Alert archive / Ohio / Flash Flood Warnings in 2020

Flash Flood Warning 16, NWS Cleveland, OH

September 7, 202011 counties in Ohio

NWS Cleveland, OH issued this flash flood warning at Sep 7, 2020, 8:26 AM EDT for 11 counties in Ohio. It was in force for 6 hr. 17 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, 8:26 AM EDT (12:26 UTC)
Expired: Sep 7, 2020, 2:00 PM EDT
In force: 6 hr
Issued by: NWS Cleveland, OH
Area: Storm-based polygon
Flood severity: None

Counties Cuyahoga County, OH, Erie County, OH, Geauga County, OH, Huron County, OH, Lake County, OH, Lorain County, OH, Medina County, OH, Portage County, OH, Sandusky County, OH, Seneca County, OH, Summit County, OH

The radar

The Cleveland radar (KCLE), 30 km from the middle of the area, began a volume at 12:30 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, 8:40 AM EDT	HEAVY RAIN 1.7	2 Sw Norwalk, OH	COCORAHS STATION OH-HR-10 NORWALK 2.1 SW.
Sep 7, 8:54 AM EDT	FLOOD	5 S Cleveland Heights, OH	MOTORIST RESCUED FROM VEHICLE IN FLOOD WATER.
Sep 7, 9:00 AM EDT	HEAVY RAIN 1.35	1 E Norwalk, OH	COCORAHS STATION OH-HR-11 NORWALK 1.2 E.
Sep 7, 9:00 AM EDT	HEAVY RAIN 1.44	1 Nne Oberlin, OH	COCORAHS STATION OH-LR-24 OBERLIN 1.0 NNE.
Sep 7, 9:18 AM EDT	HEAVY RAIN 1.85	1 Ne Brunswick, OH
Sep 7, 10:26 AM EDT	FLOOD	Ese Garfield Heights, OH	TWO RIGHT LANES OF I-480 EAST AT SR-17 BLOCKED DUE TO FLOODING.
Sep 7, 10:26 AM EDT	FLOOD	Garfield Heights, OH	TWO RIGHT LANES OF I-480 EAST AT SR-17/GRANGER RD BLOCKED DUE TO FLOODING.
Sep 7, 11:00 AM EDT	FLOOD	4 Ne Cleveland, OH	WATER RESCUE AT MARTIN LUTHER KING JR. DRIVE AND EAST SUPERIOR AVE. MULTIPLE VEHICLES STUCK IN THE WATER UNDER THE BRIDGE ON MLK.
Sep 7, 11:00 AM EDT	HEAVY RAIN 2.74	1 Ne Brunswick, OH
Sep 7, 12:00 PM EDT	HEAVY RAIN 1.65	4 Ssw Sandusky South, OH	COCORAHS STATION OH-ER-13 SANDUSKY 6.8 S.
Sep 7, 12:21 PM EDT	HEAVY RAIN 4.26	1 N Linndale, OH	MESONET STATION EW4532 CLEVELAND.
Sep 7, 12:31 PM EDT	FLOOD	2 S Chesterland, OH	MANY LOCAL ROADS ARE FLOODED OR IMPASSABLE WITH 3.26 INCHES OF RAIN MEASURED SO FAR.
Sep 7, 1:00 PM EDT	HEAVY RAIN 3.56	Brunswick, OH	TOTAL RAIN SO FAR TODAY, WITH 0.82 INCHES IN THE LAST 2 HOURS.
Sep 7, 2:00 PM EDT	HEAVY RAIN 2.31	1 Se Sandusky, OH	12 HOUR RAINFALL TOTAL.
Sep 7, 2:00 PM EDT	HEAVY RAIN 3.23	Westlake, OH	RAINFALL SINCE 7 AM. SPOTTER REPORTED VERY TYPICAL MINOR FLOODING.
Sep 7, 2:00 PM EDT	HEAVY RAIN 3.42	North Ridgeville, OH	RAINFALL TOTAL AS OF 2 PM
Sep 7, 2:00 PM EDT	HEAVY RAIN 3.98	2 Nw Brook Park, OH	ASOS STATION KCLE CLEVELAND. RAINFALL TOTAL AS OF 2 PM.

