Alert archive / Ohio / Flash Flood Warnings in 2020

Flash Flood Warning 22, NWS Cleveland, OH

October 21, 2020Geauga County, Lake County, Ohio

NWS Cleveland, OH issued this flash flood warning at Oct 21, 2020, 5:50 AM EDT for Geauga County, Lake County, Ohio. It was in force for 4 hr. 1 report 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: Oct 21, 2020, 5:50 AM EDT (09:50 UTC)
Expired: Oct 21, 2020, 9:33 AM EDT
In force: 4 hr
Issued by: NWS Cleveland, OH
Area: Storm-based polygon
Flood severity: None

Counties Geauga County, OH, Lake County, OH

The radar

The Cleveland radar (KCLE), 53 km from the middle of the area, began a volume at 09:51 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
Oct 21, 6:16 AM EDT	FLOOD	4 S Painesville, OH	DELAYED REPORT. AUBURN RD CLOSED BETWEEN CONCORD-HAMBDEN RD AND PROUTY RD DUE TO HIGH WATER UNDER I-90.

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 00:00Z, 9.8 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 524 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 169 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.

643 
WGUS51 KCLE 210950
FFWCLE
OHC055-085-211415-
/O.NEW.KCLE.FF.W.0022.201021T0950Z-201021T1415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Cleveland OH
550 AM EDT Wed Oct 21 2020

The National Weather Service in Cleveland has issued a

* Flash Flood Warning for...
  Northern Geauga County in northeastern Ohio...
  Lake County in northeastern Ohio...

* Until 1015 AM EDT.

* At 550 AM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1.5 and 2.5 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...
  Painesville, Willowick, Chardon, Euclid, Mentor, Willoughby, 
  Eastlake, Madison, Perry, Wickliffe, Richmond Heights, Willoughby 
  Hills, Highland Heights, Kirtland, Thompson, Kirtland Hills and 
  Waite Hill.

Additional rainfall amounts of 0.5 to 1.5 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4163 8149 4176 8116 4180 8100 4165 8100
      4153 8139 4157 8139 4157 8149

FLASH FLOOD...RADAR INDICATED

$$

Clark

1 follow-up statement

656 
WGUS71 KCLE 211333
FFSCLE

Flash Flood Statement
National Weather Service Cleveland OH
933 AM EDT Wed Oct 21 2020

OHC055-085-211343-
/O.CAN.KCLE.FF.W.0022.000000T0000Z-201021T1415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Geauga OH-Lake OH-
933 AM EDT Wed Oct 21 2020

...FLASH FLOOD WARNING IS CANCELLED FOR NORTHERN GEAUGA AND LAKE 
COUNTIES...

Flood waters are receding and the heavy rain has ended. Flooding is 
no longer expected to pose a threat. Please continue to heed 
remaining road closures.

LAT...LON 4163 8149 4176 8116 4180 8100 4165 8100
      4153 8139 4157 8139 4157 8149

$$

Jaszka

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 21, 3:27 AM EDT	Areal Flood Advisory	CLE	Cuyahoga, Lorain	4 hr
Oct 21, 5:11 AM EDT	Flash Flood Warning	CLE	Cuyahoga	4 hr
Oct 21, 5:22 AM EDT	Areal Flood Advisory	CLE	Ashtabula, Geauga, Lake	28 min
Oct 21, 6:27 AM EDT	Areal Flood Advisory	CLE	Ashtabula	3 hr
Oct 21, 6:50 AM EDT	River Flood Warning	CLE	Lake	6 hr

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.