Alert archive / Ohio / Flash Flood Warnings in 2021

Flash Flood Warning 17, NWS Cleveland, OH

July 16, 2021Cuyahoga County, Ohio

NWS Cleveland, OH issued this flash flood warning at Jul 16, 2021, 9:46 PM EDT for Cuyahoga 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 16, 2021, 9:46 PM EDT (01:46 UTC)
Expired: Jul 17, 2021, 12:45 AM EDT
In force: 3 hr
Issued by: NWS Cleveland, OH
Area: Storm-based polygon
Flood severity: None

County Cuyahoga County, OH

The radar

The Cleveland radar (KCLE), 21 km from the middle of the area, began a volume at 01:48 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 00:00Z, 1.8 hours before the alert went out and 170 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: 490 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 998 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 134 m²/s²
0-3 km storm-relative helicity: 118 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 3.4

Open this sounding in Storm Lab

The text

As transmitted.

701 
WGUS51 KCLE 170146
FFWCLE
OHC035-170445-
/O.NEW.KCLE.FF.W.0017.210717T0146Z-210717T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Cleveland OH
946 PM EDT Fri Jul 16 2021

The National Weather Service in Cleveland has issued a

* Flash Flood Warning for...
  East Central Cuyahoga County in northeastern Ohio...

* Until 1245 AM EDT.

* At 946 PM 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, Warrensville Heights, Highland Hills, Garfield Heights, 
  Shaker Heights, Maple Heights, Bedford, Bedford Heights, 
  Independence, Walton Hills, Newburgh Heights, Valley View, 
  Brooklyn Heights, North Randall, Cuyahoga Heights and Warrensville 
  Heigh.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

&&

LAT...LON 4145 8168 4146 8168 4146 8164 4146 8156
      4143 8148 4137 8148 4136 8155 4139 8162
      4140 8164 4141 8166 4144 8169

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1 INCH IN 2 HOURS 

$$

Greenawalt

1 follow-up statement

948 
WGUS71 KCLE 170442
FFSCLE

Flash Flood Statement
National Weather Service Cleveland OH
1242 AM EDT Sat Jul 17 2021

OHC035-170452-
/O.EXP.KCLE.FF.W.0017.000000T0000Z-210717T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cuyahoga OH-
1242 AM EDT Sat Jul 17 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 1245 AM EDT EARLY THIS MORNING 
FOR EAST CENTRAL CUYAHOGA COUNTY...

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

Additional heavy rain and flooding are possible later tonight 
through Saturday morning. A Flash Flood Watch remains in effect 
until 800 AM EDT Saturday for portions of Ohio and northwest 
Pennsylvania.

LAT...LON 4145 8168 4146 8168 4146 8164 4146 8156
      4143 8148 4137 8148 4136 8155 4139 8162
      4140 8164 4141 8166 4144 8169

$$

Maines

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 16, 8:10 PM EDT	Flash Flood Warning	CLE	Medina	5 hr
Jul 16, 8:16 PM EDT	Areal Flood Advisory	CLE	Cuyahoga, Lorain, Medina, Summit	4 hr
Jul 16, 10:09 PM EDT	Areal Flood Advisory	CLE	Cuyahoga, Geauga	4 hr
Jul 17, 12:37 AM EDT	Special Weather Statement	CLE	Knox	38 min
Jul 17, 2:05 AM EDT	Areal Flood Advisory	CLE	Medina, Summit, Wayne	6 hr
Jul 17, 2:31 AM EDT	Areal Flood Advisory	CLE	Hancock, Ottawa, Sandusky, Seneca, Wood	6 hr
Jul 17, 3:16 AM EDT	Areal Flood Advisory	CLE	Ashland, Holmes, Knox, Wayne	6 hr
Jul 17, 3:21 AM EDT	River Flood Warning	CLE	Trumbull	47 hr
Jul 17, 4:34 AM EDT	Areal Flood Advisory	CLE	Mahoning, Portage, Stark, Trumbull	7 hr
Jul 17, 4:47 AM EDT	Areal Flood Advisory	CLE	Erie	3 hr
Jul 17, 6:00 AM EDT	River Flood Warning	CLE	Lorain	58 hr
Jul 17, 6:09 AM EDT	Areal Flood Advisory	CLE	Ashtabula	6 hr
Jul 17, 8:11 AM EDT	River Flood Warning	CLE	Cuyahoga	21 hr
Jul 17, 8:25 AM EDT	Areal Flood Advisory	CLE	Ashland, Crawford, Huron, Richland, Wyandot	3 hr
Jul 17, 8:33 AM EDT	Areal Flood Advisory	CLE	Cuyahoga, Lorain, Medina, Summit	10 hr
Jul 17, 10:13 AM EDT	Areal Flood Warning	CLE	Crawford	10 hr
Jul 17, 10:20 AM EDT	Areal Flood Advisory	CLE	Geauga, Portage	5 hr
Jul 17, 10:58 AM EDT	Areal Flood Warning	CLE	Ashland, Crawford, Huron, Lorain, Medina, Richland	9 hr
Jul 17, 11:46 AM EDT	River Flood Warning	CLE	Erie	26 hr
Jul 17, 12:01 PM EDT	Areal Flood Advisory	CLE	Medina, Wayne	5 hr
Jul 17, 12:16 PM EDT	Areal Flood Advisory	CLE	Ashtabula, Trumbull	6 hr
Jul 17, 1:06 PM EDT	Flash Flood Warning	CLE	Mahoning	4 hr
Jul 17, 2:54 PM EDT	Areal Flood Warning	CLE	Stark	4 hr
Jul 17, 3:20 PM EDT	River Flood Warning	CLE	Sandusky, Wood	59 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.