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

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 0.4 hours before the alert went out and 173 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: 798 J/kg
Mixed-layer CIN: -63 J/kg
Mixed-layer LCL: 838 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 186 m²/s²
0-3 km storm-relative helicity: 171 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 5.7

Open this sounding in Storm Lab

The text

As transmitted.

109 
WGUS51 KCLE 071226
FFWCLE
OHC035-043-055-077-085-093-103-133-143-147-153-071600-
/O.NEW.KCLE.FF.W.0016.200907T1226Z-200907T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Cleveland has issued a

* Flash Flood Warning for...
  Erie County in north central Ohio...
  Northern Huron County in north central Ohio...
  Lorain County in north central Ohio...
  Cuyahoga County in northeastern Ohio...
  Southwestern Geauga County in northeastern Ohio...
  Southwestern Lake County in northeastern Ohio...
  Northeastern Medina County in northeastern Ohio...
  Northwestern Portage County in northeastern Ohio...
  Northern Summit County in northeastern Ohio...
  Southeastern Sandusky County in northwestern Ohio...
  Northeastern Seneca County in northwestern Ohio...

* Until noon EDT.

* At 826 AM EDT, Doppler radar 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...Doppler 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 will experience flash flooding include...
  Cleveland, Lorain, Elyria, Sandusky, Norwalk, Fremont, Willowick, 
  Vermilion, Western Vermilion, Parma, Lakewood, Euclid, Mentor, 
  Cleveland Heights, Strongsville, Brunswick, Westlake, North 
  Royalton, North Ridgeville and Solon.

Additional rainfall amounts of 1.5 to 2.5 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.

&&

LAT...LON 4139 8311 4147 8262 4141 8249 4154 8201
      4152 8175 4169 8146 4171 8131 4128 8126
      4116 8303

FLASH FLOOD...RADAR INDICATED

$$

3 follow-up statements

975 
WGUS71 KCLE 071433
FFSCLE

Flash Flood Statement
National Weather Service Cleveland OH
1033 AM EDT Mon Sep 7 2020

OHC085-071443-
/O.CAN.KCLE.FF.W.0016.000000T0000Z-200907T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lake OH-
1033 AM EDT Mon Sep 7 2020

...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHWESTERN LAKE COUNTY...

Flooding is no longer expected to pose a threat. Please continue to 
heed remaining road closures.

LAT...LON 4139 8311 4147 8262 4141 8249 4154 8201
      4151 8188 4152 8175 4166 8148 4165 8146
      4163 8149 4157 8149 4157 8130 4159 8130
      4128 8126 4116 8303

$$

OHC035-043-055-077-093-103-133-143-147-153-071600-
/O.CON.KCLE.FF.W.0016.000000T0000Z-200907T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cuyahoga OH-Erie OH-Geauga OH-Huron OH-Lorain OH-Medina OH-Portage
OH-Sandusky OH-Seneca OH-Summit OH-
1033 AM EDT Mon Sep 7 2020

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL NOON EDT TODAY FOR 
ERIE, NORTHERN HURON, LORAIN, CUYAHOGA, SOUTHWESTERN GEAUGA, 
NORTHEASTERN MEDINA, NORTHWESTERN PORTAGE, NORTHERN SUMMIT, 
SOUTHEASTERN SANDUSKY AND NORTHEASTERN SENECA COUNTIES...

At 1033 AM EDT, Doppler radar indicated thunderstorms producing 
heavy rain across the warned area. Between 1 and 3 inches of rain 
have fallen. Flash flooding is ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Doppler 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 will experience flash flooding include...
  Cleveland, Lorain, Elyria, Sandusky, Norwalk, Fremont, Willowick, 
  Vermilion, Western Vermilion, Parma, Lakewood, Euclid, Cleveland 
  Heights, Strongsville, Brunswick, Westlake, North Royalton, North 
  Ridgeville, Solon and Avon Lake.

