Alert archive / Ohio / Flash Flood Warnings in 2020

Flash Flood Warning 12, NWS Cleveland, OH

July 8, 2020Ottawa County, Sandusky County, Ohio

NWS Cleveland, OH issued this flash flood warning at Jul 8, 2020, 7:16 PM EDT for Ottawa County, Sandusky 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 8, 2020, 7:16 PM EDT (23:16 UTC)
Expired: Jul 8, 2020, 9:55 PM EDT
In force: 3 hr
Issued by: NWS Cleveland, OH
Area: Storm-based polygon
Flood severity: None

Counties Ottawa County, OH, Sandusky County, OH

The radar

The Cleveland radar (KCLE), 112 km from the middle of the area, began a volume at 23:17 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

Detroit, MI (KDTX), launched 12:00Z, 11.3 hours before the alert went out and 132 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: 806 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 1130 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 21 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

519 
WGUS51 KCLE 082316
FFWCLE
OHC123-143-090415-
/O.NEW.KCLE.FF.W.0012.200708T2316Z-200709T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Cleveland OH
716 PM EDT Wed Jul 8 2020

The National Weather Service in Cleveland has issued a

* Flash Flood Warning for...
  Ottawa County in northwestern Ohio...
  Northwestern Sandusky County in northwestern Ohio...

* Until 1215 AM EDT.

* At 716 PM EDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Up to two inches of rain have
  already fallen. Flash flooding is ongoing or expected to begin
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar indicated.

  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 flooding include...
  Oak Harbor, Gibsonburg, Genoa, Woodville, Elmore, Lindsey, Rocky
  Ridge and Clay Center.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4163 8312 4153 8293 4137 8341 4155 8341

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR

$$

1 follow-up statement

778 
WGUS71 KCLE 090155
FFSCLE

Flash Flood Statement
National Weather Service Cleveland OH
955 PM EDT Wed Jul 8 2020

OHC123-143-090205-
/O.CAN.KCLE.FF.W.0012.000000T0000Z-200709T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Ottawa OH-Sandusky OH-
955 PM EDT Wed Jul 8 2020

...THE FLASH FLOOD WARNING FOR OTTAWA AND NORTHWESTERN SANDUSKY
COUNTIES IS CANCELLED...

The heavy rain has ended. Flooding is no longer expected to pose a
threat.

LAT...LON 4163 8312 4153 8293 4137 8341 4155 8341

$$

Lombardy

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 10:52 PM EDT	Special Marine Warning	CLE		38 min
Jul 8, 12:13 AM EDT	Special Weather Statement	CLE	Lucas	47 min
Jul 8, 3:22 PM EDT	Heat Advisory	CLE	Ashland, Crawford, Cuyahoga, Erie, Hancock, Holmes and 18 more	30 hr
Jul 8, 3:35 PM EDT	Special Weather Statement	CLE	Summit	40 min
Jul 8, 4:42 PM EDT	Special Weather Statement	CLE	Cuyahoga	48 min
Jul 8, 5:51 PM EDT	Special Weather Statement	CLE	Wood	39 min
Jul 8, 5:59 PM EDT	Special Weather Statement	CLE	Huron, Medina	46 min
Jul 8, 6:39 PM EDT	Special Weather Statement	CLE	Lucas, Ottawa, Wood	51 min
Jul 8, 6:59 PM EDT	Severe Thunderstorm Warning	CLE	Ottawa, Sandusky	42 min
Jul 8, 7:01 PM EDT	Special Marine Warning	CLE		48 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.