional rainfall amounts of 1 to 2 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.

&&

LAT...LON 4114 8233 4121 8234 4127 8139 4135 8139
      4135 8100 4113 8100 4106 8126 4104 8158
      4108 8169

FLASH FLOOD...RADAR AND GAUGE INDICATED

$$

Greenawalt

1 follow-up statement

443 
WGUS71 KCLE 072142
FFSCLE

Flash Flood Statement
National Weather Service Cleveland OH
542 PM EDT Mon Sep 7 2020

OHC093-103-133-153-072152-
/O.EXP.KCLE.FF.W.0018.000000T0000Z-200907T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lorain OH-Medina OH-Portage OH-Summit OH-
542 PM EDT Mon Sep 7 2020

...FLASH FLOOD WARNING WILL EXPIRE AT 545 PM EDT THIS AFTERNOON FOR 
SOUTHERN LORAIN, CENTRAL MEDINA, PORTAGE AND NORTHERN SUMMIT 
COUNTIES...

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

LAT...LON 4114 8233 4121 8234 4127 8139 4135 8139
      4135 8100 4113 8100 4106 8126 4104 8158
      4108 8169

$$

Greenawalt

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 7, 5:00 AM EDT	Special Marine Warning	CLE		90 min
Sep 7, 6:39 AM EDT	Special Weather Statement	CLE	Erie	51 min
Sep 7, 6:57 AM EDT	Special Weather Statement	CLE	Cuyahoga, Lorain	33 min
Sep 7, 7:52 AM EDT	Special Weather Statement	CLE	Cuyahoga, Erie, Geauga, Lake, Lorain	83 min
Sep 7, 7:58 AM EDT	Areal Flood Advisory	CLE	Cuyahoga, Erie, Geauga, Huron, Lake, Lorain and 5 more	4 hr
Sep 7, 8:26 AM EDT	Flash Flood Warning	CLE	Cuyahoga, Erie, Geauga, Huron, Lake, Lorain and 5 more	6 hr
Sep 7, 9:06 AM EDT	Special Weather Statement	CLE	Medina, Portage, Summit	54 min
Sep 7, 10:26 AM EDT	Areal Flood Advisory	CLE	Ashtabula, Geauga, Portage, Trumbull	4 hr
Sep 7, 11:26 AM EDT	Areal Flood Advisory	CLE	Lorain, Medina, Portage, Summit, Trumbull	5 hr
Sep 7, 11:33 AM EDT	River Flood Warning	CLE	Cuyahoga	17 hr
Sep 7, 12:39 PM EDT	Areal Flood Advisory	CLE	Mahoning, Portage, Stark, Summit	3 hr
Sep 7, 12:42 PM EDT	Areal Flood Advisory	CLE	Erie, Huron, Sandusky, Seneca	3 hr
Sep 7, 1:12 PM EDT	Flash Flood Warning	CLE	Mahoning	3 hr
Sep 7, 1:59 PM EDT	Flash Flood Warning Considerable damage threat	CLE	Cuyahoga, Geauga, Lorain, Medina, Summit	4 hr
Sep 7, 2:05 PM EDT	Special Weather Statement	CLE	Knox	25 min
Sep 7, 2:40 PM EDT	Special Weather Statement	CLE	Holmes	35 min
Sep 7, 3:12 PM EDT	Special Weather Statement	CLE	Crawford	33 min
Sep 7, 3:45 PM EDT	Special Weather Statement	CLE	Ashland, Richland	30 min
Sep 7, 4:13 PM EDT	Areal Flood Advisory	CLE	Mahoning	3 hr
Sep 7, 4:14 PM EDT	Special Weather Statement	CLE	Marion	31 min
Sep 7, 4:22 PM EDT	Special Weather Statement	CLE	Holmes, Wayne	38 min
Sep 7, 4:29 PM EDT	Tornado Warning	CLE	Ashland, Knox, Richland	31 min
Sep 7, 4:54 PM EDT	Areal Flood Advisory	CLE	Ashland, Richland	3 hr
Sep 7, 4:57 PM EDT	Severe Thunderstorm Warning	CLE	Ashland, Holmes, Knox	48 min
Sep 7, 5:16 PM EDT	Severe Thunderstorm Warning	CLE	Knox, Morrow	59 min
Sep 7, 5:20 PM EDT	River Flood Warning	CLE	Lake	8 hr
Sep 7, 5:41 PM EDT	Areal Flood Advisory	CLE	Medina, Summit	2 hr
Sep 7, 5:44 PM EDT	Severe Thunderstorm Warning	CLE	Holmes	31 min
Sep 7, 5:48 PM EDT	Tornado Warning	CLE	Knox	30 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.