Alert archive / Ohio / Flash Flood Warnings in 2021

Flash Flood Warning 11, NWS Cleveland, OH

July 12, 2021Lorain County, Medina County, Ohio

NWS Cleveland, OH issued this flash flood warning at Jul 12, 2021, 11:59 AM EDT for Lorain County, Medina County, Ohio. It was in force for 4 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 12, 2021, 11:59 AM EDT (15:59 UTC)
Expired: Jul 12, 2021, 4:00 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

The radar

The Cleveland radar (KCLE), 33 km from the middle of the area, began a volume at 16:01 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

Pittsburgh, PA (KPIT), launched 12:00Z, 4.0 hours before the alert went out and 177 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: 173 J/kg
Mixed-layer CIN: -65 J/kg
Mixed-layer LCL: 637 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 46 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted.

711 
WGUS51 KCLE 121559
FFWCLE
OHC093-103-122000-
/O.NEW.KCLE.FF.W.0011.210712T1559Z-210712T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Cleveland OH
1159 AM EDT Mon Jul 12 2021

The National Weather Service in Cleveland has issued a

* Flash Flood Warning for...
  Southeastern Lorain County in north central Ohio...
  Medina County in northeastern Ohio...

* Until 400 PM EDT.

* At 1159 AM EDT, Doppler radar and automated rain gauges indicated 
  heavy rain falling 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 heavy rain.

  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...
  Medina, Strongsville, Brunswick, North Royalton, Lodi, Chippewa 
  Lake, Broadview Heights, Hinckley, Seville, Penfield, Westfield 
  Center, Spencer, Gloria Glens Park, Burbank, Briarwood Beach, 
  Chippewa-On-The-Lake and Valley City.

This includes the following streams and drainages...
Salt Creek, West Branch Rocky River, Cossett Creek, Repp Run, 
Bannister Ditch, Camel Creek, Baker Creek, Coon Creek, Yellow Creek, 
Wolf Creek, Styx River, Plum Creek, Killbuck Creek, Mallet Creek, 
Hubbard Creek, East Branch Rocky River, Muddy Fork, Little Killbuck 
Creek, Healey Creek, Chippewa Creek, Crow Creek, East Fork Black 
River and East Branch Black River.

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.

Excessive runoff from heavy rainfall will cause flooding of small 
creeks and streams, country roads, farmland, and other low lying 
spots.

&&

LAT...LON 4113 8218 4128 8196 4128 8168 4112 8169
      4099 8197 4099 8217

FLASH FLOOD...RADAR AND GAUGE INDICATED
EXPECTED RAINFALL...1-3 INCHES IN 3 HOURS 

$$

Campbell

1 follow-up statement

693 
WGUS71 KCLE 121957
FFSCLE

Flash Flood Statement
National Weather Service Cleveland OH
357 PM EDT Mon Jul 12 2021

OHC093-103-122007-
/O.EXP.KCLE.FF.W.0011.000000T0000Z-210712T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Lorain OH-Medina OH-
357 PM EDT Mon Jul 12 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 4 PM EDT THIS AFTERNOON FOR 
SOUTHEASTERN LORAIN AND MEDINA COUNTIES...

A Flash Flood Watch remains in effect until 1000 PM EDT Monday for 
portions of Ohio and northwest Pennsylvania.

LAT...LON 4113 8218 4128 8196 4128 8168 4112 8169
      4099 8197 4099 8217

$$

Campbell

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 8:39 PM EDT	Areal Flood Advisory	CLE	Ashland, Richland	3 hr
Jul 12, 3:18 AM EDT	Flash Flood Watch	CLE	Ashtabula, Cuyahoga, Erie, Geauga, Huron, Lake and 5 more	18 hr
Jul 12, 11:20 AM EDT	Areal Flood Advisory	CLE	Cuyahoga, Lorain	3 hr
Jul 12, 3:41 PM EDT	Special Weather Statement	CLE	Huron	34 min
Jul 12, 4:07 PM EDT	Special Weather Statement	CLE	Sandusky, Seneca	38 min
Jul 12, 4:30 PM EDT	Flash Flood Warning	CLE	Ashland, Cuyahoga, Lorain, Medina	6 hr
Jul 12, 4:32 PM EDT	Special Weather Statement	CLE	Medina	28 min
Jul 12, 5:11 PM EDT	Areal Flood Advisory	CLE	Cuyahoga, Geauga, Portage, Summit	6 hr
Jul 12, 5:33 PM EDT	Special Weather Statement	CLE	Stark	27 min
Jul 12, 5:34 PM EDT	Flash Flood Warning Considerable damage threat	CLE	Cuyahoga	2 hr

Nearby

Flash Flood Warnings in Ohio, 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.