Additional rainfall amounts of 1 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.

Excessive runoff from heavy rainfall will cause flooding of small 
creeks and streams, urban areas, highways, streets and underpasses 
as well as other drainage areas and low lying spots.

&&

LAT...LON 4139 8311 4147 8262 4141 8249 4154 8201
      4151 8188 4152 8175 4166 8148 4165 8146
      4163 8149 4157 8149 4157 8130 4159 8130
      4128 8126 4116 8303

FLASH FLOOD...RADAR INDICATED

$$

Greenawalt

981 
WGUS51 KCLE 071539
FFWCLE
OHC035-055-093-103-153-071800-
/O.EXT.KCLE.FF.W.0016.000000T0000Z-200907T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Cleveland OH
1139 AM EDT Mon Sep 7 2020

The National Weather Service in Cleveland has extended the

* Flash Flood Warning for...
  Lorain County in north central Ohio...
  Cuyahoga County in northeastern Ohio...
  Southwestern Geauga County in northeastern Ohio...
  Northeastern Medina County in northeastern Ohio...
  Northern Summit County in northeastern Ohio...

* Until 200 PM EDT.

* At 1139 AM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 4 inches of rain 
  have fallen. Flash flooding is ongoing across Cuyahoga county, 
  with multiple water rescues reported. Major flooding is occurring 
  along Big Creek, with the latest reported river stage of 13.64 
  feet at 1115 AM.

  HAZARD...Life threatening flash flooding. Thunderstorms
           producing flash flooding.

  SOURCE...Doppler radar.

  IMPACT...Life threatening flash flooding of creeks and streams,
           urban areas, highways, streets and underpasses.

* Some locations that will experience flash flooding include...
  Cleveland, Lorain, Elyria, Willowick, Vermilion, Western 
  Vermilion, Parma, Lakewood, Euclid, Cleveland Heights, 
  Strongsville, Brunswick, Westlake, North Royalton, North 
  Ridgeville, Solon, Avon Lake, Hudson, Twinsburg and Streetsboro.

Additional rainfall amounts up to 1 inch are possible in the warned 
area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Excessive runoff from heavy rainfall will cause flooding of small 
creeks and streams, urban areas, highways, streets and underpasses 
as well as other drainage areas and low lying spots.

&&

LAT...LON 4154 8201 4151 8188 4152 8175 4166 8148
      4165 8146 4163 8149 4157 8149 4157 8130
      4135 8127 4135 8139 4127 8139 4121 8234
      4143 8235 4143 8239

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

Greenawalt

982 
WGUS71 KCLE 071539
FFSCLE

Flash Flood Statement
National Weather Service Cleveland OH
1139 AM EDT Mon Sep 7 2020

OHC043-077-133-143-147-071549-
/O.CAN.KCLE.FF.W.0016.000000T0000Z-200907T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Erie OH-Huron OH-Portage OH-Sandusky OH-Seneca OH-
1139 AM EDT Mon Sep 7 2020

...FLASH FLOOD WARNING IS CANCELLED FOR ERIE, NORTHERN HURON, 
NORTHWESTERN PORTAGE, SOUTHEASTERN SANDUSKY AND NORTHEASTERN SENECA 
COUNTIES...

Flooding is no longer expected to pose a threat. A Flood Advisory 
remains in effect. Please continue to heed remaining road closures.

LAT...LON 4154 8201 4151 8188 4152 8175 4166 8148
      4165 8146 4163 8149 4157 8149 4157 8130
      4135 8127 4135 8139 4127 8139 4121 8234
      4143 8235 4143 8239

$$

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, 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, 1:50 PM EDT	Flash Flood Warning	CLE	Lorain, Medina, Portage, Summit	4 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.